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134 lines
4.1 KiB
Go
134 lines
4.1 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package http2
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import (
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"errors"
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"fmt"
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)
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// An ErrCode is an unsigned 32-bit error code as defined in the HTTP/2 spec.
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type ErrCode uint32
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const (
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ErrCodeNo ErrCode = 0x0
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ErrCodeProtocol ErrCode = 0x1
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ErrCodeInternal ErrCode = 0x2
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ErrCodeFlowControl ErrCode = 0x3
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ErrCodeSettingsTimeout ErrCode = 0x4
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ErrCodeStreamClosed ErrCode = 0x5
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ErrCodeFrameSize ErrCode = 0x6
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ErrCodeRefusedStream ErrCode = 0x7
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ErrCodeCancel ErrCode = 0x8
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ErrCodeCompression ErrCode = 0x9
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ErrCodeConnect ErrCode = 0xa
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ErrCodeEnhanceYourCalm ErrCode = 0xb
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ErrCodeInadequateSecurity ErrCode = 0xc
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ErrCodeHTTP11Required ErrCode = 0xd
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)
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var errCodeName = map[ErrCode]string{
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ErrCodeNo: "NO_ERROR",
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ErrCodeProtocol: "PROTOCOL_ERROR",
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ErrCodeInternal: "INTERNAL_ERROR",
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ErrCodeFlowControl: "FLOW_CONTROL_ERROR",
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ErrCodeSettingsTimeout: "SETTINGS_TIMEOUT",
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ErrCodeStreamClosed: "STREAM_CLOSED",
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ErrCodeFrameSize: "FRAME_SIZE_ERROR",
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ErrCodeRefusedStream: "REFUSED_STREAM",
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ErrCodeCancel: "CANCEL",
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ErrCodeCompression: "COMPRESSION_ERROR",
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ErrCodeConnect: "CONNECT_ERROR",
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ErrCodeEnhanceYourCalm: "ENHANCE_YOUR_CALM",
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ErrCodeInadequateSecurity: "INADEQUATE_SECURITY",
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ErrCodeHTTP11Required: "HTTP_1_1_REQUIRED",
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}
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func (e ErrCode) String() string {
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if s, ok := errCodeName[e]; ok {
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return s
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}
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return fmt.Sprintf("unknown error code 0x%x", uint32(e))
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}
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// ConnectionError is an error that results in the termination of the
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// entire connection.
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type ConnectionError ErrCode
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func (e ConnectionError) Error() string { return fmt.Sprintf("connection error: %s", ErrCode(e)) }
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// StreamError is an error that only affects one stream within an
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// HTTP/2 connection.
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type StreamError struct {
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StreamID uint32
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Code ErrCode
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Cause error // optional additional detail
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}
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func streamError(id uint32, code ErrCode) StreamError {
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return StreamError{StreamID: id, Code: code}
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}
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func (e StreamError) Error() string {
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if e.Cause != nil {
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return fmt.Sprintf("stream error: stream ID %d; %v; %v", e.StreamID, e.Code, e.Cause)
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}
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return fmt.Sprintf("stream error: stream ID %d; %v", e.StreamID, e.Code)
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}
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// 6.9.1 The Flow Control Window
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// "If a sender receives a WINDOW_UPDATE that causes a flow control
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// window to exceed this maximum it MUST terminate either the stream
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// or the connection, as appropriate. For streams, [...]; for the
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// connection, a GOAWAY frame with a FLOW_CONTROL_ERROR code."
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type goAwayFlowError struct{}
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func (goAwayFlowError) Error() string { return "connection exceeded flow control window size" }
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// connError represents an HTTP/2 ConnectionError error code, along
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// with a string (for debugging) explaining why.
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//
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// Errors of this type are only returned by the frame parser functions
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// and converted into ConnectionError(Code), after stashing away
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// the Reason into the Framer's errDetail field, accessible via
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// the (*Framer).ErrorDetail method.
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type connError struct {
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Code ErrCode // the ConnectionError error code
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Reason string // additional reason
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}
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func (e connError) Error() string {
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return fmt.Sprintf("http2: connection error: %v: %v", e.Code, e.Reason)
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}
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type pseudoHeaderError string
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func (e pseudoHeaderError) Error() string {
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return fmt.Sprintf("invalid pseudo-header %q", string(e))
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}
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type duplicatePseudoHeaderError string
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func (e duplicatePseudoHeaderError) Error() string {
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return fmt.Sprintf("duplicate pseudo-header %q", string(e))
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}
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type headerFieldNameError string
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func (e headerFieldNameError) Error() string {
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return fmt.Sprintf("invalid header field name %q", string(e))
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}
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type headerFieldValueError string
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func (e headerFieldValueError) Error() string {
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return fmt.Sprintf("invalid header field value %q", string(e))
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}
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var (
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errMixPseudoHeaderTypes = errors.New("mix of request and response pseudo headers")
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errPseudoAfterRegular = errors.New("pseudo header field after regular")
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)
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