mirror of
https://github.com/Nezumi-2711/google-drive-s3.git
synced 2026-09-22 20:01:19 +00:00
refactor: update the structure of the code
This commit is contained in:
@@ -0,0 +1,158 @@
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const MAX_CONTROL_LINE = 128;
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type DecoderState = "HEADER" | "DATA" | "CRLF" | "TRAILER" | "DONE";
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function asBytes(value: Uint8Array | ArrayBuffer): Uint8Array {
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return value instanceof Uint8Array ? value : new Uint8Array(value);
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}
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/** Iterates decoded payload views without scanning or copying payload bytes. */
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export async function* decodedBodyChunks(stream: ReadableStream<Uint8Array> | null, awsChunked: boolean): AsyncGenerator<Uint8Array> {
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if (!stream) return;
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const reader = stream.getReader();
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if (!awsChunked) {
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try {
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while (true) {
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const { done, value } = await reader.read();
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if (done) return;
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if (value.byteLength > 0) yield asBytes(value);
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}
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} finally {
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reader.releaseLock();
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}
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}
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let state: DecoderState = "HEADER";
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let remaining = 0;
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let control: number[] = [];
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let emitted = 0;
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const consumeControlByte = (byte: number): string | null => {
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control.push(byte);
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if (control.length > MAX_CONTROL_LINE) throw new Error("Invalid aws-chunked control line");
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const length = control.length;
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if (length < 2 || control[length - 2] !== 13 || control[length - 1] !== 10) return null;
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const line = new TextDecoder().decode(new Uint8Array(control.slice(0, -2)));
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control = [];
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return line;
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};
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try {
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while (true) {
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const { done, value } = await reader.read();
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if (done) break;
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const chunk = asBytes(value);
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let offset = 0;
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while (offset < chunk.byteLength) {
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if (state === "DATA") {
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const length = Math.min(remaining, chunk.byteLength - offset);
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if (length > 0) {
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emitted += length;
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remaining -= length;
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yield chunk.subarray(offset, offset + length);
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offset += length;
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}
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if (remaining === 0) state = "CRLF";
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continue;
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}
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const line = consumeControlByte(chunk[offset++]);
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if (line === null) continue;
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if (state === "HEADER") {
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const sizeText = line.split(";", 1)[0];
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if (!/^[0-9a-fA-F]+$/.test(sizeText)) throw new Error("Invalid aws-chunked chunk size");
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remaining = Number.parseInt(sizeText, 16);
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if (!Number.isSafeInteger(remaining)) throw new Error("aws-chunked chunk is too large");
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state = remaining === 0 ? "TRAILER" : "DATA";
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} else if (state === "CRLF") {
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if (line !== "") throw new Error("Invalid aws-chunked data terminator");
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state = "HEADER";
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} else if (state === "TRAILER" && line === "") {
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state = "DONE";
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if (offset !== chunk.byteLength) throw new Error("Unexpected bytes after aws-chunked trailer");
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} else if (state === "DONE") {
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throw new Error("Unexpected bytes after aws-chunked trailer");
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}
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}
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}
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} finally {
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reader.releaseLock();
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}
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if (state !== "DONE") throw new Error("Truncated aws-chunked body");
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return emitted;
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}
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export async function pumpBody(
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stream: ReadableStream<Uint8Array> | null,
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writer: WritableStreamDefaultWriter<ArrayBuffer | ArrayBufferView>,
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options: { awsChunked: boolean; expectedLength?: number; skipBytes?: number; maxBytes?: number; prefix?: Uint8Array } = { awsChunked: false },
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): Promise<{ written: number; tail: Uint8Array }> {
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let decoded = 0;
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let written = 0;
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let skip = options.skipBytes ?? 0;
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const tailParts: Uint8Array[] = [];
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let tailLength = 0;
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const consume = async (input: Uint8Array): Promise<void> => {
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let chunk = input;
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if (skip >= chunk.byteLength) {
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skip -= chunk.byteLength;
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return;
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}
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if (skip > 0) {
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chunk = chunk.subarray(skip);
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skip = 0;
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}
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const remaining = options.maxBytes === undefined ? chunk.byteLength : Math.max(0, options.maxBytes - written);
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const send = chunk.subarray(0, remaining);
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if (send.byteLength > 0) {
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await writer.write(send);
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written += send.byteLength;
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}
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if (send.byteLength < chunk.byteLength) {
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const tail = chunk.subarray(send.byteLength);
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tailParts.push(tail);
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tailLength += tail.byteLength;
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}
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};
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try {
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if (options.prefix) await consume(options.prefix);
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for await (const chunk of decodedBodyChunks(stream, options.awsChunked)) {
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decoded += chunk.byteLength;
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await consume(chunk);
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}
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if (skip !== 0) throw new Error("Body is shorter than the committed Drive range");
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if (options.expectedLength !== undefined && decoded !== options.expectedLength) throw new Error(`Decoded body length ${decoded} does not match x-amz-decoded-content-length ${options.expectedLength}`);
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await writer.close();
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} catch (error) {
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await writer.abort(error).catch(() => undefined);
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throw error;
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}
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const tail = new Uint8Array(tailLength);
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let offset = 0;
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for (const part of tailParts) {
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tail.set(part, offset);
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offset += part.byteLength;
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}
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return { written, tail };
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}
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export function isAwsChunked(request: Request): boolean {
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return (
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request.headers
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.get("content-encoding")
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?.split(",")
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.some((encoding) => encoding.trim().toLowerCase() === "aws-chunked") ?? false
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);
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}
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export function decodedContentLength(request: Request): number | undefined {
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const value = request.headers.get("x-amz-decoded-content-length") ?? request.headers.get("content-length");
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if (value === null || !/^\d+$/.test(value)) return undefined;
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const length = Number(value);
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return Number.isSafeInteger(length) ? length : undefined;
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}
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@@ -0,0 +1,126 @@
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import type { Env } from "./types";
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function encodeRFC3986(str: string): string {
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return encodeURIComponent(str).replace(/[!'()*]/g, (c) => `%${c.charCodeAt(0).toString(16).toUpperCase()}`);
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}
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function bufToHex(buf: ArrayBuffer): string {
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return Array.from(new Uint8Array(buf))
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.map((b) => b.toString(16).padStart(2, "0"))
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.join("");
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}
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async function hmacSha256(key: string | ArrayBuffer, data: string): Promise<ArrayBuffer> {
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const keyData = typeof key === "string" ? new TextEncoder().encode(key) : key;
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const cryptoKey = await crypto.subtle.importKey("raw", keyData, { name: "HMAC", hash: "SHA-256" }, false, ["sign"]);
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return await crypto.subtle.sign("HMAC", cryptoKey, new TextEncoder().encode(data));
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}
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async function sha256(data: string): Promise<string> {
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const hash = await crypto.subtle.digest("SHA-256", new TextEncoder().encode(data));
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return bufToHex(hash);
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}
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async function getSigningKey(secret: string, date: string, region: string, service: string): Promise<ArrayBuffer> {
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const kDate = await hmacSha256(`AWS4${secret}`, date);
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const kRegion = await hmacSha256(kDate, region);
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const kService = await hmacSha256(kRegion, service);
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return await hmacSha256(kService, "aws4_request");
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}
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async function createCanonicalRequest(request: Request, isQueryAuth: boolean): Promise<string> {
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const url = new URL(request.url);
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const method = request.method;
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const canonicalUri = url.pathname || "/";
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const params = Array.from(url.searchParams.entries())
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.filter(([key]) => key !== "X-Amz-Signature")
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.sort(([a], [b]) => {
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if (a < b) return -1;
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if (a > b) return 1;
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return 0;
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})
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.map(([key, val]) => `${encodeRFC3986(key)}=${encodeRFC3986(val)}`)
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.join("&");
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let signedHeadersList: string[];
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if (isQueryAuth) {
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signedHeadersList = (url.searchParams.get("X-Amz-SignedHeaders") ?? "host").split(";");
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} else {
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const authHeader = request.headers.get("Authorization") ?? "";
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const match = authHeader.match(/SignedHeaders=([^,\s]+)/);
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signedHeadersList = match ? match[1].split(";") : ["host"];
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}
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const canonicalHeaders = signedHeadersList
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.map((h) => {
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const headerName = h.toLowerCase();
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let headerValue = "";
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if (headerName === "host") {
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headerValue = url.hostname;
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const port = url.port;
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if (port && !((url.protocol === "https:" && port === "443") || (url.protocol === "http:" && port === "80"))) {
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headerValue += `:${port}`;
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}
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} else {
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headerValue = request.headers.get(headerName)?.trim() ?? "";
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}
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return `${headerName}:${headerValue}\n`;
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})
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.join("");
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const signedHeaders = signedHeadersList.join(";");
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const payloadHash = request.headers.get("x-amz-content-sha256") ?? "UNSIGNED-PAYLOAD";
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return [method, canonicalUri, params, canonicalHeaders, signedHeaders, payloadHash].join("\n");
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}
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/** Verifies an AWS Signature V4 signature carried in either the Authorization header or presigned query params. */
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export async function verifySignature(request: Request, env: Env): Promise<boolean> {
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const url = new URL(request.url);
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const headers = request.headers;
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const isQueryAuth = url.searchParams.has("X-Amz-Algorithm");
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let algorithm: string;
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if (isQueryAuth) {
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algorithm = url.searchParams.get("X-Amz-Algorithm") ?? "";
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} else {
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const authHeader = headers.get("Authorization") ?? "";
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algorithm = authHeader.split(" ")[0];
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}
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if (!algorithm?.includes("AWS4-HMAC-SHA256")) {
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return false;
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}
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const datetime = (isQueryAuth ? url.searchParams.get("X-Amz-Date") : headers.get("x-amz-date")) ?? "";
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if (!datetime) return false;
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const date = datetime.substring(0, 8);
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const canonicalRequest = await createCanonicalRequest(request, isQueryAuth);
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const hashedCanonicalRequest = await sha256(canonicalRequest);
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const credentialScope = `${date}/${env.REGION}/s3/aws4_request`;
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const stringToSign = ["AWS4-HMAC-SHA256", datetime, credentialScope, hashedCanonicalRequest].join("\n");
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const signingKey = await getSigningKey(env.SECRET_KEY, date, env.REGION, "s3");
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const signature = await hmacSha256(signingKey, stringToSign);
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const signatureHex = bufToHex(signature);
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let expectedSignature = "";
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if (isQueryAuth) {
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expectedSignature = url.searchParams.get("X-Amz-Signature") ?? "";
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} else {
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const authHeader = headers.get("Authorization") ?? "";
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const match = authHeader.match(/Signature=([a-f0-9]+)/);
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expectedSignature = match ? match[1] : "";
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}
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return signatureHex === expectedSignature;
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}
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@@ -0,0 +1,34 @@
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import type { Env } from "./types";
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/**
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* Checks whether the bucket is present in the ALLOWED_BUCKETS allowlist.
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* Access is denied by default when the allowlist is missing or empty.
