mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-06-10 09:50:43 +00:00
Enhance http outbound
1. Enables http outbound to set up a HTTP tunnel above HTTP/1.1, HTTP/1.1 over TLS, or HTTP/2 over TLS. Previously it only works for plain HTTP/1.1 2. In setting up CONNECT tunnel, replaces handcrafted request with standard http.Request
This commit is contained in:
Darhwa
Darhwa
parent
36ff6bb903
commit
d29370a654
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@ -3,10 +3,15 @@
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package http
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import (
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"bufio"
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"context"
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"encoding/base64"
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"io"
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"strings"
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"net/http"
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"net/url"
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"sync"
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"golang.org/x/net/http2"
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"v2ray.com/core"
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"v2ray.com/core/common"
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@ -20,6 +25,7 @@ import (
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"v2ray.com/core/features/policy"
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"v2ray.com/core/transport"
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"v2ray.com/core/transport/internet"
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"v2ray.com/core/transport/internet/tls"
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)
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type Client struct {
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@ -27,6 +33,16 @@ type Client struct {
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policyManager policy.Manager
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}
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type h2Conn struct {
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rawConn net.Conn
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h2Conn *http2.ClientConn
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}
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var (
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cachedH2Mutex sync.Mutex
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cachedH2Conns map[net.Destination]h2Conn
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)
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// NewClient create a new http client based on the given config.
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func NewClient(ctx context.Context, config *ClientConfig) (*Client, error) {
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serverList := protocol.NewServerList()
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@ -54,25 +70,26 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
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if outbound == nil || !outbound.Target.IsValid() {
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return newError("target not specified.")
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}
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destination := outbound.Target
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target := outbound.Target
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if destination.Network == net.Network_UDP {
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if target.Network == net.Network_UDP {
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return newError("UDP is not supported by HTTP outbound")
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}
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var server *protocol.ServerSpec
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var user *protocol.MemoryUser
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var conn internet.Connection
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if err := retry.ExponentialBackoff(5, 100).On(func() error {
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server = c.serverPicker.PickServer()
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server := c.serverPicker.PickServer()
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dest := server.Destination()
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rawConn, err := dialer.Dial(ctx, dest)
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if err != nil {
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return err
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}
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conn = rawConn
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user = server.PickUser()
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targetAddr := target.NetAddr()
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return nil
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netConn, err := setUpHttpTunnel(ctx, dest, targetAddr, user, dialer)
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if netConn != nil {
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conn = internet.Connection(netConn)
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}
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return err
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}); err != nil {
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return newError("failed to find an available destination").Base(err)
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}
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@ -84,16 +101,10 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
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}()
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p := c.policyManager.ForLevel(0)
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user := server.PickUser()
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if user != nil {
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p = c.policyManager.ForLevel(user.Level)
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}
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if err := setUpHttpTunnel(conn, conn, &destination, user); err != nil {
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return err
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}
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ctx, cancel := context.WithCancel(ctx)
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timer := signal.CancelAfterInactivity(ctx, cancel, p.Timeouts.ConnectionIdle)
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@ -115,30 +126,164 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
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}
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// setUpHttpTunnel will create a socket tunnel via HTTP CONNECT method
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func setUpHttpTunnel(reader io.Reader, writer io.Writer, destination *net.Destination, user *protocol.MemoryUser) error {
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var headers []string
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destNetAddr := destination.NetAddr()
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headers = append(headers, "CONNECT "+destNetAddr+" HTTP/1.1")
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headers = append(headers, "Host: "+destNetAddr)
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func setUpHttpTunnel(ctx context.Context, dest net.Destination, target string, user *protocol.MemoryUser, dialer internet.Dialer) (net.Conn, error) {
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req := (&http.Request{
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Method: "CONNECT",
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URL: &url.URL{Host: target},
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Header: make(http.Header),
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Host: target,
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}).WithContext(ctx)
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if user != nil && user.Account != nil {
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account := user.Account.(*Account)
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auth := account.GetUsername() + ":" + account.GetPassword()
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headers = append(headers, "Proxy-Authorization: Basic "+base64.StdEncoding.EncodeToString([]byte(auth)))
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req.Header.Set("Proxy-Authorization", "Basic "+base64.StdEncoding.EncodeToString([]byte(auth)))
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}
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headers = append(headers, "Proxy-Connection: Keep-Alive")
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req.Header.Set("Proxy-Connection", "Keep-Alive")
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b := buf.New()
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b.WriteString(strings.Join(headers, "\r\n") + "\r\n\r\n")
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if err := buf.WriteAllBytes(writer, b.Bytes()); err != nil {
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return err
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connectHttp1 := func(rawConn net.Conn) (net.Conn, error) {
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req.Proto = "HTTP/1.1"
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req.ProtoMajor = 1
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req.ProtoMinor = 1
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err := req.Write(rawConn)
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if err != nil {
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rawConn.Close()
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return nil, err
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}
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resp, err := http.ReadResponse(bufio.NewReader(rawConn), req)
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if err != nil {
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rawConn.Close()
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return nil, err
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}
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if resp.StatusCode != http.StatusOK {
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rawConn.Close()
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return nil, newError("Proxy responded with non 200 code: " + resp.Status)
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}
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return rawConn, nil
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}
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b.Clear()
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if _, err := b.ReadFrom(reader); err != nil {
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return err
