// Scrape scrapes a site for a keyword
func (q *query) Scrape() []*match {
// Request the URL
resp, err := http.Get(q.SiteURL)
if err != nil {
panic(err)
log.Fatal("Couldn't GET ", q.SiteURL)
}
// Parse the contents of the URL
root, err := html.Parse(resp.Body)
if err != nil {
panic(err)
log.Fatal("Unable to parse response")
}
// Grab all the posts and print them
posts := scrape.FindAll(root, scrape.ByClass("description"))
matches := make([]*match, len(posts))
for i, post := range posts {
matches[i] = &match{
Title: scrape.Text(post.FirstChild.NextSibling),
Description: scrape.Text(post),
Link: "http://kijiji.ca" + scrape.Attr(post.FirstChild.NextSibling, "href"),
Price: scrape.Text(post.NextSibling.NextSibling),
Matched: false,
}
}
return matches
}
// parseCurrentSchedule parses the courses from the schedule list view page.
//
// If fetchMoreInfo is true, this will perform a request for each component to find out information
// about it.
func parseSchedule(rootNode *html.Node) ([]Course, error) {
courseTables := scrape.FindAll(rootNode, scrape.ByClass("PSGROUPBOXWBO"))
result := make([]Course, 0, len(courseTables))
for _, classTable := range courseTables {
println("found course")
titleElement, ok := scrape.Find(classTable, scrape.ByClass("PAGROUPDIVIDER"))
if !ok {
// This will occur at least once, since the filter options are a PSGROUPBOXWBO.
continue
}
infoTables := scrape.FindAll(classTable, scrape.ByClass("PSLEVEL3GRIDNBO"))
if len(infoTables) != 2 {
return nil, errors.New("expected exactly 2 info tables but found " +
strconv.Itoa(len(infoTables)))
}
courseInfoTable := infoTables[0]
course, err := parseCourseInfoTable(courseInfoTable)
if err != nil {
return nil, err
}
// NOTE: there isn't really a standard way to parse the department/number.
course.Name = nodeInnerText(titleElement)
componentsInfoTable := infoTables[1]
componentMaps, err := tableEntriesAsMaps(componentsInfoTable)
if err != nil {
return nil, err
}
course.Components = make([]Component, len(componentMaps))
for i, componentMap := range componentMaps {
course.Components[i], err = parseComponentInfoMap(componentMap)
if err != nil {
return nil, err
}
}
result = append(result, course)
}
return result, nil
}
func getLink(r *html.Node) (s string) {
buttons := scrape.FindAll(r, scrape.ByClass("downloadbtn"))
for _, button := range buttons {
windowLocation := scrape.Attr(button, "onclick")
link := strings.Split(windowLocation, "=")[1]
s := strings.Trim(link, "'")
return s
}
return
}
func parseHistoryItems(rootNode *html.Node) []*YoutubeVideoInfo {
videoElements := scrape.FindAll(rootNode, scrape.ByClass("yt-lockup-video"))
res := make([]*YoutubeVideoInfo, len(videoElements))
for i, element := range videoElements {
res[i] = parseVideoInfo(element)
}
return res
}
// Get devuelve el conjunto de tiempos de llegada para los buses de la parada
// dada. Hay que comprobar que no se devuelve error.
func Get(parada int) (TiemposParada, error) {
resp, err := http.Get("http://www.auvasa.es/paradamb.asp?codigo=" +
strconv.Itoa(parada))
if err != nil {
return TiemposParada{}, errors.New("Error al conectar con el servidor de AUVASA.")
}
rInUTF8 := transform.NewReader(resp.Body, charmap.Windows1252.NewDecoder())
root, err := html.Parse(rInUTF8)
if err != nil {
return TiemposParada{}, errors.New("Error en la respuesta de AUVASA.")
}
headers := scrape.FindAll(root, scrape.ByTag(atom.H1))
if len(headers) < 2 {
return TiemposParada{}, errors.New("La parada indicada parece errónea.")
}
lineasTiempos := scrape.FindAll(root, scrape.ByClass("style36"))
resultados := make([]ProximoBus, len(lineasTiempos))
for i, item := range lineasTiempos {
valores := scrape.FindAll(item, scrape.ByClass("style38"))
resultados[i] = ProximoBus{
Linea: scrape.Text(valores[0]),
Destino: scrape.Text(valores[2]),
Minutos: scrape.Text(valores[3]),
}
}
if len(resultados) == 0 {
return TiemposParada{}, errors.New("No hay tiempos para la parada especificada. Puede que sea errónea o que ya no haya buses.")