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*/
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export function isAllowedBucket(bucket: string, env: Env): boolean {
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if (!env.ALLOWED_BUCKETS) {
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return false;
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}
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const allowedBuckets = env.ALLOWED_BUCKETS.split(",")
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.map((b) => b.trim())
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.filter((b) => b);
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if (allowedBuckets.length === 0) {
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return false;
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}
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return allowedBuckets.includes(bucket);
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}
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/** Checks whether the bucket allows unauthenticated read access. */
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export function isPublicReadBucket(bucket: string, env: Env): boolean {
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if (!env.PUBLIC_READ_BUCKETS) {
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return false;
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}
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const publicReadBuckets = env.PUBLIC_READ_BUCKETS.split(",")
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.map((b) => b.trim())
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.filter((b) => b);
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return publicReadBuckets.includes(bucket);
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}
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@@ -0,0 +1,76 @@
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import type { DriveUploadResult } from "./types";
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export const DRIVE_CHUNK_SIZE = 256 * 1024;
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const DRIVE_FIELDS = "id,name,size,mimeType,md5Checksum";
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export function alignedSendLen(driveOffset: number, available: number): number {
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if (available <= 1) return 0;
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return Math.max(0, Math.floor((driveOffset + available - 1) / DRIVE_CHUNK_SIZE) * DRIVE_CHUNK_SIZE - driveOffset);
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}
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export async function createSession(accessToken: string, metadata: { name: string; parents: string[]; mimeType: string; existingFileId?: string }): Promise<string> {
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const url = metadata.existingFileId ? `https://www.googleapis.com/upload/drive/v3/files/${metadata.existingFileId}?uploadType=resumable&fields=${encodeURIComponent(DRIVE_FIELDS)}` : `https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable&fields=${encodeURIComponent(DRIVE_FIELDS)}`;
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const response = await fetch(url, {
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method: metadata.existingFileId ? "PATCH" : "POST",
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headers: {
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Authorization: `Bearer ${accessToken}`,
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"Content-Type": "application/json; charset=UTF-8",
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"X-Upload-Content-Type": metadata.mimeType,
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},
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body: JSON.stringify(metadata.existingFileId ? { name: metadata.name } : { name: metadata.name, parents: metadata.parents }),
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});
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const uploadUrl = response.headers.get("Location");
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if (!response.ok || !uploadUrl) throw new Error(`Failed to create Drive resumable session (${response.status})`);
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return uploadUrl;
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}
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export function nextDriveOffset(response: Response): number {
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const range = response.headers.get("Range");
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if (!range) return 0;
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const match = /^bytes=0-(\d+)$/.exec(range);
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if (!match) throw new Error("Drive returned an invalid committed range");
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return Number(match[1]) + 1;
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}
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export async function queryStatus(uploadUrl: string, accessToken: string): Promise<number> {
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const response = await fetch(uploadUrl, {
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method: "PUT",
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headers: { Authorization: `Bearer ${accessToken}`, "Content-Length": "0", "Content-Range": "bytes */*" },
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});
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if (response.status === 308) return nextDriveOffset(response);
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if (response.ok) {
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const metadata = await response.json<DriveUploadResult>();
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return Number(metadata.size ?? 0);
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}
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throw new Error(`Drive resumable status query failed (${response.status})`);
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}
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export async function putFinalChunk(uploadUrl: string, accessToken: string, startOffset: number, total: number, body: Uint8Array): Promise<DriveUploadResult> {
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const response = await fetch(uploadUrl, {
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method: "PUT",
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headers: {
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Authorization: `Bearer ${accessToken}`,
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"Content-Length": body.byteLength.toString(),
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"Content-Range": `bytes ${startOffset}-${total - 1}/${total}`,
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||||
},
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||||
body,
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||||
});
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if (!response.ok) throw new Error(`Drive final chunk failed (${response.status}): ${await response.text()}`);
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return await response.json<DriveUploadResult>();
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}
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export async function createEmptyFile(accessToken: string, metadata: { name: string; parents: string[]; mimeType: string; existingFileId?: string }): Promise<DriveUploadResult> {
|
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const url = metadata.existingFileId ? `https://www.googleapis.com/drive/v3/files/${metadata.existingFileId}?fields=${encodeURIComponent(DRIVE_FIELDS)}` : `https://www.googleapis.com/drive/v3/files?fields=${encodeURIComponent(DRIVE_FIELDS)}`;
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const response = await fetch(url, {
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method: metadata.existingFileId ? "PATCH" : "POST",
|
||||
headers: { Authorization: `Bearer ${accessToken}`, "Content-Type": "application/json" },
|
||||
body: JSON.stringify(metadata.existingFileId ? { name: metadata.name } : { name: metadata.name, parents: metadata.parents, mimeType: metadata.mimeType }),
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||||
});
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if (!response.ok) throw new Error(`Drive empty-file creation failed (${response.status})`);
|
||||
return await response.json<DriveUploadResult>();
|
||||
}
|
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export async function cancelSession(uploadUrl: string, accessToken: string): Promise<void> {
|
||||
const response = await fetch(uploadUrl, { method: "DELETE", headers: { Authorization: `Bearer ${accessToken}` } });
|
||||
if (response.status !== 499 && !response.ok && response.status !== 404) throw new Error(`Drive resumable cancellation failed (${response.status})`);
|
||||
}
|
||||
@@ -0,0 +1,270 @@
|
||||
import { decodedContentLength, isAwsChunked, pumpBody } from "./aws-chunked";
|
||||
import type { DriveDownloadResult, DriveFileMetadata, DriveUploadResult, Env, GoogleDriveFile, GoogleDriveSearchResponse } from "./types";
|
||||
|
||||
interface GoogleTokenResponse {
|
||||
access_token: string;
|
||||
expires_in: number;
|
||||
error_description?: string;
|
||||
}
|
||||
|
||||
interface GoogleDriveCreateResponse {
|
||||
id: string;
|
||||
}
|
||||
|
||||
const DRIVE_FIELDS = "id,name,size,mimeType,md5Checksum";
|
||||
|
||||
function driveLiteral(value: string): string {
|
||||
return value.replace(/\\/g, "\\\\").replace(/'/g, "\\'");
|
||||
}
|
||||
|
||||
function driveFilesUrl(q: string, fields: string): string {
|
||||
const url = new URL("https://www.googleapis.com/drive/v3/files");
|
||||
url.searchParams.set("q", q);
|
||||
url.searchParams.set("fields", fields);
|
||||
return url.toString();
|
||||
}
|
||||
|
||||
/** Fetches an OAuth access token, using the KV-cached one when available. */
|
||||
export async function getAccessToken(env: Env): Promise<string> {
|
||||
const cacheKey = "google_access_token";
|
||||
|
||||
const cachedToken = await env.AUTH_KV.get(cacheKey);
|
||||
if (cachedToken) {
|
||||
return cachedToken;
|
||||
}
|
||||
|
||||
const response = await fetch("https://oauth2.googleapis.com/token", {
|
||||
method: "POST",
|
||||
headers: { "Content-Type": "application/x-www-form-urlencoded" },
|
||||
body: new URLSearchParams({
|
||||
client_id: env.GOOGLE_CLIENT_ID,
|
||||
client_secret: env.GOOGLE_CLIENT_SECRET,
|
||||
refresh_token: env.GOOGLE_REFRESH_TOKEN,
|
||||
grant_type: "refresh_token",
|
||||
}),
|
||||
});
|
||||
|
||||
const data: GoogleTokenResponse = await response.json();
|
||||
if (!response.ok) {
|
||||
throw new Error(`Token Error: ${data.error_description}`);
|
||||
}
|
||||
|
||||
await env.AUTH_KV.put(cacheKey, data.access_token, {
|
||||
expirationTtl: data.expires_in - 60,
|
||||
});
|
||||
|
||||
return data.access_token;
|
||||
}
|
||||
|
||||
/** Finds a folder by name under the given parent, creating it if it doesn't exist yet. */
|
||||
async function getOrCreateFolder(accessToken: string, folderName: string, parentId: string | null, env: Env): Promise<string> {
|
||||
// Include parentId in the cache key so folders with the same name in different parents don't collide.
|
||||
const cacheKey = parentId ? `${parentId}/${folderName}` : folderName;
|
||||
const cached = await env.FOLDER_CACHE.get(cacheKey);
|
||||
if (cached) return cached;
|
||||
|
||||
const parentQuery = parentId ? ` and '${parentId}' in parents` : "";
|
||||
const searchRes = await fetch(driveFilesUrl(`name='${driveLiteral(folderName)}' and mimeType='application/vnd.google-apps.folder' and trashed=false${parentQuery}`, "files(id,name)"), {
|
||||
headers: { Authorization: `Bearer ${accessToken}` },
|
||||
});
|
||||
|
||||
const searchData: GoogleDriveSearchResponse = await searchRes.json();
|
||||
|
||||
if (searchData.files && searchData.files.length > 0) {
|
||||
const folderId = searchData.files[0].id;
|
||||
await env.FOLDER_CACHE.put(cacheKey, folderId, { expirationTtl: 3600 });
|
||||
return folderId;
|
||||
}
|
||||
|
||||
const createBody: { name: string; mimeType: string; parents?: string[] } = {
|
||||
name: folderName,
|
||||
mimeType: "application/vnd.google-apps.folder",
|
||||
};
|
||||
|
||||
if (parentId) {
|
||||
createBody.parents = [parentId];
|
||||
}
|
||||
|
||||
const createRes = await fetch("https://www.googleapis.com/drive/v3/files", {
|
||||
method: "POST",
|
||||
headers: {
|
||||
Authorization: `Bearer ${accessToken}`,
|
||||
"Content-Type": "application/json",
|
||||
},
|
||||
body: JSON.stringify(createBody),
|
||||
});
|
||||
|
||||
const createData: GoogleDriveCreateResponse = await createRes.json();
|
||||
await env.FOLDER_CACHE.put(cacheKey, createData.id, { expirationTtl: 3600 });
|
||||
return createData.id;
|
||||
}
|
||||
|
||||
/** Resolves an S3 object key to its parent folder ID, creating the directory hierarchy as needed. */
|
||||
export async function resolvePathToFolderAndFile(accessToken: string, bucket: string, objectKey: string, env: Env): Promise<{ parentFolderId: string; fileName: string }> {
|
||||
let currentFolderId = await getOrCreateFolder(accessToken, bucket, null, env);
|
||||
|
||||
const parts = objectKey.split("/").filter((p) => p);
|
||||
|
||||
if (parts.length === 0) {
|
||||
throw new Error("Invalid object key");
|
||||
}
|
||||
|
||||
const fileName = parts[parts.length - 1];
|
||||
const directories = parts.slice(0, -1);
|
||||
|
||||
for (const dir of directories) {
|
||||
currentFolderId = await getOrCreateFolder(accessToken, dir, currentFolderId, env);
|
||||
}
|
||||
|
||||
return {
|
||||
parentFolderId: currentFolderId,
|
||||
fileName: fileName,
|
||||
};
|
||||
}
|
||||
|
||||
export async function streamUploadToDrive(accessToken: string, request: Request, bucket: string, objectKey: string, mimeType: string, env: Env): Promise<DriveUploadResult> {
|
||||
const { parentFolderId, fileName } = await resolvePathToFolderAndFile(accessToken, bucket, objectKey, env);
|
||||
const existing = await findFileInFolder(accessToken, parentFolderId, fileName);
|
||||
const initUrl = existing ? `https://www.googleapis.com/upload/drive/v3/files/${existing.id}?uploadType=resumable&fields=${encodeURIComponent(DRIVE_FIELDS)}` : `https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable&fields=${encodeURIComponent(DRIVE_FIELDS)}`;
|
||||
const decodedLength = decodedContentLength(request);
|
||||
|
||||
// Initialize a resumable upload session.
