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proxy.go
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proxy.go
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package proxy
import (
"bytes"
"crypto/tls"
"fmt"
"io"
"log"
"net"
"net/http"
"net/url"
"runtime"
"strconv"
"strings"
"time"
"github.com/cnsilvan/UnblockNeteaseMusic/common"
"github.com/cnsilvan/UnblockNeteaseMusic/config"
"github.com/cnsilvan/UnblockNeteaseMusic/network"
"github.com/cnsilvan/UnblockNeteaseMusic/processor"
"github.com/cnsilvan/UnblockNeteaseMusic/version"
)
type HttpHandler struct{}
var localhost = map[string]int{}
func InitProxy() {
log.Println("-------------------Init Proxy-------------------")
// address := "0.0.0.0:"
addrs, err := net.InterfaceAddrs()
if err != nil {
panic(err)
}
for _, address := range addrs {
if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
if ipnet.IP.To4() != nil {
localhost[ipnet.IP.String()] = 1
}
if ipnet.IP.To16() != nil {
localhost[ipnet.IP.To16().String()] = 1
}
}
}
var localhostKey []string
for k, _ := range localhost {
localhostKey = append(localhostKey, k)
}
log.Println("Http Proxy:")
log.Println(strings.Join(localhostKey, " , "))
go startTlsServer(fmt.Sprintf("%s:%d", *config.Addr, *config.TLSPort), *config.CertFile, *config.KeyFile, &HttpHandler{})
go startServer(fmt.Sprintf("%s:%d", *config.Addr, *config.Port), &HttpHandler{})
}
func (h *HttpHandler) ServeHTTP(resp http.ResponseWriter, request *http.Request) {
defer func() {
if r := recover(); r != nil {
log.Println("Recover panic : ", r)
}
}()
//printMemStats()
requestURI := request.RequestURI
if i := strings.Index(requestURI, "/unblockmusic/"); len(requestURI) > 0 && i != -1 {
realMusicUrl := requestURI[i+len("/unblockmusic/"):]
// log.Printf("Download:%s(%s)\n", realMusicUrl, request.Method)
realURI, err := url.Parse(realMusicUrl)
if err != nil {
log.Println("url.Parse error:", err)
return
}
response, err := network.Request(&network.ClientRequest{
Method: request.Method,
RemoteUrl: realMusicUrl,
Host: realURI.Host,
Header: request.Header,
Body: request.Body,
Cookies: request.Cookies(),
ForbiddenEncodeQuery: true,
Proxy: false,
})
if err != nil {
log.Println("network.Request error:", err)
return
}
defer response.Body.Close()
for name, values := range response.Header {
resp.Header()[name] = values
}
//fix ios 7.0.20
resp.Header().Del("Keep-Alive")
if response.StatusCode == 200 && (len(request.Header.Get("range")) > 0 || len(response.Header.Get("content-range")) > 0) {
response.StatusCode = 206
}
resp.WriteHeader(response.StatusCode)
_, err = io.Copy(resp, response.Body)
if err != nil {
//log.Println("io.Copy error:", err)
return
}
} else {
hostStr := request.URL.Host
if len(hostStr) == 0 {
hostStr = request.Host
}
if len(request.URL.Port()) > 0 && strings.Contains(hostStr, ":"+request.URL.Port()) {
hostStr = strings.Replace(hostStr, ":"+request.URL.Port(), "", 1)
}
path := request.URL.Path
rawQuery := request.URL.RawQuery
uriBytes := []byte(path)
left := uriBytes[:(len(uriBytes) / 2)]
right := uriBytes[len(uriBytes)/2:]
scheme := "http://"
if request.TLS != nil || request.URL.Port() == "443" {
scheme = "https://"
}
if len(request.URL.Scheme) > 0 {
scheme = request.URL.Scheme + "://"
}