}
return TiemposParada{
Nombre: scrape.Text(headers[1]),
Tiempos: resultados,
Momento: time.Now(),
Codigo: parada,
}, nil
}
func ParseName(n *html.Node) (string, string, string) {
matcher := func(n *html.Node) bool {
// must check for nil values
if n.DataAtom == atom.A && n.Parent.DataAtom == atom.Td {
return true
}
return false
}
var name, magnet, desc string
if detName, ok := scrape.Find(n, scrape.ByClass("detName")); ok {
name = scrape.Text(detName)
}
if anchor, ok := scrape.Find(n, matcher); ok {
magnet = scrape.Attr(anchor, "href")
}
if detDesc, ok := scrape.Find(n, scrape.ByClass("detDesc")); ok {
desc = scrape.Text(detDesc)
}
return name, magnet, desc
}
func parseVideoInfo(element *html.Node) *YoutubeVideoInfo {
var info YoutubeVideoInfo
info.ID = scrape.Attr(element, "data-context-item-id")
thumbnailContainer, ok := scrape.Find(element, scrape.ByClass("yt-thumb-simple"))
if ok {
thumbnailImage, ok := scrape.Find(thumbnailContainer, scrape.ByTag(atom.Img))
if ok {
info.ThumbnailURL, _ = url.Parse(scrape.Attr(thumbnailImage, "src"))
}
}
videoTimeElement, ok := scrape.Find(element, scrape.ByClass("video-time"))
if ok {
durationStr := strings.TrimSpace(scrape.Text(videoTimeElement))
info.Length, _ = parseVideoDuration(durationStr)
}
linkFieldClasses := []string{"yt-lockup-title", "yt-lockup-byline"}
linkFieldPtrs := []*string{&info.Title, &info.Author}
for i, class := range linkFieldClasses {
linkContainer, ok := scrape.Find(element, scrape.ByClass(class))
if ok {
link, ok := scrape.Find(linkContainer, scrape.ByTag(atom.A))
if ok {
*linkFieldPtrs[i] = strings.TrimSpace(scrape.Text(link))
}
}
}
descBox, ok := scrape.Find(element, scrape.ByClass("yt-lockup-description"))
if ok {
info.Description = strings.TrimSpace(scrape.Text(descBox))
}
return &info
}
// fetchExtraScheduleInfo gets more information about each component.
//
// The rootNode argument should be the parsed schedule list view.
func fetchExtraScheduleInfo(client *http.Client, courses []Course, rootNode *html.Node) error {
psForm, ok := scrape.Find(rootNode, scrape.ByClass("PSForm"))
if !ok {
return errors.New("could not find PSForm")
}
icsid, ok := scrape.Find(psForm, scrape.ById("ICSID"))
if !ok {
return errors.New("could not find ICSID")
}
formAction := getNodeAttribute(psForm, "action")
sid := getNodeAttribute(icsid, "value")
// TODO: figure out if there's a way to make this more robust or to load it lazily.
sectionIndex := 0
for courseIndex := range courses {
course := &courses[courseIndex]
for componentIndex := range course.Components {
component := &course.Components[componentIndex]
postData := generateClassDetailForm(sid, sectionIndex)
res, reqErr := client.PostForm(formAction, postData)
if res != nil {
defer res.Body.Close()
}
if reqErr != nil {
return reqErr
}
courseOpen, parseErr := parseExtraComponentInfo(res.Body, component)
if parseErr != nil {
return parseErr
}
course.Open = &courseOpen
postData = generateClassDetailBackForm(sid, sectionIndex)
res, reqErr = client.PostForm(formAction, postData)
if res != nil {
defer res.Body.Close()
}
if reqErr != nil {
return reqErr
}
sectionIndex++
}
}
return nil
}
func NewListing(ctx appengine.Context, url string) (*Listing, error) {
client := urlfetch.Client(ctx)
resp, err := client.Get("http://167.88.16.61:2138/" + url)
if err != nil {
ctx.Errorf("%s", err)
}
ctx.Debugf("Craigslist request came back with status: %s", resp.Status)
if err != nil {
ctx.Errorf("%s", err)
return nil, errors.New("Get listing failed")
}
root, err := html.Parse(resp.Body)
if err != nil {
ctx.Errorf("%s", "Parsing Error")
return nil, errors.New("Parse body failed")
}
title, ok := scrape.Find(root, scrape.ByTag(atom.Title))
if !ok {
ctx.Errorf("%s", "Error getting title")
return nil, errors.New("Get title failed")
}
price, ok := scrape.Find(root, scrape.ByClass("price"))
if !ok {
ctx.Errorf("%s", "Error getting price")
return nil, errors.New("Get price failed")
}
intPrice, err := strconv.Atoi(scrape.Text(price)[1:])
if err != nil {
ctx.Errorf("Error casting price: %s", scrape.Text(price))
return nil, err
}
images := scrape.FindAll(root, scrape.ByTag(atom.Img))
imageUrl := ""
for _, image := range images {
if scrape.Attr(image, "title") == "image 1" {
imageUrl = scrape.Attr(image, "src")
}
}
ctx.Debugf("Craigslist returned listing.Price: %d, listing.Title: %s", intPrice, scrape.Text(title))
return &Listing{
Url: url,
Title: scrape.Text(title),
Price: intPrice,
ImageUrl: imageUrl,
}, nil
}
// History asynchronously fetches the user's
// video viewing history.
