```

feat(config): 添加代理配置选项

添加USE_PROXY和PROXY_URL配置项以支持请求代理功能

feat(utils): 新增代理URL获取工具函数

引入get_proxied_url工具函数用于处理代理请求

refactor(services): 将所有外部API请求通过代理转发

修改file_service、generation_service和task_service中的requests.get/post调用，
统一使用get_proxied_url包装URL以支持代理访问外部API服务
```

config.py

@@ -66,3 +66,7 @@ MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlDx4KdOtOQE+tBq6jHKKFenRaRe2gbBnleBk
     # 开发模式配置
     DEV_MODE = False  # True=开发模式（固定验证码），False=生产模式（真实短信）
     DEV_SMS_CODE = "888888"  # 开发模式下的固定验证码
+    
+    # Proxy Config
+    USE_PROXY = True # 是否开启代理
+    PROXY_URL = "https://nas.4x4g.com:10011/api/tool/proxy/?url="

services/file_service.py

@@ -6,6 +6,7 @@ from urllib.parse import quote
 from werkzeug.utils import secure_filename
 from config import Config
 from extensions import s3_client
+from utils import get_proxied_url
 
 def handle_file_uploads(files):
     """处理文件上传到 MinIO"""
@@ -22,7 +23,7 @@ def handle_file_uploads(files):
 
 def get_remote_file_stream(url):
     """获取远程文件的流"""
-    req = requests.get(url, stream=True, timeout=60)
+    req = requests.get(get_proxied_url(url), stream=True, timeout=60)
     req.raise_for_status()
     
     headers = {}

services/generation_service.py

@@ -8,6 +8,7 @@ import json
 import uuid
 import threading
 from flask import current_app
+from utils import get_proxied_url
 
 def get_model_cost(model_value, is_video=False):
     """获取模型消耗积分"""
@@ -88,7 +89,7 @@ def handle_chat_generation_sync(user_id, api_key, model_value, prompt, use_trial
         "messages": [{"role": "user", "content": prompt}]
     }
     try:
-        resp = requests.post(Config.CHAT_API, json=chat_payload, headers=headers, timeout=120)
+        resp = requests.post(get_proxied_url(Config.CHAT_API), json=chat_payload, headers=headers, timeout=120)
         if resp.status_code != 200:
             if use_trial:
                 refund_points(user_id, cost)

services/task_service.py

@@ -13,6 +13,7 @@ from extensions import s3_client, redis_client, db
 from models import GenerationRecord, User
 from config import Config
 from services.logger import system_logger
+from utils import get_proxied_url
 
 def sync_images_background(app, record_id, raw_urls):
     """后台同步图片至 MinIO，并生成缩略图，带重试机制"""
@@ -22,7 +23,7 @@ def sync_images_background(app, record_id, raw_urls):
             success = False
             for attempt in range(3):  # 3 次重试机制
                 try:
-                    img_resp = requests.get(raw_url, timeout=30)
+                    img_resp = requests.get(get_proxied_url(raw_url), timeout=30)
                     if img_resp.status_code == 200:
                         content = img_resp.content
                         ext = ".png"
@@ -98,7 +99,7 @@ def process_image_generation(app, user_id, task_id, payload, api_key, target_api
         try:
             headers = {"Authorization": f"Bearer {api_key}", "Content-Type": "application/json"}
             # 使用较长的超时时间 (10分钟)，确保长耗时任务不被中断
-            resp = requests.post(target_api, json=payload, headers=headers, timeout=1000)
+            resp = requests.post(get_proxied_url(target_api), json=payload, headers=headers, timeout=1000)
             
             if resp.status_code != 200:
                 if use_trial:
@@ -151,7 +152,7 @@ def sync_video_background(app, record_id, raw_url, internal_task_id=None):
         for attempt in range(3):
             try:
                 # 增加了流式下载，处理大视频文件
-                with requests.get(raw_url, stream=True, timeout=120) as r:
+                with requests.get(get_proxied_url(raw_url), stream=True, timeout=120) as r:
                     r.raise_for_status()
                     content_type = r.headers.get('content-type', 'video/mp4')
                     ext = ".mp4"
@@ -209,7 +210,7 @@ def process_video_generation(app, user_id, internal_task_id, payload, api_key, c
         try:
             headers = {"Authorization": f"Bearer {api_key}", "Content-Type": "application/json"}
             # 1. 提交任务
-            submit_resp = requests.post(Config.VIDEO_GEN_API, json=payload, headers=headers, timeout=60)
+            submit_resp = requests.post(get_proxied_url(Config.VIDEO_GEN_API), json=payload, headers=headers, timeout=60)
             if submit_resp.status_code != 200:
                 raise Exception(f"视频任务提交失败: {submit_resp.text}")
             
@@ -233,7 +234,7 @@ def process_video_generation(app, user_id, internal_task_id, payload, api_key, c
                 
                 time.sleep(10)
                 poll_url = Config.VIDEO_POLL_API.format(task_id=remote_task_id)
-                poll_resp = requests.get(poll_url, headers=headers, timeout=30)
+                poll_resp = requests.get(get_proxied_url(poll_url), headers=headers, timeout=30)
                 if poll_resp.status_code != 200:
                     continue
                 

utils.py

@@ -0,0 +1,11 @@
+from urllib.parse import quote
+from config import Config
+
+def get_proxied_url(url):
+    """
+    如果启用了代理，则返回经过代理包装的 URL。
+    否则返回原 URL。
+    """
+    if Config.USE_PROXY and url:
+        return f"{Config.PROXY_URL}{quote(url)}"
+    return url