1、找出url汇总页，过滤出满足条件的详情页url；2、去详情页采集信息
package main import (
"fmt" "github.com/gocolly/colly"
"regexp"
"strings" "github.com/mongodb/mongo-go-driver/mongo"
"github.com/mongodb/mongo-go-driver/bson" "context"
"log"
"gopkg.in/mgo.v2"
mgoBson "gopkg.in/mgo.v2/bson"
"time"
"math/rand"
) /*
task
http://www.cnhan.com/hyzx/
http://www.cnhan.com/shantui/
http://www.cnhan.com/pinfo/
http://www.heze.cn/info
http://www.heze.cn/qiye/
http://cn.sonhoo.com/wukong/
采集站点当日更新数据的客户联系方式 20180828
站点日期字符串特征
"cnhan.com/hyzx/": "20180902",
"cnhan.com/shantui/": "20180902",
"cnhan.com/pinfo/": "2018.09.02",
"heze.cn/info/": "2018.09.02",
"heze.cn/qiye/": "2018.09.02",
"sonhoo.com/wukong/": "2018-09-02", 20180904
http://cn.sonhoo.com/wukong/c16?offset=600&limit=50 先去文章含有文章日期的列表页遍历出符合条件的文章url，
再去文章详情页http://cn.sonhoo.com/wukong/a213383采集客户资料 */ type PotentialCustomerWebSiteUrl struct {
Url string `bson:"url"`
} // Configuration | Colly http://go-colly.org/docs/introduction/configuration/
const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ" func RandomString() string {
b := make([]byte, rand.Intn(10)+10)
for i := range b {
b[i] = letterBytes[rand.Intn(len(letterBytes))]
}
return string(b)
} // url汇总页的日期筛选方法
func eggSitePathListTargetDate(TargetDate string) map[string]string {
SitePathListTargetDateFmt := map[string]string{
"cnhan.com/hyzx/": "",
"cnhan.com/shantui/": "ONLYtoday",
"cnhan.com/pinfo/": ".",
"heze.cn/info/": ".",
"heze.cn/qiye/": ".",
"sonhoo.com/wukong/": "-",
}
for k, v := range SitePathListTargetDateFmt {
fmt.Println(k)
if ( v == "") {
SitePathListTargetDateFmt[k] = TargetDate
} else {
SitePathListTargetDateFmt[k] = TargetDate[0:4] + v + TargetDate[4:6] + v + TargetDate[6:8]
}
}
fmt.Println(SitePathListTargetDateFmt)
return SitePathListTargetDateFmt
} // 指定日期数据采集
var TargetDate = "20180904"
var TodayDate = time.Now().Format("20060102")
var mongoCollectioName = "todayUrls0904TestData"
var SitePathListTargetDate = eggSitePathListTargetDate(TargetDate) func getTargetDateSpideredUrl() []string {
//查询mongodb数据
session, err := mgo.Dial("mongodb://hbaseU:[email protected]:27017/hbase")
if err != nil {
panic(err)
}
defer session.Close()
// Optional. Switch the session to a monotonic behavior.
