python runtime_error ai_generated true

werkzeug.exceptions.RequestEntityTooLarge: 413 Request Entity Too Large

ID: python/flask-request-entity-too-large

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
0Evidence
2025-10-20First Seen

Version Compatibility

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

Root Cause

The uploaded file or request body exceeds the configured MAX_CONTENT_LENGTH.

generic

中文

上传的文件或请求体超过了配置的 MAX_CONTENT_LENGTH。

Workarounds

  1. 90% success 
    app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024  # 16MB
  2. 85% success 
    Handle file in chunks without loading into memory.

Dead Ends

Common approaches that don't work:

  1. 60% fail

    May cause memory issues and DoS vulnerability.

  2. 80% fail

    Removes protection against large payloads.