// You may provide a cancel channel which you
// can close to cancel the fetch mid-way.
func (y *Youtube) History(cancel <-chan struct{}) (<-chan *YoutubeVideoInfo, <-chan error) {
videoChan := make(chan *YoutubeVideoInfo)
errChan := make(chan error, 1)
go func() {
defer close(videoChan)
defer close(errChan)
historyReq, _ := http.NewRequest("GET", "https://www.youtube.com/feed/history", nil)
historyReq.Header.Set("User-Agent", spoofedUserAgent)
resp, err := y.s.Do(historyReq)
rootNode, err := html.Parse(resp.Body)
resp.Body.Close()
if err != nil {
errChan <- err
return
}
loadMoreHTML := rootNode
contentHTML := rootNode
for {
items := parseHistoryItems(contentHTML)
for _, item := range items {
select {
case videoChan <- item:
case <-cancel:
return
}
}
if loadMoreHTML == nil {
break
}
loadButton, ok := scrape.Find(loadMoreHTML, scrape.ByClass("yt-uix-load-more"))
if ok {
morePath := scrape.Attr(loadButton, "data-uix-load-more-href")
loadMoreHTML, contentHTML, err = y.fetchMoreHistory(morePath)
if err != nil {
errChan <- err
return
}
}
}
}()
return videoChan, errChan
}
func parsepost(n *html.Node) Post {
post := Post{}
// get the title. uses a scrape inbuilt matcher
title_scrape, _ := scrape.Find(n, scrape.ByClass("title"))
title := scrape.Text(title_scrape.FirstChild)
// get the subreddit. This requires a custom matcher.
matcher := func(n *html.Node) bool {
if n.DataAtom == atom.A && n.Parent != nil {
return scrape.Attr(n, "class") == "subreddit hover may-blank"
}
return false
}
sub, _ := scrape.Find(n, matcher)
subreddit := scrape.Text(sub)
// get the url to the comments. requires custom matcher.
matcher = func(n *html.Node) bool {
if n.DataAtom == atom.Ul && n.FirstChild != nil {
return scrape.Attr(n, "class") == "flat-list buttons" && scrape.Attr(n.FirstChild, "class") == "first"
}
return false
}
ul, _ := scrape.Find(n, matcher) // ul is a list of two buttons: one that links to a post's comments page, one a "share" function
li := ul.FirstChild // the first list item of ul -- this will always be the comments page link.
url := scrape.Attr(li.FirstChild, "href") // finally, the url found in the list item.
// get the author. Uses custom matcher and magic.
