net/http: allow sending 1xx responses #42597
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Message from Kévin Dunglas: Patch Set 5: (1 comment) Please don’t reply on this GitHub thread. Visit golang.org/cl/269997. |
amitbasuri
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Message from Brad Fitzpatrick: Patch Set 5: (1 comment) Please don’t reply on this GitHub thread. Visit golang.org/cl/269997. |
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Currently, it's not possible to send informational responses such as 103 Early Hints or 102 Processing. This patch allows calling WriteHeader() multiple times in order to send informational responses before the final one. It follows the patch for HTTP/1 (golang/go#42597) and HTTP/2 (golang/net#96). In conformance with RFC 8297, if the status code is 103 the current content of the header map is also sent. Its content is not removed after the call to WriteHeader() because the headers must also be included in the final response. The Chrome and Fastly teams are starting a large-scale experiment to measure the real-life impact of the 103 status code. Using Early Hints is proposed as a (partial) alternative to Server Push, which are going to be removed from Chrome: https://groups.google.com/a/chromium.org/g/blink-dev/c/K3rYLvmQUBY/m/21anpFhxAQAJ Being able to send this status code from servers implemented using Go would help to see if implementing it in browsers is worth it.
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Currently, it's not possible to send informational responses such as 103 Early Hints or 102 Processing. This patch allows calling WriteHeader() multiple times in order to send informational responses before the final one. It follows the patch for HTTP/1 (golang/go#42597) and HTTP/2 (golang/net#96). In conformance with RFC 8297, if the status code is 103 the current content of the header map is also sent. Its content is not removed after the call to WriteHeader() because the headers must also be included in the final response. The Chrome and Fastly teams are starting a large-scale experiment to measure the real-life impact of the 103 status code. Using Early Hints is proposed as a (partial) alternative to Server Push, which are going to be removed from Chrome: https://groups.google.com/a/chromium.org/g/blink-dev/c/K3rYLvmQUBY/m/21anpFhxAQAJ Being able to send this status code from servers implemented using Go would help to see if implementing it in browsers is worth it.
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Currently, it's not possible to send informational responses such as 103 Early Hints or 102 Processing. This patch allows calling WriteHeader() multiple times in order to send informational responses before the final one. It follows the patch for HTTP/1 (golang/go#42597) and HTTP/2 (golang/net#96). In conformance with RFC 8297, if the status code is 103 the current content of the header map is also sent. Its content is not removed after the call to WriteHeader() because the headers must also be included in the final response. The Chrome and Fastly teams are starting a large-scale experiment to measure the real-life impact of the 103 status code. Using Early Hints is proposed as a (partial) alternative to Server Push, which are going to be removed from Chrome: https://groups.google.com/a/chromium.org/g/blink-dev/c/K3rYLvmQUBY/m/21anpFhxAQAJ Being able to send this status code from servers implemented using Go would help to see if implementing it in browsers is worth it.