|
||||
const initRes = await fetch(initUrl, {
|
||||
method: existing ? "PATCH" : "POST",
|
||||
headers: {
|
||||
Authorization: `Bearer ${accessToken}`,
|
||||
"X-Upload-Content-Type": mimeType,
|
||||
...(decodedLength === undefined ? {} : { "X-Upload-Content-Length": decodedLength.toString() }),
|
||||
"Content-Type": "application/json; charset=UTF-8",
|
||||
},
|
||||
body: JSON.stringify(existing ? { name: fileName } : { name: fileName, parents: [parentFolderId] }),
|
||||
});
|
||||
|
||||
const uploadUrl = initRes.headers.get("Location");
|
||||
if (!uploadUrl) {
|
||||
console.error(initRes.status);
|
||||
console.error(await initRes.text());
|
||||
throw new Error("Failed to get upload URL");
|
||||
}
|
||||
|
||||
let uploadRes: Response;
|
||||
if (isAwsChunked(request)) {
|
||||
if (decodedLength === undefined) throw new Error("x-amz-decoded-content-length is required for aws-chunked uploads");
|
||||
const decoded = new FixedLengthStream(decodedLength, { highWaterMark: 1 << 20 });
|
||||
const uploadPromise = fetch(uploadUrl, {
|
||||
method: "PUT",
|
||||
headers: { Authorization: `Bearer ${accessToken}`, "Content-Length": decodedLength.toString() },
|
||||
body: decoded.readable,
|
||||
duplex: "half",
|
||||
} as RequestInit);
|
||||
await pumpBody(request.body, decoded.writable.getWriter(), { awsChunked: true, expectedLength: decodedLength });
|
||||
uploadRes = await uploadPromise;
|
||||
} else {
|
||||
const body = request.body ?? new Uint8Array();
|
||||
uploadRes = await fetch(uploadUrl, {
|
||||
method: "PUT",
|
||||
headers: { Authorization: `Bearer ${accessToken}`, ...(decodedLength === undefined ? {} : { "Content-Length": decodedLength.toString() }) },
|
||||
body,
|
||||
duplex: "half",
|
||||
} as RequestInit);
|
||||
}
|
||||
|
||||
if (!uploadRes.ok) {
|
||||
const errorText = await uploadRes.text();
|
||||
throw new Error(`Upload failed: ${errorText}`);
|
||||
}
|
||||
|
||||
return await uploadRes.json();
|
||||
}
|
||||
|
||||
export async function findFileInFolder(accessToken: string, folderId: string, fileName: string): Promise<GoogleDriveFile | null> {
|
||||
const searchRes = await fetch(driveFilesUrl(`name='${driveLiteral(fileName)}' and '${driveLiteral(folderId)}' in parents and trashed=false`, `files(${DRIVE_FIELDS})`), {
|
||||
headers: { Authorization: `Bearer ${accessToken}` },
|
||||
});
|
||||
|
||||
const data: GoogleDriveSearchResponse = await searchRes.json();
|
||||
return data.files && data.files.length > 0 ? data.files[0] : null;
|
||||
}
|
||||
|
||||
export async function streamDownloadFromDrive(accessToken: string, bucket: string, objectKey: string, env: Env, range?: string): Promise<DriveDownloadResult> {
|
||||
const { parentFolderId, fileName } = await resolvePathToFolderAndFile(accessToken, bucket, objectKey, env);
|
||||
const file = await findFileInFolder(accessToken, parentFolderId, fileName);
|
||||
|
||||
if (!file) {
|
||||
throw new Error("File not found");
|
||||
}
|
||||
|
||||
const controller = new AbortController();
|
||||
const timeout = setTimeout(() => {
|
||||
controller.abort();
|
||||
}, 30000);
|
||||
|
||||
const downloadRes = await fetch(`https://www.googleapis.com/drive/v3/files/${file.id}?alt=media`, {
|
||||
headers: { Authorization: `Bearer ${accessToken}`, ...(range ? { Range: range } : {}) },
|
||||
signal: controller.signal,
|
||||
});
|
||||
|
||||
clearTimeout(timeout);
|
||||
|
||||
if (!downloadRes.ok) {
|
||||
console.error(downloadRes.status);
|
||||
console.error(await downloadRes.text());
|
||||
throw new Error("Download failed");
|
||||
}
|
||||
|
||||
return {
|
||||
body: downloadRes.body!,
|
||||
contentType: file.mimeType || "application/octet-stream",
|
||||
size: parseInt(file.size || "0", 10),
|
||||
id: file.id,
|
||||
md5Checksum: file.md5Checksum,
|
||||
status: downloadRes.status,
|
||||
contentRange: downloadRes.headers.get("Content-Range") ?? undefined,
|
||||
contentLength: downloadRes.headers.get("Content-Length") ?? undefined,
|
||||
};
|
||||
}
|
||||
|
||||
export async function deleteFromDrive(accessToken: string, bucket: string, objectKey: string, env: Env): Promise<void> {
|
||||
const { parentFolderId, fileName } = await resolvePathToFolderAndFile(accessToken, bucket, objectKey, env);
|
||||
const file = await findFileInFolder(accessToken, parentFolderId, fileName);
|
||||
|
||||
if (!file) {
|
||||
throw new Error("File not found");
|
||||
}
|
||||
|
||||
const deleteRes = await fetch(`https://www.googleapis.com/drive/v3/files/${file.id}`, {
|
||||
method: "DELETE",
|
||||
headers: { Authorization: `Bearer ${accessToken}` },
|
||||
});
|
||||
|
||||
if (!deleteRes.ok) {
|
||||
throw new Error("Delete failed");
|
||||
}
|
||||
}
|
||||
|
||||
export async function getFileMetadata(accessToken: string, bucket: string, objectKey: string, env: Env): Promise<DriveFileMetadata> {
|
||||
const { parentFolderId, fileName } = await resolvePathToFolderAndFile(accessToken, bucket, objectKey, env);
|
||||
const file = await findFileInFolder(accessToken, parentFolderId, fileName);
|
||||
|
||||
if (!file) {
|
||||
throw new Error("File not found");
|
||||
}
|
||||
|
||||
return {
|
||||
id: file.id,
|
||||
mimeType: file.mimeType || "application/octet-stream",
|
||||
size: parseInt(file.size || "0", 10),
|
||||
md5Checksum: file.md5Checksum,
|
||||
};
|
||||
}
|
||||
|
||||
export async function listFiles(accessToken: string, bucket: string, env: Env): Promise<GoogleDriveFile[]> {
|
||||
const folderId = await getOrCreateFolder(accessToken, bucket, null, env);
|
||||
|
||||
const listRes = await fetch(driveFilesUrl(`'${driveLiteral(folderId)}' in parents and trashed=false`, "files(id,name,mimeType,size,modifiedTime,md5Checksum)"), {
|
||||
headers: { Authorization: `Bearer ${accessToken}` },
|
||||
});
|
||||
|
||||
const data: GoogleDriveSearchResponse = await listRes.json();
|
||||
return data.files || [];
|
||||
}
|
||||
+28
-573
@@ -1,581 +1,36 @@
|
||||
/**
|
||||
* S3-Compatible API Server on Cloudflare Workers
|
||||
* Backend: Google Drive with streaming support and nested directory structure
|
||||
*/
|
||||
import { verifySignature } from "./aws-signature";
|
||||
import { isAllowedBucket, isPublicReadBucket } from "./bucket-access";
|
||||
import { getAccessToken } from "./google-drive";
|
||||
import { MultipartUploadDO } from "./multipart-do";
|
||||
import { dispatch } from "./router";
|
||||
import { S3Exception, s3Error } from "./s3-errors";
|
||||
import type { Env } from "./types";
|
||||
|
||||
export { MultipartUploadDO };
|
||||
|
||||
export default {
|
||||
async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
|
||||
async fetch(request: Request, env: Env, _ctx: ExecutionContext): Promise<Response> {
|
||||
if (request.method === "OPTIONS") return new Response(null, { status: 204 });
|
||||
|
||||
const url = new URL(request.url);
|
||||
const pathParts = url.pathname.split("/").filter(Boolean);
|
||||
const bucket = pathParts[0] || "";
|
||||
const objectKey = pathParts.slice(1).join("/");
|
||||
const resource = url.pathname || "/";
|
||||
|
||||
try {
|
||||
if (request.method === "OPTIONS") {
|
||||
return new Response(null, { status: 204 });
|
||||
if (!isAllowedBucket(bucket, env)) return s3Error("AccessDenied", 403, undefined, resource, request.method === "HEAD");
|
||||
|
||||
const isPublicRead = isPublicReadBucket(bucket, env) && (request.method === "GET" || request.method === "HEAD");
|
||||
if (!isPublicRead && !(await verifySignature(request, env))) {
|
||||
return s3Error("SignatureDoesNotMatch", 403, undefined, resource, request.method === "HEAD");
|
||||
}
|
||||
|
||||
const url = new URL(request.url);
|
||||
const method = request.method;
|
||||
|
||||
// パスからバケット名とオブジェクトキーを抽出
|
||||
const pathParts = url.pathname.split("/").filter((p) => p);
|
||||
const bucket = pathParts[0] || "";
|
||||
const objectKey = pathParts.slice(1).join("/");
|
||||
|
||||
if (!isAllowedBucket(bucket, env)) {
|
||||
return new Response("Access denied to this bucket", { status: 403 });
|
||||
}
|
||||
|
||||
const isPublicRead = isPublicReadBucket(bucket, env);
|
||||
const isReadMethod = method === "GET" || method === "HEAD";
|
||||
|
||||
if (!(isPublicRead && isReadMethod)) {
|
||||
const isValid = await verifySignature(request, env);
|
||||
if (!isValid) {
|
||||
return new Response("Invalid Signature", { status: 403 });
|
||||
}
|
||||
}
|
||||
|
||||
const accessToken = await getAccessToken(env);
|
||||
|
||||
if (method === "PUT" || method === "POST") {
|
||||
// ストリーミングアップロード
|
||||
if (!objectKey) {
|
||||
return new Response("Object key required", { status: 400 });
|
||||
}
|
||||
|
||||
const contentType = request.headers.get("Content-Type") || "application/octet-stream";
|
||||
const result = await streamUploadToDrive(accessToken, request.body, bucket, objectKey, contentType, env);
|
||||
|
||||
return new Response(JSON.stringify(result), {
|
||||
status: 200,
|
||||
headers: {
|
||||
"Content-Type": "application/json",
|
||||
ETag: `"${result.id}"`, // Google DriveのファイルIDをETagとして使用
|
||||
},
|
||||
});
|
||||
} else if (method === "GET") {
|
||||
// ストリーミングダウンロード
|
||||
if (!objectKey) {
|
||||
// バケット（フォルダ）の一覧を返す
|
||||
const files = await listFiles(accessToken, bucket, env);
|
||||
return new Response(generateListBucketResult(files, bucket), {
|
||||
status: 200,
|
||||
headers: { "Content-Type": "application/xml" },
|
||||
});
|
||||
}
|
||||
|
||||
try {
|
||||
const fileStream = await streamDownloadFromDrive(accessToken, bucket, objectKey, env);
|
||||
|
||||
return new Response(fileStream.body, {
|
||||
status: 200,
|
||||
headers: {
|
||||
"Content-Type": fileStream.contentType,
|
||||
"Content-Length": fileStream.size.toString(),
|
||||
"Cache-Control": "s-maxage=300, no-store",
|
||||
ETag: `"${fileStream.id}"`,
|
||||
},
|
||||
});
|
||||
} catch (e) {
|
||||
const error = e as Error;
|
||||
if (error.message === "File not found") {
|
||||
return new Response("NoSuchKey", { status: 404 });
|
||||
}
|
||||
throw e;
|
||||
}
|
||||
} else if (method === "DELETE") {
|
||||
// ファイル削除
|
||||
if (!objectKey) {
|
||||
return new Response("Object key required", { status: 400 });
|
||||
}
|
||||
|
||||
try {
|
||||
await deleteFromDrive(accessToken, bucket, objectKey, env);
|
||||
return new Response(null, { status: 204 });
|
||||
} catch (e) {
|
||||
const error = e as Error;
|
||||
if (error.message === "File not found") {
|
||||
return new Response(null, { status: 404 });
|
||||
}
|
||||
throw e;
|
||||
}
|
||||
} else if (method === "HEAD") {
|
||||
// メタデータ取得
|
||||
if (!objectKey) {
|
||||
return new Response(null, { status: 400 });
|
||||
}
|
||||
|
||||
try {
|
||||
const metadata = await getFileMetadata(accessToken, bucket, objectKey, env);
|
||||
return new Response(null, {
|
||||
status: 200,
|
||||
headers: {
|
||||
"Content-Type": metadata.mimeType,
|
||||
"Content-Length": metadata.size.toString(),
|
||||
ETag: `"${metadata.id}"`,
|
||||
},
|
||||
});
|
||||
} catch (e) {
|
||||
const error = e as Error;
|
||||
if (error.message === "File not found") {
|
||||
return new Response(null, { status: 404 });
|
||||
}
|
||||
throw e;
