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go/doc
Jay Conrod faa53e17d1 cmd/go: add support for GOPROXY fallback on unexpected errors
URLs in GOPROXY may now be separated with commas (,) or pipes (|). If
a request to a proxy fails with any error (including connection errors
and timeouts) and the proxy URL is followed by a pipe, the go command
will try the request with the next proxy in the list. If the proxy is
followed by a comma, the go command will only try the next proxy if
the error a 404 or 410 HTTP response.

The go command will determine how to connect to the checksum database
using the same logic. Before accessing the checksum database, the go
command sends a request to <proxyURL>/sumdb/<sumdb-name>/supported.
If a proxy responds with 404 or 410, or if any other error occurs and
the proxy URL in GOPROXY is followed by a pipe, the go command will
try the request with the next proxy. If all proxies respond with 404
or 410 or are configured to fall back on errors, the go command will
connect to the checksum database directly.

This CL does not change the default value or meaning of GOPROXY.

Fixes #37367

Change-Id: I35dd218823fe8cb9383e9ac7bbfec2cc8a358748
Reviewed-on: https://go-review.googlesource.com/c/go/+/226460
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2020-03-31 20:08:48 +00:00
..
articles doc/articles/wiki: use correct variable name in closures guide 2020-03-20 08:42:30 +00:00
codewalk doc: convert remaining bash tests to Go 2019-11-14 21:33:00 +00:00
gopher doc/gopher: add model sheet 2018-07-18 04:00:10 +00:00
play doc/play: match the hello world snippet in x/website 2019-10-23 22:43:37 +00:00
progs doc: convert remaining bash tests to Go 2019-11-14 21:33:00 +00:00
asm.html doc: update ppc64 section for asm.html 2019-09-16 14:12:02 +00:00
cmd.html doc: remove extra br tags 2020-02-23 01:23:41 +00:00
contrib.html doc: add Go 1.14 to release history 2020-02-25 16:16:10 +00:00
contribute.html doc: fix path to make.bash 2020-03-29 17:16:51 +00:00
debugging_with_gdb.html runtime: support all as parameter in gdb goroutine commands. 2019-04-29 18:11:11 +00:00
diagnostics.html doc: document GODEBUG options to disable use of instruction set extensions 2018-12-18 14:59:36 +00:00
editors.html doc: fix spelling of comp[]hensive to comp[r]ehensive 2018-10-12 22:59:05 +00:00
effective_go.html doc: update Effective Go with 1.14 language changes 2020-02-28 20:15:38 +00:00
gccgo_contribute.html all: remove trailing whitespace from HTML files 2019-09-18 18:32:20 +00:00
gccgo_install.html all: remove trailing whitespace from HTML files 2019-09-18 18:32:20 +00:00
go1.1.html doc: s/tool chain/toolchain/ 2018-01-09 21:47:03 +00:00
go1.2.html doc: use HTTPS for links 2018-06-13 13:45:01 +00:00
go1.3.html doc: rewrite reference to plan9.bell-labs.com to 9p.io 2019-08-19 21:42:54 +00:00
go1.4.html doc: use HTTPS for links 2018-06-13 13:45:01 +00:00
go1.5.html
go1.6.html doc: align documents link 2019-08-26 17:33:52 +00:00
go1.7.html doc: align documents link 2019-08-26 17:33:52 +00:00
go1.8.html doc: align documents link 2019-08-26 17:33:52 +00:00
go1.9.html doc: rename HTML element IDs to avoid duplicates 2020-02-05 14:32:50 +00:00
go1.10.html doc: align documents link 2019-08-26 17:33:52 +00:00
go1.11.html doc: rename HTML element IDs to avoid duplicates 2020-02-05 14:32:50 +00:00
go1.12.html doc: align documents link 2019-08-26 17:33:52 +00:00
go1.13.html doc: rename HTML element IDs to avoid duplicates 2020-02-05 14:32:50 +00:00
go1.14.html doc/go1.14: mention Windows change for Open permissions 2020-03-18 18:59:32 +00:00
go1.15.html cmd/go: add support for GOPROXY fallback on unexpected errors 2020-03-31 20:08:48 +00:00
go1.html doc: change anchor URLs from golang.org/dl/ to /dl/ 2018-01-20 04:13:12 +00:00
go1compat.html doc: s/tool chain/toolchain/ 2018-01-09 21:47:03 +00:00
go_faq.html all: remove trailing whitespace from HTML files 2019-09-18 18:32:20 +00:00
go_mem.html doc/mem: remove unnecessary pre tags within same snippet 2020-03-03 09:28:34 +00:00
go_spec.html spec: add missing space in EBNF 2020-01-15 05:32:51 +00:00
go-logo-black.png
go-logo-blue.png
go-logo-white.png
help.html doc: remove a Google+ link since it doesn't exist anymore 2019-06-18 03:41:59 +00:00
ie.css
install-source.html doc: decrease prominence of GOROOT_BOOTSTRAP 2020-03-28 20:43:51 +00:00
install.html doc/install.html: streamline the “Test your installation” step and make it module-agnostic 2020-02-05 18:27:48 +00:00
share.png
tos.html