57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
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package apm
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import (
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"context"
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"fmt"
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"strconv"
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"time"
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"github.com/SkyAPM/go2sky"
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"github.com/SkyAPM/go2sky/propagation"
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v3 "github.com/SkyAPM/go2sky/reporter/grpc/language-agent"
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"github.com/gin-gonic/gin"
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)
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const componentIDGINHttpServer = 5006
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type ctxKey struct{}
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var ctxKeyInstance = ctxKey{}
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//Middleware gin middleware return HandlerFunc with tracing.
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func HttpTraceMiddleware(engine *gin.Engine, tracer *go2sky.Tracer) gin.HandlerFunc {
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if engine == nil || tracer == nil {
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return func(c *gin.Context) {
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c.Next()
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}
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}
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return func(c *gin.Context) {
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span, ctx, err := tracer.CreateEntrySpan(context.Background(), getOperationName(c), func() (string, error) {
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return c.Request.Header.Get(propagation.Header), nil
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})
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if err != nil {
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c.Next()
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return
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}
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span.SetComponent(componentIDGINHttpServer)
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span.Tag(go2sky.TagHTTPMethod, c.Request.Method)
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span.Tag(go2sky.TagURL, c.Request.Host+c.Request.URL.Path)
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span.SetSpanLayer(v3.SpanLayer_Http)
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c.Request = c.Request.WithContext(context.WithValue(c.Request.Context(), ctxKeyInstance, ctx))
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c.Next()
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if len(c.Errors) > 0 {
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span.Error(time.Now(), c.Errors.String())
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}
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span.Tag(go2sky.TagStatusCode, strconv.Itoa(c.Writer.Status()))
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span.End()
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}
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}
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func getOperationName(c *gin.Context) string {
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return fmt.Sprintf("/%s%s", c.Request.Method, c.FullPath())
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}
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