infinite := false
for k, _ := range localhost {
if strings.Contains(hostStr, k) {
infinite = true
break
}
}
if infinite || strings.Contains(hostStr, "localhost") ||
strings.Contains(hostStr, "127.0.0.1") ||
strings.Contains(hostStr, "0.0.0.0") ||
(len(path) > 1 && strings.Count(path, "/") > 1 && bytes.EqualFold(left, right)) {
//cause infinite loop
requestURI = scheme + request.Host
pathA := ""
if bytes.EqualFold(left, right) {
pathA = string(left)
} else {
pathA = string(uriBytes)
}
requestURI += pathA
log.Printf("Abandon:%s\n", requestURI)
for strings.HasPrefix(pathA, "/") {
pathA = strings.TrimPrefix(pathA, "/")
}
// log.Println(scheme, pathA)
requestURI = scheme + pathA
fixedUrl, err := url.Parse(requestURI)
if err != nil {
log.Printf("Try Fix :%s,error:%s\n", requestURI, err)
resp.WriteHeader(200)
resp.Write([]byte(version.AppVersion()))
return
} else if fixedUrl.Host == "" || fixedUrl.Host == "favicon.ico" {
resp.WriteHeader(200)
resp.Write([]byte(version.AppVersion()))
return
}
log.Printf("Try Fix:%s\n", requestURI)
request.URL = fixedUrl
hostStr = fixedUrl.Host
path = fixedUrl.Path
rawQuery = fixedUrl.RawQuery
if len(request.URL.Port()) > 0 && strings.Contains(hostStr, ":"+request.URL.Port()) {
hostStr = strings.Replace(hostStr, ":"+request.URL.Port(), "", 1)
}
}
request.Host = hostStr
if proxyDomain, ok := common.ProxyDomain[hostStr]; ok && !strings.Contains(path, "stream") {
if request.Method == http.MethodConnect {
proxyConnectLocalhost(resp, request)
} else {
if *config.Mode != 1 {
proxyDomain = hostStr
} else if hostIp, ok := common.HostDomain[hostStr]; ok {
proxyDomain = hostIp
} else {
proxyDomain = hostStr
}
if len(request.URL.Port()) > 0 {
proxyDomain = proxyDomain + ":" + request.URL.Port()
}
urlString := scheme + proxyDomain + path
if len(rawQuery) > 0 {
urlString = urlString + "?" + rawQuery
}
log.Printf("Transport:%s(%s)(%s)\n", urlString, request.Host, request.Method)
netease := processor.RequestBefore(request)
if netease == nil {
log.Println("Request Blocked:", urlString)
return
}
//log.Printf("{path:%s,web:%v,encrypted:%v}\n", netease.Path, netease.Web, netease.Encrypted)
response, err := processor.Request(request, urlString)
if err != nil {
log.Println("Request error:", urlString)
return
}
defer response.Body.Close()
processor.RequestAfter(request, response, netease)
for name, values := range response.Header {
resp.Header()[name] = values
}
resp.WriteHeader(response.StatusCode)
_, err = io.Copy(resp, response.Body)
if err != nil {
log.Println("io.Copy error:", err)
return
}
defer response.Body.Close()
}
} else {
if request.Method == http.MethodConnect {
proxyConnect(resp, request)
} else {
if proxyDomain, ok := common.HostDomain[hostStr]; ok {
if *config.Mode != 1 {
proxyDomain = hostStr
}
if len(request.URL.Port()) > 0 {
proxyDomain = proxyDomain + ":" + request.URL.Port()
}
requestURI = scheme + proxyDomain + path
} else {
if len(request.URL.Port()) > 0 {
hostStr = hostStr + ":" + request.URL.Port()
}
requestURI = scheme + hostStr + path
}
if len(rawQuery) > 0 {
requestURI = requestURI + "?" + rawQuery
}
for hostDomain, _ := range common.HostDomain {
if strings.Contains(request.Referer(), hostDomain) {
request.Header.Set("referer", request.Host)
break
}
}