matcher = func(n *html.Node) bool {
if n.DataAtom == atom.A && n.Parent.DataAtom == atom.P {
return strings.Contains(scrape.Attr(n, "href"), "/user/")
}
return false
}
author_scrape, _ := scrape.Find(n, matcher)
author := scrape.Text(author_scrape)
post.title = title
post.subreddit = subreddit
post.url = url
post.author = author
return post
}
func main() {
client := &http.Client{}
req, err := http.NewRequest("GET", "http://whatsmyuseragent.com/", nil)
if err != nil {
panic(err)
}
req.Header.Set("User-Agent", ua)
resp, err := client.Do(req)
// resp, err := http.Get("http://whatsmyuseragent.com/")
if err != nil {
panic(err)
}
root, err := html.Parse(resp.Body)
if err != nil {
panic(err)
}
defer resp.Body.Close()
info := scrape.ByClass("info")
data := scrape.FindAll(root, info)
for _, v := range data {
fmt.Printf("%s\n", scrape.Text(v))
}
}
func main() {
router := gin.Default()
router.GET("/movie/amazon/:amazon_id", func(c *gin.Context) {
id, valid := validateAndFormatAmazonID(c.Param("amazon_id"))
if !valid {
c.JSON(http.StatusInternalServerError, gin.H{
"error": "invalid amazon id",
"id": id,
})
return
}
resp, err := http.Get("http://www.amazon.de/gp/product/" + id)
if err != nil {
c.JSON(http.StatusInternalServerError, gin.H{
"error": err,
})
return
}
//item does not exist in amazon.de
if resp.StatusCode == http.StatusNotFound {
c.JSON(http.StatusNotFound, gin.H{
"error": "product not available",
})
return
}
root, err := html.Parse(resp.Body)
if err != nil {
c.JSON(http.StatusInternalServerError, gin.H{
"error": err,
})
return
}
actorsMatcher := func(n *html.Node) bool {
if n.DataAtom == atom.Dd && n.Parent != nil &&
n.PrevSibling != nil && n.PrevSibling.PrevSibling != nil {
return scrape.Attr(n.Parent, "class") == "dv-meta-info size-small" &&
scrape.Text(n.PrevSibling.PrevSibling) == "Darsteller:"
}
return false
}
posterMatcher := func(n *html.Node) bool {
if n.DataAtom == atom.Img && n.Parent != nil {
return scrape.Attr(n.Parent, "class") == "dp-meta-icon-container"
}
return false
}
//NOTE: Since this is a demo, I assume matchers will always hit a result
movie := &Movie{}
titleNode, _ := scrape.Find(root, scrape.ById("aiv-content-title"))
movie.Title = scrape.Text(titleNode.FirstChild)
releaseYearNode, _ := scrape.Find(root, scrape.ByClass("release-year"))
year, _ := strconv.Atoi(scrape.Text(releaseYearNode))
movie.ReleaseYear = year
actorsNode, _ := scrape.Find(root, actorsMatcher)
movie.Actors = strings.Split(scrape.Text(actorsNode), ",")
posterNode, _ := scrape.Find(root, posterMatcher)
movie.Poster = scrape.Attr(posterNode, "src")
movieNodes := scrape.FindAll(root, scrape.ByClass("downloadable_movie"))
ids := make([]string, len(movieNodes))
for i, movieNode := range movieNodes {
ids[i] = scrape.Attr(movieNode, "data-asin")
}
movie.SimilarIDs = ids
c.JSON(http.StatusOK, movie)
})
router.Run(":8080")
}
//LivescoreParser parse livescore
func LivescoreParser(root *html.Node) []Match {
var matches []Match
contentElmt, contentOK := scrape.Find(root, scrape.ByClass(classContentTag))
if contentOK {
//find all row-gray
rowGrayMatcher := func(n *html.Node) bool {
classes := strings.Fields(scrape.Attr(n, "class"))
for _, c := range classes {
if c == classRowGray {
parentClasses := strings.Fields(scrape.Attr(n.Parent, "class"))
for _, pc := range parentClasses {
if pc == classContentTag {
return true
}
}
}
}
return false
}
rows := scrape.FindAll(contentElmt, rowGrayMatcher)
matchChann := make(chan Match)
for _, rowElmt := range rows {
go func(rowElmt *html.Node) {
var time string
var homeTeam string
var awayTeam string
var score string
timeElmt, timeElmtOK := scrape.Find(rowElmt, scrape.ByClass(classMinElmt))
if timeElmtOK {
time = scrape.Text(timeElmt)
}
scoreElmt, scoreElmtOK := scrape.Find(rowElmt, scrape.ByClass(classScoreLink))
if scoreElmtOK {
score = scrape.Text(scoreElmt)
