go runtime_error ai_generated true

http: request body already closed

ID: go/http-request-body-already-closed

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-03-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.21 active — — —
1.22 active — — —

Root Cause

Attempting to read from or close an http.Request.Body that has already been closed, typically due to double-close or reading after the handler has returned.

generic

中文

尝试读取或关闭已经关闭的http.Request.Body，通常是由于重复关闭或处理器返回后继续读取。

Workarounds

  1. 95% success 
    if body, err := io.ReadAll(r.Body); err == nil { r.Body.Close() }
  2. 90% success 
    defer r.Body.Close() once at start of handler

Dead Ends

Common approaches that don't work:

  1. 80% fail

    Silently ignoring leads to incomplete reads and potential data corruption

  2. 90% fail

    Request body is a stream and cannot be reopened; must be buffered upfront if multiple reads needed