forked from gitea/gitea
102 lines
2.8 KiB
Go
102 lines
2.8 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package context
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import (
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"bytes"
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"fmt"
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"net"
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"net/http"
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"strings"
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"text/template"
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"time"
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user_model "code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/web/middleware"
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)
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type routerLoggerOptions struct {
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req *http.Request
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Identity *string
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Start *time.Time
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ResponseWriter http.ResponseWriter
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Ctx map[string]interface{}
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RequestID *string
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}
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const keyOfRequestIDInTemplate = ".RequestID"
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// According to:
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// TraceId: A valid trace identifier is a 16-byte array with at least one non-zero byte
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// MD5 output is 16 or 32 bytes: md5-bytes is 16, md5-hex is 32
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// SHA1: similar, SHA1-bytes is 20, SHA1-hex is 40.
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// UUID is 128-bit, 32 hex chars, 36 ASCII chars with 4 dashes
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// So, we accept a Request ID with a maximum character length of 40
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const maxRequestIDByteLength = 40
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func parseRequestIDFromRequestHeader(req *http.Request) string {
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requestID := "-"
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for _, key := range setting.Log.RequestIDHeaders {
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if req.Header.Get(key) != "" {
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requestID = req.Header.Get(key)
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break
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}
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}
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if len(requestID) > maxRequestIDByteLength {
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requestID = fmt.Sprintf("%s...", requestID[:maxRequestIDByteLength])
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}
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return requestID
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}
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// AccessLogger returns a middleware to log access logger
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func AccessLogger() func(http.Handler) http.Handler {
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logger := log.GetLogger("access")
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needRequestID := len(setting.Log.RequestIDHeaders) > 0 && strings.Contains(setting.Log.AccessLogTemplate, keyOfRequestIDInTemplate)
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logTemplate, _ := template.New("log").Parse(setting.Log.AccessLogTemplate)
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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start := time.Now()
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var requestID string
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if needRequestID {
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requestID = parseRequestIDFromRequestHeader(req)
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}
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reqHost, _, err := net.SplitHostPort(req.RemoteAddr)
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if err != nil {
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reqHost = req.RemoteAddr
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}
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next.ServeHTTP(w, req)
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rw := w.(ResponseWriter)
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identity := "-"
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data := middleware.GetContextData(req.Context())
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if signedUser, ok := data[middleware.ContextDataKeySignedUser].(*user_model.User); ok {
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identity = signedUser.Name
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}
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buf := bytes.NewBuffer([]byte{})
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err = logTemplate.Execute(buf, routerLoggerOptions{
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req: req,
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Identity: &identity,
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Start: &start,
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ResponseWriter: rw,
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Ctx: map[string]interface{}{
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"RemoteAddr": req.RemoteAddr,
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"RemoteHost": reqHost,
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"Req": req,
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},
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RequestID: &requestID,
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})
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if err != nil {
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log.Error("Could not execute access logger template: %v", err.Error())
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}
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logger.Info("%s", buf.String())
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})
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}
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}
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