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feat(provider): add free providers and enhance error handling

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This commit is contained in:
decolua
2026-02-07 11:17:06 +07:00
parent 53a5f43993
commit bdbe8162e7
16 changed files with 285 additions and 120 deletions
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open-sse/services/combo.js
+30 -20
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@@ -2,7 +2,8 @@
* Shared combo (model combo) handling with fallback support
*/
import { checkFallbackError } from "./accountFallback.js";
import { checkFallbackError, formatRetryAfter } from "./accountFallback.js";
import { unavailableResponse } from "../utils/error.js";
/**
* Get combo models from combos data
@@ -35,6 +36,8 @@ export function getComboModelsFromData(modelStr, combosData) {
*/
export async function handleComboChat({ body, models, handleSingleModel, log }) {
let lastError = null;
let earliestRetryAfter = null;
let lastStatus = null;
for (let i = 0; i < models.length; i++) {
const modelStr = models[i];
@@ -48,47 +51,54 @@ export async function handleComboChat({ body, models, handleSingleModel, log })
return result;
}
// Extract error message from response
// Extract error info from response
let errorText = result.statusText || "";
let retryAfter = null;
try {
const errorBody = await result.clone().json();
errorText = errorBody?.error ?? errorBody?.message ?? errorText;
errorText = errorBody?.error?.message || errorBody?.error || errorBody?.message || errorText;
retryAfter = errorBody?.retryAfter || null;
} catch {
// Ignore JSON parse errors
}
// Track earliest retryAfter across all combo models
if (retryAfter && (!earliestRetryAfter || new Date(retryAfter) < new Date(earliestRetryAfter))) {
earliestRetryAfter = retryAfter;
}
// Normalize error text to string (Worker-safe)
if (typeof errorText !== "string") {
try {
errorText = JSON.stringify(errorText);
} catch {
errorText = String(errorText);
}
try { errorText = JSON.stringify(errorText); } catch { errorText = String(errorText); }
}
// Check if should fallback to next model
const { shouldFallback } = checkFallbackError(result.status, errorText);
if (!shouldFallback) {
// Don't fallback - return error immediately (e.g. 401 auth errors)
log.warn("COMBO", `Model ${modelStr} failed (no fallback)`, { status: result.status });
return result;
}
// Fallback to next model
lastError = `${modelStr}: ${errorText || result.status}`;
log.warn("COMBO", `Model ${modelStr} failed, trying next`, { status: result.status, error: errorText.slice(0, 100) });
lastError = errorText || String(result.status);
if (!lastStatus) lastStatus = result.status;
log.warn("COMBO", `Model ${modelStr} failed, trying next`, { status: result.status });
}
log.warn("COMBO", "All combo models failed");
// Return 503 with last error
// All models failed
const status = 406;
const msg = lastError || "All combo models unavailable";
if (earliestRetryAfter) {
const retryHuman = formatRetryAfter(earliestRetryAfter);
log.warn("COMBO", `All models failed | ${msg} (${retryHuman})`);
return unavailableResponse(status, msg, earliestRetryAfter, retryHuman);
}
log.warn("COMBO", `All models failed | ${msg}`);
return new Response(
JSON.stringify({ error: lastError || "All combo models unavailable" }),
{
status: 503,
headers: { "Content-Type": "application/json" }
}
JSON.stringify({ error: { message: msg } }),
{ status, headers: { "Content-Type": "application/json" } }
);
}