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package addon
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import (
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"encoding/json"
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"net/http"
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"sync"
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"text/template"
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"github.com/gorilla/websocket"
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"github.com/lqqyt2423/go-mitmproxy/flow"
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"github.com/sirupsen/logrus"
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)
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func (web *WebAddon) echo(w http.ResponseWriter, r *http.Request) {
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c, err := web.upgrader.Upgrade(w, r, nil)
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if err != nil {
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web.log.Print("upgrade:", err)
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return
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}
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web.addConn(c)
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defer func() {
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web.removeConn(c)
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c.Close()
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}()
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for {
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mt, message, err := c.ReadMessage()
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if err != nil {
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web.log.Println("read:", err)
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break
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}
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web.log.Printf("recv: %s", message)
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err = c.WriteMessage(mt, message)
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if err != nil {
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web.log.Println("write:", err)
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break
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}
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}
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}
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func home(w http.ResponseWriter, r *http.Request) {
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homeTemplate.Execute(w, "ws://"+r.Host+"/echo")
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}
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type WebAddon struct {
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Base
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addr string
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upgrader *websocket.Upgrader
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serverMux *http.ServeMux
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server *http.Server
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log *logrus.Entry
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conns []*websocket.Conn
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connsMu sync.RWMutex
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}
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type message struct {
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On string `json:"on"`
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Flow *flow.Flow `json:"flow"`
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}
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func newMessage(on string, f *flow.Flow) *message {
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return &message{
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On: on,
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Flow: f,
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}
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}
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func NewWebAddon() *WebAddon {
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web := new(WebAddon)
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web.addr = ":9081"
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web.upgrader = &websocket.Upgrader{}
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web.serverMux = new(http.ServeMux)
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web.serverMux.HandleFunc("/echo", web.echo)
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web.serverMux.HandleFunc("/", home)
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web.server = &http.Server{Addr: web.addr, Handler: web.serverMux}
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web.log = log.WithField("in", "WebAddon")
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web.conns = make([]*websocket.Conn, 0)
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go func() {
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web.log.Infof("server start listen at %v\n", web.addr)
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err := web.server.ListenAndServe()
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web.log.Error(err)
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}()
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return web
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}
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func (web *WebAddon) addConn(c *websocket.Conn) {
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web.connsMu.Lock()
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web.conns = append(web.conns, c)
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web.connsMu.Unlock()
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}
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func (web *WebAddon) removeConn(conn *websocket.Conn) {
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web.connsMu.Lock()
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defer web.connsMu.Unlock()
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index := -1
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for i, c := range web.conns {
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if conn == c {
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index = i
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break
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}
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}
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if index == -1 {
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return
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}
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web.conns = append(web.conns[:index], web.conns[index+1:]...)
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}
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func (web *WebAddon) sendFlow(on string, f *flow.Flow) {
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web.connsMu.RLock()
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conns := web.conns
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web.connsMu.RUnlock()
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if len(conns) == 0 {
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return
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}
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msg := newMessage(on, f)
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b, err := json.Marshal(msg)
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if err != nil {
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web.log.Error(err)
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return
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}
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for _, c := range conns {
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c.WriteMessage(websocket.TextMessage, b)
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}
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}
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func (web *WebAddon) Request(f *flow.Flow) {
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web.sendFlow("request", f)
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}
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func (web *WebAddon) Response(f *flow.Flow) {
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web.sendFlow("response", f)
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}
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var homeTemplate = template.Must(template.New("").Parse(`
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<script>
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window.addEventListener("load", function(evt) {
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var output = document.getElementById("output");
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var input = document.getElementById("input");
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var ws;
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var print = function(message) {
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var d = document.createElement("div");
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d.textContent = message;
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output.appendChild(d);
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};
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document.getElementById("open").onclick = function(evt) {
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if (ws) {
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return false;
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}
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ws = new WebSocket("{{.}}");
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ws.onopen = function(evt) {
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print("OPEN");
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}
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ws.onclose = function(evt) {
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print("CLOSE");
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ws = null;
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}
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ws.onmessage = function(evt) {
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print("RESPONSE: " + evt.data);
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}
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ws.onerror = function(evt) {
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print("ERROR: " + evt.data);
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}
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return false;
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};
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document.getElementById("send").onclick = function(evt) {
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if (!ws) {
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return false;
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}
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print("SEND: " + input.value);
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ws.send(input.value);
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return false;
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};
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document.getElementById("close").onclick = function(evt) {
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if (!ws) {
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return false;
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}
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ws.close();
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return false;
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};
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});
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</script>
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</head>
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<body>
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<table>
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<tr><td valign="top" width="50%">
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<p>Click "Open" to create a connection to the server,
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"Send" to send a message to the server and "Close" to close the connection.
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You can change the message and send multiple times.
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<p>
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<form>
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<button id="open">Open</button>
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<button id="close">Close</button>
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<p><input id="input" type="text" value="Hello world!">
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<button id="send">Send</button>
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</form>
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</td><td valign="top" width="50%">
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<div id="output"></div>
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</td></tr></table>
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</body>
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</html>
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`))
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