|
||||
}
|
||||
}
|
||||
|
||||
return new Response("Method not allowed", { status: 405 });
|
||||
} catch (e) {
|
||||
const error = e as Error;
|
||||
console.error("Error:", error);
|
||||
return new Response(error.message, { status: 500 });
|
||||
return await dispatch(request, env, await getAccessToken(env), bucket, objectKey);
|
||||
} catch (error) {
|
||||
if (error instanceof S3Exception) return s3Error(error.code, error.status, error.message, resource, request.method === "HEAD", error.headers);
|
||||
console.error(JSON.stringify({ message: "request failed", error: error instanceof Error ? error.message : String(error), method: request.method, path: url.pathname }));
|
||||
return s3Error("InternalError", 500, undefined, resource, request.method === "HEAD");
|
||||
}
|
||||
},
|
||||
} satisfies ExportedHandler<Env>;
|
||||
|
||||
interface Env {
|
||||
ACCESS_KEY: string;
|
||||
SECRET_KEY: string;
|
||||
REGION: string;
|
||||
GOOGLE_CLIENT_ID: string;
|
||||
GOOGLE_CLIENT_SECRET: string;
|
||||
GOOGLE_REFRESH_TOKEN: string;
|
||||
AUTH_KV: KVNamespace;
|
||||
FOLDER_CACHE: KVNamespace;
|
||||
ALLOWED_BUCKETS?: string;
|
||||
PUBLIC_READ_BUCKETS?: string;
|
||||
}
|
||||
|
||||
interface GoogleDriveFile {
|
||||
id: string;
|
||||
name: string;
|
||||
mimeType: string;
|
||||
size: string;
|
||||
modifiedTime?: string;
|
||||
}
|
||||
|
||||
interface GoogleDriveSearchResponse {
|
||||
files?: GoogleDriveFile[];
|
||||
}
|
||||
|
||||
function isAllowedBucket(bucket: string, env: Env): boolean {
|
||||
console.log(bucket);
|
||||
// 許可リストが設定されていない場合はすべて拒否
|
||||
if (!env.ALLOWED_BUCKETS) {
|
||||
return false;
|
||||
}
|
||||
|
||||
const allowedBuckets = env.ALLOWED_BUCKETS.split(",")
|
||||
.map((b) => b.trim())
|
||||
.filter((b) => b);
|
||||
|
||||
// 空の許可リストの場合もすべて拒否
|
||||
if (allowedBuckets.length === 0) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// バケット名が許可リストに含まれているかチェック
|
||||
return allowedBuckets.includes(bucket);
|
||||
}
|
||||
|
||||
function isPublicReadBucket(bucket: string, env: Env): boolean {
|
||||
if (!env.PUBLIC_READ_BUCKETS) {
|
||||
return false;
|
||||
}
|
||||
|
||||
const publicReadBuckets = env.PUBLIC_READ_BUCKETS.split(",")
|
||||
.map((b) => b.trim())
|
||||
.filter((b) => b);
|
||||
|
||||
return publicReadBuckets.includes(bucket);
|
||||
}
|
||||
|
||||
// ========================================
|
||||
// Google Drive API Functions
|
||||
// ========================================
|
||||
|
||||
async function getAccessToken(env: Env): Promise<string> {
|
||||
const cacheKey = "google_access_token";
|
||||
|
||||
const cachedToken = await env.AUTH_KV.get(cacheKey);
|
||||
if (cachedToken) {
|
||||
return cachedToken;
|
||||
}
|
||||
|
||||
const response = await fetch("https://oauth2.googleapis.com/token", {
|
||||
method: "POST",
|
||||
headers: { "Content-Type": "application/x-www-form-urlencoded" },
|
||||
body: new URLSearchParams({
|
||||
client_id: env.GOOGLE_CLIENT_ID,
|
||||
client_secret: env.GOOGLE_CLIENT_SECRET,
|
||||
refresh_token: env.GOOGLE_REFRESH_TOKEN,
|
||||
grant_type: "refresh_token",
|
||||
}),
|
||||
});
|
||||
|
||||
const data: any = await response.json();
|
||||
if (!response.ok) {
|
||||
throw new Error(`Token Error: ${data.error_description}`);
|
||||
}
|
||||
|
||||
await env.AUTH_KV.put(cacheKey, data.access_token, {
|
||||
expirationTtl: data.expires_in - 60,
|
||||
});
|
||||
|
||||
return data.access_token;
|
||||
}
|
||||
|
||||
async function getOrCreateFolder(accessToken: string, folderName: string, parentId: string | null, env: Env): Promise<string> {
|
||||
// キャッシュキーにparentIdを含める
|
||||
const cacheKey = parentId ? `${parentId}/${folderName}` : folderName;
|
||||
const cached = await env.FOLDER_CACHE.get(cacheKey);
|
||||
if (cached) return cached;
|
||||
|
||||
// フォルダを検索（親フォルダを指定）
|
||||
const parentQuery = parentId ? ` and '${parentId}' in parents` : "";
|
||||
const searchRes = await fetch(`https://www.googleapis.com/drive/v3/files?q=name='${encodeURIComponent(folderName)}' and mimeType='application/vnd.google-apps.folder' and trashed=false${parentQuery}`, {
|
||||
headers: { Authorization: `Bearer ${accessToken}` },
|
||||
});
|
||||
|
||||
const searchData: GoogleDriveSearchResponse = await searchRes.json();
|
||||
|
||||
if (searchData.files && searchData.files.length > 0) {
|
||||
const folderId = searchData.files[0].id;
|
||||
await env.FOLDER_CACHE.put(cacheKey, folderId, { expirationTtl: 3600 });
|
||||
return folderId;
|
||||
}
|
||||
|
||||
// フォルダが存在しない場合は作成
|
||||
const createBody: any = {
|
||||
name: folderName,
|
||||
mimeType: "application/vnd.google-apps.folder",
|
||||
};
|
||||
|
||||
if (parentId) {
|
||||
createBody.parents = [parentId];
|
||||
}
|
||||
|
||||
const createRes = await fetch("https://www.googleapis.com/drive/v3/files", {
|
||||
method: "POST",
|
||||
headers: {
|
||||
Authorization: `Bearer ${accessToken}`,
|
||||
"Content-Type": "application/json",
|
||||
},
|
||||
body: JSON.stringify(createBody),
|
||||
});
|
||||
|
||||
const createData: any = await createRes.json();
|
||||
await env.FOLDER_CACHE.put(cacheKey, createData.id, { expirationTtl: 3600 });
|
||||
return createData.id;
|
||||
}
|
||||
|
||||
async function resolvePathToFolderAndFile(accessToken: string, bucket: string, objectKey: string, env: Env): Promise<{ parentFolderId: string; fileName: string }> {
|
||||
// バケットのルートフォルダを取得
|
||||
let currentFolderId = await getOrCreateFolder(accessToken, bucket, null, env);
|
||||
|
||||
// objectKeyを/で分割
|
||||
const parts = objectKey.split("/").filter((p) => p);
|
||||
|
||||
if (parts.length === 0) {
|
||||
throw new Error("Invalid object key");
|
||||
}
|
||||
|
||||
const fileName = parts[parts.length - 1];
|
||||
const directories = parts.slice(0, -1);
|
||||
|
||||
for (const dir of directories) {
|
||||
currentFolderId = await getOrCreateFolder(accessToken, dir, currentFolderId, env);
|
||||
}
|
||||
|
||||
return {
|
||||
parentFolderId: currentFolderId,
|
||||
fileName: fileName,
|
||||
};
|
||||
}
|
||||
|
||||
async function streamUploadToDrive(accessToken: string, stream: ReadableStream | null, bucket: string, objectKey: string, mimeType: string, env: Env): Promise<any> {
|
||||
if (!stream) {
|
||||
throw new Error("Request body is required");
|
||||
}
|
||||
|
||||
// パスを解析してフォルダ階層を作成
|
||||
const { parentFolderId, fileName } = await resolvePathToFolderAndFile(accessToken, bucket, objectKey, env);
|
||||
|
||||
// Resumable uploadの初期化
|
||||
const initRes = await fetch("https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable", {
|
||||
method: "POST",
|
||||
headers: {
|
||||
Authorization: `Bearer ${accessToken}`,
|
||||
"X-Upload-Content-Type": mimeType,
|
||||
"Content-Type": "application/json; charset=UTF-8",
|
||||
},
|
||||
body: JSON.stringify({
|
||||
name: fileName,
|
||||
parents: [parentFolderId],
|
||||
}),
|
||||
});
|
||||
|
||||
const uploadUrl = initRes.headers.get("Location");
|
||||
if (!uploadUrl) {
|
||||
console.error(initRes.status);
|
||||
console.error(await initRes.text());
|
||||
throw new Error("Failed to get upload URL");
|
||||
}
|
||||
|
||||
// ストリーミングアップロード
|
||||
const uploadRes = await fetch(uploadUrl, {
|
||||
method: "PUT",
|
||||
headers: {
|
||||
Authorization: `Bearer ${accessToken}`,
|
||||
},
|
||||
body: stream,
|
||||
duplex: "half",
|
||||
} as RequestInit);
|
||||
|
||||
if (!uploadRes.ok) {
|
||||
const errorText = await uploadRes.text();
|
||||
throw new Error(`Upload failed: ${errorText}`);
|
||||
}
|
||||
|
||||
return await uploadRes.json();
|
||||
}
|
||||
|
||||
async function findFileInFolder(accessToken: string, folderId: string, fileName: string): Promise<GoogleDriveFile | null> {
|
||||
const searchRes = await fetch(`https://www.googleapis.com/drive/v3/files?q=name='${encodeURIComponent(fileName)}' and '${folderId}' in parents and trashed=false&fields=files(id,name,mimeType,size)`, {
|
||||
headers: { Authorization: `Bearer ${accessToken}` },
|
||||
});
|
||||
|
||||
const data: GoogleDriveSearchResponse = await searchRes.json();
|
||||
return data.files && data.files.length > 0 ? data.files[0] : null;
|
||||
}
|
||||
|
||||
async function streamDownloadFromDrive(accessToken: string, bucket: string, objectKey: string, env: Env): Promise<{ body: ReadableStream; contentType: string; size: number; id: string }> {
|
||||
const { parentFolderId, fileName } = await resolvePathToFolderAndFile(accessToken, bucket, objectKey, env);
|
||||
const file = await findFileInFolder(accessToken, parentFolderId, fileName);
|
||||
|
||||
if (!file) {
|
||||
throw new Error("File not found");
|
||||
}
|
||||
|
||||
const controller = new AbortController();
|
||||
const timeout = setTimeout(() => {
|
||||
controller.abort();
|
||||
}, 5000);
|
||||
|
||||
const downloadRes = await fetch(`https://www.googleapis.com/drive/v3/files/${file.id}?alt=media`, {
|
||||
headers: { Authorization: `Bearer ${accessToken}` },
|
||||
signal: controller.signal,
|
||||
});
|
||||
|
||||
clearTimeout(timeout);
|
||||
|
||||
if (!downloadRes.ok) {
|
||||
console.error(downloadRes.status);
|
||||
console.error(await downloadRes.text());
|
||||
throw new Error("Download failed");
|
||||
}
|
||||
|
||||
return {
|
||||
body: downloadRes.body!,
|
||||
contentType: file.mimeType || "application/octet-stream",
|
||||
size: parseInt(file.size || "0"),
|
||||
id: file.id,
|
||||
};
|
||||
}
|
||||
|
||||
async function deleteFromDrive(accessToken: string, bucket: string, objectKey: string, env: Env): Promise<void> {
|
||||
const { parentFolderId, fileName } = await resolvePathToFolderAndFile(accessToken, bucket, objectKey, env);
|
||||
const file = await findFileInFolder(accessToken, parentFolderId, fileName);
|
||||
|
||||
if (!file) {
|
||||
throw new Error("File not found");
|
||||
}
|
||||
|
||||
const deleteRes = await fetch(`https://www.googleapis.com/drive/v3/files/${file.id}`, {
|
||||
method: "DELETE",
|
||||
headers: { Authorization: `Bearer ${accessToken}` },
|
||||
});
|
||||
|
||||
if (!deleteRes.ok) {
|
||||
throw new Error("Delete failed");
|
||||
}
|
||||
}
|
||||
|
||||
async function getFileMetadata(accessToken: string, bucket: string, objectKey: string, env: Env): Promise<{ id: string; mimeType: string; size: number }> {
|
||||
const { parentFolderId, fileName } = await resolvePathToFolderAndFile(accessToken, bucket, objectKey, env);
|
||||
const file = await findFileInFolder(accessToken, parentFolderId, fileName);
|
||||
|
||||
if (!file) {
|
||||
throw new Error("File not found");
|
||||
}
|
||||
|
||||
return {
|
||||
id: file.id,
|
||||
mimeType: file.mimeType || "application/octet-stream",
|
||||
size: parseInt(file.size || "0"),
|
||||
};
|
||||
}
|
||||
|
||||
async function listFiles(accessToken: string, bucket: string, env: Env): Promise<GoogleDriveFile[]> {
|
||||
const folderId = await getOrCreateFolder(accessToken, bucket, null, env);
|
||||
|
||||
const listRes = await fetch(`https://www.googleapis.com/drive/v3/files?q='${folderId}' in parents and trashed=false&fields=files(id,name,mimeType,size,modifiedTime)`, {
|
||||
headers: { Authorization: `Bearer ${accessToken}` },
|
||||
});
|
||||
|
||||
const data: GoogleDriveSearchResponse = await listRes.json();
|
||||
return data.files || [];
|
||||
}
|
||||
|
||||
function generateListBucketResult(files: any[], bucket: string): string {
|
||||
const contents = files
|
||||
.map(
|
||||
(f) => `
|
||||
<Contents>
|
||||
<Key>${escapeXml(f.name)}</Key>
|
||||
<LastModified>${f.modifiedTime || new Date().toISOString()}</LastModified>
|
||||
<ETag>"${f.id}"</ETag>
|
||||
<Size>${f.size || 0}</Size>
|
||||
<StorageClass>STANDARD</StorageClass>
|
||||
</Contents>`,
|
||||
)
|
||||
.join("");
|
||||
|
||||
return `<?xml version="1.0" encoding="UTF-8"?>
|
||||
<ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
|
||||
<Name>${escapeXml(bucket)}</Name>
|
||||
<Prefix></Prefix>
|
||||
<MaxKeys>1000</MaxKeys>
|
||||
<IsTruncated>false</IsTruncated>
|
||||
${contents}
|
||||
</ListBucketResult>`;
|
||||
}
|
||||
|
||||
function escapeXml(str: string): string {
|
||||
return str.replace(/&/g, "&").replace(/</g, "<").replace(/>/g, ">").replace(/"/g, """).replace(/'/g, "'");
|
||||
}
|
||||
|
||||
// ========================================
|
||||
// AWS Signature V4 Verification
|
||||
// ========================================
|
||||
|
||||
async function verifySignature(request: Request, env: Env): Promise<boolean> {
|
||||
const url = new URL(request.url);
|
||||
const headers = request.headers;
|
||||
|
||||
const isQueryAuth = url.searchParams.has("X-Amz-Algorithm");
|
||||
|
||||
let algorithm: string;
|
||||
if (isQueryAuth) {
|
||||
algorithm = url.searchParams.get("X-Amz-Algorithm") ?? "";
|
||||
} else {
|
||||
const authHeader = headers.get("Authorization") ?? "";
|
||||
algorithm = authHeader.split(" ")[0];
|
||||
}
|
||||
|
||||
if (!algorithm || !algorithm.includes("AWS4-HMAC-SHA256")) {
|
||||
return false;
|
||||
}
|
||||
|
||||
const datetime = (isQueryAuth ? url.searchParams.get("X-Amz-Date") : headers.get("x-amz-date")) ?? "";
|
||||
|
||||
if (!datetime) return false;
|
||||
|
||||
const date = datetime.substring(0, 8);
|
||||
|
||||
const canonicalRequest = await createCanonicalRequest(request, isQueryAuth);
|
||||
const hashedCanonicalRequest = await sha256(canonicalRequest);
|
||||
|
||||
const credentialScope = `${date}/${env.REGION}/s3/aws4_request`;
|
||||
const stringToSign = ["AWS4-HMAC-SHA256", datetime, credentialScope, hashedCanonicalRequest].join("\n");
|
||||
|
||||
const signingKey = await getSigningKey(env.SECRET_KEY, date, env.REGION, "s3");
|
||||
const signature = await hmacSha256(signingKey, stringToSign);
|
||||
const signatureHex = bufToHex(signature);
|
||||
|
||||
let expectedSignature = "";
|
||||
if (isQueryAuth) {
|
||||
expectedSignature = url.searchParams.get("X-Amz-Signature") ?? "";
|
||||
} else {
|
||||
const authHeader = headers.get("Authorization") ?? "";
|
||||
const match = authHeader.match(/Signature=([a-f0-9]+)/);
|
||||
expectedSignature = match ? match[1] : "";
|
||||
}
|
||||
|
||||
return signatureHex === expectedSignature;
|
||||
}
|
||||
|
||||
async function createCanonicalRequest(request: Request, isQueryAuth: boolean): Promise<string> {
|
||||
const url = new URL(request.url);
|
||||
|
||||
const method = request.method;
|
||||
const canonicalUri = url.pathname || "/";
|
||||
|
||||
const params = Array.from(url.searchParams.entries())
|
||||
.filter(([key]) => key !== "X-Amz-Signature")
|
||||
.sort(([a], [b]) => {
|
||||
if (a < b) return -1;
|
||||
if (a > b) return 1;
|
||||
return 0;
|
||||
})
|
||||
.map(([key, val]) => `${encodeRFC3986(key)}=${encodeRFC3986(val)}`)
|
||||
.join("&");
|
||||
|
||||
let signedHeadersList: string[];
|
||||
if (isQueryAuth) {
|
||||
signedHeadersList = (url.searchParams.get("X-Amz-SignedHeaders") ?? "host").split(";");
|
||||
} else {
|
||||
const authHeader = request.headers.get("Authorization") ?? "";
|
||||
const match = authHeader.match(/SignedHeaders=([^,\s]+)/);
|
||||
signedHeadersList = match ? match[1].split(";") : ["host"];
|
||||
}
|
||||
|
||||
const canonicalHeaders = signedHeadersList
|
||||
.map((h) => {
|
||||
const headerName = h.toLowerCase();
|
||||
let headerValue = "";
|
||||
|
||||
if (headerName === "host") {
|
||||
headerValue = url.hostname;
|
||||
const port = url.port;
|
||||
if (port && !((url.protocol === "https:" && port === "443") || (url.protocol === "http:" && port === "80"))) {
|
||||
headerValue += `:${port}`;
|
||||
}
|
||||
} else {
|
||||
headerValue = request.headers.get(headerName)?.trim() ?? "";
|
||||
}
|
||||
|
||||
return `${headerName}:${headerValue}\n`;
|
||||
})
|
||||
.join("");
|
||||
|
||||
const signedHeaders = signedHeadersList.join(";");
|
||||
const payloadHash = request.headers.get("x-amz-content-sha256") ?? (isQueryAuth ? "UNSIGNED-PAYLOAD" : "UNSIGNED-PAYLOAD");
|
||||
|
||||
return [method, canonicalUri, params, canonicalHeaders, signedHeaders, payloadHash].join("\n");
|
||||
}
|
||||
|
||||
function encodeRFC3986(str: string): string {
|
||||
return encodeURIComponent(str).replace(/[!'()*]/g, (c) => `%${c.charCodeAt(0).toString(16).toUpperCase()}`);
|
||||
}
|
||||
|
||||
async function getSigningKey(secret: string, date: string, region: string, service: string): Promise<ArrayBuffer> {
|
||||
const kDate = await hmacSha256("AWS4" + secret, date);
|
||||
const kRegion = await hmacSha256(kDate, region);
|
||||
const kService = await hmacSha256(kRegion, service);
|
||||
return await hmacSha256(kService, "aws4_request");
|
||||
}
|
||||
|
||||
async function hmacSha256(key: string | ArrayBuffer, data: string): Promise<ArrayBuffer> {
|
||||
const keyData = typeof key === "string" ? new TextEncoder().encode(key) : key;
|
||||
const cryptoKey = await crypto.subtle.importKey("raw", keyData, { name: "HMAC", hash: "SHA-256" }, false, ["sign"]);
|
||||
return await crypto.subtle.sign("HMAC", cryptoKey, new TextEncoder().encode(data));
|
||||
}
|
||||
|
||||
async function sha256(data: string): Promise<string> {
|
||||
const hash = await crypto.subtle.digest("SHA-256", new TextEncoder().encode(data));
|
||||
return bufToHex(hash);
|
||||
}
|
||||
|
||||
function bufToHex(buf: ArrayBuffer): string {
|
||||
return Array.from(new Uint8Array(buf))
|
||||
.map((b) => b.toString(16).padStart(2, "0"))
|
||||
.join("");
|
||||
}
|
||||
|
||||
@@ -0,0 +1,282 @@
|
||||
import { alignedSendLen, cancelSession, createEmptyFile, putFinalChunk, queryStatus } from "./drive-resumable";
|
||||
import { getAccessToken } from "./google-drive";
|
||||
import type { DriveUploadResult, Env } from "./types";
|
||||
|
||||
import { DurableObject } from "cloudflare:workers";
|
||||
|
||||
const WAIT_TIMEOUT_MS = 20_000;
|
||||
const LEASE_MS = 120_000;
|
||||
const EXPIRE_AFTER_MS = 24 * 60 * 60 * 1000;
|
||||
|
||||
interface PartRow extends Record<string, SqlStorageValue> {
|
||||
partNumber: number;
|
||||
size: number;
|
||||
etag: string;
|
||||
endOffset: number;
|
||||
ts: number;
|
||||
}
|
||||
|
||||
interface InFlight {
|
||||
requestId: string;
|
||||
partNumber: number;
|
||||
driveOffsetAtStart: number;
|
||||
carryLen: number;
|
||||
partLen: number;
|
||||
sendLen: number;
|
||||
leaseExpiresAt: number;
|
||||
}
|
||||
|
||||
export type BeginPartResult = { kind: "admit"; uploadUrl: string; driveOffset: number; carry: Uint8Array; sendLen: number; skipBytes: number } | { kind: "committed"; etag: string } | { kind: "slowdown" } | { kind: "error"; code: "NoSuchUpload" | "InvalidPart" | "InternalError"; message: string };
|
||||
|
||||
export type CompleteResult = { kind: "complete"; metadata: DriveUploadResult; partEtags: string[] } | { kind: "error"; code: "NoSuchUpload" | "InvalidPart" | "InvalidPartOrder" | "InternalError"; message: string };
|
||||
|
||||
interface Waiter {
|
||||
requestId: string;
|
||||
partNumber: number;
|
||||
partLen: number;
|
||||
resolve: (result: BeginPartResult) => void;
|
||||
timer: ReturnType<typeof setTimeout>;
|
||||
}
|
||||
|
||||
interface StateValueRow extends Record<string, SqlStorageValue> {
|
||||
v: ArrayBuffer | string | number | null;
|
||||
}
|
||||
|
||||
export class MultipartUploadDO extends DurableObject<Env> {
|
||||
private readonly waiters = new Map<string, Waiter>();
|
||||
|
||||
constructor(ctx: DurableObjectState, env: Env) {
|
||||
super(ctx, env);
|
||||
void ctx.blockConcurrencyWhile(async () => {
|
||||
this.ctx.storage.sql.exec("CREATE TABLE IF NOT EXISTS state (k TEXT PRIMARY KEY, v)");
|
||||
this.ctx.storage.sql.exec("CREATE TABLE IF NOT EXISTS parts (partNumber INTEGER PRIMARY KEY, size INTEGER NOT NULL, etag TEXT NOT NULL, endOffset INTEGER NOT NULL, ts INTEGER NOT NULL)");
|
||||
});
|
||||
}
|
||||
|
||||
private getValue<T extends ArrayBuffer | string | number>(key: string): T | undefined {
|
||||
return this.ctx.storage.sql.exec<StateValueRow>("SELECT v FROM state WHERE k = ?", key).toArray()[0]?.v as T | undefined;
|
||||
}
|
||||
|
||||
private setValue(key: string, value: ArrayBuffer | string | number | null): void {
|
||||
this.ctx.storage.sql.exec("INSERT INTO state (k, v) VALUES (?, ?) ON CONFLICT(k) DO UPDATE SET v = excluded.v", key, value);
|
||||
}
|
||||
|
||||
private hasUpload(): boolean {
|
||||
return this.getValue<string>("uploadUrl") !== undefined;
|
||||
}
|
||||
|
||||
private carry(): Uint8Array {
|
||||
const value = this.getValue<ArrayBuffer>("carry");
|
||||
return value ? new Uint8Array(value) : new Uint8Array();
|
||||
}
|
||||
|
||||
private inFlight(): InFlight | null {
|
||||
const value = this.getValue<string>("inFlight");
|
||||
return value ? (JSON.parse(value) as InFlight) : null;
|
||||
}
|
||||
|
||||
private part(partNumber: number): PartRow | undefined {
|
||||
return this.ctx.storage.sql.exec<PartRow>("SELECT partNumber, size, etag, endOffset, ts FROM parts WHERE partNumber = ?", partNumber).toArray()[0];
|
||||
}
|
||||
|
||||
async init(input: { uploadUrl: string; bucket: string; key: string; mimeType: string; parentFolderId: string; fileName: string; existingFileId?: string }): Promise<boolean> {
|
||||
if (this.hasUpload()) return false;
|
||||
this.ctx.storage.sql.exec("DELETE FROM parts");
|
||||
for (const [key, value] of Object.entries(input)) {
|
||||
if (value !== undefined) this.setValue(key, value);
|
||||
}
|
||||
this.setValue("driveOffset", 0);
|
||||
this.setValue("carry", new ArrayBuffer(0));
|
||||
this.setValue("nextExpectedPart", 1);
|
||||
this.setValue("createdAt", Date.now());
|
||||
this.setValue("inFlight", null);
|
||||
await this.ctx.storage.setAlarm(Date.now() + EXPIRE_AFTER_MS);
|
||||
return true;
|
||||
}
|
||||
|
||||
private async resyncExpiredLease(inFlight: InFlight, requestId: string, partLen: number): Promise<BeginPartResult | null> {
|
||||
if (partLen !== inFlight.partLen) return { kind: "error", code: "InvalidPart", message: "A retried part must have the same decoded length" };
|
||||
const accessToken = await getAccessToken(this.env);
|
||||
const actualOffset = await queryStatus(this.getValue<string>("uploadUrl")!, accessToken);
|
||||
const partStartFileOffset = inFlight.driveOffsetAtStart + inFlight.carryLen;
|
||||
let skipBytes = 0;
|
||||
if (actualOffset === inFlight.driveOffsetAtStart) {
|
||||
// The persisted carry remains valid.
