rust web_framework_error ai_generated true

JsonPayloadError: Payload error: payload reached size limit

ID: rust/rust-actix-payload-error

Also available as: JSON · Markdown
91%Fix Rate
93%Confidence
50Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1 active — — —

Root Cause

Actix-web rejects payloads exceeding the default size limit (256KB). Increase the limit via JsonConfig.

generic

Workarounds

  1. 93% success Configure JsonConfig with an appropriate payload size limit 
    use actix_web::web;
App::new()
    .app_data(web::JsonConfig::default().limit(1048576)) // 1MB
    .service(my_handler)

    Sources: https://actix.rs/docs/extractors/

  2. 80% success Use streaming deserialization for very large payloads 
    Use actix_web::web::Payload stream instead of Json<T> extractor for bodies > 10MB

    Sources: https://actix.rs/docs/request/

Dead Ends

Common approaches that don't work:

  1. Disable payload size checking entirely 75% fail

    Opens the server to denial-of-service attacks via oversized payloads

Error Chain

Leads to:
Preceded by:
Frequently confused with: