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parent
0c0458137e
commit
3eb54a8c25
187
main.go
187
main.go
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@ -6,26 +6,44 @@ import (
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"github.com/gorilla/websocket"
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"log"
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"net/http"
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"regexp"
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"strconv"
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"strings"
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"time"
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)
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type fetchData struct {
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url string
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title string
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desc string
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date string
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Url string `json:"url"`
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Title string `json:"title"`
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Desc string `json:"desc"`
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Date string `json:"date"`
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}
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type connChan struct {
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conn string
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msg message
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}
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type dataChan struct {
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conn string
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item []fetchData
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}
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type fetchHandler struct {
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fetchUrl string
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hadFetchData []fetchData
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cronTime time.Duration
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keyword string
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cronTime map[string]time.Duration
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keyword map[string]string
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hadFetchedMap map[string]int
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reloadCron chan int
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reloadCron map[string]chan int
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isOff chan int
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ws *websocket.Conn
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rMsgChan chan message
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newFetchItem chan []fetchData
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rMsgChan chan connChan
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newFetchItem chan dataChan
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connMap map[string]*websocket.Conn
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}
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type setting struct {
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Keyword string `json:"keyword"`
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TimeStep int `json:"timeStep"`
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}
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type message struct {
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@ -35,39 +53,53 @@ type message struct {
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Data interface{}
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}
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func newFetchHandler(fetchUrl, keyword string) *fetchHandler {
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func newFetchHandler(fetchUrl string) *fetchHandler {
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return &fetchHandler{
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fetchUrl: fetchUrl,
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keyword: keyword,
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keyword: make(map[string]string),
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hadFetchedMap: make(map[string]int),
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cronTime: 60 * time.Second,
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reloadCron: make(chan int),
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cronTime: make(map[string]time.Duration),
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reloadCron: make(map[string]chan int),
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isOff: make(chan int),
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rMsgChan: make(chan message, 10),
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newFetchItem: make(chan []fetchData, 10),
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rMsgChan: make(chan connChan, 10),
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newFetchItem: make(chan dataChan, 10),
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connMap: make(map[string]*websocket.Conn),
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}
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}
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func (f *fetchHandler) handle() {
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f.parsesDom(f.fetch(f.fetchUrl + f.keyword))
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func (f *fetchHandler) handle(conn string) {
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key := "纪检"
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if kk, ok := f.keyword[conn]; ok && kk != "" {
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key = kk
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}
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f.parsesDom(f.fetch(f.fetchUrl+key), conn)
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}
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func (f *fetchHandler) receiveMsg() {
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for {
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r := <-f.rMsgChan
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switch r.Action {
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switch r.msg.Action {
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case "search":
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f.handle()
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case "timeStepSet":
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if t, ok := r.Data.(int); ok {
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f.reloadCron <- t
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if t, ok := r.msg.Data.(*setting); ok {
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f.reloadCron[r.conn] <- t.TimeStep
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f.keyword[r.conn] = t.Keyword
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f.handle(r.conn)
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}
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case "timeStepSet":
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if t, ok := r.msg.Data.(int); ok {
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f.reloadCron[r.conn] <- t
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}
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}
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}
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}
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func (f *fetchHandler) fetch(url string) *http.Response {
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defer func() {
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if r := recover(); r != nil {
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log.Println(r)
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}
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}()
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client := http.Client{
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Transport: nil,
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CheckRedirect: nil,
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@ -94,33 +126,55 @@ func (f *fetchHandler) fetch(url string) *http.Response {
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req.Header.Add("postman-token", "81407fbc-2b96-54a7-0193-f640156714ab")
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response, err := client.Do(req)
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if err != nil {
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panic(err)
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}
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return response
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}
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func (f *fetchHandler) parsesDom(html *http.Response) {
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func (f *fetchHandler) parsesDom(html *http.Response, conn string) {
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defer func() {
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if r := recover(); r != nil {
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log.Println(r)
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}
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}()
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doc, err := goquery.NewDocumentFromReader(html.Body)
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if err != nil {
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panic(err)
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}
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var newFetch []fetchData
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ti := time.Now()
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compile := regexp.MustCompile(`(\d+)`)
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doc.Find("div[class=\"result-op c-container xpath-log new-pmd\"]").Each(func(i int, selection *goquery.Selection) {
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data := fetchData{}
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data.url, _ = selection.Attr("mu")
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data.Url, _ = selection.Attr("mu")
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t := selection.Find(".news-title-font_1xS-F").First()
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data.title = t.Text()
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data.desc = selection.Find(".c-row .c-color-text").First().Text()
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k := data.url + "_" + data.title
