[HttpFoundation] Do not set a Transfer-Encoding header of chunked for streaming responses#3017
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Apache expects the response to already be in chunked format in that case, which causes it to not deliver the streamed body. If no Content-Length is set on the response, web servers will automatically switch to chunked Transfer-Encoding, and handle the chunking for you. Nginx does not share the issue that apache has, but will add the Content- Length header too.
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How about adding a negative test to avoid regressions and document why it's necessary, i.e. assertNotEquals(...)?
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Commits ------- 7ae9348 [streaming] Document and test that Transfer-Encoding is absent 83c23ca [streaming] Do not set a Transfer-Encoding header of chunked Discussion ---------- [HttpFoundation] Do not set a Transfer-Encoding header of chunked for streaming responses Bug fix: yes Feature addition: no Backwards compatibility break: no Symfony2 tests pass: yes This is an adjustment to the streaming introduced in #2935. Apache expects the response to already be in chunked format when the Transfer-Encoding header is set to chunked, which causes it to not deliver the streamed body. If no Content-Length is set on the response (regardless of Transfer-Encoding), web servers will automatically switch to chunked Transfer-Encoding, and handle the chunking for you. I have tested this with Apache 2.2.2 and nginx 1.0.5. Testing with other webservers is appreciated.
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Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
This is an adjustment to the streaming introduced in #2935.
Apache expects the response to already be in chunked format when the Transfer-Encoding header is set to chunked, which causes it to not deliver the streamed body.
If no Content-Length is set on the response (regardless of Transfer-Encoding), web servers will automatically switch to chunked Transfer-Encoding, and handle the chunking for you.
I have tested this with Apache 2.2.2 and nginx 1.0.5. Testing with other webservers is appreciated.