forked from quic-go/quic-go
116 lines
2.8 KiB
Go
116 lines
2.8 KiB
Go
package http3
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import (
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"context"
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"io"
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"github.com/quic-go/quic-go"
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)
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// The HTTPStreamer allows taking over a HTTP/3 stream. The interface is implemented by:
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// * for the server: the http.Request.Body
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// * for the client: the http.Response.Body
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// On the client side, the stream will be closed for writing, unless the DontCloseRequestStream RoundTripOpt was set.
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// When a stream is taken over, it's the caller's responsibility to close the stream.
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type HTTPStreamer interface {
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HTTPStream() Stream
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}
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// A Hijacker allows hijacking of the stream creating part of a quic.Session from a http.Response.Body.
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// It is used by WebTransport to create WebTransport streams after a session has been established.
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type Hijacker interface {
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Connection() Connection
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}
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// The body is used in the requestBody (for a http.Request) and the responseBody (for a http.Response).
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type body struct {
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str quic.Stream
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wasHijacked bool // set when HTTPStream is called
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}
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func (r *body) HTTPStream() Stream {
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r.wasHijacked = true
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return r.str
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}
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func (r *body) StreamID() quic.StreamID { return r.str.StreamID() }
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func (r *body) wasStreamHijacked() bool {
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return r.wasHijacked
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}
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func (r *body) Read(b []byte) (int, error) {
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n, err := r.str.Read(b)
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return n, maybeReplaceError(err)
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}
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func (r *body) Close() error {
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r.str.CancelRead(quic.StreamErrorCode(ErrCodeRequestCanceled))
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return nil
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}
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type requestBody struct {
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body
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connCtx context.Context
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rcvdSettings <-chan struct{}
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getSettings func() *Settings
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}
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var (
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_ io.ReadCloser = &requestBody{}
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_ HTTPStreamer = &requestBody{}
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)
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func newRequestBody(str Stream, connCtx context.Context, rcvdSettings <-chan struct{}, getSettings func() *Settings) *requestBody {
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return &requestBody{
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body: body{str: str},
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connCtx: connCtx,
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rcvdSettings: rcvdSettings,
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getSettings: getSettings,
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}
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}
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type hijackableBody struct {
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body body
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// only set for the http.Response
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// The channel is closed when the user is done with this response:
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// either when Read() errors, or when Close() is called.
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reqDone chan<- struct{}
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reqDoneClosed bool
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}
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var _ io.ReadCloser = &hijackableBody{}
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func newResponseBody(str Stream, done chan<- struct{}) *hijackableBody {
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return &hijackableBody{
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body: body{str: str},
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reqDone: done,
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}
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}
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func (r *hijackableBody) Read(b []byte) (int, error) {
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n, err := r.body.str.Read(b)
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if err != nil {
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r.requestDone()
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}
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return n, maybeReplaceError(err)
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}
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func (r *hijackableBody) requestDone() {
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if r.reqDoneClosed || r.reqDone == nil {
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return
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}
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if r.reqDone != nil {
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close(r.reqDone)
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}
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r.reqDoneClosed = true
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}
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func (r *hijackableBody) Close() error {
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r.requestDone()
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// If the EOF was read, CancelRead() is a no-op.
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r.body.str.CancelRead(quic.StreamErrorCode(ErrCodeRequestCanceled))
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return nil
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}
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