/
http1.go
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/
http1.go
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// Licensed to Apache Software Foundation (ASF) under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Apache Software Foundation (ASF) licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
package protocols
import (
"container/list"
"io"
"github.com/apache/skywalking-rover/pkg/accesslog/common"
"github.com/apache/skywalking-rover/pkg/accesslog/events"
"github.com/apache/skywalking-rover/pkg/accesslog/forwarder"
"github.com/apache/skywalking-rover/pkg/logger"
"github.com/apache/skywalking-rover/pkg/profiling/task/network/analyze/layer7/protocols/http1/reader"
"github.com/apache/skywalking-rover/pkg/tools/buffer"
"github.com/apache/skywalking-rover/pkg/tools/enums"
v3 "skywalking.apache.org/repo/goapi/collect/ebpf/accesslog/v3"
)
var http1Log = logger.GetLogger("accesslog", "collector", "protocols", "http1")
func init() {
registeredProtocols[enums.ConnectionProtocolHTTP] = func(ctx *common.AccessLogContext) Protocol {
return &HTTP1Protocol{ctx: ctx}
}
}
type HTTP1Protocol struct {
ctx *common.AccessLogContext
}
type HTTP1Metrics struct {
connectionID uint64
randomID uint64
halfRequests *list.List
}
func (p *HTTP1Protocol) GenerateConnection(connectionID, randomID uint64) ProtocolMetrics {
return &HTTP1Metrics{
connectionID: connectionID,
randomID: randomID,
halfRequests: list.New(),
}
}
func (p *HTTP1Protocol) Analyze(metrics ProtocolMetrics, buf *buffer.Buffer, _ *AnalyzeHelper) error {
http1Metrics := metrics.(*HTTP1Metrics)
http1Log.Debugf("ready to analyze HTTP/1 protocol data, connection ID: %d, random ID: %d, data len: %d",
http1Metrics.connectionID, http1Metrics.randomID, buf.DataLength())
buf.ResetForLoopReading()
for {
if !buf.PrepareForReading() {
return nil
}
messageType, err := reader.IdentityMessageType(buf)
if err != nil {
http1Log.Debugf("failed to identity message type, %v", err)
if buf.SkipCurrentElement() {
break
}
continue
}
var result enums.ParseResult
switch messageType {
case reader.MessageTypeRequest:
result, _ = p.handleRequest(metrics, buf)
case reader.MessageTypeResponse:
result, _ = p.handleResponse(metrics, buf)
case reader.MessageTypeUnknown:
result = enums.ParseResultSkipPackage
}
finishReading := false
switch result {
case enums.ParseResultSuccess:
finishReading = buf.RemoveReadElements()
case enums.ParseResultSkipPackage:
finishReading = buf.SkipCurrentElement()
}
if finishReading {
break
}
}
return nil
}
func (p *HTTP1Protocol) handleRequest(metrics ProtocolMetrics, buf *buffer.Buffer) (enums.ParseResult, error) {
req, result, err := reader.ReadRequest(buf, true)
if err != nil {
return enums.ParseResultSkipPackage, err
}
if result != enums.ParseResultSuccess {
return result, nil
}
metrics.(*HTTP1Metrics).appendRequestToList(req)
return result, nil
}
func (p *HTTP1Protocol) handleResponse(metrics ProtocolMetrics, b *buffer.Buffer) (enums.ParseResult, error) {
http1Metrics := metrics.(*HTTP1Metrics)
firstRequest := http1Metrics.halfRequests.Front()
if firstRequest == nil {
return enums.ParseResultSkipPackage, nil
}
request := http1Metrics.halfRequests.Remove(firstRequest).(*reader.Request)
// parsing response
response, result, err := reader.ReadResponse(request, b, true)
defer func() {
// if parsing response failed, then put the request back to the list
if result != enums.ParseResultSuccess {
http1Metrics.halfRequests.PushFront(request)
}
}()
if err != nil {
return enums.ParseResultSkipPackage, err
} else if result != enums.ParseResultSuccess {
return result, nil
}
