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404.go
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404.go
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/**
* Any code, applications, scripts, templates, proofs of concept,
* documentation and other items are provided for illustration purposes only.
*
* (C) Copyright 2017 Ryan
*
* 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 main
import (
"encoding/json"
"io"
"math/rand"
"net/http"
"os"
"strconv"
"syscall"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/kinesis"
log "github.com/sirupsen/logrus"
)
var kinesisStreamName = aws.String(os.Getenv("KINESIS_STREAM_NAME"))
type NotFoundEvent struct {
Referrer string `json:"referrer"`
Time int64 `json:"time"`
}
func main() {
// Test failure of the container
/*
go func() {
time.Sleep(5 * time.Minute)
os.Exit(1)
}()
*/
log.SetFormatter(&log.JSONFormatter{})
log.SetOutput(os.Stdout)
random := rand.New(rand.NewSource(time.Now().UnixNano()))
session := session.Must(session.NewSession(&aws.Config{
Region: aws.String(os.Getenv("AWS_REGION")),
}))
svc := kinesis.New(session)
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
//time.Sleep(100 * time.Hour)
w.WriteHeader(http.StatusNotFound)
io.WriteString(w, "404 Not Found - ok")
// Test to validate log entries are being sent to CloudWatch Logs
log.WithFields(log.Fields{"referrer": r.Referer()}).Info("404 Not Found")
if r.Referer() == "" {
return
}
notFoundJson, err := json.Marshal(&NotFoundEvent{Referrer: r.Referer(), Time: currentTimeInMillis()})
if err != nil {
log.WithFields(log.Fields{"error": err}).Error("Cannot convert JSON")
return
}
go func(notFoundJson []byte) {
_, err = svc.PutRecord(&kinesis.PutRecordInput{
Data: notFoundJson,
PartitionKey: aws.String(strconv.Itoa(random.Int())),
StreamName: kinesisStreamName,
})
if err != nil {
log.WithFields(log.Fields{"error": err}).Error("Unable to insert record in Kinesis Stream")
}
}(notFoundJson)
})
http.ListenAndServe(":80", nil)
}
func currentTimeInMillis() int64 {
tv := new(syscall.Timeval)
syscall.Gettimeofday(tv)
return (int64(tv.Sec)*1e3 + int64(tv.Usec)/1e3)
}