[BUG] 简洁阐述问题 / langchain 部署 出现bug 怎么调试都是api错误

[jackrous]

TypeError: 'NoneType' object is not iterable
2025-12-22 15:50:24.269 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /knowledge_base/list_knowledge_bases: Invalid port: ':1'
2025-12-22 15:50:24.300 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /knowledge_base/list_knowledge_bases: Invalid port: ':1'
2025-12-22 15:50:24.328 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /knowledge_base/list_knowledge_bases: Invalid port: ':1'
2025-12-22 15:50:24.329 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 15:50:24.329 Uncaught app exception
Traceback (most recent call last):
File "/home/boss/Llama-factory/conda/envs/chatchat/lib/python3.10/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 600, in _run_script
exec(code, module.dict)
File "/home/boss/Llama-factory/conda/envs/chatchat/lib/python3.10/site-packages/chatchat/webui.py", line 71, in
kb_chat(api=api)
File "/home/boss/Llama-factory/conda/envs/chatchat/lib/python3.10/site-packages/chatchat/webui_pages/kb_chat.py", line 118, in kb_chat
kb_list = [x["kb_name"] for x in api.list_knowledge_bases()]
TypeError: 'NoneType' object is not iterable

[dosubot]

你的问题主要有两个原因：

1. API 报错 “Invalid port: ':1'” 是因为 no_proxy 环境变量中包含了未加方括号的 IPv6 地址（如 ::1），导致解析出错。解决方法：把 ::1 改成 [::1]，即 no_proxy=[::1],localhost,127.0.0.1，这样可以避免无效端口错误。详细解释见 相关 issue。

2. “TypeError: 'NoneType' object is not iterable” 是因为 API 调用失败后返回了 None，通常和上面 API 地址配置错误有关。此问题也和 httpx 版本有关，建议升级 httpx 到 0.27.2，命令如下：

pip install httpx==0.27.2 -U

参考：修复建议

请检查你的 API 服务启动参数（host/port），确保没有配置错误，默认应为 0.0.0.0:7861。修正上述两点后，问题一般可以解决。

To reply, just mention @dosu.

---

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[jackrous]

这个是在那个环境下运行？

[jackrous]

(chatchat) boss@boss:~/deepseek/Langchain-Chatchat-master$ chatchat start -a
cwd:/home/boss/deepseek/Langchain-Chatchat-master

==============================Langchain-Chatchat Configuration==============================
操作系统：Linux-6.8.0-87-generic-x86_64-with-glibc2.35.
python版本：3.10.19 (main, Oct 21 2025, 16:43:05) [GCC 11.2.0]
项目版本：0.3.1.3
langchain版本：0.1.17
数据目录：/home/boss/deepseek/Langchain-Chatchat-master

当前使用的分词器：ChineseRecursiveTextSplitter
默认选用的 Embedding 名称： bge-large-zh-v1.5
==============================Langchain-Chatchat Configuration==============================

2025-12-22 15:59:14.005 | INFO | chatchat.startup:start_main_server:257 - 正在启动服务：
2025-12-22 15:59:14.008 | INFO | chatchat.startup:start_main_server:258 - 如需查看 llm_api 日志，请前往 /home/boss/deepseek/Langchain-Chatchat-master/data/logs
/home/boss/Llama-factory/conda/envs/chatchat/lib/python3.10/site-packages/langchain/_api/module_import.py:87: LangChainDeprecationWarning: Importing GuardrailsOutputParser from langchain.output_parsers is deprecated. Please replace the import with the following:
from langchain_community.output_parsers.rail_parser import GuardrailsOutputParser
warnings.warn(
/home/boss/Llama-factory/conda/envs/chatchat/lib/python3.10/site-packages/pydantic/_internal/fields.py:160: UserWarning: Field "model_name" has conflict with protected namespace "model".

