137 lines
3.3 KiB
Go
137 lines
3.3 KiB
Go
package http
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import (
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"fmt"
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"net"
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"net/http"
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"strings"
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"time"
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"github.com/Dreamacro/clash/adapter/inbound"
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"github.com/Dreamacro/clash/common/cache"
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N "github.com/Dreamacro/clash/common/net"
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C "github.com/Dreamacro/clash/constant"
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authStore "github.com/Dreamacro/clash/listener/auth"
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"github.com/Dreamacro/clash/log"
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)
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func HandleConn(c net.Conn, in chan<- C.ConnContext, cache *cache.Cache[string, bool]) {
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client := newClient(c.RemoteAddr(), in)
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defer client.CloseIdleConnections()
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conn := N.NewBufferedConn(c)
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keepAlive := true
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trusted := cache == nil // disable authenticate if cache is nil
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for keepAlive {
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request, err := ReadRequest(conn.Reader())
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if err != nil {
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break
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}
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request.RemoteAddr = conn.RemoteAddr().String()
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keepAlive = strings.TrimSpace(strings.ToLower(request.Header.Get("Proxy-Connection"))) == "keep-alive"
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var resp *http.Response
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if !trusted {
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resp = authenticate(request, cache)
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trusted = resp == nil
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}
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if trusted {
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if request.Method == http.MethodConnect {
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// Manual writing to support CONNECT for http 1.0 (workaround for uplay client)
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if _, err = fmt.Fprintf(conn, "HTTP/%d.%d %03d %s\r\n\r\n", request.ProtoMajor, request.ProtoMinor, http.StatusOK, "Connection established"); err != nil {
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break // close connection
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}
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in <- inbound.NewHTTPS(request, conn)
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return // hijack connection
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}
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host := request.Header.Get("Host")
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if host != "" {
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request.Host = host
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}
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request.RequestURI = ""
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if isUpgradeRequest(request) {
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handleUpgrade(conn, request, in)
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return // hijack connection
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}
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removeHopByHopHeaders(request.Header)
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removeExtraHTTPHostPort(request)
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if request.URL.Scheme == "" || request.URL.Host == "" {
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resp = responseWith(request, http.StatusBadRequest)
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} else {
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resp, err = client.Do(request)
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if err != nil {
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resp = responseWith(request, http.StatusBadGateway)
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}
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}
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removeHopByHopHeaders(resp.Header)
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}
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if keepAlive {
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resp.Header.Set("Proxy-Connection", "keep-alive")
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resp.Header.Set("Connection", "keep-alive")
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resp.Header.Set("Keep-Alive", "timeout=4")
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}
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resp.Close = !keepAlive
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err = resp.Write(conn)
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if err != nil {
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break // close connection
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}
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}
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conn.Close()
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}
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func authenticate(request *http.Request, cache *cache.Cache[string, bool]) *http.Response {
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authenticator := authStore.Authenticator()
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if authenticator != nil {
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credential := parseBasicProxyAuthorization(request)
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if credential == "" {
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resp := responseWith(request, http.StatusProxyAuthRequired)
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resp.Header.Set("Proxy-Authenticate", "Basic")
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return resp
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}
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var authed bool
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if authed = cache.Get(credential); !authed {
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user, pass, err := decodeBasicProxyAuthorization(credential)
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authed = err == nil && authenticator.Verify(user, pass)
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cache.Put(credential, authed, time.Minute)
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}
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if !authed {
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log.Infoln("Auth failed from %s", request.RemoteAddr)
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return responseWith(request, http.StatusForbidden)
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}
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}
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return nil
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}
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func responseWith(request *http.Request, statusCode int) *http.Response {
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return &http.Response{
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StatusCode: statusCode,
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Status: http.StatusText(statusCode),
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Proto: request.Proto,
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ProtoMajor: request.ProtoMajor,
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ProtoMinor: request.ProtoMinor,
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Header: http.Header{},
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}
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}
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