英文:
Why configures the ReadIdleTimeout HTTP/2 option for the transport on go1.16?
问题
根据你提供的内容，我们注意到在google-api-go-client/transport/http/configure_http2_go116.go文件中，通过配置ReadIdleTimeout选项来为传输配置HTTP/2。这样做的目的是为了更快地清除断开的空闲连接，防止客户端尝试重用无法工作的连接。
而在google-api-go-client/transport/http/configure_http2_not_go116.go文件中，由于在Go 1.16及更高版本中才提供了相应的接口，因此该函数不执行任何操作。
根据net/http2/transport.go文件的注释，ConfigureTransport函数在很久之前就已经添加了，用于将net/http的HTTP/1传输配置为使用HTTP/2。
至于为什么在go1.16上配置传输的ReadIdleTimeout HTTP/2选项，具体原因可能需要查看更多的上下文信息。
英文:
From google api golang client, we notice that
google-api-go-client/transport/http/configure_http2_go116.go
//go:build go1.16
// +build go1.16
...
// configureHTTP2 configures the ReadIdleTimeout HTTP/2 option for the
// transport. This allows broken idle connections to be pruned more quickly,
// preventing the client from attempting to re-use connections that will no
// longer work.
func configureHTTP2(trans *http.Transport) {
http2Trans, err := http2.ConfigureTransports(trans)
if err == nil {
http2Trans.ReadIdleTimeout = time.Second * 31
}
}
Whereas in this file google-api-go-client/transport/http/configure_http2_not_go116.go
//go:build !go1.16
// +build !go1.16
// configureHTTP2 configures the ReadIdleTimeout HTTP/2 option for the
// transport. The interface to do this is only available in Go 1.16 and up, so
// this performs a no-op.
func configureHTTP2(trans *http.Transport) {}
Per net/http2/transport.go the ConfigureTransport was added long time before.
// ConfigureTransport configures a net/http HTTP/1 Transport to use HTTP/2.
// It returns an error if t1 has already been HTTP/2-enabled.
//
// Use ConfigureTransports instead to configure the HTTP/2 Transport.
func ConfigureTransport(t1 *http.Transport) error {
Why configures the ReadIdleTimeout HTTP/2 option for the transport on go1.16?
答案1
得分: 2
在golang.org/x/net/http2包中有两个听起来很相似的函数，但它们的作用非常不同：
func ConfigureTransport(t1 *http.Transport) error
func ConfigureTransports(t1 *http.Transport) (*Transport, error)
我认为你可能把前者和后者搞混了。
根据问题跟踪器：
https://go-review.googlesource.com/c/net/+/264017
这两个非常相似的名称很不幸，但它们在godoc中会排在一起，而复数形式的ConfigureTransports提示了它的目的：它允许你同时配置http和http2传输。
ConfigureTransports是在一年前引入的：
commit 08b38378de702b893ee869b94b32f833e2933bd2
Author: Damien Neil <dneil@google.com>
Date: Tue Oct 20 12:34:04 2020 -0700
http2: add ConfigureTransports
ConfigureTransport函数没有提供任何方法来获取它创建的http2 Transport，因此无法配置传输参数，如ReadIdleTimeout。
英文:
There are two similar sounding functions in package golang.org/x/net/http2 with very different roles:
func ConfigureTransport (t1 *http.Transport) error
func ConfigureTransports (t1 *http.Transport) (*Transport, error)
I think you are confusing the former with the latter.
From the issue tracker:
https://go-review.googlesource.com/c/net/+/264017
> The very similar names are unfortunate, but they'll sort next to each
> other in godoc and the pluralized ConfigureTransports hints at its
> purpose: it lets you configure both the http and http2 transports.
ConfigureTransports was only introduced exactly a year ago:
commit 08b38378de702b893ee869b94b32f833e2933bd2
Author: Damien Neil <dneil@google.com>
Date: Tue Oct 20 12:34:04 2020 -0700
http2: add ConfigureTransports
The ConfigureTransport function doesn't provide any way to get at the
http2 Transport it creates, making it impossible to configure transport
parameters such as ReadIdleTimeout.
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