Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

net/http: support status code 102 (Processing) in ResponseWriter #36734

Closed
majewsky opened this issue Jan 24, 2020 · 9 comments
Closed

net/http: support status code 102 (Processing) in ResponseWriter #36734

majewsky opened this issue Jan 24, 2020 · 9 comments
Labels
FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
Milestone
Go1.19

Comments

@majewsky
Copy link

HTTP status code 102 (Processing) is defined by RFC 2518, section 10.1:

This status code SHOULD only be sent when the server has a reasonable expectation that the request will take significant time to complete. [...] The server MUST send a final response after the request has been completed.

As of now (Go 1.13.6), there is no way to actually send a 102 response because ResponseWriter.WriteHeader() can only be called once. Any successive calls are rejected (here).

Since the ResponseWriter interface cannot be extended without breaking backwards compatibility, a new interface should be added (and implemented by the existing ResponseWriter implementations) that exposes a function for sending an interim response with status 102.
@toothrot toothrot added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Jan 24, 2020
@toothrot toothrot added this to the Backlog milestone Jan 24, 2020
@toothrot
Copy link
Contributor

WebDAV specific features might be better suited for x/net/webdav. I'm not positive we could make this change in net/http while maintaining API compatibility.

/cc @bradfitz @nigeltao

@bradfitz
Copy link
Contributor

I don't think we'd need API changes. We could just permit WriteHeader(102) followed by a non-1xx status later

@florian-forestier
Copy link

florian-forestier commented Sep 1, 2020 •
edited
Loading

Hey,

Any update about this ? It would be a nice feature.

For my use case, it doesn't have any link with WebDAV. I have some very long requests, who can make hundreds of other requests to various requests, and adding this kind of functionality would enable my users to stay listening at the server. Currently, they are in timeout...

Also, for the net/http and not a WebDav-specific protocol, this improvement would permit developers to use HTTP 103 - Early Hints (https://tools.ietf.org/html/rfc8297, still experimental, but exists).

The change is pretty simple : if status is 1xx, we allow update, if not we reject as it is currently done. (show concerned line)

dunglas added a commit to dunglas/go that referenced this issue Nov 13, 2020
@dunglas
net/http: allow sending 1xx responses
33505cb 
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.

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.

Fixes golang#26089.
Fixes golang#36734.
Updates golang#26088.
@dunglas dunglas mentioned this issue Nov 13, 2020
Closed
@gopherbot
Copy link
Contributor

Change https://golang.org/cl/269997 mentions this issue: net/http: allow sending 1xx responses

@dunglas dunglas mentioned this issue Nov 14, 2020
Closed
@gopherbot
Copy link
Contributor

Change https://golang.org/cl/270157 mentions this issue: http2: allow sending 1xx responses

dunglas added a commit to dunglas/go that referenced this issue Feb 10, 2021
@dunglas
net/http: allow sending 1xx responses
c7acb39 
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.

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.

Fixes golang#26089.
Fixes golang#36734.
Updates golang#26088.
@dunglas dunglas mentioned this issue Feb 10, 2021
Closed
@gopherbot
Copy link
Contributor

Change https://golang.org/cl/291029 mentions this issue: http2: allow sending 1xx responses

dunglas added a commit to dunglas/go that referenced this issue Mar 5, 2021
@dunglas
net/http: allow sending 1xx responses
5f47c54 
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.

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.

Fixes golang#26089.
Fixes golang#36734.
Updates golang#26088.
dunglas added a commit to dunglas/go that referenced this issue May 25, 2021
@dunglas
net/http: allow sending 1xx responses
5b552d2 
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.

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.

Fixes golang#26089.
Fixes golang#36734.
Updates golang#26088.
dunglas added a commit to dunglas/go that referenced this issue Jul 16, 2021
@dunglas
net/http: allow sending 1xx responses
bb872c6 
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.

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.

Fixes golang#26089.
Fixes golang#36734.
Updates golang#26088.
dunglas added a commit to dunglas/go that referenced this issue Dec 21, 2021
@dunglas
net/http: allow sending 1xx responses
f617d85 
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.

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.

Fixes golang#26089.
Fixes golang#36734.
Updates golang#26088.
dunglas added a commit to dunglas/go that referenced this issue Jan 4, 2022
@dunglas
net/http: allow sending 1xx responses
2887d26 
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.

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.

Fixes golang#26089.
Fixes golang#36734.
Updates golang#26088.
@madCode
Copy link

madCode commented Mar 11, 2022

Hey @dunglas! What's the status of the linked PR? I see it's been in progress since Feb of 2021.