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docteurklein
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Hi @bradfitz, Is the tree open again? I improved the PR to flush headers as soon as possible and improved the documentation. Cheers, |
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Hi @bradfitz, I replied to all your comments and rebased. Is there anything else I can do to get this patch merged? Thanks! |
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Message from Brad Fitzpatrick: Patch Set 1: (1 comment) Please don’t reply on this GitHub thread. Visit golang.org/cl/269997. |
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Message from Kévin Dunglas: Patch Set 5: (1 comment) Please don’t reply on this GitHub thread. Visit golang.org/cl/269997. |
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Message from Gopher Robot: Patch Set 27: TryBot-Result+1 (1 comment) Please don’t reply on this GitHub thread. Visit golang.org/cl/269997. |
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Message from Damien Neil: Patch Set 27: (1 comment) Please don’t reply on this GitHub thread. Visit golang.org/cl/269997. |
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Currently, it's not possible to send informational responses such as 103 Early Hints or 102 Processing. This patch allows calling WriteHeader() multiple times in order to send informational responses before the final one. If the status code is in the 1xx range, the current content of the header map is also sent. Its content is not removed after the call to WriteHeader() because the headers must also be included in the final response. The Chrome and Fastly teams are starting a large-scale experiment to measure the real-life impact of the 103 status code. Using Early Hints is proposed as a (partial) alternative to Server Push, which are going to be removed from Chrome: https://groups.google.com/a/chromium.org/g/blink-dev/c/K3rYLvmQUBY/m/21anpFhxAQAJ Being able to send this status code from servers implemented using Go would help to see if implementing it in browsers is worth it. Fixes #26089 Fixes #36734 Updates #26088 Change-Id: Ib7023c1892c35e8915d4305dd7f6373dbd00a19d GitHub-Last-Rev: 06d749d GitHub-Pull-Request: #42597 Reviewed-on: https://go-review.googlesource.com/c/go/+/269997 Reviewed-by: Damien Neil <dneil@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
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This PR is being closed because golang.org/cl/269997 has been merged. |
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Content-Length and Transfer-Encoding must not be sent when the response has no body. Necessary to fix the tests of golang/go#42597. Change-Id: Ibe90048bb122cc3ad1e04f8ebf9aa966b40489ae GitHub-Last-Rev: 2605919 GitHub-Pull-Request: #134 Reviewed-on: https://go-review.googlesource.com/c/net/+/406494 TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Damien Neil <dneil@google.com> Run-TryBot: Damien Neil <dneil@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
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Support for 1xx responses has recently been merged in net/http (golang#42597). As discussed in this CL (https://go-review.googlesource.com/c/go/+/269997/comments/1ff70bef_c25a829a), support for forwarding 1xx responses in ReverseProxy has been extracted in this separate patch. According to RFC 7231, "a proxy MUST forward 1xx responses unless the proxy itself requested the generation of the 1xx response". Consequently, all received 1xx responses are automatically forwarded as long as the underlying transport supports ClientTrace.Got1xxResponse.
dunglas
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Support for 1xx responses has recently been merged in net/http (golang#42597). As discussed in this CL (https://go-review.googlesource.com/c/go/+/269997/comments/1ff70bef_c25a829a), support for forwarding 1xx responses in ReverseProxy has been extracted in this separate patch. According to RFC 7231, "a proxy MUST forward 1xx responses unless the proxy itself requested the generation of the 1xx response". Consequently, all received 1xx responses are automatically forwarded as long as the underlying transport supports ClientTrace.Got1xxResponse. Fixes golang#26088 Fixes golang#36734
dunglas
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May 31, 2022
Support for 1xx responses has recently been merged in net/http (golang#42597). As discussed in this CL (https://go-review.googlesource.com/c/go/+/269997/comments/1ff70bef_c25a829a), support for forwarding 1xx responses in ReverseProxy has been extracted in this separate patch. According to RFC 7231, "a proxy MUST forward 1xx responses unless the proxy itself requested the generation of the 1xx response". Consequently, all received 1xx responses are automatically forwarded as long as the underlying transport supports ClientTrace.Got1xxResponse. Fixes golang#26088 Fixes golang#36734
