1 files changed, 109 insertions, 0 deletions
diff --git a/modules/web/routing/logger.go b/modules/web/routing/logger.go
new file mode 100644
index 00000000..5f3a7592
--- /dev/null
+++ b/modules/web/routing/logger.go
@@ -0,0 +1,109 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package routing
+
+import (
+	"net/http"
+	"strings"
+	"time"
+
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/web/types"
+)
+
+// NewLoggerHandler is a handler that will log routing to the router log taking account of
+// routing information
+func NewLoggerHandler() func(next http.Handler) http.Handler {
+	manager := requestRecordsManager{
+		requestRecords: map[uint64]*requestRecord{},
+	}
+	manager.startSlowQueryDetector(3 * time.Second)
+
+	logger := log.GetLogger("router")
+	manager.print = logPrinter(logger)
+	return manager.handler
+}
+
+var (
+	startMessage          = log.NewColoredValue("started  ", log.DEBUG.ColorAttributes()...)
+	slowMessage           = log.NewColoredValue("slow     ", log.WARN.ColorAttributes()...)
+	pollingMessage        = log.NewColoredValue("polling  ", log.INFO.ColorAttributes()...)
+	failedMessage         = log.NewColoredValue("failed   ", log.WARN.ColorAttributes()...)
+	completedMessage      = log.NewColoredValue("completed", log.INFO.ColorAttributes()...)
+	unknownHandlerMessage = log.NewColoredValue("completed", log.ERROR.ColorAttributes()...)
+)
+
+func logPrinter(logger log.Logger) func(trigger Event, record *requestRecord) {
+	return func(trigger Event, record *requestRecord) {
+		if trigger == StartEvent {
+			if !logger.LevelEnabled(log.TRACE) {
+				// for performance, if the "started" message shouldn't be logged, we just return as early as possible
+				// developers can set the router log level to TRACE to get the "started" request messages.
+				return
+			}
+			// when a request starts, we have no information about the handler function information, we only have the request path
+			req := record.request
+			logger.Trace("router: %s %v %s for %s", startMessage, log.ColoredMethod(req.Method), req.RequestURI, req.RemoteAddr)
+			return
+		}
+
+		req := record.request
+
+		// Get data from the record
+		record.lock.Lock()
+		handlerFuncInfo := record.funcInfo.String()
+		isLongPolling := record.isLongPolling
+		isUnknownHandler := record.funcInfo == nil
+		panicErr := record.panicError
+		record.lock.Unlock()
+
+		if trigger == StillExecutingEvent {
+			message := slowMessage
+			logf := logger.Warn
+			if isLongPolling {
+				logf = logger.Info
+				message = pollingMessage
+			}
+			logf("router: %s %v %s for %s, elapsed %v @ %s",
+				message,
+				log.ColoredMethod(req.Method), req.RequestURI, req.RemoteAddr,
+				log.ColoredTime(time.Since(record.startTime)),
+				handlerFuncInfo,
+			)
+			return
+		}
+
+		if panicErr != nil {
+			logger.Warn("router: %s %v %s for %s, panic in %v @ %s, err=%v",
+				failedMessage,
+				log.ColoredMethod(req.Method), req.RequestURI, req.RemoteAddr,
+				log.ColoredTime(time.Since(record.startTime)),
+				handlerFuncInfo,
+				panicErr,
+			)
+			return
+		}
+
+		var status int
+		if v, ok := record.responseWriter.(types.ResponseStatusProvider); ok {
+			status = v.WrittenStatus()
+		}
+		logf := logger.Info
+		if strings.HasPrefix(req.RequestURI, "/assets/") {
+			logf = logger.Trace
+		}
+		message := completedMessage
+		if isUnknownHandler {
+			logf = logger.Error
+			message = unknownHandlerMessage
+		}
+
+		logf("router: %s %v %s for %s, %v %v in %v @ %s",
+			message,
+			log.ColoredMethod(req.Method), req.RequestURI, req.RemoteAddr,
+			log.ColoredStatus(status), log.ColoredStatus(status, http.StatusText(status)), log.ColoredTime(time.Since(record.startTime)),
+			handlerFuncInfo,
+		)
+	}
+}