archive
archive/tar
archive/zip
bufio
bufio（缓存）
builtin
builtin（内置包）
bytes
bytes（包字节）
compress
compress/bzip2（压缩/bzip2）
compress/flate（压缩/flate）
compress/gzip（压缩/gzip）
compress/lzw（压缩/lzw）
compress/zlib（压缩/zlib）
container
container/heap（容器数据结构heap）
container/list（容器数据结构list）
container/ring（容器数据结构ring）
context
context（上下文）
crypto
crypto（加密）
crypto/aes（加密/aes）
crypto/cipher（加密/cipher）
crypto/des（加密/des）
crypto/dsa（加密/dsa）
crypto/ecdsa（加密/ecdsa）
crypto/elliptic（加密/elliptic）
crypto/hmac（加密/hmac）
crypto/md5（加密/md5）
crypto/rand（加密/rand）
crypto/rc4（加密/rc4）
crypto/rsa（加密/rsa）
crypto/sha1（加密/sha1）
crypto/sha256（加密/sha256）
crypto/sha512（加密/sha512）
crypto/subtle（加密/subtle）
crypto/tls（加密/tls）
crypto/x509（加密/x509）
crypto/x509/pkix（加密/x509/pkix）
database
database/sql（数据库/sql）
database/sql/driver（数据库/sql/driver）
debug
debug/dwarf（调试/dwarf）
debug/elf（调试/elf）
debug/gosym（调试/gosym）
debug/macho（调试/macho）
debug/pe（调试/pe）
debug/plan9obj（调试/plan9obj）
encoding
encoding（编码）
encoding/ascii85（编码/ascii85）
encoding/asn1（编码/asn1）
encoding/base32（编码/base32）
encoding/base64（编码/base64）
encoding/binary（编码/binary）
encoding/csv（编码/csv）
encoding/gob（编码/gob）
encoding/hex（编码/hex）
encoding/json（编码/json）
encoding/pem（编码/pem）
encoding/xml（编码/xml）
errors
errors（错误）
expvar
expvar
flag
flag（命令行参数解析flag包）
fmt
fmt
go
go/ast（抽象语法树）
go/build
go/constant（常量）
go/doc（文档）
go/format（格式）
go/importer
go/parser
go/printer
go/scanner（扫描仪）
go/token（令牌）
go/types（类型）
hash
hash（散列）
hash/adler32
hash/crc32
hash/crc64
hash/fnv
html
html
html/template（模板）
image
image（图像）
image/color（颜色）
image/color/palette（调色板）
image/draw（绘图）
image/gif
image/jpeg
image/png
index
index/suffixarray
io
io
io/ioutil
log
log
log/syslog（日志系统）
math
math
math/big
math/big
math/bits
math/bits
math/cmplx
math/cmplx
math/rand
math/rand
mime
mime
mime/multipart（多部分）
mime/quotedprintable
net
net
net/http
net/http
net/http/cgi
net/http/cookiejar
net/http/fcgi
net/http/httptest
net/http/httptrace
net/http/httputil
net/http/internal
net/http/pprof
net/mail
net/mail
net/rpc
net/rpc
net/rpc/jsonrpc
net/smtp
net/smtp
net/textproto
net/textproto
net/url
net/url
os
os
os/exec
os/signal
os/user
path
path
path/filepath（文件路径）
plugin
plugin（插件）
reflect
reflect（反射）
regexp
regexp（正则表达式）
regexp/syntax
runtime
runtime（运行时）
runtime/debug（调试）
runtime/internal/sys
runtime/pprof
runtime/race（竞争）
runtime/trace（执行追踪器）
sort
sort（排序算法）
strconv
strconv（转换）
strings
strings（字符串）
sync
sync（同步）
sync/atomic（原子操作）
syscall
syscall（系统调用）
testing
testing（测试）
testing/iotest
testing/quick
text
text/scanner（扫描文本）
text/tabwriter
text/template（定义模板）
text/template/parse
time
time（时间戳）
unicode
unicode
unicode/utf16
unicode/utf8
unsafe
unsafe
©
Ce document utilise Manuel du site Web PHP chinois Libérer
personnages
import "net/http/httptrace"
概述
索引
示例
概述
httptrace包提供跟踪HTTP客户端请求中的事件的机制。
示例
package mainimport ("fmt""log""net/http""net/http/httptrace")func main() {
req, _ := http.NewRequest("GET", "http://example.com", nil)
trace := &httptrace.ClientTrace{
GotConn: func(connInfo httptrace.GotConnInfo) {
fmt.Printf("Got Conn: %+v\n", connInfo)},
DNSDone: func(dnsInfo httptrace.DNSDoneInfo) {
fmt.Printf("DNS Info: %+v\n", dnsInfo)},}
req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))
_, err := http.DefaultTransport.RoundTrip(req)if err != nil {
log.Fatal(err)}}索引
func WithClientTrace(ctx context.Context, trace *ClientTrace) context.Context
type ClientTrace
func ContextClientTrace(ctx context.Context) *ClientTrace
type DNSDoneInfo
type DNSStartInfo
type GotConnInfo
type WroteRequestInfo
示例
包
文件包
trace.go
func WithClientTrace
func WithClientTrace(ctx context.Context, trace *ClientTrace) context.Context
WithClientTrace根据提供的父ctx返回一个新的上下文。除了使用ctx注册的任何以前的挂钩外，使用返回的上下文创建的HTTP客户端请求将使用提供的跟踪挂钩。在提供的轨迹中定义的任何钩子将首先被调用。
type ClientTrace
ClientTrace是一组挂钩，可以在传出的HTTP请求的各个阶段运行。任何特定的钩子可能是零。函数可以从不同的goroutine同时调用，有些可能在请求完成或失败后调用。
ClientTrace当前在单次往返过程中跟踪单个HTTP请求和响应，并且没有跨越一系列重定向请求的挂钩。
type ClientTrace struct { // GetConn is called before a connection is created or // retrieved from an idle pool. The hostPort is the // "host:port" of the target or proxy. GetConn is called even // if there's already an idle cached connection available.