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var newFetch []fetchData
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data.Title = t.Text()
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data.Desc = selection.Find(".c-row .c-color-text").First().Text()
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data.Date = selection.Find("span[class=\"c-color-gray2 c-font-normal c-gap-right-xsmall\"]").First().Text()
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n := compile.FindAllStringSubmatch(data.Date, -1)
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nn, _ := strconv.Atoi(n[0][0])
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if strings.Contains(data.Date, "小时") {
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data.Date = ti.Add(-time.Duration(nn) * time.Hour).Format("2006-01-02 15:04")
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}
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if strings.Contains(data.Date, "分钟") {
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data.Date = ti.Add(-time.Duration(nn) * time.Minute).Format("2006-01-02 15:04")
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}
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k := conn + "_" + data.Url + "_" + data.Title
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if _, ok := f.hadFetchedMap[k]; !ok {
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f.hadFetchData = append(f.hadFetchData, data)
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f.hadFetchedMap[k] = 1
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newFetch = append(newFetch, data)
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}
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f.newFetchItem <- newFetch
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})
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if len(newFetch) > 0 {
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f.newFetchItem <- dataChan{
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conn: conn,
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item: newFetch,
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}
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}
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err = html.Body.Close()
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if err != nil {
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panic(err)
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@ -130,11 +184,12 @@ func (f *fetchHandler) parsesDom(html *http.Response) {
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func (f *fetchHandler) sendFetchData() {
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for {
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data := <-f.newFetchItem
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err := f.ws.WriteJSON(message{
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err := f.connMap[data.conn].WriteJSON(message{
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Status: true,
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Action: "newData",
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Message: "",
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Data: data,
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Data: data.item,
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})
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if err != nil {
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log.Println(err)
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@ -142,34 +197,46 @@ func (f *fetchHandler) sendFetchData() {
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}
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}
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func (f *fetchHandler) cronFetch() {
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t := time.NewTicker(f.cronTime)
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func (f *fetchHandler) cronFetch(conn string, c chan int) {
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step, ok := f.cronTime[conn]
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if !ok {
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step = time.Second * 60
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}
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t := time.NewTicker(step)
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if _, ok := f.cronTime[conn]; !ok {
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f.reloadCron[conn] = make(chan int)
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}
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defer t.Stop()
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for {
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select {
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case <-t.C:
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f.handle()
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case tt := <-f.reloadCron:
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f.cronTime = time.Duration(tt) * time.Second
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go f.cronFetch()
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f.handle(conn)
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case tt := <-f.reloadCron[conn]:
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f.cronTime[conn] = time.Duration(tt) * time.Second
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go f.cronFetch(conn, c)
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return
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case <-f.isOff:
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case <-c:
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close(c)
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return
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}
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}
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}
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func main() {
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h := newFetchHandler("https://www.baidu.com/s?rtt=1&bsst=1&cl=2&tn=news&rsv_dl=ns_pc&word=", "纪检")
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h := newFetchHandler("https://www.baidu.com/s?rtt=1&bsst=1&cl=2&tn=news&rsv_dl=ns_pc&word=")
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router := gin.Default()
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var upgrader = websocket.Upgrader{}
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var upgrader = websocket.Upgrader{
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CheckOrigin: func(r *http.Request) bool {
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return true
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},
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}
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go h.sendFetchData()
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go h.receiveMsg()
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router.LoadHTMLGlob("templates/*")
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//router.LoadHTMLFiles("templates/template1.html", "templates/template2.html")
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router.GET("/index", func(c *gin.Context) {
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c.HTML(http.StatusOK, "index.gohtml", gin.H{
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"title": "爬虫",
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"keyword": h.keyword,
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"timeStep": h.cronTime.Seconds(),
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})
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})
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router.GET("ws", func(c *gin.Context) {
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@ -181,17 +248,39 @@ func main() {
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Data: nil,
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Action: "upgradeWs",
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})
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log.Println(err)
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return
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}
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h.ws = conn
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msg := message{}
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remote := conn.RemoteAddr().String()
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if _, ok := h.connMap[remote]; !ok {
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h.connMap[remote] = conn
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}
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cc := make(chan int)
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go h.cronFetch(remote, cc)
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go func() {
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msg := connChan{
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conn: remote,
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msg: message{
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Data: &setting{},
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},
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}
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for {
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err := conn.ReadJSON(msg)
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err := conn.ReadJSON(&msg.msg)
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if err != nil {
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if !websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway) {
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delete(h.connMap, remote)
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cc <- 1
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return
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}
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log.Println(err)
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} else {
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h.rMsgChan <- msg
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}
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})
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router.Run(":8080")
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}
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}()
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})
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err := router.Run(":8080")
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if err != nil {
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panic(err)
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}
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}
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