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129 lines
2.4 KiB
Go
129 lines
2.4 KiB
Go
package web
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import (
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"encoding/json"
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"strings"
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"sync"
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"github.com/gorilla/websocket"
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"github.com/lqqyt2423/go-mitmproxy/flow"
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)
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type concurrentConn struct {
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conn *websocket.Conn
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mu sync.Mutex
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waitChans map[string]chan interface{}
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waitChansMu sync.Mutex
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interceptUri string
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}
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func newConn(c *websocket.Conn) *concurrentConn {
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return &concurrentConn{
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conn: c,
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waitChans: make(map[string]chan interface{}),
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}
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}
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func (c *concurrentConn) writeMessage(msg *message, f *flow.Flow) {
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if c.isIntercpt(f, msg) {
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msg.waitIntercept = 1
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}
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c.mu.Lock()
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err := c.conn.WriteMessage(websocket.BinaryMessage, msg.bytes())
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c.mu.Unlock()
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if err != nil {
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log.Error(err)
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return
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}
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if msg.waitIntercept == 1 {
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c.waitIntercept(f, msg)
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}
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}
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func (c *concurrentConn) readloop() {
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for {
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mt, data, err := c.conn.ReadMessage()
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if err != nil {
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log.Error(err)
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break
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}
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if mt != websocket.BinaryMessage {
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log.Warn("not BinaryMessage, skip")
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continue
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}
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msg := parseMessage(data)
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if msg == nil {
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log.Warn("parseMessage error, skip")
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continue
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}
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if msg.mType == messageTypeChangeInterceptUri {
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interceptUri := ""
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if len(msg.content) > 0 {
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interceptUri = string(msg.content)
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}
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c.interceptUri = interceptUri
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continue
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}
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if msg.mType == messageTypeChangeRequest {
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req := new(flow.Request)
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err := json.Unmarshal(msg.content, req)
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if err != nil {
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log.Error(err)
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continue
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}
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ch := c.initWaitChan(msg.id.String())
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go func(req *flow.Request, ch chan<- interface{}) {
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ch <- req
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}(req, ch)
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}
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}
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}
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func (c *concurrentConn) initWaitChan(key string) chan interface{} {
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c.waitChansMu.Lock()
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defer c.waitChansMu.Unlock()
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if ch, ok := c.waitChans[key]; ok {
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return ch
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}
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ch := make(chan interface{})
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c.waitChans[key] = ch
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return ch
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}
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// 是否拦截
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func (c *concurrentConn) isIntercpt(f *flow.Flow, after *message) bool {
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if after.mType != messageTypeRequest {
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return false
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}
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if c.interceptUri == "" {
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return false
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}
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if strings.Contains(f.Request.URL.String(), c.interceptUri) {
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return true
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}
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return false
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}
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// 拦截
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func (c *concurrentConn) waitIntercept(f *flow.Flow, after *message) {
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log.Infof("waiting Intercept: %s\n", f.Request.URL)
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ch := c.initWaitChan(f.Id.String())
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req := (<-ch).(*flow.Request)
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log.Infof("waited Intercept: %s\n", f.Request.URL)
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f.Request.Method = req.Method
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f.Request.URL = req.URL
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f.Request.Header = req.Header
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}
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