添加高级设置：apiHost地址、proxy地址 (#205)

ChuanhuChatbot.py

@@ -183,6 +183,28 @@ with gr.Blocks(css=customCSS) as demo:
                             with gr.Row():
                                 with gr.Column():
                                     downloadFile = gr.File(interactive=True)
+                                    
+                with gr.Tab(label="高级"):
+                    default_btn = gr.Button("🔙 恢复默认设置")
+                    gr.Markdown("# ⚠️ 务必谨慎更改 ⚠️\n\n如果无法使用请恢复默认设置")
+                    
+                    apiurlTxt = gr.Textbox(
+                        show_label=True,
+                        placeholder=f"在这里输入API地址...",
+                        label="API地址",
+                        value="https://api.openai.com/v1/chat/completions",
+                        lines=2
+                    )
+                    changeAPIURLBtn = gr.Button("🔄 切换API地址")
+                    proxyTxt = gr.Textbox(
+                        show_label=True,
+                        placeholder=f"在这里输入代理地址...",
+                        label="代理地址（示例：http://127.0.0.1:10809）",
+                        value="",
+                        lines=2
+                    )
+                    changeProxyBtn = gr.Button("🔄 设置代理地址")
+
 
     gr.Markdown(description)
 
@@ -315,8 +337,27 @@ with gr.Blocks(css=customCSS) as demo:
         [downloadFile, systemPromptTxt, history, chatbot],
         [saveFileName, systemPromptTxt, history, chatbot],
     )
-
-
+    
+    # Advanced
+    default_btn.click(
+        reset_default,
+        [],
+        [apiurlTxt, proxyTxt],
+        show_progress=True
+    )
+    changeAPIURLBtn.click(
+        change_api_url,
+        [apiurlTxt],
+        [],
+        show_progress=True,
+    )
+    changeProxyBtn.click(
+        change_proxy,
+        [proxyTxt],
+        [],
+        show_progress=True,
+    )
+    
 logging.info(
     colorama.Back.GREEN
     + "\n川虎的温馨提示：访问 http://localhost:7860 查看界面"

utils.py

@@ -642,3 +642,19 @@ def reset_state():
 
 def reset_textbox():
     return gr.update(value="")
+
+def reset_default():
+    global API_URL
+    API_URL = "https://api.openai.com/v1/chat/completions"
+    os.environ.pop("HTTPS_PROXY", None)
+    os.environ.pop("https_proxy", None)
+    return gr.update(value=API_URL), gr.update(value="")
+
+def change_api_url(url):
+    global API_URL 
+    API_URL = url
+    logging.info(f"更改API地址为{url}")
+
+def change_proxy(proxy):
+    os.environ["HTTPS_PROXY"] = proxy
+    logging.info(f"更改代理为{proxy}")