|
||||
} else if (actualOffset >= partStartFileOffset) {
|
||||
skipBytes = actualOffset - partStartFileOffset;
|
||||
if (skipBytes > inFlight.partLen) return { kind: "error", code: "InternalError", message: "Drive committed beyond the leased part" };
|
||||
this.setValue("driveOffset", actualOffset);
|
||||
this.setValue("carry", new ArrayBuffer(0));
|
||||
} else {
|
||||
return { kind: "error", code: "InternalError", message: "Drive committed only a prefix of the multipart carry" };
|
||||
}
|
||||
this.setValue("inFlight", null);
|
||||
return this.admit(requestId, inFlight.partNumber, inFlight.partLen, skipBytes);
|
||||
}
|
||||
|
||||
private admit(requestId: string, partNumber: number, partLen: number, skipBytes = 0): BeginPartResult {
|
||||
const carry = this.carry();
|
||||
const driveOffset = this.getValue<number>("driveOffset") ?? 0;
|
||||
const available = carry.byteLength + partLen - skipBytes;
|
||||
const sendLen = alignedSendLen(driveOffset, available);
|
||||
const inFlight: InFlight = {
|
||||
requestId,
|
||||
partNumber,
|
||||
driveOffsetAtStart: driveOffset,
|
||||
carryLen: carry.byteLength,
|
||||
partLen,
|
||||
sendLen,
|
||||
leaseExpiresAt: Date.now() + LEASE_MS,
|
||||
};
|
||||
this.setValue("inFlight", JSON.stringify(inFlight));
|
||||
return { kind: "admit", uploadUrl: this.getValue<string>("uploadUrl")!, driveOffset, carry, sendLen, skipBytes };
|
||||
}
|
||||
|
||||
async beginPart(requestId: string, partNumber: number, partLen: number): Promise<BeginPartResult> {
|
||||
if (!this.hasUpload()) return { kind: "error", code: "NoSuchUpload", message: "Multipart upload not found" };
|
||||
if (!Number.isInteger(partNumber) || partNumber < 1 || partNumber > 10_000 || !Number.isSafeInteger(partLen) || partLen < 0) {
|
||||
return { kind: "error", code: "InvalidPart", message: "Invalid part number or length" };
|
||||
}
|
||||
const committed = this.part(partNumber);
|
||||
if (committed) return { kind: "committed", etag: committed.etag };
|
||||
|
||||
const nextExpected = this.getValue<number>("nextExpectedPart") ?? 1;
|
||||
if (partNumber < nextExpected) return { kind: "error", code: "InvalidPart", message: "Part is no longer available" };
|
||||
if (partNumber > nextExpected + 64) return { kind: "slowdown" };
|
||||
|
||||
const lease = this.inFlight();
|
||||
if (partNumber === nextExpected && (!lease || lease.leaseExpiresAt <= Date.now())) {
|
||||
if (lease) {
|
||||
try {
|
||||
const result = await this.resyncExpiredLease(lease, requestId, partLen);
|
||||
if (result) return result;
|
||||
} catch (error) {
|
||||
return { kind: "error", code: "InternalError", message: error instanceof Error ? error.message : String(error) };
|
||||
}
|
||||
}
|
||||
return this.admit(requestId, partNumber, partLen);
|
||||
}
|
||||
|
||||
return await new Promise<BeginPartResult>((resolve) => {
|
||||
const timer = setTimeout(() => {
|
||||
this.waiters.delete(requestId);
|
||||
resolve({ kind: "slowdown" });
|
||||
}, WAIT_TIMEOUT_MS);
|
||||
this.waiters.set(requestId, { requestId, partNumber, partLen, resolve, timer });
|
||||
});
|
||||
}
|
||||
|
||||
async cancelWaiter(requestId: string): Promise<void> {
|
||||
const waiter = this.waiters.get(requestId);
|
||||
if (!waiter) return;
|
||||
clearTimeout(waiter.timer);
|
||||
this.waiters.delete(requestId);
|
||||
waiter.resolve({ kind: "slowdown" });
|
||||
}
|
||||
|
||||
async failPart(partNumber: number): Promise<void> {
|
||||
const lease = this.inFlight();
|
||||
if (!lease || lease.partNumber !== partNumber) return;
|
||||
lease.leaseExpiresAt = 0;
|
||||
this.setValue("inFlight", JSON.stringify(lease));
|
||||
await this.wakeWaiters();
|
||||
}
|
||||
|
||||
async endPart(partNumber: number, newDriveOffset: number, tail: Uint8Array, etag: string, partLen: number): Promise<boolean> {
|
||||
const lease = this.inFlight();
|
||||
if (!lease || lease.partNumber !== partNumber) return false;
|
||||
if (newDriveOffset !== lease.driveOffsetAtStart + lease.sendLen || tail.byteLength > 256 * 1024) return false;
|
||||
const tailBuffer = new Uint8Array(tail).buffer;
|
||||
this.ctx.storage.transactionSync(() => {
|
||||
this.setValue("driveOffset", newDriveOffset);
|
||||
this.setValue("carry", tailBuffer);
|
||||
this.setValue("nextExpectedPart", partNumber + 1);
|
||||
this.setValue("inFlight", null);
|
||||
this.ctx.storage.sql.exec("INSERT INTO parts (partNumber, size, etag, endOffset, ts) VALUES (?, ?, ?, ?, ?)", partNumber, partLen, etag, newDriveOffset + tail.byteLength, Date.now());
|
||||
});
|
||||
await this.wakeWaiters();
|
||||
return true;
|
||||
}
|
||||
|
||||
private async wakeWaiters(): Promise<void> {
|
||||
const nextExpected = this.getValue<number>("nextExpectedPart") ?? 1;
|
||||
if (this.inFlight()) return;
|
||||
const waiter = [...this.waiters.values()].find((candidate) => candidate.partNumber === nextExpected);
|
||||
if (!waiter) return;
|
||||
clearTimeout(waiter.timer);
|
||||
this.waiters.delete(waiter.requestId);
|
||||
waiter.resolve(this.admit(waiter.requestId, waiter.partNumber, waiter.partLen));
|
||||
}
|
||||
|
||||
async complete(clientParts: Array<{ partNumber: number; etag: string }>, expectedTotal?: number): Promise<CompleteResult> {
|
||||
if (!this.hasUpload()) return { kind: "error", code: "NoSuchUpload", message: "Multipart upload not found" };
|
||||
if (this.inFlight()) return { kind: "error", code: "InvalidPart", message: "A part is still being uploaded" };
|
||||
const stored = this.ctx.storage.sql.exec<PartRow>("SELECT partNumber, size, etag, endOffset, ts FROM parts ORDER BY partNumber").toArray();
|
||||
if (clientParts.length !== stored.length) return { kind: "error", code: "InvalidPart", message: "The completed part list does not match uploaded parts" };
|
||||
for (let index = 0; index < clientParts.length; index++) {
|
||||
const client = clientParts[index];
|
||||
const part = stored[index];
|
||||
if (client.partNumber !== index + 1) return { kind: "error", code: "InvalidPartOrder", message: "Parts must be consecutive starting at 1" };
|
||||
if (part.partNumber !== client.partNumber || part.etag !== client.etag) return { kind: "error", code: "InvalidPart", message: `Part ${client.partNumber} does not match` };
|
||||
}
|
||||
|
||||
const driveOffset = this.getValue<number>("driveOffset") ?? 0;
|
||||
const carry = this.carry();
|
||||
const total = driveOffset + carry.byteLength;
|
||||
if (expectedTotal !== undefined && expectedTotal !== total) return { kind: "error", code: "InvalidPart", message: "x-amz-mp-object-size does not match uploaded parts" };
|
||||
|
||||
try {
|
||||
const accessToken = await getAccessToken(this.env);
|
||||
let metadata: DriveUploadResult;
|
||||
if (total === 0) {
|
||||
await cancelSession(this.getValue<string>("uploadUrl")!, accessToken);
|
||||
metadata = await createEmptyFile(accessToken, {
|
||||
name: this.getValue<string>("fileName")!,
|
||||
parents: [this.getValue<string>("parentFolderId")!],
|
||||
mimeType: this.getValue<string>("mimeType")!,
|
||||
existingFileId: this.getValue<string>("existingFileId"),
|
||||
});
|
||||
} else {
|
||||
metadata = await putFinalChunk(this.getValue<string>("uploadUrl")!, accessToken, driveOffset, total, carry);
|
||||
}
|
||||
const partEtags = stored.map((part) => part.etag);
|
||||
await this.ctx.storage.deleteAlarm();
|
||||
await this.ctx.storage.deleteAll();
|
||||
return { kind: "complete", metadata, partEtags };
|
||||
} catch (error) {
|
||||
return { kind: "error", code: "InternalError", message: error instanceof Error ? error.message : String(error) };
|
||||
}
|
||||
}
|
||||
|
||||
async listParts(marker: number, maxParts: number): Promise<{ parts: PartRow[]; nextMarker: number; truncated: boolean } | null> {
|
||||
if (!this.hasUpload()) return null;
|
||||
const rows = this.ctx.storage.sql.exec<PartRow>("SELECT partNumber, size, etag, endOffset, ts FROM parts WHERE partNumber > ? ORDER BY partNumber LIMIT ?", marker, maxParts + 1).toArray();
|
||||
const truncated = rows.length > maxParts;
|
||||
const parts = rows.slice(0, maxParts);
|
||||
return { parts, nextMarker: parts.at(-1)?.partNumber ?? marker, truncated };
|
||||
}
|
||||
|
||||
async abort(): Promise<boolean> {
|
||||
if (!this.hasUpload()) return false;
|
||||
const accessToken = await getAccessToken(this.env);
|
||||
await cancelSession(this.getValue<string>("uploadUrl")!, accessToken);
|
||||
await this.ctx.storage.deleteAlarm();
|
||||
await this.ctx.storage.deleteAll();
|
||||
for (const waiter of this.waiters.values()) {
|
||||
clearTimeout(waiter.timer);
|
||||
waiter.resolve({ kind: "error", code: "NoSuchUpload", message: "Multipart upload was aborted" });
|
||||
}
|
||||
this.waiters.clear();
|
||||
return true;
|
||||
}
|
||||
|
||||
async alarm(): Promise<void> {
|
||||
if (!this.hasUpload()) return;
|
||||
try {
|
||||
await this.abort();
|
||||
} catch (error) {
|
||||
console.error(JSON.stringify({ message: "multipart cleanup failed", error: error instanceof Error ? error.message : String(error) }));
|
||||
await this.ctx.storage.setAlarm(Date.now() + 60 * 60 * 1000);
|
||||
}
|
||||
}
|
||||
}
|
||||
+237
@@ -0,0 +1,237 @@
|
||||
import { decodedContentLength, isAwsChunked, pumpBody } from "./aws-chunked";
|
||||
import { createSession, nextDriveOffset } from "./drive-resumable";
|
||||
import { deleteFromDrive, findFileInFolder, getFileMetadata, listFiles, resolvePathToFolderAndFile, streamDownloadFromDrive, streamUploadToDrive } from "./google-drive";
|
||||
import { S3Exception, s3Error } from "./s3-errors";
|
||||
import { completeMultipartUploadResult, generateListBucketResult, initiateMultipartUploadResult, listMultipartUploadsResult, listPartsResult, parseCompleteMultipartUpload } from "./s3-xml";
|
||||
import type { DriveUploadResult, Env } from "./types";
|
||||
|
||||
const MAX_COMPLETE_XML = 4 * 1024 * 1024;
|
||||
|
||||
function etag(file: { id: string; md5Checksum?: string }): string {
|
||||
return file.md5Checksum || file.id;
|
||||
}
|
||||
|
||||
function xmlResponse(body: string, status = 200): Response {
|
||||
return new Response(body, { status, headers: { "Content-Type": "application/xml" } });
|
||||
}
|
||||
|
||||
function multipartStub(env: Env, uploadId: string) {
|
||||
return env.MPU.getByName(uploadId);
|
||||
}
|
||||
|
||||
function encodeUploadId(bucket: string, key: string): string {
|
||||
const bytes = crypto.getRandomValues(new Uint8Array(16));
|
||||
const random = btoa(String.fromCharCode(...bytes))
|
||||
.replace(/\+/g, "-")