You may be able to resolve this warning by setting model_config['protected_namespaces'] = ().
warnings.warn(
2025-12-22 15:59:17.210 | INFO | chatchat.startup:run_api_server:55 - Api MODEL_PLATFORMS: [PlatformConfig(platform_name='xinference', platform_type='xinference', api_base_url='http://127.0.0.1:9997/v1', api_key='EMPTY', api_proxy='', api_concurrencies=5, auto_detect_model=True, llm_models=['DeeepseekR1'], embed_models=['bge-large-zh-v1.5'], text2image_models=[], image2text_models=[], rerank_models=[], speech2text_models=[], text2speech_models=[]), PlatformConfig(platform_name='ollama', platform_type='ollama', api_base_url='http://127.0.0.1:11434/v1', api_key='EMPTY', api_proxy='', api_concurrencies=5, auto_detect_model=False, llm_models=['qwen:7b', 'qwen2:7b'], embed_models=['quentinz/bge-large-zh-v1.5'], text2image_models=[], image2text_models=[], rerank_models=[], speech2text_models=[], text2speech_models=[]), PlatformConfig(platform_name='oneapi', platform_type='oneapi', api_base_url='http://127.0.0.1:3000/v1', api_key='sk-', api_proxy='', api_concurrencies=5, auto_detect_model=False, llm_models=['chatglm_pro', 'chatglm_turbo', 'chatglm_std', 'chatglm_lite', 'qwen-turbo', 'qwen-plus', 'qwen-max', 'qwen-max-longcontext', 'ERNIE-Bot', 'ERNIE-Bot-turbo', 'ERNIE-Bot-4', 'SparkDesk'], embed_models=['text-embedding-v1', 'Embedding-V1'], text2image_models=[], image2text_models=[], rerank_models=[], speech2text_models=[], text2speech_models=[]), PlatformConfig(platform_name='openai', platform_type='openai', api_base_url='https://api.openai.com/v1', api_key='sk-proj-', api_proxy='', api_concurrencies=5, auto_detect_model=False, llm_models=['gpt-4o', 'gpt-3.5-turbo'], embed_models=['text-embedding-3-small', 'text-embedding-3-large'], text2image_models=[], image2text_models=[], rerank_models=[], speech2text_models=[], text2speech_models=[])]
INFO: Started server process [112430]
INFO: Waiting for application startup.
INFO: Application startup complete.
INFO: Uvicorn running on http://127.0.0.1:7861 (Press CTRL+C to quit)
2025-12-22 15:59:19.217 | INFO | chatchat.startup:run_webui:80 - Webui MODEL_PLATFORMS: [PlatformConfig(platform_name='xinference', platform_type='xinference', api_base_url='http://127.0.0.1:9997/v1', api_key='EMPTY', api_proxy='', api_concurrencies=5, auto_detect_model=True, llm_models=['DeeepseekR1'], embed_models=['bge-large-zh-v1.5'], text2image_models=[], image2text_models=[], rerank_models=[], speech2text_models=[], text2speech_models=[]), PlatformConfig(platform_name='ollama', platform_type='ollama', api_base_url='http://127.0.0.1:11434/v1', api_key='EMPTY', api_proxy='', api_concurrencies=5, auto_detect_model=False, llm_models=['qwen:7b', 'qwen2:7b'], embed_models=['quentinz/bge-large-zh-v1.5'], text2image_models=[], image2text_models=[], rerank_models=[], speech2text_models=[], text2speech_models=[]), PlatformConfig(platform_name='oneapi', platform_type='oneapi', api_base_url='http://127.0.0.1:3000/v1', api_key='sk-', api_proxy='', api_concurrencies=5, auto_detect_model=False, llm_models=['chatglm_pro', 'chatglm_turbo', 'chatglm_std', 'chatglm_lite', 'qwen-turbo', 'qwen-plus', 'qwen-max', 'qwen-max-longcontext', 'ERNIE-Bot', 'ERNIE-Bot-turbo', 'ERNIE-Bot-4', 'SparkDesk'], embed_models=['text-embedding-v1', 'Embedding-V1'], text2image_models=[], image2text_models=[], rerank_models=[], speech2text_models=[], text2speech_models=[]), PlatformConfig(platform_name='openai', platform_type='openai', api_base_url='https://api.openai.com/v1', api_key='sk-proj-', api_proxy='', api_concurrencies=5, auto_detect_model=False, llm_models=['gpt-4o', 'gpt-3.5-turbo'], embed_models=['text-embedding-3-small', 'text-embedding-3-large'], text2image_models=[], image2text_models=[], rerank_models=[], speech2text_models=[], text2speech_models=[])]

You can now view your Streamlit app in your browser.

