mirror of
https://gitee.com/johng/gf
synced 2026-07-04 21:03:13 +08:00
91 lines
3.0 KiB
Go
91 lines
3.0 KiB
Go
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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package client
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import (
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"fmt"
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"github.com/gogf/gf"
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"github.com/gogf/gf/internal/utils"
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"github.com/gogf/gf/net/ghttp/internal/httputil"
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"github.com/gogf/gf/net/gtrace"
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"go.opentelemetry.io/otel"
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"go.opentelemetry.io/otel/codes"
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"go.opentelemetry.io/otel/label"
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"go.opentelemetry.io/otel/propagation"
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"go.opentelemetry.io/otel/trace"
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"io/ioutil"
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"net/http"
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"net/http/httptrace"
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)
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const (
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tracingMaxContentLogSize = 512 * 1024 // Max log size for request and response body.
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tracingAttrHttpAddressRemote = "http.address.remote"
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tracingAttrHttpAddressLocal = "http.address.local"
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tracingAttrHttpDnsStart = "http.dns.start"
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tracingAttrHttpDnsDone = "http.dns.done"
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tracingAttrHttpConnectStart = "http.connect.start"
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tracingAttrHttpConnectDone = "http.connect.done"
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tracingEventHttpRequest = "http.request"
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tracingEventHttpRequestHeaders = "http.request.headers"
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tracingEventHttpRequestBody = "http.request.body"
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tracingEventHttpResponse = "http.response"
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tracingEventHttpResponseHeaders = "http.response.headers"
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tracingEventHttpResponseBody = "http.response.body"
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)
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// MiddlewareTracing is a client middleware that enables tracing feature using standards of OpenTelemetry.
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func MiddlewareTracing(c *Client, r *http.Request) (response *Response, err error) {
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tr := otel.GetTracerProvider().Tracer(
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"github.com/gogf/gf/net/ghttp.Client",
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trace.WithInstrumentationVersion(fmt.Sprintf(`%s`, gf.VERSION)),
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)
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ctx, span := tr.Start(r.Context(), r.URL.String(), trace.WithSpanKind(trace.SpanKindClient))
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defer span.End()
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span.SetAttributes(gtrace.CommonLabels()...)
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// Inject tracing content into http header.
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propagator := propagation.NewCompositeTextMapPropagator(
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propagation.TraceContext{},
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propagation.Baggage{},
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)
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propagator.Inject(ctx, r.Header)
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// Continue client handler executing.
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response, err = c.Next(
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r.WithContext(
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httptrace.WithClientTrace(
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ctx, newClientTrace(ctx, span, r),
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),
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),
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)
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if err != nil {
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span.SetStatus(codes.Error, fmt.Sprintf(`%+v`, err))
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}
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if response == nil || response.Response == nil {
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return
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}
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var resBodyContent string
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if response.ContentLength <= tracingMaxContentLogSize {
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reqBodyContentBytes, _ := ioutil.ReadAll(response.Body)
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resBodyContent = string(reqBodyContentBytes)
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response.Body = utils.NewReadCloser(reqBodyContentBytes, false)
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} else {
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resBodyContent = fmt.Sprintf(
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"[Response Body Too Large For Tracing, Max: %d bytes]",
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tracingMaxContentLogSize,
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)
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}
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span.AddEvent(tracingEventHttpResponse, trace.WithAttributes(
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label.Any(tracingEventHttpResponseHeaders, httputil.HeaderToMap(response.Header)),
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label.String(tracingEventHttpResponseBody, resBodyContent),
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))
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return
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}
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