/
chrome.go
170 lines (131 loc) · 3.52 KB
/
chrome.go
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package chrome
import (
"context"
"errors"
"strings"
"sync"
"github.com/Hecatoncheir/BrowserWrapper/browser"
"github.com/PuerkitoBio/goquery"
"github.com/chromedp/chromedp"
)
type Chrome struct {
isClosed bool
chromeContext context.Context
chromeContextCancel context.CancelFunc
tabsMutex sync.Mutex
Tabs map[int]browser.TabInterface
Downloader *Downloader
}
func (chrome *Chrome) GetPage(url string) (*goquery.Document, error) {
return chrome.WaitElementAndGetPage(url, "body")
}
func (chrome *Chrome) WaitElementAndGetPage(pageUrl, elementSelector string) (*goquery.Document, error) {
html, err := chrome.WaitElementAndGetHtmlOfPage(pageUrl, elementSelector)
if err != nil {
return nil, err
}
document, err := goquery.NewDocumentFromReader(strings.NewReader(html))
if err != nil {
return nil, err
}
return document, nil
}
func (chrome *Chrome) Download(url string) ([]byte, error) {
bytes, err := chrome.Downloader.Download(url)
if err != nil || len(bytes) == 0 {
return chrome.Downloader.Download(url)
}
return bytes, err
}
func (chrome *Chrome) GetHtmlOfPage(url string) (string, error) {
return chrome.WaitElementAndGetHtmlOfPage(url, "body")
}
func (chrome *Chrome) GetTab(tabNumber int) (tab browser.TabInterface, err error) {
tab = chrome.Tabs[tabNumber]
if tab != nil {
return tab, nil
} else {
return nil, errors.New("not tab found")
}
}
func (chrome *Chrome) OpenTab() (tab browser.TabInterface, tabNumber int, err error) {
chrome.tabsMutex.Lock()
tab, err = NewTabForChrome(chrome.chromeContext)
if err != nil {
return nil, 0, err
}
tabNumber = len(chrome.Tabs) + 1
chrome.Tabs[tabNumber] = tab
chrome.tabsMutex.Unlock()
return tab, tabNumber, nil
}
func (chrome *Chrome) CloseTab(tabNumber int) error {
chrome.tabsMutex.Lock()
tab, err := chrome.GetTab(tabNumber)
if err != nil {
return err
}
err = tab.Close()
if err != nil {
return err
}
delete(chrome.Tabs, tabNumber)
chrome.tabsMutex.Unlock()
return nil
}
func (chrome *Chrome) WaitElementAndGetHtmlOfPage(pageUrl, elementSelector string) (string, error) {
tab, tabNumber, err := chrome.OpenTab()
if err != nil {
return "", err
}
html, err := tab.WaitElementAndGetHtmlOfPage(pageUrl, elementSelector)
if err != nil {
return "", err
}
err = chrome.CloseTab(tabNumber)
if err != nil {
return "", err
}
return html, nil
}
func (chrome *Chrome) DownloadFileBySelector(pageUrl, selector, attribute string) (bytes []byte, fileName, fileExtension, fileUrl string, err error) {
page, err := chrome.WaitElementAndGetPage(pageUrl, selector)
if err != nil {
return nil, "", "", "", err
}
fileSrc, isExists := page.Find(selector).Attr(attribute)
if !isExists {
err := browser.ElementBySelectorDoesNotExist
return nil, "", "", "", err
}
bytes, err = chrome.Download(fileSrc)
if err != nil {
return nil, "", "", "", err
}
fileSrcSegments := strings.Split(fileSrc, "/")
fileName = fileSrcSegments[len(fileSrcSegments)-1]
fileWithExtension := strings.Split(fileName, ".")
fileExtension = fileWithExtension[len(fileWithExtension)-1]
return bytes, fileName, fileExtension, fileSrc, nil
}
func (chrome *Chrome) IsClosed() bool {
return chrome.isClosed
}
func (chrome *Chrome) Close() error {
if chrome.isClosed {
return nil
}
for tabNumber := range chrome.Tabs {
err := chrome.CloseTab(tabNumber)
if err != nil {
return err
}
}
err := chromedp.Cancel(chrome.chromeContext)
if err != nil {
return err
}
chrome.chromeContextCancel()
chrome.isClosed = true
return nil
}