python data_error ai_generated true

requests.exceptions.JSONDecodeError: Expecting value: line 1 column 1 (char 0) while parsing response from 'https://api.example.com/v1/data'

ID: python/requests-jsondecodeerror-invalid-response

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-09-14First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

The server returned a non-JSON response (e.g., HTML error page) but the client expects JSON.

generic

中文

服务器返回了非JSON响应（例如HTML错误页面），但客户端期望JSON。

Workarounds

  1. 95% success Check the response status code and content type before parsing JSON 
    response = requests.get('https://api.example.com/v1/data')
if response.status_code == 200 and 'application/json' in response.headers.get('Content-Type', ''):
    data = response.json()
else:
    print('Unexpected response:', response.text)
  2. 90% success Use response.raise_for_status() to catch HTTP errors before parsing 
    response = requests.get('https://api.example.com/v1/data')
response.raise_for_status()
data = response.json()

Dead Ends

Common approaches that don't work:

  1. Using json.loads() directly on response.text without checking status 80% fail

    The response may be an error page, not JSON, causing the same decode error.

  2. Setting a custom decoder with strict=False 90% fail

    The response is not JSON at all, so no decoder can parse it.