session.SetMode(mgo.Monotonic, true)
Collection := session.DB("hbase").C(mongoCollectioName)
var PotentialCustomerWebSiteUrls [] PotentialCustomerWebSiteUrl
err = Collection.Find(mgoBson.M{"spiderDate": TargetDate}).All(&PotentialCustomerWebSiteUrls)
if err != nil {
log.Fatal(err)
}
var PotentialCustomerWebSiteUrlSet [] string
for i, v := range PotentialCustomerWebSiteUrls {
fmt.Println(i)
fmt.Println(v.Url)
PotentialCustomerWebSiteUrlSet = append(PotentialCustomerWebSiteUrlSet, v.Url)
}
return PotentialCustomerWebSiteUrlSet
} // 检查元素是否存在于数组？遍历？如何集合运算方法
func eleInArr(ele string, arr [] string) bool {
for _, v := range arr {
if (ele == v) {
fmt.Println("eleInArr", ele)
return true
}
}
return false
} func getTargetDateUrls() []string {
var targetDateUrls []string
PotentialCustomerWebSiteUrlSet := getTargetDateSpideredUrl()
c := colly.NewCollector()
if (TargetDate == TodayDate) {
// 路径下只有当日url
// Instantiate default collector
c = colly.NewCollector(
colly.AllowedDomains("www.cnhan.com"),
)
// On every a element which has href attribute call callback
// 类选择器
//url仅在本页
c.OnHTML(".showSort a[href]", func(e *colly.HTMLElement) { link := e.Attr("href")
t := eleInArr(link, PotentialCustomerWebSiteUrlSet)
if (!t) {
targetDateUrls = append(targetDateUrls, link)
fmt.Printf("Link found: %q -> %s\n", e.Text, link)
}
})
// Start scraping on http://www.cnhan.com/shantui/
c.Visit("http://www.cnhan.com/shantui/") // 起始路由改变
// Instantiate default collector
c = colly.NewCollector(
colly.AllowedDomains("www.cnhan.com"),
colly.URLFilters(
//请求页面的正则表达式，满足其一即可
//http://www.cnhan.com/hyzx/
//http://www.cnhan.com/hyzx/index-all-2.html
//硬代码：目标日最多更新99页http://www.cnhan.com/hyzx/index-all-99.html
//^[1-9][0-9]{0,1}[^0-9]{0,1}$
regexp.MustCompile("^http://www.cnhan.com/hyzx/(.{0}$)|(index-all-[1-9][0-9]{0,1}[^0-9]{0,1}\\.html$)"),
),
) // On every a element which has href attribute call callback
c.OnHTML("a[href]", func(e *colly.HTMLElement) {
link := e.Attr("href")
fmt.Printf("Link found: %q -> %s\n", e.Text, link)
c.Visit(e.Request.AbsoluteURL(link))
d := SitePathListTargetDate["cnhan.com/hyzx/"]
reg := regexp.MustCompile(d) // http://www.cnhan.com/hyzx/20180827/7109076.html 通过url格式过滤出目标日的url
data := reg.Find([]byte(link))
regRes := len(data)
if regRes > 0 {
link = "http://www.cnhan.com/hyzx/" + link
t := eleInArr(link, PotentialCustomerWebSiteUrlSet)
if (!t) {
targetDateUrls = append(targetDateUrls, link)
fmt.Printf("Link found: %q -> %s\n", e.Text, link)
}
}
})
// Before making a request print "Visiting ..."
c.OnRequest(func(r *colly.Request) {
fmt.Println("Visiting", r.URL.String())
})
// Start scraping on http://www.cnhan.com/shantui/
c.Visit("http://www.cnhan.com/hyzx/") } // 起始路由改变
// Instantiate default collector
c = colly.NewCollector(
colly.AllowedDomains("www.cnhan.com"),
colly.URLFilters(
//请求页面的正则表达式，满足其一即可
//http://www.cnhan.com/pinfo/
//http://www.cnhan.com/pinfo/index-5.html
//硬代码：目标日最多更新99页http://www.cnhan.com/pinfo/index-99.html
regexp.MustCompile("^http://www.cnhan.com/pinfo/(.{0}$)|(index-[1-9][0-9]{0,1}[^0-9]{0,1}\\.html$)"),
),
)
// On every a element which has href attribute call callback
c.OnHTML("a[href]", func(e *colly.HTMLElement) {
link := e.Attr("href")
fmt.Printf("Link found: %q -> %s\n", e.Text, link)
c.Visit(e.Request.AbsoluteURL(link))
//文本过滤
eDate := e.ChildText(".span2")
//http://www.cnhan.com/pinfo/313257.html 周口水泥彩砖具有的特色是什么2018.08.27
d := SitePathListTargetDate["cnhan.com/pinfo/"]
if (strings.Contains(eDate, d)) {
link := e.Attr("href")
link = "http://www.cnhan.com" + link
fmt.Printf("Link found: %q -> %s\n", e.Text, link)
t := eleInArr(link, PotentialCustomerWebSiteUrlSet)
if (!t) {
targetDateUrls = append(targetDateUrls, link)
fmt.Printf("Link found: %q -> %s\n", e.Text, link)
}
}
})
// Before making a request print "Visiting ..."
