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SplitHTTP: Replace responseOkPadding with xPaddingBytes (#3643)

This commit is contained in:
mmmray 2024-08-10 23:47:42 +02:00 committed by GitHub
parent f650d87083
commit a3b306aaa4
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GPG Key ID: B5690EEEBB952194
8 changed files with 119 additions and 106 deletions
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4
infra/conf/transport_internet.go
View File

@ -233,7 +233,7 @@ type SplitHTTPConfig struct {
ScMaxEachPostBytes *Int32Range `json:"scMaxEachPostBytes"`
ScMinPostsIntervalMs *Int32Range `json:"scMinPostsIntervalMs"`
NoSSEHeader bool `json:"noSSEHeader"`
ResponseOkPadding *Int32Range `json:"responseOkPadding"`
XPaddingBytes *Int32Range `json:"xPaddingBytes"`
}
func splithttpNewRandRangeConfig(input *Int32Range) *splithttp.RandRangeConfig {
@ -265,7 +265,7 @@ func (c *SplitHTTPConfig) Build() (proto.Message, error) {
ScMaxEachPostBytes: splithttpNewRandRangeConfig(c.ScMaxEachPostBytes),
ScMinPostsIntervalMs: splithttpNewRandRangeConfig(c.ScMinPostsIntervalMs),
NoSSEHeader: c.NoSSEHeader,
ResponseOkPadding: splithttpNewRandRangeConfig(c.ResponseOkPadding),
XPaddingBytes: splithttpNewRandRangeConfig(c.XPaddingBytes),
}
return config, nil
}

43
transport/internet/splithttp/config.go
View File

@ -10,22 +10,39 @@ import (
"github.com/xtls/xray-core/transport/internet"
)
func (c *Config) GetNormalizedPath(addPath string, addQuery bool) string {
func (c *Config) GetNormalizedPath() string {
pathAndQuery := strings.SplitN(c.Path, "?", 2)
path := pathAndQuery[0]
query := ""
if len(pathAndQuery) > 1 && addQuery {
query = "?" + pathAndQuery[1]
}
if path == "" || path[0] != '/' {
path = "/" + path
}
if path[len(path)-1] != '/' {
path = path + "/"
}
return path + addPath + query
return path
}
func (c *Config) GetNormalizedQuery() string {
pathAndQuery := strings.SplitN(c.Path, "?", 2)
query := ""
if len(pathAndQuery) > 1 {
query = pathAndQuery[1]
}
if query != "" {
query += "&"
}
paddingLen := c.GetNormalizedXPaddingBytes().roll()
if paddingLen > 0 {
query += "x_padding=" + strings.Repeat("0", int(paddingLen))
}
return query
}
func (c *Config) GetRequestHeader() http.Header {
@ -33,9 +50,17 @@ func (c *Config) GetRequestHeader() http.Header {
for k, v := range c.Header {
header.Add(k, v)
}
return header
}
func (c *Config) WriteResponseHeader(writer http.ResponseWriter) {
paddingLen := c.GetNormalizedXPaddingBytes().roll()
if paddingLen > 0 {
writer.Header().Set("X-Padding", strings.Repeat("0", int(paddingLen)))
}
}
func (c *Config) GetNormalizedScMaxConcurrentPosts() RandRangeConfig {
if c.ScMaxConcurrentPosts == nil || c.ScMaxConcurrentPosts.To == 0 {
return RandRangeConfig{
@ -69,15 +94,15 @@ func (c *Config) GetNormalizedScMinPostsIntervalMs() RandRangeConfig {
return *c.ScMinPostsIntervalMs
}
func (c *Config) GetNormalizedResponseOkPadding() RandRangeConfig {
if c.ResponseOkPadding == nil || c.ResponseOkPadding.To == 0 {
func (c *Config) GetNormalizedXPaddingBytes() RandRangeConfig {
if c.XPaddingBytes == nil || c.XPaddingBytes.To == 0 {
return RandRangeConfig{
From: 100,
To: 1000,
}
}
return *c.ResponseOkPadding
return *c.XPaddingBytes
}
func init() {

