/
main.go
211 lines (181 loc) · 4.42 KB
/
main.go
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package main
import (
"bytes"
"crypto/rand"
"crypto/rsa"
"crypto/tls"
"crypto/x509"
"crypto/x509/pkix"
"encoding/binary"
"encoding/pem"
"fmt"
"log"
"math/big"
"net"
"strconv"
"strings"
"time"
"github.com/boltdb/bolt"
)
func handler(conn net.Conn) {
conn.SetDeadline(time.Now().Add(time.Second))
buffer, request, line := make([]byte, 1024), bytes.Buffer{}, bytes.Buffer{}
contentLength, bodyLength, inBody := 0, 0, false
request.WriteString(conn.RemoteAddr().String())
request.WriteString("\r\n")
n, err := conn.Read(buffer)
process:
for err == nil {
for _, b := range buffer[:n] {
if inBody {
request.WriteByte(b)
bodyLength++
if bodyLength >= contentLength {
break process
}
} else {
line.WriteByte(b)
request.WriteByte(b)
if b == '\n' {
header := line.String()
length := len(header)
if header == "\r\n" {
if contentLength == 0 {
break process
}
inBody = true
} else if length > 2 {
parts := strings.Split(header[:length-2], ":")
if len(parts) == 2 && strings.TrimSpace(parts[0]) == "Content-Length" {
contentLength, _ = strconv.Atoi(strings.TrimSpace(parts[1]))
}
}
line.Reset()
}
}
}
n, err = conn.Read(buffer)
}
conn.Write([]byte("HTTP/1.1 200 OK\r\n\r\n"))
conn.Close()
fmt.Print(request.String())
tx, err := db.Begin(true)
if err != nil {
log.Println(err)
}
defer tx.Rollback()
traffic, err := tx.CreateBucketIfNotExists([]byte("traffic"))
if err != nil {
log.Println(err)
}
key := bytes.Buffer{}
stamp := time.Now()
key.Write(itob(uint64(stamp.Unix())))
key.Write(itob(uint64(stamp.Nanosecond())))
err = traffic.Put(key.Bytes(), request.Bytes())
if err != nil {
log.Println(err)
}
err = tx.Commit()
if err != nil {
log.Println(err)
}
}
func httpListener() {
listener, err := net.Listen("tcp", ":80")
if err != nil {
log.Fatal(err)
}
defer listener.Close()
for {
conn, err := listener.Accept()
if err != nil {
log.Println(err)
continue
}
go handler(conn)
}
}
//http://golang.org/src/pkg/crypto/tls/generate_cert.go
func generateCertificate(hosts []string) (cert, key []byte) {
private, err := rsa.GenerateKey(rand.Reader, 1024)
if err != nil {
log.Fatal(err)
}
before := time.Now()
after := before.Add(10 * 365 * 24 * time.Hour)
serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
if err != nil {
log.Fatalf("failed to generate serial number: %s", err)
}
template := x509.Certificate{
SerialNumber: serialNumber,
Subject: pkix.Name{
Organization: []string{"Acme Co"},
},
NotBefore: before,
NotAfter: after,
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
BasicConstraintsValid: true,
}
for _, h := range hosts {
if ip := net.ParseIP(h); ip != nil {
template.IPAddresses = append(template.IPAddresses, ip)
} else {
template.DNSNames = append(template.DNSNames, h)
}
}
template.IsCA = true
template.KeyUsage |= x509.KeyUsageCertSign
derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &private.PublicKey, private)
if err != nil {
log.Fatalf("Failed to create certificate: %s", err)
}
certOut := bytes.Buffer{}
pem.Encode(&certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
keyOut := bytes.Buffer{}
pem.Encode(&keyOut, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(private)})
return certOut.Bytes(), keyOut.Bytes()
}
//https://gist.github.com/denji/12b3a568f092ab951456
func httpsListener() {
cert, key := generateCertificate([]string{"pointlander.info", "pointlander.net"})
cer, err := tls.X509KeyPair(cert, key)
if err != nil {
log.Fatal(err)
}
config := &tls.Config{Certificates: []tls.Certificate{cer}}
listener, err := tls.Listen("tcp", ":443", config)
if err != nil {
log.Fatal(err)
}
defer listener.Close()
for {
conn, err := listener.Accept()
if err != nil {
log.Println(err)
continue
}
go handler(conn)
}
}
var db *bolt.DB
func itob(i uint64) []byte {
b := make([]byte, 8)
binary.BigEndian.PutUint64(b, i)
return b
}
func btoi(b []byte) uint64 {
return binary.BigEndian.Uint64(b)
}
func main() {
var err error
db, err = bolt.Open("traffic.db", 0600, nil)
if err != nil {
log.Fatal(err)
}
go httpListener()
httpsListener()
}