c.OnRequest(func(r *colly.Request) {
fmt.Println("Visiting", r.URL.String())
})
// Start scraping on http://www.cnhan.com/shantui/
c.Visit("http://www.cnhan.com/pinfo/") // 起始路由改变
// Instantiate default collector
c = colly.NewCollector(
colly.AllowedDomains("www.heze.cn"),
)
// On every a element which has href attribute call callback
// 类选择器
c.OnHTML(".news_list_r a[href]", func(e *colly.HTMLElement) {
link := e.Attr("href")
fmt.Printf("Link found: %q -> %s\n", e.Text, link)
targetDateUrls = append(targetDateUrls, link)
})
// Start scraping on http://www.cnhan.com/shantui/
c.Visit("http://www.heze.cn/info/") /*
站内目标url
http://www.heze.cn/info/
http://www.heze.cn/qiye/
检测思路：
1、按父url，分别进入 http://www.heze.cn/qiye/18240670888/show-37-1367148.html http://www.heze.cn/info/LEbigong/show-1-13931879.html
与2反
2、按照全站进入
优点：过滤规则简单，代码代码简单；爬取结果数据不便于分类处理，比如产品类型、发布时间；
缺点：爬爬取速度慢
*/ // 起始路由改变
//http://www.heze.cn/qiye/ 该页面、其主体子页面，刷新，内容变化
//http://www.heze.cn/qiye/list-8.html
// Instantiate default collector
c = colly.NewCollector(
colly.AllowedDomains("www.heze.cn"),
colly.URLFilters(
//请求页面的正则表达式，满足其一即可
regexp.MustCompile("^http://www.heze.cn/qiye/(.{0}$)|(list-\\d+-\\d+\\.html$)"),
),
)
// On every a element which has href attribute call callback
c.OnHTML("a[href]", func(e *colly.HTMLElement) {
link := e.Attr("href")
fmt.Printf("Link found: %q -> %s\n", e.Text, link)
c.Visit(e.Request.AbsoluteURL(link))
// http://www.heze.cn/qiye/hongfei688/show-44-14825619.html
reg := regexp.MustCompile("^http://www.heze.cn/qiye/[0-9a-zA-Z]+/show-\\d+-\\d+\\.html$")
data := reg.Find([]byte(link))
regRes := len(data)
if regRes > 0 {
fmt.Printf("Link found: %q -> %s\n", e.Text, link)
t := eleInArr(link, PotentialCustomerWebSiteUrlSet)
if (!t) {
targetDateUrls = append(targetDateUrls, link)
fmt.Printf("Link found: %q -> %s\n", e.Text, link)
}
}
})
// Before making a request print "Visiting ..."
