141 lines
2.4 KiB
Go
141 lines
2.4 KiB
Go
package geziyor
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import (
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"bytes"
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"fmt"
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"github.com/PuerkitoBio/goquery"
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"github.com/fpfeng/httpcache"
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"io/ioutil"
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"log"
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"net/http"
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"net/url"
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"os"
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"sync"
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"time"
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)
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type Geziyor struct {
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client *http.Client
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wg sync.WaitGroup
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opt Opt
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visitedURLS []string
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}
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type Opt struct {
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AllowedDomains []string
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StartURLs []string
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ParseFunc func(response *Response)
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Cache httpcache.Cache
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}
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func init() {
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log.SetOutput(os.Stdout)
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}
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func NewGeziyor(opt Opt) *Geziyor {
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geziyor := &Geziyor{
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client: &http.Client{
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Timeout: time.Second * 10,
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},
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opt: opt,
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}
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if opt.Cache != nil {
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geziyor.client.Transport = httpcache.NewTransport(opt.Cache)
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}
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return geziyor
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}
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func (g *Geziyor) Start() {
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for _, startURL := range g.opt.StartURLs {
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go g.Get(startURL)
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}
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time.Sleep(time.Millisecond)
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g.wg.Wait()
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}
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func (g *Geziyor) Get(rawURL string) {
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g.wg.Add(1)
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defer g.wg.Done()
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if !checkURL(rawURL, g) {
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return
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}
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// Log
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log.Println("Fetching: ", rawURL)
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// Get request
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resp, err := g.client.Get(rawURL)
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if resp != nil {
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defer resp.Body.Close()
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}
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if err != nil {
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return
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}
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// Read body
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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fmt.Fprintf(os.Stderr, "reading body error: %v\n", err)
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return
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}
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// Create Document
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doc, _ := goquery.NewDocumentFromReader(bytes.NewReader(body))
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// Create response
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response := Response{
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Response: resp,
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Body: body,
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Doc: doc,
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Geziyor: g,
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Exports: make(chan map[string]interface{}, 1),
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}
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// Export Function
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go Export(&response)
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// ParseFunc response
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g.opt.ParseFunc(&response)
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time.Sleep(time.Millisecond)
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}
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func checkURL(rawURL string, g *Geziyor) bool {
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// Parse URL
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parsedURL, err := url.Parse(rawURL)
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if err != nil {
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fmt.Fprintf(os.Stderr, "url parsing error: %v\n", err)
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return false
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}
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// Check for allowed domains
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if len(g.opt.AllowedDomains) != 0 && !Contains(g.opt.AllowedDomains, parsedURL.Host) {
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log.Printf("Domain not allowed: %s\n", parsedURL.Host)
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return false
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}
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// Check for duplicate requests
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if Contains(g.visitedURLS, rawURL) {
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log.Printf("URL already visited %s\n", rawURL)
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return false
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}
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g.visitedURLS = append(g.visitedURLS, rawURL)
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return true
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}
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// Contains checks whether []string contains string
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func Contains(s []string, e string) bool {
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for _, a := range s {
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if a == e {
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return true
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}
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}
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return false
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}
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