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//
package main
import (
"encoding/csv"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"os"
"strconv"
"strings"
"github.com/PuerkitoBio/goquery"
"github.com/bitly/go-simplejson"
"github.com/hu17889/go_spider/core/common/com_interfaces"
"github.com/hu17889/go_spider/core/common/page"
"github.com/hu17889/go_spider/core/common/page_items"
"github.com/hu17889/go_spider/core/pipeline"
"github.com/hu17889/go_spider/core/spider"
)
const (
helpUrl = "https://list.jd.com/"
queryFmtUrl = "http://pm.3.cn/prices/pcpmgets?type=1&skuIds=%v&origin=2"
)
var filed = []string{"name", "sku", "price", "price_m", "price_op"}
type HelperPageProcesser struct {
param interface{}
}
func NewHelperPageProcesser() *HelperPageProcesser {
return &HelperPageProcesser{}
}
type ContentPageProcesser struct {
pipe *ContentConsole
}
func NewContentPageProcesser() *ContentPageProcesser {
return &ContentPageProcesser{}
}
type ContentConsole struct {
chanOutput chan interface{}
filePath string
csvHead []string
w *csv.Writer
}
func NewContentConsole(chanNum int, filename string) *ContentConsole {
outPath, _ := os.Getwd()
outPath = outPath + string(os.PathSeparator) + filename
return &ContentConsole{chanOutput: make(chan interface{}, chanNum), filePath: outPath}
}
func (this *ContentConsole) InitOutput(head []string) {
f, err := os.Create(this.filePath)
if err != nil {
return
}
f.WriteString("\xEF\xBB\xBF") // Write UTF-8 BOM
w := csv.NewWriter(f)
w.Write(head)
w.Flush()
this.w = w
this.csvHead = head
go func() {
for {
var wbuff []string
item := <-this.chanOutput
if v, ok := item.(*simplejson.Json); ok {
for _, heads := range this.csvHead {
tmpstr, _ := v.Get(heads).String()
wbuff = append(wbuff, tmpstr)
}
}
this.w.Write(wbuff)
this.w.Flush()
}
}()
}
//pipe 输出有bug，不能获取到所有添加项，因此不在这里默认处理输出
func (this *ContentConsole) Process(items *page_items.PageItems, t com_interfaces.Task) {
//println("----------------------------------------------------------------------------------------------")
//println("Crawled url :\t" + items.GetRequest().GetUrl() + "\n")
//println("Crawled result : ")
// newjs := simplejson.New()
// for key, value := range items.GetAll() {
// newjs.Set(key, value)
// println(key + "\t:\t" + value)
// }
// this.chanOutput <- newjs
}
func (this *HelperPageProcesser) Process(p *page.Page) {
query := p.GetHtmlParser()
var urls []string
maxnum := 0
var hrefurl string
query.Find("div[class=p-wrap] a").Each(func(i int, s *goquery.Selection) {
num, err := strconv.Atoi(s.Text())
if err == nil {
if hrefurl == "" {
href, _ := s.Attr("href")
hrefurl = helpUrl + href
}
if num > maxnum {
maxnum = num
}
}
})
listurl, _ := url.Parse(hrefurl)
queryvalues := listurl.Query()
for i := 1; i <= maxnum; i++ {
queryvalues["page"] = []string{strconv.Itoa(i)}
urls = append(urls, helpUrl+strings.TrimLeft(listurl.Path, "/")+"?"+url.Values(queryvalues).Encode())
}
pageProcess := NewContentPageProcesser()
pageProcess.pipe, _ = this.param.(*ContentConsole)
spider.NewSpider(pageProcess, "ContentTask").
AddUrls(urls, "html").
AddPipeline(pageProcess.pipe).
SetThreadnum(5).
Run()
}
func (this *ContentPageProcesser) Process(p *page.Page) {
query := p.GetHtmlParser()
query.Find("li[class=gl-item]").Each(func(i int, s *goquery.Selection) {
skusel := s.Find("div")
pname := s.Find("em")
datasku, _ := skusel.Attr("data-sku")
queryUrl := fmt.Sprintf(queryFmtUrl, datasku)
client := &http.Client{}
req, err := http.NewRequest("GET", queryUrl, nil)
if err != nil {
fmt.Println(err)
return
}
resp, err := client.Do(req)
if err != nil {
fmt.Println(err)
return
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
fmt.Println(err)
return
}
jsContent, _ := simplejson.NewJson([]byte(body))
jsInner := jsContent.GetIndex(0)
//p.AddField(filed[0], pname.Text())
//p.AddField(filed[1], datasku)
//p.AddField(filed[2], jsInner.Get("p").MustString())
//p.AddField(filed[3], jsInner.Get("m").MustString())
//p.AddField(filed[4], jsInner.Get("op").MustString())
newjs := simplejson.New()
newjs.Set(filed[0], pname.Text())
newjs.Set(filed[1], datasku)
newjs.Set(filed[2], jsInner.Get("p").MustString())
newjs.Set(filed[3], jsInner.Get("m").MustString())
newjs.Set(filed[4], jsInner.Get("op").MustString())
go func() {
this.pipe.chanOutput <- newjs
}()
fmt.Print(pname.Text())
fmt.Println(datasku)
fmt.Println(jsInner.Get("p").MustString())
})
}
func (this *ContentPageProcesser) Finish() {
}
func (this *HelperPageProcesser) Finish() {
fmt.Printf("end spider \r\n")
}
func main() {
contentPipe := NewContentConsole(100, "info.cvs")
contentPipe.InitOutput(filed)
helpProcess := NewHelperPageProcesser()
helpProcess.param = contentPipe
spider.NewSpider(helpProcess, "TaskName").
//AddUrl("https://list.jd.com/list.html?cat=1319,1527,1557", "html").
AddUrls([]string{"https://list.jd.com/list.html?cat=9987,653,655",
"https://list.jd.com/list.html?cat=670,671,672"}, "html"). // start url, html is the responce type ("html" or "json")
AddPipeline(pipeline.NewPipelineConsole()). // print result on screen
SetThreadnum(1). // crawl request by three Coroutines
Run()
}
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