log.Printf("Direct:%s(%s)(%s)\n", requestURI, request.Host, request.Method)
response, err := network.Request(&network.ClientRequest{
Method: request.Method,
RemoteUrl: requestURI,
Host: request.Host,
Header: request.Header,
Body: request.Body,
Cookies: request.Cookies(),
Proxy: true,
})
if err != nil {
log.Println("network.Request error:", err)
return
}
defer response.Body.Close()
for name, values := range response.Header {
resp.Header()[name] = values
}
resp.WriteHeader(response.StatusCode)
_, err = io.Copy(resp, response.Body)
if err != nil {
log.Println("io.Copy error:", err)
return
}
}
}
}
}
func proxyConnectLocalhost(rw http.ResponseWriter, req *http.Request) {
log.Printf("Local Received request %s %s %s\n",
req.Method,
req.Host,
req.RemoteAddr,
)
hij, ok := rw.(http.Hijacker)
if !ok {
log.Println("HTTP Server does not support hijacking")
}
client, _, err := hij.Hijack()
if err != nil {
log.Println(err)
return
}
localUrl := "localhost:"
var server net.Conn
port := req.URL.Port()
// log.Println("HTTP Server support hijacking :", req.URL.String())
if port == "80" || port == strconv.Itoa(*config.Port) {
localUrl = localUrl + strconv.Itoa(*config.Port)
server, err = net.DialTimeout("tcp", localUrl, 15*time.Second)
} else if port == "443" || port == strconv.Itoa(*config.TLSPort) {
localUrl = localUrl + strconv.Itoa(*config.TLSPort)
server, err = tls.Dial("tcp", localUrl, &tls.Config{InsecureSkipVerify: true})
}
if err != nil {
log.Println(err)
return
}
client.Write([]byte("HTTP/1.0 200 Connection Established\r\n\r\n"))
go io.Copy(server, client)
io.Copy(client, server)
defer client.Close()
defer server.Close()
}
func proxyConnect(rw http.ResponseWriter, req *http.Request) {
log.Printf("Received request %s %s %s\n",
req.Method,
req.Host,
req.RemoteAddr,
)
if req.Method != "CONNECT" {
rw.WriteHeader(http.StatusMethodNotAllowed)
rw.Write([]byte("This is a http tunnel proxy, only CONNECT method is allowed."))
return
}
host := req.URL.Host
hij, ok := rw.(http.Hijacker)
if !ok {
log.Println("HTTP Server does not support hijacking")
}
client, _, err := hij.Hijack()
if err != nil {
log.Println(err)
return
}
server, err := net.DialTimeout("tcp", host, 15*time.Second)
if err != nil {
log.Println(err)
return
}
client.Write([]byte("HTTP/1.0 200 Connection Established\r\n\r\n"))
go io.Copy(server, client)
io.Copy(client, server)
defer client.Close()
defer server.Close()
}
func startTlsServer(addr, certFile, keyFile string, handler http.Handler) {
log.Printf("starting TLS Server %s\n", addr)
s := &http.Server{
Addr: addr,
Handler: handler,
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
MaxHeaderBytes: 1 << 20,
}
err := s.ListenAndServeTLS(certFile, keyFile)
if err != nil {
panic(err)
}
}
func startServer(addr string, handler http.Handler) {
log.Printf("starting Server %s\n", addr)
s := &http.Server{
Addr: addr,
Handler: handler,
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
MaxHeaderBytes: 1 << 20,
}
err := s.ListenAndServe()
if err != nil {
panic(err)
}
}
func printMemStats() {
var m runtime.MemStats
runtime.ReadMemStats(&m)
log.Printf("Alloc = %v TotalAlloc = %v Sys = %v NumGC = %v HeapInuse= %v \n", m.Alloc/1024, m.TotalAlloc/1024, m.Sys/1024, m.NumGC, m.HeapInuse/1024)
}