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connectHttp2 := func(rawConn net.Conn, h2clientConn *http2.ClientConn) (net.Conn, error) {
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req.Proto = "HTTP/2.0"
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req.ProtoMajor = 2
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req.ProtoMinor = 0
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pr, pw := io.Pipe()
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req.Body = pr
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resp, err := h2clientConn.RoundTrip(req)
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if err != nil {
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rawConn.Close()
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return nil, err
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}
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if resp.StatusCode != http.StatusOK {
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rawConn.Close()
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return nil, newError("Proxy responded with non 200 code: " + resp.Status)
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}
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return newHttp2Conn(rawConn, pw, resp.Body), nil
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}
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return nil
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cachedH2Mutex.Lock()
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defer cachedH2Mutex.Unlock()
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if cachedConn, found := cachedH2Conns[dest]; found {
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if cachedConn.rawConn != nil && cachedConn.h2Conn != nil {
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rc := cachedConn.rawConn
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cc := cachedConn.h2Conn
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if cc.CanTakeNewRequest() {
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proxyConn, err := connectHttp2(rc, cc)
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if err != nil {
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return nil, err
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}
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return proxyConn, nil
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}
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}
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}
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rawConn, err := dialer.Dial(ctx, dest)
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if err != nil {
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return nil, err
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}
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nextProto := ""
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if tlsConn, ok := rawConn.(*tls.Conn); ok {
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if err := tlsConn.Handshake(); err != nil {
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rawConn.Close()
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return nil, err
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}
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nextProto = tlsConn.ConnectionState().NegotiatedProtocol
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}
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switch nextProto {
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case "":
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fallthrough
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case "http/1.1":
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return connectHttp1(rawConn)
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case "h2":
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t := http2.Transport{}
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h2clientConn, err := t.NewClientConn(rawConn)
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if err != nil {
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rawConn.Close()
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return nil, err
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}
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proxyConn, err := connectHttp2(rawConn, h2clientConn)
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if err != nil {
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rawConn.Close()
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return nil, err
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}
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if cachedH2Conns == nil {
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cachedH2Conns = make(map[net.Destination]h2Conn)
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}
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cachedH2Conns[dest] = h2Conn{
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rawConn: rawConn,
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h2Conn: h2clientConn,
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}
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return proxyConn, err
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default:
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return nil, newError("negotiated unsupported application layer protocol: " + nextProto)
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}
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}
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func newHttp2Conn(c net.Conn, pipedReqBody *io.PipeWriter, respBody io.ReadCloser) net.Conn {
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return &http2Conn{Conn: c, in: pipedReqBody, out: respBody}
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}
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type http2Conn struct {
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net.Conn
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in *io.PipeWriter
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out io.ReadCloser
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}
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func (h *http2Conn) Read(p []byte) (n int, err error) {
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return h.out.Read(p)
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}
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func (h *http2Conn) Write(p []byte) (n int, err error) {
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return h.in.Write(p)
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}
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func (h *http2Conn) Close() error {
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h.in.Close()
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return h.out.Close()
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}
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func (h *http2Conn) CloseConn() error {
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return h.Conn.Close()
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}
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func (h *http2Conn) CloseWrite() error {
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return h.in.Close()
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}
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func (h *http2Conn) CloseRead() error {
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return h.out.Close()
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}
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func init() {
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@ -14,25 +14,25 @@ import (
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//go:generate errorgen
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var (
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_ buf.Writer = (*conn)(nil)
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_ buf.Writer = (*Conn)(nil)
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)
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type conn struct {
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type Conn struct {
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*tls.Conn
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}
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func (c *conn) WriteMultiBuffer(mb buf.MultiBuffer) error {
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func (c *Conn) WriteMultiBuffer(mb buf.MultiBuffer) error {
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mb = buf.Compact(mb)
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mb, err := buf.WriteMultiBuffer(c, mb)
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buf.ReleaseMulti(mb)
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return err
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}
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func (c *conn) HandshakeAddress() net.Address {
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func (c *Conn) HandshakeAddress() net.Address {
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if err := c.Handshake(); err != nil {
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return nil
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}
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state := c.Conn.ConnectionState()
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state := c.ConnectionState()
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if state.ServerName == "" {
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return nil
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}
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@ -42,7 +42,7 @@ func (c *conn) HandshakeAddress() net.Address {
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// Client initiates a TLS client handshake on the given connection.
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func Client(c net.Conn, config *tls.Config) net.Conn {
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tlsConn := tls.Client(c, config)
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return &conn{Conn: tlsConn}
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return &Conn{Conn: tlsConn}
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}
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func copyConfig(c *tls.Config) *utls.Config {
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@ -63,5 +63,5 @@ func UClient(c net.Conn, config *tls.Config) net.Conn {
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// Server initiates a TLS server handshake on the given connection.
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func Server(c net.Conn, config *tls.Config) net.Conn {
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tlsConn := tls.Server(c, config)
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return &conn{Conn: tlsConn}
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return &Conn{Conn: tlsConn}
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}
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