forked from Shiloh/githaven
5bf8d5445e
Make router logger more friendly, show the related function name/file/line. [BREAKING] This PR substantially changes the logging format of the router logger. If you use this logging for monitoring e.g. fail2ban you will need to update this to match the new format.
123 lines
3.2 KiB
Go
123 lines
3.2 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package routing
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import (
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"context"
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"net/http"
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"sync"
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"time"
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"code.gitea.io/gitea/modules/graceful"
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)
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// Event indicates when the printer is triggered
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type Event int
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const (
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//StartEvent at the beginning of a request
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StartEvent Event = iota
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//StillExecutingEvent the request is still executing
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StillExecutingEvent
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//EndEvent the request has ended (either completed or failed)
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EndEvent
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)
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// Printer is used to output the log for a request
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type Printer func(trigger Event, record *requestRecord)
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type requestRecordsManager struct {
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print Printer
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lock sync.Mutex
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requestRecords map[uint64]*requestRecord
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count uint64
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}
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func (manager *requestRecordsManager) startSlowQueryDetector(threshold time.Duration) {
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go graceful.GetManager().RunWithShutdownContext(func(baseCtx context.Context) {
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// This go-routine checks all active requests every second.
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// If a request has been running for a long time (eg: /user/events), we also print a log with "still-executing" message
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// After the "still-executing" log is printed, the record will be removed from the map to prevent from duplicated logs in future
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// We do not care about accurate duration here. It just does the check periodically, 0.5s or 1.5s are all OK.
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t := time.NewTicker(time.Second)
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for {
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select {
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case <-baseCtx.Done():
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return
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case <-t.C:
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now := time.Now()
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var slowRequests []*requestRecord
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// find all slow requests with lock
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manager.lock.Lock()
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for index, record := range manager.requestRecords {
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if now.Sub(record.startTime) < threshold {
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continue
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}
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slowRequests = append(slowRequests, record)
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delete(manager.requestRecords, index)
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}
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manager.lock.Unlock()
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// print logs for slow requests
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for _, record := range slowRequests {
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manager.print(StillExecutingEvent, record)
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}
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}
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}
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})
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}
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func (manager *requestRecordsManager) handler(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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record := &requestRecord{
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startTime: time.Now(),
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request: req,
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responseWriter: w,
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}
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// generate a record index an insert into the map
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manager.lock.Lock()
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record.index = manager.count
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manager.count++
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manager.requestRecords[record.index] = record
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manager.lock.Unlock()
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defer func() {
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// just in case there is a panic. now the panics are all recovered in middleware.go
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localPanicErr := recover()
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if localPanicErr != nil {
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record.lock.Lock()
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record.panicError = localPanicErr
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record.lock.Unlock()
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}
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// remove from the record map
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manager.lock.Lock()
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delete(manager.requestRecords, record.index)
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manager.lock.Unlock()
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// log the end of the request
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manager.print(EndEvent, record)
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if localPanicErr != nil {
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// the panic wasn't recovered before us, so we should pass it up, and let the framework handle the panic error
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panic(localPanicErr)
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}
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}()
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req = req.WithContext(context.WithValue(req.Context(), contextKey, record))
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manager.print(StartEvent, record)
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next.ServeHTTP(w, req)
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})
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}
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