func (d *delayWriter) Write(p []byte) (n int, err error) {
if d.first {
d.first = false
d.Flush()
}
switch d.delay.Act {
case profile.DelayActDelayEach:
if !d.hasDelayed {
d.hasDelayed = true
<-time.NewTimer(d.d).C
}
case profile.DelayActTimeout:
once := len(p) / 1024
sum := 0
if once < 1 {
once = 1
} else if once > 10*1024 {
once = 10 * 1024
}
i := 0
for {
duration := time.Now().Sub(d.start)
if duration >= d.d {
gonet.ResetResponse(d.w)
return sum, fmt.Errorf("http body timeout in %v(set %v)", duration, d.d)
}
c := len(p) - i
if c == 0 {
break
} else if c > once {
c = once
}
oc, err := d.w.Write(p[i : i+c])
sum += oc
i = sum
if err != nil {
return sum, err
}
}
return sum, nil
}
return d.w.Write(p)
}
func (p *Proxy) remoteProxyUrl(remoteIP, target string, w http.ResponseWriter, r *http.Request) {
needCache := false
fullUrl := target
if len(r.URL.RawQuery) > 0 {
fullUrl += "?" + r.URL.RawQuery
}
requestUrl := fullUrl
requestR := r
contentSource := ""
var prof *profile.Profile
if !p.isSelfAddr(remoteIP) {
prof = p.profileOp.Open(remoteIP)
}
rangeInfo := cache.CheckRange(r)
f := p.lives.Open(remoteIP)
var u *life.UrlState
if f != nil {
u = f.OpenUrl(fullUrl)
}
var writeWrap io.Writer = nil
if p.urlOp != nil {
delay := p.urlOp.Delay(remoteIP, fullUrl)
//fmt.Println("url delay: " + delay.String())
switch delay.Act {
case profile.DelayActDelayEach:
if delay.Time > 0 {
// TODO: create request before sleep, more effective
d := delay.RandDuration(p.r)
time.Sleep(d)
f.Log("proxy " + fullUrl + " delay " + d.String())
}
break
case profile.DelayActDropUntil:
d := delay.RandDuration(p.r)
if u != nil && u.DropUntil(d) {
f.Log("proxy " + fullUrl + " drop " + d.String())
net.ResetResponse(w)
return
}
break
case profile.DelayActTimeout:
if delay.Time > 0 {
d := delay.RandDuration(p.r)
time.Sleep(d)
f.Log("proxy " + fullUrl + " timeout " + d.String())
} else {
f.Log("proxy " + fullUrl + " timeout")
}
net.ResetResponse(w)
return
break
}
act := p.urlOp.Action(remoteIP, fullUrl)
//fmt.Println("url act: " + act.String())
speed := p.urlOp.Speed(remoteIP, fullUrl)
bodyDelay := p.urlOp.BodyDelay(remoteIP, fullUrl)
switch act.Act {
case profile.UrlActCache:
needCache = true
case profile.UrlActStatus:
status := 502
if c, err := strconv.Atoi(act.ContentValue); err == nil {
status = c
}
w.WriteHeader(status)
f.Log("proxy " + fullUrl + " status " + strconv.Itoa(status))
return
case profile.UrlActMap:
requestUrl = act.ContentValue
requestR = nil
contentSource = "map " + act.ContentValue
case profile.UrlActRedirect:
http.Redirect(w, r, act.ContentValue, 302)
f.Log("proxy " + fullUrl + " redirect " + act.ContentValue)
return
case profile.UrlActRewritten:
fallthrough
case profile.UrlActRestore:
fallthrough
case profile.UrlActTcpWritten:
if p.rewriteUrl(fullUrl, w, r, rangeInfo, prof, f, act, speed, bodyDelay) {
return
}
}
switch bodyDelay.Act {
case profile.DelayActDelayEach:
fallthrough
case profile.DelayActTimeout:
if writeWrap == nil {
writeWrap = w
}
writeWrap = newDelayWriter(bodyDelay, writeWrap, p.r)
}
switch speed.Act {
case profile.SpeedActConstant:
if writeWrap == nil {
writeWrap = w
}
writeWrap = newSpeedWriter(speed, writeWrap)
}
}
if needCache && r.Method == "GET" && f != nil {
c := f.CheckCache(fullUrl, rangeInfo)
if c != nil && c.Error == nil {
c.Response(w, writeWrap)
return
}
}
dont302 := true
settingContentType := "default"
if prof != nil {
dont302 = prof.SettingDont302(fullUrl)
settingContentType = prof.SettingStringDef(fullUrl, "content-type", settingContentType)
if prof.SettingSwitch(fullUrl, "disable304") {
p.disable304FromHeader(requestR.Header)
}
}
httpStart := time.Now()
resp, postBody, redirection, err := net.NewHttp(requestUrl, requestR, p.parseDomainAsDial(target, remoteIP), dont302)
if err != nil {
c := cache.NewUrlCache(fullUrl, r, nil, nil, contentSource, nil, rangeInfo, httpStart, time.Now(), err)
if f != nil {
go p.saveContentToCache(fullUrl, f, c, false)
}
http.Error(w, "Bad Gateway", 502)
} else if len(redirection) > 0 {
http.Redirect(w, r, redirection, 302)
if f != nil {
f.Log("proxy " + fullUrl + " redirect " + redirection)
}
} else {
defer resp.Close()
p.procHeader(resp.Header(), settingContentType)
content, err := resp.ProxyReturn(w, writeWrap)
httpEnd := time.Now()
c := cache.NewUrlCache(fullUrl, r, postBody, resp, contentSource, content, rangeInfo, httpStart, httpEnd, err)
if f != nil {
go p.saveContentToCache(fullUrl, f, c, needCache)
}
}
}