// choose http GET/method to download
func connectByHttp(p *robot.Page, req *robot.Request) (*http.Response, error) {
client := &http.Client{}
httpreq, err := http.NewRequest(req.GetMethod(), req.GetUrl(), strings.NewReader(req.GetPostdata()))
if header := req.GetHeader(); header != nil {
httpreq.Header = req.GetHeader()
}
if cookies := req.GetCookies(); cookies != nil {
for i := range cookies {
httpreq.AddCookie(cookies[i])
}
}
var resp *http.Response
if resp, err = client.Do(httpreq); err != nil {
if e, ok := err.(*url.Error); ok && e.Err != nil && e.Err.Error() == "normal" {
// normal
} else {
mlog.LogInst().LogError(err.Error())
p.SetStatus(true, err.Error())
//fmt.Printf("client do error %v \r\n", err)
return nil, err
}
}
return resp, nil
}
func (self *HttpDownloader) downloadHtml(p *robot.Page, req *robot.Request) *robot.Page {
var err error
p, destbody := self.downloadFile(p, req)
//fmt.Printf("Destbody %v \r\n", destbody)
if !p.IsSucc() {
//fmt.Print("Page error \r\n")
return p
}
bodyReader := bytes.NewReader([]byte(destbody))
var doc *goquery.Document
if doc, err = goquery.NewDocumentFromReader(bodyReader); err != nil {
mlog.LogInst().LogError(err.Error())
p.SetStatus(true, err.Error())
return p
}
var body string
if body, err = doc.Html(); err != nil {
mlog.LogInst().LogError(err.Error())
p.SetStatus(true, err.Error())
return p
}
p.SetBodyStr(body).SetHtmlParser(doc).SetStatus(false, "")
return p
}
func (self *HttpDownloader) downloadJson(p *robot.Page, req *robot.Request) *robot.Page {
var err error
p, destbody := self.downloadFile(p, req)
if !p.IsSucc() {
return p
}
var body []byte
body = []byte(destbody)
mtype := req.GetResponceType()
if mtype == "jsonp" {
tmpstr := goutils.JsonpToJson(destbody)
body = []byte(tmpstr)
}
var r *simplejson.Json
if r, err = simplejson.NewJson(body); err != nil {
mlog.LogInst().LogError(string(body) + "\t" + err.Error())
p.SetStatus(true, err.Error())
return p
}
// json result
p.SetBodyStr(string(body)).SetJson(r).SetStatus(false, "")
return p
}
// Download file and change the charset of page charset.
func (self *HttpDownloader) downloadFile(p *robot.Page, req *robot.Request) (*robot.Page, string) {
var err error
var urlstr string
if urlstr = req.GetUrl(); len(urlstr) == 0 {
mlog.LogInst().LogError("url is empty")
p.SetStatus(true, "url is empty")
return p, ""
}
var resp *http.Response
if proxystr := req.GetProxyHost(); len(proxystr) != 0 {
//using http proxy
//fmt.Print("HttpProxy Enter ",proxystr,"\n")
resp, err = connectByHttpProxy(p, req)
} else {
//normal http download
//fmt.Print("Http Normal Enter \n",proxystr,"\n")
resp, err = connectByHttp(p, req)
}
if err != nil {
return p, ""
}
p.SetHeader(resp.Header)
p.SetCookies(resp.Cookies())
// get converter to utf-8
var bodyStr string
if resp.Header.Get("Content-Encoding") == "gzip" {
bodyStr = self.changeCharsetEncodingAutoGzipSupport(resp.Header.Get("Content-Type"), resp.Body)
} else {
bodyStr = self.changeCharsetEncodingAuto(resp.Header.Get("Content-Type"), resp.Body)
}
//fmt.Printf("utf-8 body %v \r\n", bodyStr)
defer resp.Body.Close()
return p, bodyStr
}