}
teamElmts := scrape.FindAll(rowElmt, scrape.ByClass(classPlyElmt))
for i := 0; i < len(teamElmts); i++ {
teamElmt := teamElmts[i]
if i%2 == 0 {
homeTeam = scrape.Text(teamElmt)
} else {
awayTeam = scrape.Text(teamElmt)
}
}
match := Match{
HomeTeam: homeTeam,
AwayTeam: awayTeam,
Score: score,
Time: time,
}
matchChann <- match
}(rowElmt)
}
for i := 0; i < len(rows); i++ {
select {
case m := <-matchChann:
matches = append(matches, m)
}
}
close(matchChann)
}
return matches
}
func doScrape(urlString string) AppData {
fmt.Println(urlString)
u, err := url.Parse(urlString)
if err != nil {
panic(err)
}
appData := AppData{}
appData.PackageName = u.Query().Get("id")
resp, err := http.Get(urlString)
if err != nil {
panic(err)
}
root, err := html.Parse(resp.Body)
if err != nil {
panic(err)
}
genreMatcher := func(n *html.Node) bool {
return scrape.Attr(n, "itemprop") == "genre"
}
iconMatcher := func(n *html.Node) bool {
return scrape.Attr(n, "itemprop") == "image"
}
softwareVersionMatcher := func(n *html.Node) bool {
return scrape.Attr(n, "itemprop") == "softwareVersion"
}
name, ok := scrape.Find(root, scrape.ByClass("id-app-title"))
if ok {
appData.Name = scrape.Text(name)
}
genre, ok := scrape.Find(root, genreMatcher)
if ok {
appData.Categories = append(appData.Categories, scrape.Text(genre))
}
icon, ok := scrape.Find(root, iconMatcher)
if ok {
iconSrc := scrape.Attr(icon, "src")
iconUrl, err := url.Parse(iconSrc)
if err != nil {
panic(err)
}
if iconUrl.Scheme == "" {
iconSrc = "https:" + iconSrc
}
resp, err = http.Get(iconSrc)
if err != nil {
panic(err)
}
defer resp.Body.Close()
outputFile, err := os.Create("output/" + appData.PackageName + ".png")
if err != nil {
panic(err)
}
defer outputFile.Close()
_, err = io.Copy(outputFile, resp.Body)
if err != nil {
panic(err)
}
}
version, ok := scrape.Find(root, softwareVersionMatcher)
if ok {
appData.Version = strings.TrimSpace(scrape.Text(version))
}
return appData
}
func (s structure) getSpaces() ([]space, error) {
spaces := []space{
space{Name: "WSU Permit"},
space{Name: "Student OneCard"},
space{Name: "Visitor"},
}
re := map[string]*regexp.Regexp{
"avail": regexp.MustCompile(`([0-9]+|NONE)`),
"status": regexp.MustCompile(`(OPEN|CLOSED|FULL)`),
"updated": regexp.MustCompile(`(?P<a>^.+: )(?P<b>.+)`),
}
// Request
client := &http.Client{
Timeout: time.Second * 10,
}
req, err := http.NewRequest("GET", "http://m.wayne.edu/parking.php?location="+s.URLCode, nil)
if err != nil {
return spaces, errors.New("Request failed")
}
req.Header.Set("User-Agent", "Apple-iPhone6C1/")
// Response
resp, err := client.Do(req)
if err != nil {
return spaces, errors.New("Response failed")
}
defer resp.Body.Close()
body, err := html.Parse(resp.Body)
if err != nil {
return spaces, errors.New("Error parsing response body")
}
// Parse relevant response data
dataString, ok := scrape.Find(body, scrape.ByClass("available"))
if !ok {
return spaces, errors.New("Error: Line 105 - scrape.Find (available) -- not finding scrape info")
}
lastUpdated, ok := scrape.Find(body, scrape.ByClass("last_updated"))
if !ok {
return spaces, errors.New("Error: Line 109 - scrape.Find (last_updated) -- not finding scrape info")
}
avail := re["avail"].FindAllString(scrape.Text(dataString), -1)
if len(avail) == 0 {
avail = []string{"0", "0", "0"}
}
status := re["status"].FindAllString(scrape.Text(dataString), -1)
if len(status) != 3 {
return spaces, errors.New("Error: Line 118 - FindAllString (status) not returning 3 matches")
}
updated := re["updated"].FindStringSubmatch(scrape.Text(lastUpdated))
if len(updated) == 0 {
return spaces, errors.New("Error: Line 122 - FindAllStringSubmatch (updated) not finding a match")
}
for key := range spaces {
spaces[key].Available = avail[key]
spaces[key].Status = status[key]
spaces[key].Updated = updated[2]
}
return spaces, nil
}