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SplitHTTP: Remove ok compatibility logic (#3753)

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Remove some code that was added to maintain compatibility with older
Xray versions. This breaks compatibility with Xray-core v1.8.23 or older.
This commit is contained in:
mmmray 2024-09-03 04:25:15 +02:00 committed by GitHub
parent f1c439c2aa
commit ab3c00e96b
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GPG key ID: B5690EEEBB952194
3 changed files with 1 additions and 59 deletions
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4
transport/internet/splithttp/dialer.go
View file

@ -285,13 +285,11 @@ func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.Me
}
}()
lazyRawDownload, remoteAddr, localAddr, err := httpClient.OpenDownload(context.WithoutCancel(ctx), requestURL.String())
reader, remoteAddr, localAddr, err := httpClient.OpenDownload(context.WithoutCancel(ctx), requestURL.String())
if err != nil {
return nil, err
}
reader := &stripOkReader{ReadCloser: lazyRawDownload}
writer := uploadWriter{
uploadPipeWriter,
maxUploadSize,

8
transport/internet/splithttp/hub.go
View file

@ -196,14 +196,6 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
h.config.WriteResponseHeader(writer)
writer.WriteHeader(http.StatusOK)
if _, ok := request.URL.Query()["x_padding"]; !ok {
// 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()

48
transport/internet/splithttp/strip_ok_reader.go
View file

@ -1,48 +0,0 @@
package splithttp
import (
"bytes"
"io"
"github.com/xtls/xray-core/common/errors"
)
// in older versions of splithttp, the server would respond with `ok` to flush
// out HTTP response headers early. Response headers and a 200 OK were required
// to initiate the connection. Later versions of splithttp dropped this
// requirement, and in xray 1.8.24 the server stopped sending "ok" if it sees
// x_padding. For compatibility, we need to remove "ok" from the underlying
// reader if it exists, and otherwise forward the stream as-is.
type stripOkReader struct {
io.ReadCloser
firstDone bool
prefixRead []byte
}
func (r *stripOkReader) Read(b []byte) (int, error) {
if !r.firstDone {
r.firstDone = true
// skip "ok" response
prefixRead := []byte{0, 0}
_, err := io.ReadFull(r.ReadCloser, prefixRead)
if err != nil {
return 0, errors.New("failed to read initial response").Base(err)
}
if !bytes.Equal(prefixRead, []byte("ok")) {
// we read some garbage byte that may not have been "ok" at
// all. return a reader that replays what we have read so far
r.prefixRead = prefixRead
}
}
if len(r.prefixRead) > 0 {
n := copy(b, r.prefixRead)
r.prefixRead = r.prefixRead[n:]
return n, nil
}
n, err := r.ReadCloser.Read(b)
return n, err
}