/
main.go
141 lines (125 loc) · 3.1 KB
/
main.go
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package main
import (
"fmt"
"github.com/PuerkitoBio/goquery"
"log"
"net/http"
"net/url"
"strconv"
"strings"
)
type Entry struct {
Description string
Type string
Price string
ManufactureDate string
Condition string
Link string
}
type Crawler interface {
Crawl() []Entry
}
type Boot24Crawler struct {
}
func (c Boot24Crawler) Create(s *goquery.Selection) Entry {
link := s.AttrOr("href", "none")
price := s.Find(".sr-price").Text()
desc := s.Find(".sr-objektbox-us").Text()
details := strings.Fields(s.Find(".details_left").Text())
boatType := details[0]
manufactureDate := details[3]
condition := details[5]
return Entry{
Condition: condition,
Description: desc,
Link: link,
ManufactureDate: manufactureDate,
Price: price,
Type: boatType,
}
}
func (c Boot24Crawler) GetLastPage(doc *goquery.Document) int {
pageNumbers := []int{}
doc.Find(".main-content-norm .sitenumber a.seite").Each(func(i int, s *goquery.Selection) {
pageNumber, err := strconv.Atoi(s.Text())
if err != nil {
log.Fatal(err)
}
pageNumbers = append(pageNumbers, pageNumber)
})
return pageNumbers[len(pageNumbers)-1]
}
func (c Boot24Crawler) Values() url.Values {
v := url.Values{}
v.Add("typ", "t6")
v.Add("new", "true")
v.Add("text", "")
v.Add("kategorie", "")
v.Add("new_used", "")
v.Add("material", "")
v.Add("currency", "EUR")
v.Add("preisMin", "")
v.Add("preisMax", "")
v.Add("motorenEinheit", "1.00")
v.Add("motorenLeistungMin", "")
v.Add("motorenLeistungMax", "")
v.Add("baujahrVon", "")
v.Add("baujahrBis", "")
v.Add("laengeMin", "")
v.Add("laengeMax", "")
v.Add("antriebArt", "")
v.Add("antriebWie", "")
v.Add("liegeplatz", "")
return v
}
func (c Boot24Crawler) QueryPage(page int) *http.Response {
url := fmt.Sprintf("http://www.boot24.com/suchergebnis/segelboot.php?page=%d&pagesize=3", page)
res, err := http.PostForm(url, c.Values())
if err != nil {
log.Fatal(err)
}
return res
}
func (c Boot24Crawler) ParsePage(res *http.Response) *goquery.Document {
doc, err := goquery.NewDocumentFromResponse(res)
if err != nil {
log.Fatal(err)
}
return doc
}
func (c Boot24Crawler) ProcessDoc(doc *goquery.Document) []Entry {
entries := []Entry{}
doc.Find("#res").Each(func(i int, s *goquery.Selection) {
s.Find(".sr-objektbox-in").Each(func(i int, s *goquery.Selection) {
entry := c.Create(s)
entries = append(entries, entry)
})
})
return entries
}
func (c Boot24Crawler) Crawl() []Entry {
result := []Entry{}
// crawl first page
currentPage := 1
res := c.QueryPage(currentPage)
doc := c.ParsePage(res)
tmp := c.ProcessDoc(doc)
result = append(result, tmp...)
// crawl remaining pages
currentPage += 1
lastPage := c.GetLastPage(doc) - 1
for currentPage < lastPage {
log.Printf("Processing page %d of %d", currentPage, lastPage)
res := c.QueryPage(currentPage)
doc := c.ParsePage(res)
tmp := c.ProcessDoc(doc)
result = append(result, tmp...)
currentPage += 1
log.Println("Finished.")
}
return result
}
func main() {
crawler := Boot24Crawler{}
fmt.Println(crawler.Crawl())
}