// getting the request and response, then send to the forwarder
p.handleHTTPData(http1Metrics, request, response)
return enums.ParseResultSuccess, nil
}
func (p *HTTP1Protocol) handleHTTPData(metrics *HTTP1Metrics, request *reader.Request, response *reader.Response) {
detailEvents := make([]*events.SocketDetailEvent, 0)
detailEvents = appendSocketDetailsFromBuffer(detailEvents, request.HeaderBuffer())
detailEvents = appendSocketDetailsFromBuffer(detailEvents, request.BodyBuffer())
detailEvents = appendSocketDetailsFromBuffer(detailEvents, response.HeaderBuffer())
detailEvents = appendSocketDetailsFromBuffer(detailEvents, response.BodyBuffer())
if len(detailEvents) == 0 {
http1Log.Warnf("cannot found any detail events for HTTP/1.x protocol, data id: %d-%d",
request.MinDataID(), response.BodyBuffer().LastSocketBuffer().DataID())
return
}
http1Log.Debugf("found fully HTTP1 request and response, contains %d detail events , connection ID: %d, random ID: %d",
len(detailEvents), metrics.connectionID, metrics.randomID)
originalRequest := request.Original()
originalResponse := response.Original()
defer func() {
p.closeStream(originalRequest.Body)
p.closeStream(originalResponse.Body)
}()
forwarder.SendTransferProtocolEvent(p.ctx, detailEvents, &v3.AccessLogProtocolLogs{
Protocol: &v3.AccessLogProtocolLogs_Http{
Http: &v3.AccessLogHTTPProtocol{
StartTime: forwarder.BuildOffsetTimestamp(detailEvents[0].StartTime),
EndTime: forwarder.BuildOffsetTimestamp(detailEvents[len(detailEvents)-1].EndTime),
Version: v3.AccessLogHTTPProtocolVersion_HTTP1,
Request: &v3.AccessLogHTTPProtocolRequest{
Method: transformHTTPMethod(originalRequest.Method),
Path: originalRequest.URL.Path,
SizeOfHeadersBytes: uint64(request.HeaderBuffer().DataSize()),
SizeOfBodyBytes: uint64(request.BodyBuffer().DataSize()),
Trace: analyzeTraceInfo(func(key string) string {
return originalRequest.Header.Get(key)
}, http1Log),
},
Response: &v3.AccessLogHTTPProtocolResponse{
StatusCode: int32(originalResponse.StatusCode),
SizeOfHeadersBytes: uint64(response.HeaderBuffer().DataSize()),
SizeOfBodyBytes: uint64(response.BodyBuffer().DataSize()),
},
},
},
})
}
func (p *HTTP1Protocol) closeStream(ioReader io.Closer) {
if ioReader != nil {
_ = ioReader.Close()
}
}
func transformHTTPMethod(method string) v3.AccessLogHTTPProtocolRequestMethod {
switch method {
case "GET":
return v3.AccessLogHTTPProtocolRequestMethod_Get
case "POST":
return v3.AccessLogHTTPProtocolRequestMethod_Post
case "PUT":
return v3.AccessLogHTTPProtocolRequestMethod_Put
case "DELETE":
return v3.AccessLogHTTPProtocolRequestMethod_Delete
case "HEAD":
return v3.AccessLogHTTPProtocolRequestMethod_Head
case "OPTIONS":
return v3.AccessLogHTTPProtocolRequestMethod_Options
case "TRACE":
return v3.AccessLogHTTPProtocolRequestMethod_Trace
case "CONNECT":
return v3.AccessLogHTTPProtocolRequestMethod_Connect
case "PATCH":
return v3.AccessLogHTTPProtocolRequestMethod_Patch
}
http1Log.Warnf("unknown http method: %s", method)
return v3.AccessLogHTTPProtocolRequestMethod_Get
}
func (m *HTTP1Metrics) appendRequestToList(req *reader.Request) {
if m.halfRequests.Len() == 0 {
m.halfRequests.PushFront(req)
return
}
if m.halfRequests.Back().Value.(*reader.Request).MinDataID() < req.MinDataID() {
m.halfRequests.PushBack(req)
return
}
beenAdded := false
for element := m.halfRequests.Front(); element != nil; element = element.Next() {
existEvent := element.Value.(*reader.Request)
if existEvent.MinDataID() > req.MinDataID() {
m.halfRequests.InsertBefore(req, element)
beenAdded = true
break
}
}
if !beenAdded {
m.halfRequests.PushBack(req)
}
}