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forked from abourget/goproxy
/
harlog.go
134 lines (113 loc) · 3.32 KB
/
harlog.go
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package goproxy
import (
"bytes"
"encoding/json"
"io"
"io/ioutil"
"net/http"
"os"
"time"
"github.com/stoplightio/goproxy/har"
)
func (proxy *ProxyHttpServer) harLogAggregator() {
proxy.Logf("Launching harLogAggregator()")
for {
select {
case reqAndResp := <-proxy.harLogEntryCh:
harEntry := new(har.Entry)
harEntry.Request = har.ParseRequest(reqAndResp.req, reqAndResp.captureContent)
harEntry.StartedDateTime = reqAndResp.start
harEntry.Response = har.ParseResponse(reqAndResp.resp, reqAndResp.captureContent)
harEntry.Time = reqAndResp.end.Sub(reqAndResp.start).Nanoseconds() / 1e6
harEntry.FillIPAddress(reqAndResp.req) // should take it from the actual conn?
if len(proxy.harLog.Log.Entries) == 0 {
proxy.harLog.AppendPage(har.Page{
ID: "0",
StartedDateTime: harEntry.StartedDateTime,
Title: "GoProxy Log",
})
}
harEntry.PageRef = "0"
proxy.harLog.AppendEntry(*harEntry)
case filename := <-proxy.harFlushRequest:
proxy.Logf("Received HAR flush request to %q", filename)
if len(proxy.harLog.Log.Entries) == 0 {
proxy.Logf("No HAR entries to flush")
continue
}
err := flushHarToDisk(proxy.harLog, filename)
if err != nil {
proxy.Logf("Error flushing HAR file to disk: %s", err)
} else {
proxy.Logf("Wrote HAR file to disk: %s", filename)
}
proxy.harLog = har.New() // reset
}
}
}
func flushHarToDisk(har *har.Har, filename string) error {
file, err := os.Create(filename)
if err != nil {
return err
}
defer file.Close()
jsonHar, err := json.MarshalIndent(har, "", " ")
if err != nil {
return err
}
_, err = file.Write(jsonHar)
if err != nil {
return err
}
return nil
}
type harReqAndResp struct {
req *http.Request
start time.Time
resp *http.Response
end time.Time
captureContent bool
}
func copyReq(req *http.Request) (*http.Request, *http.Request) {
reqCopy := new(http.Request)
*reqCopy = *req
req.Body, reqCopy.Body = copyReadCloser(req.Body, req.ContentLength)
return req, reqCopy
}
func copyResp(resp *http.Response) (*http.Response, *http.Response) {
respCopy := new(http.Response)
*respCopy = *resp
resp.Body, respCopy.Body = copyReadCloser(resp.Body, resp.ContentLength)
return resp, respCopy
}
func copyReadCloser(readCloser io.ReadCloser, len int64) (io.ReadCloser, io.ReadCloser) {
if len < 0 {
len = 0
}
temp := bytes.NewBuffer(make([]byte, 0, len))
teeReader := io.TeeReader(readCloser, temp)
copy := bytes.NewBuffer(make([]byte, 0, len))
copy.ReadFrom(teeReader)
return ioutil.NopCloser(temp), ioutil.NopCloser(copy)
}
// LogToHARFile collects all the content from the Request/Response
// roundtrip and stores it in memory until you call
// `FlushHARToDisk(filename)`.. at which point it will all be flushed
// to disk in HAR file format.
//
// LogToHARFile alwasy returns `NEXT`.
func (ctx *ProxyCtx) LogToHARFile(captureContent bool) Next {
ctx.proxy.harFlusherRunOnce.Do(func() {
go ctx.proxy.harLogAggregator()
})
ctx.isLogEnabled = true
ctx.isLogWithContent = captureContent
return NEXT
}
func (ctx *ProxyCtx) FlushHARToDisk(filename string) {
ctx.proxy.FlushHARToDisk(filename)
}
func (proxy *ProxyHttpServer) FlushHARToDisk(filename string) {
proxy.Logf("Calling a flush of HAR to disk")
proxy.harFlushRequest <- filename
}