|
||||
.replace(/\//g, "_")
|
||||
.replace(/=+$/, "");
|
||||
return `${random}.${encodeURIComponent(bucket)}.${encodeURIComponent(key)}`;
|
||||
}
|
||||
|
||||
function uploadIdMatches(uploadId: string, bucket: string, key: string): boolean {
|
||||
const parts = uploadId.split(".");
|
||||
if (parts.length < 3) return false;
|
||||
try {
|
||||
return decodeURIComponent(parts[1]) === bucket && decodeURIComponent(parts.slice(2).join(".")) === key;
|
||||
} catch {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
function parsePositiveInt(value: string | null, fallback?: number): number | undefined {
|
||||
if (value === null) return fallback;
|
||||
if (!/^\d+$/.test(value)) return undefined;
|
||||
const number = Number(value);
|
||||
return Number.isSafeInteger(number) ? number : undefined;
|
||||
}
|
||||
|
||||
async function drainBody(body: ReadableStream | null): Promise<void> {
|
||||
if (body) await body.pipeTo(new WritableStream());
|
||||
}
|
||||
|
||||
async function partEtag(uploadId: string, partNumber: number, partLen: number, fileOffset: number): Promise<string> {
|
||||
const value = new TextEncoder().encode(`${uploadId}:${partNumber}:${partLen}:${fileOffset}`);
|
||||
const digest = new Uint8Array(await crypto.subtle.digest("SHA-256", value)).subarray(0, 16);
|
||||
return Array.from(digest, (byte) => byte.toString(16).padStart(2, "0")).join("");
|
||||
}
|
||||
|
||||
async function multipartObjectEtag(metadata: DriveUploadResult, partEtags: string[], style: Env["ETAG_STYLE"]): Promise<string> {
|
||||
if (style !== "multipart" || partEtags.length === 0) return etag(metadata);
|
||||
const bytes = new Uint8Array(partEtags.length * 16);
|
||||
for (let index = 0; index < partEtags.length; index++) {
|
||||
const value = partEtags[index];
|
||||
for (let byte = 0; byte < 16; byte++) bytes[index * 16 + byte] = Number.parseInt(value.slice(byte * 2, byte * 2 + 2), 16);
|
||||
}
|
||||
const digest = await crypto.subtle.digest("MD5", bytes);
|
||||
return `${Array.from(new Uint8Array(digest), (byte) => byte.toString(16).padStart(2, "0")).join("")}-${partEtags.length}`;
|
||||
}
|
||||
|
||||
async function createMultipart(request: Request, env: Env, accessToken: string, bucket: string, key: string): Promise<Response> {
|
||||
if (env.ALLOW_MULTIPART !== "true") return s3Error("NotImplemented", 501, undefined, `/${bucket}/${key}`);
|
||||
const mimeType = request.headers.get("Content-Type") || "application/octet-stream";
|
||||
const { parentFolderId, fileName } = await resolvePathToFolderAndFile(accessToken, bucket, key, env);
|
||||
const existing = await findFileInFolder(accessToken, parentFolderId, fileName);
|
||||
const uploadUrl = await createSession(accessToken, { name: fileName, parents: [parentFolderId], mimeType, existingFileId: existing?.id });
|
||||
const uploadId = encodeUploadId(bucket, key);
|
||||
const initialized = await multipartStub(env, uploadId).init({ uploadUrl, bucket, key, mimeType, parentFolderId, fileName, existingFileId: existing?.id });
|
||||
if (!initialized) throw new Error("Failed to initialize multipart state");
|
||||
return xmlResponse(initiateMultipartUploadResult(bucket, key, uploadId));
|
||||
}
|
||||
|
||||
async function uploadPart(request: Request, env: Env, accessToken: string, bucket: string, key: string, url: URL): Promise<Response> {
|
||||
const uploadId = url.searchParams.get("uploadId") ?? "";
|
||||
const partNumber = parsePositiveInt(url.searchParams.get("partNumber"));
|
||||
if (!uploadIdMatches(uploadId, bucket, key)) return s3Error("NoSuchUpload", 404, undefined, `/${bucket}/${key}`);
|
||||
if (!partNumber || partNumber > 10_000) return s3Error("InvalidArgument", 400, "partNumber must be between 1 and 10000", `/${bucket}/${key}`);
|
||||
if (request.headers.has("x-amz-copy-source")) return s3Error("NotImplemented", 501, undefined, `/${bucket}/${key}`);
|
||||
const length = decodedContentLength(request);
|
||||
if (length === undefined) return s3Error("InvalidArgument", 400, "Content-Length or x-amz-decoded-content-length is required", `/${bucket}/${key}`);
|
||||
|
||||
const stub = multipartStub(env, uploadId);
|
||||
const requestId = crypto.randomUUID();
|
||||
const onAbort = () => void stub.cancelWaiter(requestId);
|
||||
request.signal.addEventListener("abort", onAbort, { once: true });
|
||||
const lease = await stub.beginPart(requestId, partNumber, length);
|
||||
request.signal.removeEventListener("abort", onAbort);
|
||||
if (lease.kind === "slowdown") return s3Error("SlowDown", 503, undefined, `/${bucket}/${key}`, false, { "Retry-After": "1" });
|
||||
if (lease.kind === "error") return s3Error(lease.code, lease.code === "NoSuchUpload" ? 404 : 500, lease.message, `/${bucket}/${key}`);
|
||||
if (lease.kind === "committed") {
|
||||
await drainBody(request.body);
|
||||
return new Response(null, { status: 200, headers: { ETag: `"${lease.etag}"` } });
|
||||
}
|
||||
|
||||
try {
|
||||
const fixed = lease.sendLen === 0 ? null : new FixedLengthStream(lease.sendLen, { highWaterMark: 1 << 20 });
|
||||
const drivePromise = fixed
|
||||
? fetch(lease.uploadUrl, {
|
||||
method: "PUT",
|
||||
headers: {
|
||||
Authorization: `Bearer ${accessToken}`,
|
||||
"Content-Length": lease.sendLen.toString(),
|
||||
"Content-Range": `bytes ${lease.driveOffset}-${lease.driveOffset + lease.sendLen - 1}/*`,
|
||||
},
|
||||
body: fixed.readable,
|
||||
duplex: "half",
|
||||
} as RequestInit)
|
||||
: null;
|
||||
const sink = fixed?.writable ?? new WritableStream<ArrayBuffer | ArrayBufferView>();
|
||||
const pumped = await pumpBody(request.body, sink.getWriter(), {
|
||||
awsChunked: isAwsChunked(request),
|
||||
expectedLength: length,
|
||||
skipBytes: lease.skipBytes,
|
||||
maxBytes: lease.sendLen,
|
||||
prefix: lease.carry,
|
||||
});
|
||||
const driveResponse = drivePromise ? await drivePromise : null;
|
||||
if (driveResponse && driveResponse.status !== 308) throw new Error(`Drive part upload returned ${driveResponse.status}: ${await driveResponse.text()}`);
|
||||
const newOffset = driveResponse ? nextDriveOffset(driveResponse) : lease.driveOffset;
|
||||
const value = await partEtag(uploadId, partNumber, length, lease.driveOffset + lease.carry.byteLength);
|
||||
if (!(await stub.endPart(partNumber, newOffset, pumped.tail, value, length))) throw new Error("Multipart lease was lost before commit");
|
||||
return new Response(null, { status: 200, headers: { ETag: `"${value}"` } });
|
||||
} catch (error) {
|
||||
await stub.failPart(partNumber);
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
|
||||
async function completeMultipart(request: Request, env: Env, bucket: string, key: string, url: URL): Promise<Response> {
|
||||
const uploadId = url.searchParams.get("uploadId") ?? "";
|
||||
if (!uploadIdMatches(uploadId, bucket, key)) return s3Error("NoSuchUpload", 404, undefined, `/${bucket}/${key}`);
|
||||
const contentLength = parsePositiveInt(request.headers.get("Content-Length"));
|
||||
if (contentLength !== undefined && contentLength > MAX_COMPLETE_XML) return s3Error("EntityTooLarge", 400, "Completion XML exceeds 4 MiB", `/${bucket}/${key}`);
|
||||
const text = await request.text();
|
||||
if (text.length > MAX_COMPLETE_XML) return s3Error("EntityTooLarge", 400, "Completion XML exceeds 4 MiB", `/${bucket}/${key}`);
|
||||
let parts: Array<{ partNumber: number; etag: string }>;
|
||||
try {
|
||||
parts = parseCompleteMultipartUpload(text);
|
||||
} catch {
|
||||
return s3Error("MalformedXML", 400, undefined, `/${bucket}/${key}`);
|
||||
}
|
||||
const expectedTotal = parsePositiveInt(request.headers.get("x-amz-mp-object-size"));
|
||||
const result = await multipartStub(env, uploadId).complete(parts, expectedTotal);
|
||||
if (result.kind === "error") return s3Error(result.code, result.code === "NoSuchUpload" ? 404 : 400, result.message, `/${bucket}/${key}`);
|
||||
const value = await multipartObjectEtag(result.metadata, result.partEtags, env.ETAG_STYLE);
|
||||
return xmlResponse(completeMultipartUploadResult(bucket, key, value));
|
||||
}
|
||||
|
||||
async function abortMultipart(env: Env, bucket: string, key: string, url: URL): Promise<Response> {
|
||||
const uploadId = url.searchParams.get("uploadId") ?? "";
|
||||
if (!uploadIdMatches(uploadId, bucket, key) || !(await multipartStub(env, uploadId).abort())) return s3Error("NoSuchUpload", 404, undefined, `/${bucket}/${key}`);
|
||||
return new Response(null, { status: 204 });
|
||||
}
|
||||
|
||||
async function listParts(env: Env, bucket: string, key: string, url: URL): Promise<Response> {
|
||||
const uploadId = url.searchParams.get("uploadId") ?? "";
|
||||
if (!uploadIdMatches(uploadId, bucket, key)) return s3Error("NoSuchUpload", 404, undefined, `/${bucket}/${key}`);
|
||||
const marker = parsePositiveInt(url.searchParams.get("part-number-marker"), 0);
|
||||
const maxParts = parsePositiveInt(url.searchParams.get("max-parts"), 1000);
|
||||
if (marker === undefined || maxParts === undefined || maxParts > 1000) return s3Error("InvalidArgument", 400, undefined, `/${bucket}/${key}`);
|
||||
const result = await multipartStub(env, uploadId).listParts(marker, maxParts);
|
||||
if (!result) return s3Error("NoSuchUpload", 404, undefined, `/${bucket}/${key}`);
|
||||
return xmlResponse(listPartsResult(bucket, key, uploadId, result));
|
||||
}
|
||||
|
||||
async function putObject(request: Request, env: Env, accessToken: string, bucket: string, key: string): Promise<Response> {
|
||||
if (request.headers.has("x-amz-copy-source")) return s3Error("NotImplemented", 501, undefined, `/${bucket}/${key}`);
|
||||
const result = await streamUploadToDrive(accessToken, request, bucket, key, request.headers.get("Content-Type") || "application/octet-stream", env);
|
||||
return new Response(null, { status: 200, headers: { ETag: `"${etag(result)}"` } });
|
||||
}
|
||||
|
||||
export async function dispatch(request: Request, env: Env, accessToken: string, bucket: string, key: string): Promise<Response> {
|
||||
const url = new URL(request.url);
|
||||
const method = request.method;
|
||||
const resource = `/${bucket}${key ? `/${key}` : ""}`;
|
||||
|
||||
if (method === "POST" && key && url.searchParams.has("uploads")) return createMultipart(request, env, accessToken, bucket, key);
|
||||
if (method === "PUT" && key && url.searchParams.has("uploadId") && url.searchParams.has("partNumber")) return uploadPart(request, env, accessToken, bucket, key, url);
|
||||
if (method === "POST" && key && url.searchParams.has("uploadId")) return completeMultipart(request, env, bucket, key, url);