URL: http://0.0.0.0:8501

2025-12-22 15:59:23.525 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /tools: Invalid port: ':1'
2025-12-22 15:59:23.558 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /tools: Invalid port: ':1'
2025-12-22 15:59:23.587 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /tools: Invalid port: ':1'
2025-12-22 15:59:23.588 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
/home/boss/Llama-factory/conda/envs/chatchat/lib/python3.10/site-packages/langchain/_api/module_import.py:87: LangChainDeprecationWarning: Importing GuardrailsOutputParser from langchain.output_parsers is deprecated. Please replace the import with the following:
from langchain_community.output_parsers.rail_parser import GuardrailsOutputParser
warnings.warn(
2025-12-22 15:59:25.420 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /knowledge_base/list_knowledge_bases: Invalid port: ':1'
2025-12-22 15:59:25.450 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /knowledge_base/list_knowledge_bases: Invalid port: ':1'
2025-12-22 15:59:25.476 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /knowledge_base/list_knowledge_bases: Invalid port: ':1'
2025-12-22 15:59:25.477 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 15:59:25.477 Uncaught app exception
Traceback (most recent call last):
File "/home/boss/Llama-factory/conda/envs/chatchat/lib/python3.10/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 600, in _run_script
exec(code, module.dict)
File "/home/boss/Llama-factory/conda/envs/chatchat/lib/python3.10/site-packages/chatchat/webui.py", line 71, in
kb_chat(api=api)
File "/home/boss/Llama-factory/conda/envs/chatchat/lib/python3.10/site-packages/chatchat/webui_pages/kb_chat.py", line 118, in kb_chat
kb_list = [x["kb_name"] for x in api.list_knowledge_bases()]
TypeError: 'NoneType' object is not iterable
2025-12-22 15:59:25.868 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /knowledge_base/list_knowledge_bases: Invalid port: ':1'
2025-12-22 15:59:25.897 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /knowledge_base/list_knowledge_bases: Invalid port: ':1'
2025-12-22 15:59:25.923 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /knowledge_base/list_knowledge_bases: Invalid port: ':1'
2025-12-22 15:59:25.924 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 15:59:25.924 Uncaught app exception
Traceback (most recent call last):
File "/home/boss/Llama-factory/conda/envs/chatchat/lib/python3.10/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 600, in _run_script
exec(code, module.dict)
File "/home/boss/Llama-factory/conda/envs/chatchat/lib/python3.10/site-packages/chatchat/webui.py", line 71, in
kb_chat(api=api)
File "/home/boss/Llama-factory/conda/envs/chatchat/lib/python3.10/site-packages/chatchat/webui_pages/kb_chat.py", line 118, in kb_chat
kb_list = [x["kb_name"] for x in api.list_knowledge_bases()]
TypeError: 'NoneType' object is not iterable
还是报错 这是怎么回事儿

[dosubot]

你的报错“Invalid port: ':1'”和“'NoneType' object is not iterable”有明确的已知原因和修复方法：

1. no_proxy 环境变量问题：你的 no_proxy 里如果有 ::1（IPv6 本地地址），必须写成 [::1]，即 no_proxy=127.0.0.1,localhost,[::1]，否则 httpx 解析会出错，导致端口被识别成 :1，进而 API 调用全部失败。详细解释和修复方法

2. 配置文件端口项：请检查 .env、basic_settings.yaml、model_settings.yaml 等配置文件，确保所有 API_SERVER、api_base_url、public_port 等端口项都是纯数字（如 7861），不能有多余的冒号、括号或空值。配置示例

3. 代理环境变量：确认没有设置 http_proxy、https_proxy、all_proxy 等代理相关环境变量，否则会影响本地 API 通信。

4. httpx 版本兼容性：务必保证 httpx 版本为 0.27.2，命令如下：

   pip install httpx==0.27.2 -U

   版本过高会导致 proxies 参数不被支持，进而 API 客户端初始化失败，所有知识库相关功能都无法正常工作。参考说明

如果你已经做了上述所有操作但问题依旧，请贴出你当前的 no_proxy、API_SERVER、api_base_url 配置内容，以及 httpx 版本，便于进一步定位。

如需彻底避免类似 IPv6 问题，也可以在本地代码 patch 处理 no_proxy，示例代码如下（仅供参考）：

def _bypass_key(host: str):
    host = (host or '').strip()
    if not host:
        return None
    if ':' in host and not (host.startswith('[') and host.endswith(']')):
        host = f'[{host}]'
    return f'all://{host}'

在处理 no_proxy 时对每个 host 调用此函数即可。

只要 no_proxy 配置正确、端口为纯数字且 httpx 版本合适，这类报错都能解决。

To reply, just mention @dosu.

---

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[jackrous]

Traceback (most recent call last):
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/httpx/_urlparse.py", line 364, in normalize_port
    port_as_int = int(port)
                  ^^^^^^^^^
ValueError: invalid literal for int() with base 10: ':1]'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 600, in _run_script
    exec(code, module.dict)
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui.py", line 71, in
    kb_chat(api=api)
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui_pages/kb_chat.py", line 199, in kb_chat
    client = openai.Client(base_url=f"{api_url}/knowledge_base/local_kb/{selected_kb}", api_key="NONE")
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/openai/_client.py", line 164, in init
    super().init(
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/openai/_base_client.py", line 864, in init
    self._client = http_client or SyncHttpxClientWrapper(
                                  ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/openai/_base_client.py", line 794, in init
    super().init(**kwargs)
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/httpx/_client.py", line 705, in init
    self._mounts: dict[URLPattern, BaseTransport | None] = {
                                                           ^
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/httpx/_client.py", line 706, in
    URLPattern(key): None
    ^^^^^^^^^^^^^^^
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/httpx/_utils.py", line 370, in init
    url = URL(pattern)
          ^^^^^^^^^^^^
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/httpx/_urls.py", line 117, in init
    self._uri_reference = urlparse(url, **kwargs)
                          ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/httpx/_urlparse.py", line 260, in urlparse
    parsed_port: int | None = normalize_port(port, scheme)
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/httpx/_urlparse.py", line 366, in normalize_port
    raise InvalidURL(f"Invalid port: {port!r}")
httpx.InvalidURL: Invalid port: ':1]' 报错