@dunglas
Copy link
Contributor

dunglas commented Mar 12, 2022

@madCode it is ready, waiting for a final review by the core team.

dunglas added a commit to dunglas/go that referenced this issue Mar 25, 2022
@dunglas
net/http: allow sending 1xx responses
4d5b168 
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.

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.

Fixes golang#26089.
Fixes golang#36734.
Updates golang#26088.
dunglas added a commit to dunglas/go that referenced this issue Mar 28, 2022
@dunglas
net/http: allow sending 1xx responses
263597f 
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.

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.

Fixes golang#26089.
Fixes golang#36734.
Updates golang#26088.
dunglas added a commit to dunglas/go that referenced this issue Apr 8, 2022
@dunglas
net/http: allow sending 1xx responses
4f15e91 
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.

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.

Fixes golang#26089.
Fixes golang#36734.
Updates golang#26088.
dunglas added a commit to dunglas/go that referenced this issue Apr 29, 2022
@dunglas
net/http: allow sending 1xx responses
704cfd5 
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 golang#26089.
Fixes golang#36734.
Updates golang#26088.
dunglas added a commit to dunglas/go that referenced this issue May 13, 2022
@dunglas
net/http: allow sending 1xx responses
0d36e8d 
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 golang#26089.
Fixes golang#36734.
Updates golang#26088.
dunglas added a commit to dunglas/go that referenced this issue May 17, 2022
@dunglas
net/http: allow sending 1xx responses
127f6c6 
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 golang#26089.
Fixes golang#36734.
Updates golang#26088.
dunglas added a commit to dunglas/go that referenced this issue May 17, 2022
@dunglas
net/http: allow sending 1xx responses
bcf90e8 
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 golang#26089.
Fixes golang#36734.
Updates golang#26088.
gopherbot pushed a commit that referenced this issue May 17, 2022
@dunglas @neild
net/http: allow sending 1xx responses
770e0e5 
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>
@dmitshur dmitshur removed the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label May 17, 2022
@dmitshur dmitshur added the NeedsFix The path to resolution is known, but the work has not been done. label May 17, 2022
@dmitshur dmitshur modified the milestones: Backlog, Go1.19 May 17, 2022
dunglas added a commit to dunglas/go that referenced this issue May 31, 2022
@dunglas
net/http: reverseproxy: forward 1xx responses
619e4f9 
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 added a commit to dunglas/go that referenced this issue May 31, 2022
@dunglas
net/http: reverseproxy: forward 1xx responses
902f8a7 
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 dunglas mentioned this issue May 31, 2022
Closed
@gopherbot
Copy link
Contributor

Change https://go.dev/cl/409536 mentions this issue: net/http: reverseproxy: forward 1xx responses

dteh pushed a commit to dteh/fhttp that referenced this issue Jun 22, 2022
@dunglas @neild
http2: allow sending 1xx responses
81f458e 
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 golang/go#26089.
Fixes golang/go#36734.
Updates golang/go#26088.

Change-Id: Iadb7be92844a3588ef4ce044f887ef5c1792f431
GitHub-Last-Rev: eee95b58b3b259781fc1052ed6143a0aa9284e04
GitHub-Pull-Request: golang/net#96
Reviewed-on: https://go-review.googlesource.com/c/net/+/291029
Run-TryBot: Damien Neil <dneil@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
WeiminShang added a commit to WeiminShang/net that referenced this issue Nov 16, 2022
@WeiminShang @neild
http2: allow sending 1xx responses
c99e8df 
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 golang/go#26089.
Fixes golang/go#36734.
Updates golang/go#26088.

Change-Id: Iadb7be92844a3588ef4ce044f887ef5c1792f431
GitHub-Last-Rev: eee95b58b3b259781fc1052ed6143a0aa9284e04
GitHub-Pull-Request: golang/net#96
Reviewed-on: https://go-review.googlesource.com/c/net/+/291029
Run-TryBot: Damien Neil <dneil@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
@timofurrer timofurrer mentioned this issue Apr 12, 2023
Closed
@golang golang locked and limited conversation to collaborators May 31, 2023
Sign up for free to subscribe to this conversation on GitHub. Already have an account? Sign in.
Assignees
No one assigned
Labels
FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
Projects
None yet
Milestone
Go1.19
8 participants
@bradfitz @toothrot @majewsky @dunglas @dmitshur @madCode @florian-forestier @gopherbot