56
transport/internet/splithttp/config.pb.go
View File

@ -32,7 +32,7 @@ type Config struct {
ScMaxEachPostBytes *RandRangeConfig `protobuf:"bytes,5,opt,name=scMaxEachPostBytes,proto3" json:"scMaxEachPostBytes,omitempty"`
ScMinPostsIntervalMs *RandRangeConfig `protobuf:"bytes,6,opt,name=scMinPostsIntervalMs,proto3" json:"scMinPostsIntervalMs,omitempty"`
NoSSEHeader bool `protobuf:"varint,7,opt,name=noSSEHeader,proto3" json:"noSSEHeader,omitempty"`
ResponseOkPadding *RandRangeConfig `protobuf:"bytes,8,opt,name=responseOkPadding,proto3" json:"responseOkPadding,omitempty"`
XPaddingBytes *RandRangeConfig `protobuf:"bytes,8,opt,name=xPaddingBytes,proto3" json:"xPaddingBytes,omitempty"`
}
func (x *Config) Reset() {
@ -116,9 +116,9 @@ func (x *Config) GetNoSSEHeader() bool {
return false
}
func (x *Config) GetResponseOkPadding() *RandRangeConfig {
func (x *Config) GetXPaddingBytes() *RandRangeConfig {
if x != nil {
return x.ResponseOkPadding
return x.XPaddingBytes
}
return nil
}
@ -185,7 +185,7 @@ var file_transport_internet_splithttp_config_proto_rawDesc = []byte{
0x72, 0x6e, 0x65, 0x74, 0x2f, 0x73, 0x70, 0x6c, 0x69, 0x74, 0x68, 0x74, 0x74, 0x70, 0x2f, 0x63,
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@ -215,29 +215,29 @@ var file_transport_internet_splithttp_config_proto_rawDesc = []byte{
0x73, 0x63, 0x4d, 0x69, 0x6e, 0x50, 0x6f, 0x73, 0x74, 0x73, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x76,
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0x6f, 0x74, 0x6f, 0x33,
}
var (
@ -263,7 +263,7 @@ var file_transport_internet_splithttp_config_proto_depIdxs = []int32{
1, // 1: xray.transport.internet.splithttp.Config.scMaxConcurrentPosts:type_name -> xray.transport.internet.splithttp.RandRangeConfig
1, // 2: xray.transport.internet.splithttp.Config.scMaxEachPostBytes:type_name -> xray.transport.internet.splithttp.RandRangeConfig
1, // 3: xray.transport.internet.splithttp.Config.scMinPostsIntervalMs:type_name -> xray.transport.internet.splithttp.RandRangeConfig
1, // 4: xray.transport.internet.splithttp.Config.responseOkPadding:type_name -> xray.transport.internet.splithttp.RandRangeConfig
1, // 4: xray.transport.internet.splithttp.Config.xPaddingBytes:type_name -> xray.transport.internet.splithttp.RandRangeConfig
5, // [5:5] is the sub-list for method output_type
5, // [5:5] is the sub-list for method input_type
5, // [5:5] is the sub-list for extension type_name

2
transport/internet/splithttp/config.proto
View File

@ -14,7 +14,7 @@ message Config {
RandRangeConfig scMaxEachPostBytes = 5;
RandRangeConfig scMinPostsIntervalMs = 6;
bool noSSEHeader = 7;
RandRangeConfig responseOkPadding = 8;
RandRangeConfig xPaddingBytes = 8;
}
message RandRangeConfig {