|
||||
if (method === "DELETE" && key && url.searchParams.has("uploadId")) return abortMultipart(env, bucket, key, url);
|
||||
if (method === "GET" && key && url.searchParams.has("uploadId")) return listParts(env, bucket, key, url);
|
||||
if (method === "GET" && !key && url.searchParams.has("uploads")) return xmlResponse(listMultipartUploadsResult(bucket));
|
||||
if (method === "PUT" && key) return putObject(request, env, accessToken, bucket, key);
|
||||
|
||||
if (method === "GET") {
|
||||
if (!key) return xmlResponse(generateListBucketResult(await listFiles(accessToken, bucket, env), bucket));
|
||||
try {
|
||||
const file = await streamDownloadFromDrive(accessToken, bucket, key, env, request.headers.get("Range") ?? undefined);
|
||||
const headers = new Headers({
|
||||
"Content-Type": file.contentType,
|
||||
"Content-Length": file.contentLength ?? file.size.toString(),
|
||||
"Cache-Control": "s-maxage=300, no-store",
|
||||
"Accept-Ranges": "bytes",
|
||||
ETag: `"${etag(file)}"`,
|
||||
});
|
||||
if (file.contentRange) headers.set("Content-Range", file.contentRange);
|
||||
return new Response(file.body, { status: file.status, headers });
|
||||
} catch (error) {
|
||||
if (error instanceof Error && error.message === "File not found") return s3Error("NoSuchKey", 404, undefined, resource);
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
|
||||
if (method === "HEAD") {
|
||||
if (!key) return new Response(null, { status: 200 });
|
||||
try {
|
||||
const metadata = await getFileMetadata(accessToken, bucket, key, env);
|
||||
return new Response(null, {
|
||||
status: 200,
|
||||
headers: { "Content-Type": metadata.mimeType, "Content-Length": metadata.size.toString(), "Accept-Ranges": "bytes", ETag: `"${etag(metadata)}"` },
|
||||
});
|
||||
} catch (error) {
|
||||
if (error instanceof Error && error.message === "File not found") return s3Error("NoSuchKey", 404, undefined, resource, true);
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
|
||||
if (method === "DELETE" && key) {
|
||||
try {
|
||||
await deleteFromDrive(accessToken, bucket, key, env);
|
||||
return new Response(null, { status: 204 });
|
||||
} catch (error) {
|
||||
if (error instanceof Error && error.message === "File not found") return s3Error("NoSuchKey", 404, undefined, resource);
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
|
||||
throw new S3Exception("MethodNotAllowed", 405);
|
||||
}
|
||||
@@ -0,0 +1,39 @@
|
||||
import { escapeXml } from "./s3-xml";
|
||||
|
||||
export type S3ErrorCode = "AccessDenied" | "SignatureDoesNotMatch" | "NoSuchKey" | "NoSuchUpload" | "InvalidPart" | "InvalidPartOrder" | "EntityTooLarge" | "MalformedXML" | "InvalidArgument" | "MethodNotAllowed" | "NotImplemented" | "SlowDown" | "InternalError";
|
||||
|
||||
const DEFAULT_MESSAGES: Record<S3ErrorCode, string> = {
|
||||
AccessDenied: "Access Denied",
|
||||
SignatureDoesNotMatch: "The request signature we calculated does not match the signature you provided.",
|
||||
NoSuchKey: "The specified key does not exist.",
|
||||
NoSuchUpload: "The specified multipart upload does not exist.",
|
||||
InvalidPart: "One or more of the specified parts could not be found.",
|
||||
InvalidPartOrder: "The list of parts was not in ascending order.",
|
||||
EntityTooLarge: "Your proposed upload exceeds the maximum allowed object size.",
|
||||
MalformedXML: "The XML you provided was not well-formed or did not validate against our published schema.",
|
||||
InvalidArgument: "Invalid argument.",
|
||||
MethodNotAllowed: "The specified method is not allowed against this resource.",
|
||||
NotImplemented: "A header you provided implies functionality that is not implemented.",
|
||||
SlowDown: "Please reduce your request rate.",
|
||||
InternalError: "We encountered an internal error. Please try again.",
|
||||
};
|
||||
|
||||
export class S3Exception extends Error {
|
||||
constructor(
|
||||
readonly code: S3ErrorCode,
|
||||
readonly status: number,
|
||||
message = DEFAULT_MESSAGES[code],
|
||||
readonly headers?: HeadersInit,
|
||||
) {
|
||||
super(message);
|
||||
}
|
||||
}
|
||||
|
||||
export function s3Error(code: S3ErrorCode, status: number, message = DEFAULT_MESSAGES[code], resource?: string, head = false, headers?: HeadersInit): Response {
|
||||
const requestId = crypto.randomUUID();
|
||||
const body = head ? null : `<?xml version="1.0" encoding="UTF-8"?>\n<Error><Code>${code}</Code><Message>${escapeXml(message)}</Message>${resource ? `<Resource>${escapeXml(resource)}</Resource>` : ""}<RequestId>${requestId}</RequestId></Error>`;
|
||||
const responseHeaders = new Headers(headers);
|
||||
responseHeaders.set("Content-Type", "application/xml");
|
||||
responseHeaders.set("x-amz-request-id", requestId);
|
||||
return new Response(body, { status, headers: responseHeaders });
|
||||
}
|
||||
@@ -0,0 +1,66 @@
|
||||
import type { GoogleDriveFile } from "./types";
|
||||
|
||||
export function escapeXml(str: string): string {
|
||||
return str.replace(/&/g, "&").replace(/</g, "<").replace(/>/g, ">").replace(/"/g, """).replace(/'/g, "'");
|
||||
}
|
||||
|
||||
export function generateListBucketResult(files: GoogleDriveFile[], bucket: string): string {
|
||||
const contents = files
|
||||
.map(
|
||||
(f) => `
|
||||
<Contents>
|
||||
<Key>${escapeXml(f.name)}</Key>
|
||||
<LastModified>${f.modifiedTime || new Date().toISOString()}</LastModified>
|
||||
<ETag>"${f.md5Checksum || f.id}"</ETag>
|
||||
<Size>${f.size || 0}</Size>
|
||||
<StorageClass>STANDARD</StorageClass>
|
||||
</Contents>`,
|
||||
)
|
||||
.join("");
|
||||
|
||||
return `<?xml version="1.0" encoding="UTF-8"?>
|
||||
<ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
|
||||
<Name>${escapeXml(bucket)}</Name>
|
||||
<Prefix></Prefix>
|
||||
<MaxKeys>1000</MaxKeys>
|
||||
<IsTruncated>false</IsTruncated>
|
||||
${contents}
|
||||
</ListBucketResult>`;
|
||||
}
|
||||
|
||||
export function initiateMultipartUploadResult(bucket: string, key: string, uploadId: string): string {
|
||||
return `<?xml version="1.0" encoding="UTF-8"?>
|
||||
<InitiateMultipartUploadResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><Bucket>${escapeXml(bucket)}</Bucket><Key>${escapeXml(key)}</Key><UploadId>${escapeXml(uploadId)}</UploadId></InitiateMultipartUploadResult>`;
|
||||
}
|
||||
|
||||
export function completeMultipartUploadResult(bucket: string, key: string, etag: string): string {
|
||||
return `<?xml version="1.0" encoding="UTF-8"?>
|
||||
<CompleteMultipartUploadResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><Location>/${escapeXml(bucket)}/${escapeXml(key)}</Location><Bucket>${escapeXml(bucket)}</Bucket><Key>${escapeXml(key)}</Key><ETag>"${escapeXml(etag)}"</ETag></CompleteMultipartUploadResult>`;
|
||||
}
|
||||
|
||||
export function listPartsResult(bucket: string, key: string, uploadId: string, result: { parts: Array<{ partNumber: number; size: number; etag: string; ts: number }>; nextMarker: number; truncated: boolean }): string {
|
||||
const parts = result.parts.map((part) => `<Part><PartNumber>${part.partNumber}</PartNumber><LastModified>${new Date(part.ts).toISOString()}</LastModified><ETag>"${escapeXml(part.etag)}"</ETag><Size>${part.size}</Size></Part>`).join("");
|
||||
return `<?xml version="1.0" encoding="UTF-8"?>
|
||||
<ListPartsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><Bucket>${escapeXml(bucket)}</Bucket><Key>${escapeXml(key)}</Key><UploadId>${escapeXml(uploadId)}</UploadId><NextPartNumberMarker>${result.nextMarker}</NextPartNumberMarker><IsTruncated>${result.truncated}</IsTruncated>${parts}</ListPartsResult>`;
|
||||
}
|
||||
|
||||
export function listMultipartUploadsResult(bucket: string): string {
|
||||
return `<?xml version="1.0" encoding="UTF-8"?>
|
||||
<ListMultipartUploadsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><Bucket>${escapeXml(bucket)}</Bucket><KeyMarker></KeyMarker><UploadIdMarker></UploadIdMarker><NextKeyMarker></NextKeyMarker><NextUploadIdMarker></NextUploadIdMarker><MaxUploads>1000</MaxUploads><IsTruncated>false</IsTruncated></ListMultipartUploadsResult>`;
|
||||
}
|
||||
|
||||
const PART_RE = /<Part\b[^>]*>([\s\S]*?)<\/Part>/g;
|
||||
const NUM_RE = /<PartNumber>\s*(\d+)\s*<\/PartNumber>/;
|
||||
const ETAG_RE = /<ETag>\s*(?:"|")?([^<"&]*)(?:"|")?\s*<\/ETag>/;
|
||||
|
||||
export function parseCompleteMultipartUpload(xml: string): Array<{ partNumber: number; etag: string }> {
|
||||
const parts: Array<{ partNumber: number; etag: string }> = [];
|
||||
for (const match of xml.matchAll(PART_RE)) {
|
||||
const numberMatch = NUM_RE.exec(match[1]);
|
||||
const etagMatch = ETAG_RE.exec(match[1]);
|
||||
if (!numberMatch || !etagMatch || parts.length >= 10_000) throw new Error("MalformedXML");
|
||||
parts.push({ partNumber: Number(numberMatch[1]), etag: etagMatch[1].trim() });
|
||||
}
|
||||
if (parts.length === 0 && !/<CompleteMultipartUpload\b[^>]*>\s*<\/CompleteMultipartUpload>/.test(xml)) throw new Error("MalformedXML");
|
||||
return parts;
|
||||
}
|
||||
@@ -0,0 +1,54 @@
|
||||
export interface Env {
|
||||
ACCESS_KEY: string;
|
||||
SECRET_KEY: string;
|
||||
REGION: string;
|
||||
GOOGLE_CLIENT_ID: string;
|
||||
GOOGLE_CLIENT_SECRET: string;
|
||||
GOOGLE_REFRESH_TOKEN: string;
|
||||
AUTH_KV: KVNamespace;
|
||||
FOLDER_CACHE: KVNamespace;
|
||||
MPU: DurableObjectNamespace<import("./multipart-do").MultipartUploadDO>;
|
||||
ALLOWED_BUCKETS?: string;
|
||||
PUBLIC_READ_BUCKETS?: string;
|
||||
ALLOW_MULTIPART?: string;
|
||||
ETAG_STYLE?: "md5" | "multipart";
|
||||
}
|
||||
|
||||
export interface GoogleDriveFile {
|
||||
id: string;
|
||||
name: string;
|
||||
mimeType: string;
|
||||
size: string;
|
||||
modifiedTime?: string;
|
||||
md5Checksum?: string;
|
||||
}
|
||||
|
||||
export interface GoogleDriveSearchResponse {
|
||||
files?: GoogleDriveFile[];
|
||||
}
|
||||
|
||||
export interface DriveUploadResult {
|
||||
id: string;
|
||||
name: string;
|
||||
mimeType?: string;
|
||||
size?: string;
|
||||
md5Checksum?: string;
|
||||
}
|
||||
|
||||
export interface DriveDownloadResult {
|
||||
body: ReadableStream;
|
||||
contentType: string;
|
||||
size: number;
|
||||
id: string;
|
||||
md5Checksum?: string;
|
||||
status: number;
|
||||
contentRange?: string;
|
||||
contentLength?: string;
|
||||
}
|
||||
|
||||
export interface DriveFileMetadata {
|
||||
id: string;
|
||||
mimeType: string;
|
||||
size: number;
|
||||
md5Checksum?: string;
|
||||
}
|
||||
Reference in New Issue
Block a user