/
req_tracing.go
120 lines (104 loc) · 3.05 KB
/
req_tracing.go
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package tracing
import (
"net/http/httptrace"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
"github.com/opentracing/opentracing-go/log"
)
// Tracer holds tracing details for one HTTP request.
type requestTracer struct {
// root opentracing.Span
sp opentracing.Span
}
func (r *requestTracer) clientTrace() *httptrace.ClientTrace {
return &httptrace.ClientTrace{
GetConn: r.getConn,
GotConn: r.gotConn,
PutIdleConn: r.putIdleConn,
GotFirstResponseByte: r.gotFirstResponseByte,
Got100Continue: r.got100Continue,
DNSStart: r.dnsStart,
DNSDone: r.dnsDone,
ConnectStart: r.connectStart,
ConnectDone: r.connectDone,
WroteHeaders: r.wroteHeaders,
Wait100Continue: r.wait100Continue,
WroteRequest: r.wroteRequest,
}
}
func (r *requestTracer) getConn(hostPort string) {
ext.PeerAddress.Set(r.sp, hostPort)
r.sp.LogFields(log.String("event", "GetConn"))
}
func (r *requestTracer) gotConn(info httptrace.GotConnInfo) {
r.sp.SetTag("net/http.reused", info.Reused)
r.sp.SetTag("net/http.was_idle", info.WasIdle)
r.sp.LogFields(log.String("event", "GotConn"))
}
func (r *requestTracer) putIdleConn(error) {
r.sp.LogFields(log.String("event", "PutIdleConn"))
}
func (r *requestTracer) gotFirstResponseByte() {
r.sp.LogFields(log.String("event", "GotFirstResponseByte"))
}
func (r *requestTracer) got100Continue() {
r.sp.LogFields(log.String("event", "Got100Continue"))
}
func (r *requestTracer) dnsStart(info httptrace.DNSStartInfo) {
r.sp.LogFields(
log.String("event", "DNSStart"),
log.String("host", info.Host),
)
}
func (r *requestTracer) dnsDone(info httptrace.DNSDoneInfo) {
fields := []log.Field{log.String("event", "DNSDone")}
for _, addr := range info.Addrs {
fields = append(fields, log.String("addr", addr.String()))
}
if info.Err != nil {
fields = append(fields, log.Error(info.Err))
}
r.sp.LogFields(fields...)
}
func (r *requestTracer) connectStart(network, addr string) {
r.sp.LogFields(
log.String("event", "ConnectStart"),
log.String("network", network),
log.String("addr", addr),
)
}
func (r *requestTracer) connectDone(network, addr string, err error) {
if err != nil {
r.sp.LogFields(
log.String("message", "ConnectDone"),
log.String("network", network),
log.String("addr", addr),
log.String("event", "error"),
log.Error(err),
)
} else {
r.sp.LogFields(
log.String("event", "ConnectDone"),
log.String("network", network),
log.String("addr", addr),
)
}
}
func (r *requestTracer) wroteHeaders() {
r.sp.LogFields(log.String("event", "WroteHeaders"))
}
func (r *requestTracer) wait100Continue() {
r.sp.LogFields(log.String("event", "Wait100Continue"))
}
func (r *requestTracer) wroteRequest(info httptrace.WroteRequestInfo) {
if info.Err != nil {
r.sp.LogFields(
log.String("message", "WroteRequest"),
log.String("event", "error"),
log.Error(info.Err),
)
ext.Error.Set(r.sp, true)
} else {
r.sp.LogFields(log.String("event", "WroteRequest"))
}
}