dunglas
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May 31, 2022
Support for 1xx responses has recently been merged in net/http (golang#42597). As discussed in this CL (https://go-review.googlesource.com/c/go/+/269997/comments/1ff70bef_c25a829a), support for forwarding 1xx responses in ReverseProxy has been extracted in this separate patch. According to RFC 7231, "a proxy MUST forward 1xx responses unless the proxy itself requested the generation of the 1xx response". Consequently, all received 1xx responses are automatically forwarded as long as the underlying transport supports ClientTrace.Got1xxResponse. Fixes golang#26088 Fixes golang#51914
dteh
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Jun 10, 2022
Currently, it's not possible to send informational responses such as 103 Early Hints or 102 Processing. This patch allows calling WriteHeader() multiple times in order to send informational responses before the final one. If the status code is in the 1xx range, the current content of the header map is also sent. Its content is not removed after the call to WriteHeader() because the headers must also be included in the final response. The Chrome and Fastly teams are starting a large-scale experiment to measure the real-life impact of the 103 status code. Using Early Hints is proposed as a (partial) alternative to Server Push, which are going to be removed from Chrome: https://groups.google.com/a/chromium.org/g/blink-dev/c/K3rYLvmQUBY/m/21anpFhxAQAJ Being able to send this status code from servers implemented using Go would help to see if implementing it in browsers is worth it. Fixes #26089 Fixes #36734 Updates #26088 Change-Id: Ib7023c1892c35e8915d4305dd7f6373dbd00a19d GitHub-Last-Rev: 06d749d3454aa35c177a50ce4a25715df21fd742 GitHub-Pull-Request: golang/go#42597 Reviewed-on: https://go-review.googlesource.com/c/go/+/269997 Reviewed-by: Damien Neil <dneil@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
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Content-Length and Transfer-Encoding must not be sent when the response has no body. Necessary to fix the tests of golang/go#42597. Change-Id: Ibe90048bb122cc3ad1e04f8ebf9aa966b40489ae GitHub-Last-Rev: 2605919859d0b6b4b5d41da68c8bc3efddea4cbf GitHub-Pull-Request: golang/net#134 Reviewed-on: https://go-review.googlesource.com/c/net/+/406494 TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Damien Neil <dneil@google.com> Run-TryBot: Damien Neil <dneil@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
dunglas
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Support for 1xx responses has recently been merged in net/http (golang#42597). As discussed in this CL (https://go-review.googlesource.com/c/go/+/269997/comments/1ff70bef_c25a829a), support for forwarding 1xx responses in ReverseProxy has been extracted in this separate patch. According to RFC 7231, "a proxy MUST forward 1xx responses unless the proxy itself requested the generation of the 1xx response". Consequently, all received 1xx responses are automatically forwarded as long as the underlying transport supports ClientTrace.Got1xxResponse. Fixes golang#26088 Fixes golang#51914
dunglas
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Support for 1xx responses has recently been merged in net/http (golang#42597). As discussed in this CL (https://go-review.googlesource.com/c/go/+/269997/comments/1ff70bef_c25a829a), support for forwarding 1xx responses in ReverseProxy has been extracted in this separate patch. According to RFC 7231, "a proxy MUST forward 1xx responses unless the proxy itself requested the generation of the 1xx response". Consequently, all received 1xx responses are automatically forwarded as long as the underlying transport supports ClientTrace.Got1xxResponse. Fixes golang#26088 Fixes golang#51914
dunglas
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Support for 1xx responses has recently been merged in net/http (golang#42597). As discussed in this CL (https://go-review.googlesource.com/c/go/+/269997/comments/1ff70bef_c25a829a), support for forwarding 1xx responses in ReverseProxy has been extracted in this separate patch. According to RFC 7231, "a proxy MUST forward 1xx responses unless the proxy itself requested the generation of the 1xx response". Consequently, all received 1xx responses are automatically forwarded as long as the underlying transport supports ClientTrace.Got1xxResponse. Fixes golang#26088 Fixes golang#51914
WeiminShang
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Nov 16, 2022
Content-Length and Transfer-Encoding must not be sent when the response has no body. Necessary to fix the tests of golang/go#42597. Change-Id: Ibe90048bb122cc3ad1e04f8ebf9aa966b40489ae GitHub-Last-Rev: 2605919859d0b6b4b5d41da68c8bc3efddea4cbf GitHub-Pull-Request: golang/net#134 Reviewed-on: https://go-review.googlesource.com/c/net/+/406494 TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Damien Neil <dneil@google.com> Run-TryBot: Damien Neil <dneil@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