GetConn func(hostPort string) // GotConn is called after a successful connection is // obtained. There is no hook for failure to obtain a // connection; instead, use the error from // Transport.RoundTrip.
GotConn func(GotConnInfo) // PutIdleConn is called when the connection is returned to // the idle pool. If err is nil, the connection was // successfully returned to the idle pool. If err is non-nil, // it describes why not. PutIdleConn is not called if // connection reuse is disabled via Transport.DisableKeepAlives. // PutIdleConn is called before the caller's Response.Body.Close // call returns. // For HTTP/2, this hook is not currently used.
PutIdleConn func(err error) // GotFirstResponseByte is called when the first byte of the response // headers is available.
GotFirstResponseByte func() // Got100Continue is called if the server replies with a "100 // Continue" response.
Got100Continue func() // DNSStart is called when a DNS lookup begins.
DNSStart func(DNSStartInfo) // DNSDone is called when a DNS lookup ends.
DNSDone func(DNSDoneInfo) // ConnectStart is called when a new connection's Dial begins. // If net.Dialer.DualStack (IPv6 "Happy Eyeballs") support is // enabled, this may be called multiple times.
ConnectStart func(network, addr string) // ConnectDone is called when a new connection's Dial // completes. The provided err indicates whether the // connection completedly successfully. // If net.Dialer.DualStack ("Happy Eyeballs") support is // enabled, this may be called multiple times.
ConnectDone func(network, addr string, err error) // TLSHandshakeStart is called when the TLS handshake is started. When // connecting to a HTTPS site via a HTTP proxy, the handshake happens after // the CONNECT request is processed by the proxy.
TLSHandshakeStart func() // TLSHandshakeDone is called after the TLS handshake with either the // successful handshake's connection state, or a non-nil error on handshake // failure.
TLSHandshakeDone func(tls.ConnectionState, error) // WroteHeaders is called after the Transport has written // the request headers.
WroteHeaders func() // Wait100Continue is called if the Request specified // "Expected: 100-continue" and the Transport has written the // request headers but is waiting for "100 Continue" from the // server before writing the request body.
Wait100Continue func() // WroteRequest is called with the result of writing the // request and any body. It may be called multiple times // in the case of retried requests.
WroteRequest func(WroteRequestInfo)}func ContextClientTrace
func ContextClientTrace(ctx context.Context) *ClientTrace
ContextClientTrace返回与提供的上下文关联的ClientTrace。如果没有，则返回零。
type DNSDoneInfo
DNSDoneInfo包含有关DNS查找结果的信息。
type DNSDoneInfo struct { // Addrs are the IPv4 and/or IPv6 addresses found in the DNS // lookup. The contents of the slice should not be mutated.
Addrs []net.IPAddr // Err is any error that occurred during the DNS lookup.
Err error // Coalesced is whether the Addrs were shared with another // caller who was doing the same DNS lookup concurrently.
Coalesced bool}type DNSStartInfo
DNSStartInfo包含有关DNS请求的信息。
type DNSStartInfo struct {
Host string}type GotConnInfo
GotConnInfo是ClientTrace.GotConn函数的参数，并包含有关获取的连接的信息。
type GotConnInfo struct { // Conn is the connection that was obtained. It is owned by // the http.Transport and should not be read, written or // closed by users of ClientTrace.
Conn net.Conn // Reused is whether this connection has been previously // used for another HTTP request.
Reused bool // WasIdle is whether this connection was obtained from an // idle pool.
WasIdle bool // IdleTime reports how long the connection was previously // idle, if WasIdle is true.
IdleTime time.Duration}type WroteRequestInfo
WroteRequestInfo包含提供给WroteRequest钩子的信息。
type WroteRequestInfo struct { // Err is any error encountered while writing the Request.
Err error}