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EncoderHttpMessageWriter never sets Content-Length [SPR-16542] #21085

spring-projects-issues opened this issue Feb 27, 2018 · 0 comments


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@spring-projects-issues spring-projects-issues commented Feb 27, 2018

Rossen Stoyanchev opened SPR-16542 and commented

Currently only ResourceHttpMessageWriter and FormHttpMessageWriter set the Content-Length header. For any Encoder (String, byte[], ByteBuffer, etc) wrapped with EncoderHttpMessageWriter, there is no mechanism in place to set the Content-Length header, even in cases where a single item is provided synchronously (e.g. WebClient's syncBody, controller returning a String, etc.).

We should be able to set the content length in cases where the input Publisher is a Mono. That would provide parity with HttpMessageConverters, covering all single value cases (synchronous or asynchronous).

Affects: 5.0.4

Issue Links:

  • #21431 AbstractJackson2Encoder::getContentLength should not return null for MonoJust/FluxJust publisher
  • #21926 Remove transfer-encoding check in EncoderHttpMessageWriter and related workaround in ReactorServerHttpResponse

Referenced from: commits 2781584

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