37
transport/internet/splithttp/config_test.go
View File

@ -11,41 +11,8 @@ func Test_GetNormalizedPath(t *testing.T) {
Path: "/?world",
}
path := c.GetNormalizedPath("hello", true)
if path != "/hello?world" {
t.Error("Unexpected: ", path)
}
}
func Test_GetNormalizedPath2(t *testing.T) {
c := Config{
Path: "?world",
}
path := c.GetNormalizedPath("hello", true)
if path != "/hello?world" {
t.Error("Unexpected: ", path)
}
}
func Test_GetNormalizedPath3(t *testing.T) {
c := Config{
Path: "hello?world",
}
path := c.GetNormalizedPath("", true)
if path != "/hello/?world" {
t.Error("Unexpected: ", path)
}
}
func Test_GetNormalizedPath4(t *testing.T) {
c := Config{
Path: "hello?world",
}
path := c.GetNormalizedPath("", false)
if path != "/hello/" {
path := c.GetNormalizedPath()
if path != "/" {
t.Error("Unexpected: ", path)
}
}

50
transport/internet/splithttp/dialer.go
View File

@ -1,6 +1,7 @@
package splithttp
import (
"bytes"
"context"
gotls "crypto/tls"
"io"
@ -217,8 +218,8 @@ func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.Me
}
sessionIdUuid := uuid.New()
requestURL.Path = transportConfiguration.GetNormalizedPath(sessionIdUuid.String(), true)
baseURL := requestURL.String()
requestURL.Path = transportConfiguration.GetNormalizedPath() + sessionIdUuid.String()
requestURL.RawQuery = transportConfiguration.GetNormalizedQuery()
httpClient := getHTTPClient(ctx, dest, streamSettings)
@ -247,9 +248,16 @@ func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.Me
go func() {
defer requestsLimiter.Signal()
// this intentionally makes a shallow-copy of the struct so we
// can reassign Path (potentially concurrently)
url := requestURL
url.Path += "/" + strconv.FormatInt(seq, 10)
// reassign query to get different padding
url.RawQuery = transportConfiguration.GetNormalizedQuery()
err := httpClient.SendUploadRequest(
context.WithoutCancel(ctx),
baseURL+"/"+strconv.FormatInt(seq, 10),
url.String(),
&buf.MultiBufferContainer{MultiBuffer: chunk},
int64(chunk.Len()),
)
@ -271,26 +279,38 @@ func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.Me
}
}()
lazyRawDownload, remoteAddr, localAddr, err := httpClient.OpenDownload(context.WithoutCancel(ctx), baseURL)
lazyRawDownload, remoteAddr, localAddr, err := httpClient.OpenDownload(context.WithoutCancel(ctx), requestURL.String())
if err != nil {
return nil, err
}
lazyDownload := &LazyReader{
CreateReader: func() (io.ReadCloser, error) {
// skip "ooooooooook" response
trashHeader := []byte{0}
for {
_, err := io.ReadFull(lazyRawDownload, trashHeader)
if err != nil {
return nil, errors.New("failed to read initial response").Base(err)
}
if trashHeader[0] == 'k' {
break
}
// skip "ok" response
trashHeader := []byte{0, 0}
_, err := io.ReadFull(lazyRawDownload, trashHeader)
if err != nil {
return nil, errors.New("failed to read initial response").Base(err)
}
return lazyRawDownload, nil
if bytes.Equal(trashHeader, []byte("ok")) {
return lazyRawDownload, nil
}
// we read some garbage byte that may not have been "ok" at
// all. return a reader that replays what we have read so far
reader := io.MultiReader(
bytes.NewReader(trashHeader),
lazyRawDownload,
)
readCloser := struct {
io.Reader
io.Closer
}{
Reader: reader,
Closer: lazyRawDownload,
}
return readCloser, nil
},
}

18
transport/internet/splithttp/hub.go
View File

@ -124,7 +124,6 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
currentSession := h.upsertSession(sessionId)
scMaxEachPostBytes := int(h.ln.config.GetNormalizedScMaxEachPostBytes().To)
responseOkPadding := h.ln.config.GetNormalizedResponseOkPadding()
if request.Method == "POST" {
seq := ""
@ -170,6 +169,7 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
return
}
h.config.WriteResponseHeader(writer)
writer.WriteHeader(http.StatusOK)
} else if request.Method == "GET" {
responseFlusher, ok := writer.(http.Flusher)
@ -189,14 +189,14 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
writer.Header().Set("Content-Type", "text/event-stream")
}
h.config.WriteResponseHeader(writer)
writer.WriteHeader(http.StatusOK)
// send a chunk immediately to enable CDN streaming.
// many CDN buffer the response headers until the origin starts sending
// the body, with no way to turn it off.
padding := int(responseOkPadding.roll())
for i := 0; i < padding; i++ {
writer.Write([]byte("o"))
}
// in earlier versions, this initial body data was used to immediately
// start a 200 OK on all CDN. but xray client since 1.8.16 does not
// actually require an immediate 200 OK, but now requires these
// additional bytes "ok". xray client 1.8.24+ doesn't require "ok"
// anymore, and so this line should be removed in later versions.
writer.Write([]byte("ok"))
responseFlusher.Flush()
@ -277,7 +277,7 @@ func ListenSH(ctx context.Context, address net.Address, port net.Port, streamSet
handler := &requestHandler{
config: shSettings,
host: shSettings.Host,
path: shSettings.GetNormalizedPath("", false),
path: shSettings.GetNormalizedPath(),
ln: l,
sessionMu: &sync.Mutex{},
sessions: sync.Map{},

15
transport/internet/splithttp/splithttp_test.go
View File

@ -5,6 +5,7 @@ import (
"crypto/rand"
gotls "crypto/tls"
"fmt"
"io"
gonet "net"
"net/http"
"runtime"
@ -60,7 +61,7 @@ func Test_listenSHAndDial(t *testing.T) {
var b [1024]byte
fmt.Println("test2")
n, _ := conn.Read(b[:])
n, _ := io.ReadFull(conn, b[:])
fmt.Println("string is", n)
if string(b[:n]) != "Response" {
t.Error("response: ", string(b[:n]))
@ -72,7 +73,7 @@ func Test_listenSHAndDial(t *testing.T) {
common.Must(err)
_, err = conn.Write([]byte("Test connection 2"))
common.Must(err)
n, _ = conn.Read(b[:])
n, _ = io.ReadFull(conn, b[:])
common.Must(err)
if string(b[:n]) != "Response" {
t.Error("response: ", string(b[:n]))
@ -116,7 +117,7 @@ func TestDialWithRemoteAddr(t *testing.T) {
common.Must(err)
var b [1024]byte
n, _ := conn.Read(b[:])
n, _ := io.ReadFull(conn, b[:])
if string(b[:n]) != "1.1.1.1:0" {
t.Error("response: ", string(b[:n]))
}
@ -168,7 +169,7 @@ func Test_listenSHAndDial_TLS(t *testing.T) {
common.Must(err)
var b [1024]byte
n, _ := conn.Read(b[:])
n, _ := io.ReadFull(conn, b[:])
if string(b[:n]) != "Response" {
t.Error("response: ", string(b[:n]))
}
@ -339,7 +340,7 @@ func Test_listenSHAndDial_Unix(t *testing.T) {
var b [1024]byte
fmt.Println("test2")
n, _ := conn.Read(b[:])
n, _ := io.ReadFull(conn, b[:])
fmt.Println("string is", n)
if string(b[:n]) != "Response" {
t.Error("response: ", string(b[:n]))
@ -351,7 +352,7 @@ func Test_listenSHAndDial_Unix(t *testing.T) {
common.Must(err)
_, err = conn.Write([]byte("Test connection 2"))
common.Must(err)
n, _ = conn.Read(b[:])
n, _ = io.ReadFull(conn, b[:])
common.Must(err)
if string(b[:n]) != "Response" {
t.Error("response: ", string(b[:n]))
@ -397,7 +398,7 @@ func Test_queryString(t *testing.T) {
var b [1024]byte
fmt.Println("test2")
n, _ := conn.Read(b[:])
n, _ := io.ReadFull(conn, b[:])
fmt.Println("string is", n)
if string(b[:n]) != "Response" {
t.Error("response: ", string(b[:n]))