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…Early Hints) and other 1XX statuses (dunglas) This PR was squashed before being merged into the 6.3 branch. Discussion ---------- [HttpFoundation] Add support for the 103 status code (Early Hints) and other 1XX statuses | Q | A | ------------- | --- | Branch? | 6.3 | Bug fix? | no | New feature? | yes <!-- please update src/**/CHANGELOG.md files --> | Deprecations? | yes <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files --> | Tickets | n/a <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead --> | License | MIT | Doc PR | todo This patch adds support for sending informational responses, including [Early Hints responses](https://developer.chrome.com/blog/early-hints/) if supported by the SAPI. It also allows sending other informational status codes such as 102 Processing. According to [Shopify](https://twitter.com/colinbendell/status/1539322190541295616) and [Cloudflare](http://blog.cloudflare.com/early-hints-performance), using Early Hints, the performance improvement to the Largest Contentful Paint can go from several hundred milliseconds, and up to a second faster. Usage: ```php <?php namespace App\Controller; use Symfony\Bundle\FrameworkBundle\Controller\AbstractController; use Symfony\Component\HttpFoundation\Response; use Symfony\Component\Routing\Annotation\Route; use Symfony\Component\WebLink\Link; class HomepageController extends AbstractController { #[Route("/", name: "homepage")] public function index(): Response { $response = $this->sendEarlyHints([ (new Link(href: '/style.css'))->withAttribute('as', 'stylesheet'), (new Link(href: '/script.js'))->withAttribute('as', 'script'), ]); // Do something slow... return $this->render('homepage/index.html.twig', response: $response); } } ``` With this patch, HttpFoundation will leverage the `headers_send()` function provided by [FrankenPHP](https://frankenphp.dev). FrankenPHP is currently the only SAPI supporting Early Hints, but other SAPI such as mod_apache will probably implement this function at some point: php/php-src#7025 (comment) The low-level API is similar to the one provided by Go: golang/go#42597 The high-level API helper in `AbstractController` is similar to Node's one: nodejs/node#44180 Commits ------- 5be52b2 [HttpFoundation] Add support for the 103 status code (Early Hints) and other 1XX statuses
dteh
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Oct 26, 2024
Currently, it's not possible to send informational responses such as 103 Early Hints or 102 Processing. This patch allows calling WriteHeader() multiple times in order to send informational responses before the final one. If the status code is in the 1xx range, the current content of the header map is also sent. Its content is not removed after the call to WriteHeader() because the headers must also be included in the final response. The Chrome and Fastly teams are starting a large-scale experiment to measure the real-life impact of the 103 status code. Using Early Hints is proposed as a (partial) alternative to Server Push, which are going to be removed from Chrome: https://groups.google.com/a/chromium.org/g/blink-dev/c/K3rYLvmQUBY/m/21anpFhxAQAJ Being able to send this status code from servers implemented using Go would help to see if implementing it in browsers is worth it. Fixes #26089 Fixes #36734 Updates #26088 Change-Id: Ib7023c1892c35e8915d4305dd7f6373dbd00a19d GitHub-Last-Rev: 06d749d3454aa35c177a50ce4a25715df21fd742 GitHub-Pull-Request: golang/go#42597 Reviewed-on: https://go-review.googlesource.com/c/go/+/269997 Reviewed-by: Damien Neil <dneil@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
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Currently, it's not possible to send informational responses such as
103 Early Hints or 102 Processing.
This patch allows calling WriteHeader() multiple times in order
to send informational responses before the final one.
If the status code is in the 1xx range, the current content of the header map
is also sent. Its content is not removed after the call to WriteHeader()
because the headers must also be included in the final response.
The Chrome and Fastly teams are starting a large-scale experiment to measure
the real-life impact of the 103 status code.
Using Early Hints is proposed as a (partial) alternative to Server Push,
which are going to be removed from Chrome:
https://groups.google.com/a/chromium.org/g/blink-dev/c/K3rYLvmQUBY/m/21anpFhxAQAJ
Being able to send this status code from servers implemented using Go would
help to see if implementing it in browsers is worth it.
Fixes #26089
Fixes #36734
Updates #26088