Skip to content

http module documented default behavior only triggered if undocumented option is set #53035

Description

@earslap

Affected URL(s)

https://nodejs.org/api/http.html#responsewritechunk-encoding-callback

Description of the problem

For the http module, the documentation for response.write says:

Writing to the body is not allowed when the request method or response status do not support content. If an attempt is made to write to the body for a HEAD request or as part of a 204 or 304response, a synchronous Error with the code ERR_HTTP_BODY_NOT_ALLOWED is thrown.

However this is not the default behavior. By default, nodejs swallows the provided body and prints the debug message (enabled by NODE_DEBUG=http):

HTTP 77822: This type of response MUST NOT have a body. Ignoring write() calls.

The documented behavior (throwing ERR_HTTP_BODY_NOT_ALLOWED) happens only when rejectNonStandardBodyWrites option is set to true while creating a server with createServer. However this option is not documented, it does not exist in @node/types either.

Activity

  1. added
    docIssues and PRs related to Node.js documentation.
    on May 17, 2024
  2. avivkeller commented on May 17, 2024

    @avivkeller
    Member

    Thanks! If you'd like, you can submit a PR updating the documentation, and the team will be more than happy to review :-)

  3. earslap commented on May 17, 2024

    @earslap
    Author

    I'd like to submit a PR but I'm not sure about which way to go about it. rejectNonStandardBodyWrites is not documented and is not part of the typescript types either. I don't know if that omission is intentional or not; I have not been able find any discussion about it.

    Should I somehow add that to the documentation, and separately push it for @types/node and document the actual behavior? Or should I just remove the part from the documentation that says:

    Writing to the body is not allowed when the request method or response status do not support content. If an attempt is made to write to the body for a HEAD request or as part of a 204 or 304response, a synchronous Error with the code ERR_HTTP_BODY_NOT_ALLOWED is thrown.

    Not sure which way this should go right now.

  4. avivkeller commented on May 17, 2024

    @avivkeller
    Member

    @nodejs/http

  5. ShogunPanda commented on May 18, 2024

    @ShogunPanda
    Contributor

    @earslap The omission is not intentional. The author of the PR was supposed to sent a fix-up PR for docs (and types) but never did. See: #47732 (comment)

    You are more than welcome to send your PR.

  6. added
    httpIssues and PRs related to the http subsystem.
    on May 18, 2024
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Labels

    docIssues and PRs related to Node.js documentation.httpIssues and PRs related to the http subsystem.

    Type

    No type

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions