forked from csal/timewire
/
timewire.go
68 lines (62 loc) · 1.68 KB
/
timewire.go
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package main
import (
"net/http"
"fmt"
"io"
"exp/html"
"bytes"
)
func extractLinks(resp io.Reader) []string {
var links = make([]string, 1000)
anchorTag := []byte{'a'}
tkzer := html.NewTokenizer(resp)
var more bool
var value []byte
var key []byte
eof := false
i := 0
for {
if eof == true {
break
}
switch tkzer.Next() {
case html.ErrorToken:
if tkzer.Err() == io.EOF {
eof = true
}
case html.StartTagToken:
tag, hasAttr := tkzer.TagName()
if hasAttr && bytes.Equal(anchorTag, tag) {
more = true
for more==true {
key, value, more = tkzer.TagAttr()
if string(key) == "href" {
more = false
fmt.Printf("%d\n", string(value), len(links))
links[i] = string(value)
i++
}
}
}
}
}
return links
}
func getUrl(url string) []string {
resp, err := http.Get(url)
defer resp.Body.Close()
var links []string
if err != nil {
panic("couldn't get the url")
} else {
links = extractLinks(resp.Body)
}
return links
}
func Crawl(url string) {
links := getUrl(url)
fmt.Printf("%v", links[50])
}
func main() {
Crawl("http://www.bbc.co.uk/sport/0/football/")
}