feat: Inital commit

vendor/github.com/gocolly/colly/v2/debug/logdebugger.go

@@ -0,0 +1,54 @@
+// Copyright 2018 Adam Tauber
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package debug
+
+import (
+	"io"
+	"log"
+	"os"
+	"sync/atomic"
+	"time"
+)
+
+// LogDebugger is the simplest debugger which prints log messages to the STDERR
+type LogDebugger struct {
+	// Output is the log destination, anything can be used which implements them
+	// io.Writer interface. Leave it blank to use STDERR
+	Output io.Writer
+	// Prefix appears at the beginning of each generated log line
+	Prefix string
+	// Flag defines the logging properties.
+	Flag    int
+	logger  *log.Logger
+	counter int32
+	start   time.Time
+}
+
+// Init initializes the LogDebugger
+func (l *LogDebugger) Init() error {
+	l.counter = 0
+	l.start = time.Now()
+	if l.Output == nil {
+		l.Output = os.Stderr
+	}
+	l.logger = log.New(l.Output, l.Prefix, l.Flag)
+	return nil
+}
+
+// Event receives Collector events and prints them to STDERR
+func (l *LogDebugger) Event(e *Event) {
+	i := atomic.AddInt32(&l.counter, 1)
+	l.logger.Printf("[%06d] %d [%6d - %s] %q (%s)\n", i, e.CollectorID, e.RequestID, e.Type, e.Values, time.Since(l.start))
+}