feat(proxy): add universal proxy support and fix Gemini model resolution (#536)

Integrated undici ProxyAgent for native fetch and HttpsProxyAgent for axios/openai/anthropic. Upgraded @google/generative-ai to fix #536. Added OCO_PROXY config.

Co-authored-by: uni <uni@hanwei.ink>

src/engine/Engine.ts

@@ -11,6 +11,7 @@ export interface AiEngineConfig {
   maxTokensOutput: number;
   maxTokensInput: number;
   baseURL?: string;
+  proxy?: string;
   customHeaders?: Record<string, string>;
 }
 

src/engine/anthropic.ts

@@ -1,4 +1,5 @@
 import AnthropicClient from '@anthropic-ai/sdk';
+import { HttpsProxyAgent } from 'https-proxy-agent';
 import {
   MessageCreateParamsNonStreaming,
   MessageParam
@@ -18,7 +19,15 @@ export class AnthropicEngine implements AiEngine {
 
   constructor(config) {
     this.config = config;
-    this.client = new AnthropicClient({ apiKey: this.config.apiKey });
+    const clientOptions: any = { apiKey: this.config.apiKey };
+
+    const proxy =
+      config.proxy || process.env.HTTPS_PROXY || process.env.HTTP_PROXY;
+    if (proxy) {
+      clientOptions.httpAgent = new HttpsProxyAgent(proxy);
+    }
+
+    this.client = new AnthropicClient(clientOptions);
   }
 
   public generateCommitMessage = async (

src/engine/gemini.ts

@@ -29,10 +29,15 @@ export class GeminiEngine implements AiEngine {
       .map((m) => m.content)
       .join('\n');
 
-    const gemini = this.client.getGenerativeModel({
-      model: this.config.model,
-      systemInstruction
-    });
+    const gemini = this.client.getGenerativeModel(
+      {
+        model: this.config.model,
+        systemInstruction
+      },
+      {
+        baseUrl: this.config.baseURL
+      }
+    );
 
     const contents = messages
       .filter((m) => m.role !== 'system')

src/engine/mistral.ts

@@ -1,4 +1,5 @@
 import { OpenAI } from 'openai';
+import { HttpsProxyAgent } from 'https-proxy-agent';
 import { GenerateCommitMessageErrorEnum } from '../generateCommitMessageFromGitDiff';
 import { normalizeEngineError } from '../utils/engineErrorHandler';
 import { removeContentTags } from '../utils/removeContentTags';

src/engine/openAi.ts

@@ -1,4 +1,5 @@
 import { OpenAI } from 'openai';
+import { HttpsProxyAgent } from 'https-proxy-agent';
 import { GenerateCommitMessageErrorEnum } from '../generateCommitMessageFromGitDiff';
 import { parseCustomHeaders } from '../utils/engine';
 import { normalizeEngineError } from '../utils/engineErrorHandler';
@@ -23,6 +24,12 @@ export class OpenAiEngine implements AiEngine {
       clientOptions.baseURL = config.baseURL;
     }
 
+    const proxy =
+      config.proxy || process.env.HTTPS_PROXY || process.env.HTTP_PROXY;
+    if (proxy) {
+      clientOptions.httpAgent = new HttpsProxyAgent(proxy);
+    }
+
     if (config.customHeaders) {
       const headers = parseCustomHeaders(config.customHeaders);
       if (Object.keys(headers).length > 0) {