mirror of https://github.com/astaxie/beego.git
59 lines
2.0 KiB
Go
59 lines
2.0 KiB
Go
// Copyright 2020 beego
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package opentracing
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import (
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"github.com/opentracing/opentracing-go"
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beego "github.com/astaxie/beego/pkg"
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"github.com/astaxie/beego/pkg/context"
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)
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// FilterChainBuilder provides an extension point that we can support more configurations if necessary
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type FilterChainBuilder struct {
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// CustomSpanFunc makes users to custom the span.
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CustomSpanFunc func(span opentracing.Span, ctx *context.Context)
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}
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func (builder *FilterChainBuilder) FilterChain(next beego.FilterFunc) beego.FilterFunc {
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return func(ctx *context.Context) {
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span := opentracing.SpanFromContext(ctx.Request.Context())
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spanCtx := ctx.Request.Context()
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if span == nil {
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operationName := ctx.Input.URL()
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// it means that there is not any span, so we create a span as the root span.
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// TODO, if we support multiple servers, this need to be changed
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route, found := beego.BeeApp.Handlers.FindRouter(ctx)
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if found {
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operationName = route.GetPattern()
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}
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span, spanCtx = opentracing.StartSpanFromContext(spanCtx, operationName)
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newReq := ctx.Request.Clone(spanCtx)
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ctx.Reset(ctx.ResponseWriter.ResponseWriter, newReq)
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}
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defer span.Finish()
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next(ctx)
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// if you think we need to do more things, feel free to create an issue to tell us
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span.SetTag("status", ctx.Output.Status)
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span.SetTag("method", ctx.Input.Method())
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span.SetTag("route", ctx.Input.GetData("RouterPattern"))
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if builder.CustomSpanFunc != nil {
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builder.CustomSpanFunc(span, ctx)
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}
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}
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}
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