c.OnRequest(func(r *colly.Request) {
fmt.Println("Visiting", r.URL.String())
})
// Start scraping on http://www.heze.cn/qiye/
c.Visit("http://www.heze.cn/qiye/") // 起始路由改变
// 目标日页面部分存在于起始页且与飞目标日页面混杂，无法通过选择器判断，需解析文本
// 全站过滤
// 类目页 http://cn.sonhoo.com/wukong/c133
// 文章页 http://cn.sonhoo.com/wukong/a191114
c = colly.NewCollector(
colly.AllowedDomains("cn.sonhoo.com"),
colly.URLFilters(
//请求页面的正则表达式，满足其一即可
regexp.MustCompile("^http://cn.sonhoo.com/wukong/$"),
//regexp.MustCompile("^http://cn.sonhoo.com/wukong/[ac]{1}\\d+$"),
regexp.MustCompile("^http://cn.sonhoo.com/wukong/[c]{1}\\d+$"),
// http://cn.sonhoo.com/wukong/c0?offset=150&limit=50 文章列表页
regexp.MustCompile("^http://cn.sonhoo.com/wukong/c\\d+\\?offset=\\d+\\&limit=\\d+$"),
),
// 不加UA，无数据
// colly.UserAgent("Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36"),
)
// 限制线程数，引入随机延迟
// Limit the number of threads started by colly to two
// when visiting links which domains' matches "*httpbin.*" glob
c.Limit(&colly.LimitRule{
DomainGlob: "*sonhoo.*",
Parallelism: 5,
RandomDelay: 5 * time.Second,
}) // 保证遍历http://cn.sonhoo.com/wukong/c4?offset=100&limit=50各个页面的，获取可能的目标日的url
// On every a element which has href attribute call callback
c.OnHTML("a[href]", func(e *colly.HTMLElement) {
link := e.Attr("href")
fmt.Printf("Link found: %q -> %s\n", e.Text, link)
c.Visit(e.Request.AbsoluteURL(link))
}) // 目标日的url入库
// div[class=page-articles__articles]>ul>li
c.OnHTML("div[class=page-articles__articles]>ul>li", func(e *colly.HTMLElement) {
link := e.ChildAttr("a", "href")
dat1 := e.ChildText("span")
fmt.Println(dat1)
fmt.Println(link)
pageDate := e.ChildText("span")
d := SitePathListTargetDate["sonhoo.com/wukong/"]
fmt.Println("tDate", d)
fmt.Println("pageDate", pageDate)
if (strings.Contains(pageDate, d)) {
link = "http://cn.sonhoo.com" + link
t := eleInArr(link, PotentialCustomerWebSiteUrlSet)
if (!t) {
targetDateUrls = append(targetDateUrls, link)
fmt.Printf("Link found: %q -> %s\n", e.Text, link)
}
}
c.Visit(e.Request.AbsoluteURL(link))
}) c.OnScraped(func(r *colly.Response) {
fmt.Println("Finished", r.Request.URL)
})
// Before making a request print "Visiting ..."
c.OnRequest(func(r *colly.Request) {
fmt.Println("Visiting", r.URL.String())
r.Headers.Set("User-Agent", RandomString())
})
c.OnError(func(_ *colly.Response, err error) {
log.Println("Something went wrong:", err)
})
c.OnResponse(func(r *colly.Response) {
fmt.Println("Visited", r.Request.URL)
})
// Start scraping on
// http://cn.sonhoo.com/wukong/ 不带日期文章列表页
// http://cn.sonhoo.com/wukong/c0 20180904 带日期的文章列表页：共50页，没有l类目
c.Visit("http://cn.sonhoo.com/wukong/c0")
// 等待线程结束
// Wait until threads are finished
c.Wait() return targetDateUrls
} func main() {
var targetDateUrls = getTargetDateUrls()
fmt.Println(targetDateUrls)
fmt.Println(len(targetDateUrls))
for _, targetDateUrl := range targetDateUrls {
// Instantiate default collector
c := colly.NewCollector()
// On every a element which has href attribute call callback
c.OnScraped(func(r *colly.Response) {
reqUrl := fmt.Sprintln(r.Request.URL)
strings.Replace(reqUrl, "\n", "", -1)
wholePageHtml := string(r.Body)
client, err := mongo.Connect(context.Background(), "mongodb://hbaseU:[email protected]:27017/hbase", nil)
db := client.Database("hbase")
coll := db.Collection(mongoCollectioName)
if err != nil {
fmt.Println(err)
}
//目标日多次采集，目标日同站点且同路径url不重复入库
//存入时间戳，分析目标站点的信息更新规律
result, err := coll.InsertOne(
context.Background(),
bson.NewDocument(
bson.EC.String("spiderDate", TargetDate),
bson.EC.String("url", reqUrl),
bson.EC.String("html", wholePageHtml),
))
fmt.Println(err)
fmt.Println(result)
})
c.Visit(targetDateUrl)
}
}