python config_error ai_generated true

werkzeug.exceptions.RequestEntityTooLarge: 413 Request Entity Too Large: The data value transmitted exceeds the capacity limit.

ID: python/flask-max-content-length-413

Also available as: JSON · Markdown · 中文
80%Fix Rate
86%Confidence
0Evidence
2024-03-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
2.x active — — —
3.x active — — —

Root Cause

MAX_CONTENT_LENGTH set lower than the upload size, or reverse proxy (nginx client_max_body_size) rejects first.

generic

中文

MAX_CONTENT_LENGTH 设置低于上传大小，或反向代理（nginx client_max_body_size）先拒绝。

Workarounds

  1. 92% success 
    app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024  # 16 MB
  2. 90% success 
    In nginx: client_max_body_size 16m;  # align with app config

Dead Ends

Common approaches that don't work:

  1. 70% fail

    Removes DoS protection; still capped by proxy.

  2. 85% fail

    Body was never read; handler has no data.