From 2f4f8e99ea012eefe10c54f61ba80c415e64d526 Mon Sep 17 00:00:00 2001
From: xixu-me <i@xi-xu.me>
Date: Wed, 19 Aug 2026 17:16:19 +0800
Subject: [PATCH] fix(google): route fallback through XDPL

---
 src/lib/services/googleTranslate.ts        | 27 +++++++++++++---------
 tests/lib/services/googleTranslate.test.ts | 21 ++++++++++++++++-
 2 files changed, 36 insertions(+), 12 deletions(-)

diff --git a/src/lib/services/googleTranslate.ts b/src/lib/services/googleTranslate.ts
index 41cf08b..8377569 100644
--- a/src/lib/services/googleTranslate.ts
+++ b/src/lib/services/googleTranslate.ts
@@ -27,10 +27,20 @@ export async function translateWithGoogle(
   try {
     const { text, source_lang, target_lang } = params;
 
-    // Construct the request to Google Translate's internal API
-    const googleApiUrl = new URL(
-      "https://translate.googleapis.com/translate_a/single"
-    );
+    const proxyUrls = String(config?.env?.PROXY_URLS || "")
+      .split(",")
+      .filter(Boolean);
+    const proxyUrl = proxyUrls[Math.floor(Math.random() * proxyUrls.length)];
+    const attempts = [
+      [
+        proxyUrl
+          ? new URL("/google/translate_a/single", proxyUrl).toString()
+          : "https://translate.googleapis.com/translate_a/single",
+        "gtx",
+      ],
+      ["https://translate.googleapis.com/translate_a/single", "gtx"],
+      ["https://translate.google.com/translate_a/single", "dict-chrome-ex"],
+    ];
     const googleParams = new URLSearchParams();
     googleParams.append("client", "gtx"); // Google Translate web client
     googleParams.append(
@@ -55,16 +65,11 @@ export async function translateWithGoogle(
     };
 
     let googleResponse: Response | undefined;
-    for (const [hostname, client] of [
-      ["translate.googleapis.com", "gtx"],
-      ["translate.google.com", "gtx"],
-      ["translate.googleapis.com", "dict-chrome-ex"],
-    ]) {
-      googleApiUrl.hostname = hostname;
+    for (const [endpoint, client] of attempts) {
       googleParams.set("client", client);
       requestInit.body = googleParams.toString();
       try {
-        googleResponse = await fetch(googleApiUrl.toString(), requestInit);
+        googleResponse = await fetch(endpoint, requestInit);
         if (googleResponse.ok) break;
       } catch {
         // Try the compatible fallback host.
diff --git a/tests/lib/services/googleTranslate.test.ts b/tests/lib/services/googleTranslate.test.ts
index 588049e..6e48117 100644
--- a/tests/lib/services/googleTranslate.test.ts
+++ b/tests/lib/services/googleTranslate.test.ts
@@ -76,6 +76,25 @@ describe("Google Translate Service", () => {
       expect(result.data).toBeNull();
     });
 
+    it("should prefer an XDPL proxy when configured", async () => {
+      global.fetch = jest.fn().mockResolvedValue({
+        ok: true,
+        json: () =>
+          Promise.resolve([[["Hola", "Hello", null, null, 10]], null, "en"]),
+      });
+
+      const result = await translateWithGoogle(
+        { text: "Hello", source_lang: "en", target_lang: "es" },
+        { env: { PROXY_URLS: "https://0.example.com/jsonrpc" } }
+      );
+
+      expect(result.code).toBe(200);
+      expect(fetch).toHaveBeenCalledWith(
+        "https://0.example.com/google/translate_a/single",
+        expect.any(Object)
+      );
+    });
+
     it("should use the compatible host when the primary is unavailable", async () => {
       global.fetch = jest
         .fn()
@@ -96,7 +115,7 @@ describe("Google Translate Service", () => {
       expect(result.code).toBe(200);
       expect(fetch).toHaveBeenCalledTimes(3);
       expect(fetch).toHaveBeenLastCalledWith(
-        expect.stringContaining("translate.googleapis.com"),
+        expect.stringContaining("translate.google.com"),
         expect.objectContaining({
           body: expect.stringContaining("client=dict-chrome-ex"),
         })