func TorrentList(url string) ([]Torrent, error) {
// request and parse the front page
resp, err := http.Get(url)
if err != nil {
return make([]Torrent, 0), err
}
root, err := html.Parse(resp.Body)
if err != nil {
return make([]Torrent, 0), err
}
var torrents []Torrent
if content, ok := scrape.Find(root, scrape.ById("searchResult")); ok {
// define a matcher
matcher := func(n *html.Node) bool {
// must check for nil values
if n.DataAtom == atom.Tr && n.Parent.DataAtom == atom.Tbody {
return true
}
return false
}
// grab all articles and print them
trs := scrape.FindAll(content, matcher)
for _, tr := range trs {
torrents = append(torrents, ParseRecord(tr))
}
}
resp.Body.Close()
return torrents, nil
}
// Auth attempts to access a given URL, then enters the given
// credentials when the URL redirects to a login page.
func (s *Session) Auth(serviceURL, email, password string) error {
resp, err := s.Get(serviceURL)
if err != nil {
return err
}
defer resp.Body.Close()
parsed, err := html.ParseFragment(resp.Body, nil)
if err != nil || len(parsed) == 0 {
return err
}
root := parsed[0]
form, ok := scrape.Find(root, scrape.ById("gaia_loginform"))
if !ok {
return errors.New("failed to process login page")
}
submission := url.Values{}
for _, input := range scrape.FindAll(form, scrape.ByTag(atom.Input)) {
submission.Add(getAttribute(input, "name"), getAttribute(input, "value"))
}
submission["Email"] = []string{email}
submission["Passwd"] = []string{password}
postResp, err := s.PostForm(resp.Request.URL.String(), submission)
if err != nil {
return err
}
postResp.Body.Close()
if postResp.Request.Method == "POST" {
return errors.New("login incorrect")
}
return nil
}
func indexPage(page string) (ind map[string]int, branches []string, err error) {
resp, err := http.Get(page)
if err != nil {
return
}
root, err := html.Parse(resp.Body)
resp.Body.Close()
if err != nil {
return
}
content, ok := scrape.Find(root, scrape.ById("bodyContent"))
if !ok {
return nil, nil, errors.New("no bodyContent element")
}
paragraphs := scrape.FindAll(content, scrape.ByTag(atom.P))
pageText := ""
for _, p := range paragraphs {
pageText += elementInnerText(p) + " "
}
words := strings.Fields(strings.ToLower(pageText))
ind = map[string]int{}
for _, word := range words {
ind[word] = ind[word] + 1
}
links := findWikiLinks(content)
branches = make([]string, len(links))
for i, link := range links {
branches[i] = "https://en.wikipedia.org" + link
}
return
}
// 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 scraper() {
fd, err := os.Open("/mnt/hgfs/Downloads/wiki.html")
if err != nil {
panic(err)
}
defer fd.Close()
root, err := html.Parse(fd)
if err != nil {
panic(err)
}
t := html.NewTokenizer(root)
// matcher := func(n *html.Node) bool {
// if n.DataAtom == atom.Table {
// return true
// }
// return false
// }
// rowMatcher := func(n *html.Node) bool {
// if n.DataAtom == atom.Tr {
// return true
// }
// return false
// }
tableMatcher := scrape.ById(tableID)
table := scrape.FindAll(root, tableMatcher)
for _, v := range table {
if t.Token().Data == "tr" {
fmt.Printf("%s\n", scrape.Text(v))
} else {
t.Next()
}
}
// for , v := range table {
// 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")
}
// parseExtraComponentInfo parses the "Class Detail" page for a component.
func parseExtraComponentInfo(body io.Reader, component *Component) (courseOpen bool, err error) {
nodes, err := html.ParseFragment(body, nil)
if err != nil {
return
}
if len(nodes) != 1 {
return false, errors.New("invalid number of root elements")
}
openStatus, ok := scrape.Find(nodes[0], scrape.ById("SSR_CLS_DTL_WRK_SSR_DESCRSHORT"))
if !ok {
return false, errors.New("open status not found")
}
courseOpen = (nodeInnerText(openStatus) == "Open")
availTable, ok := scrape.Find(nodes[0], scrape.ById("ACE_SSR_CLS_DTL_WRK_GROUP3"))
if !ok {
return courseOpen, errors.New("could not find availability info")
}
rows := scrape.FindAll(availTable, scrape.ByTag(atom.Tr))
if len(rows) != 7 {
return courseOpen, errors.New("invalid number of rows in availability table")
}
var availability ClassAvailability
cols := nodesWithAlignAttribute(scrape.FindAll(rows[2], scrape.ByTag(atom.Td)))
if len(cols) != 2 {
return courseOpen, errors.New("expected 2 aligned columns in row 2")
}
availability.Capacity, err = strconv.Atoi(strings.TrimSpace(nodeInnerText(cols[0])))
if err != nil {
return
}
availability.WaitListCapacity, err = strconv.Atoi(strings.TrimSpace(nodeInnerText(cols[1])))
if err != nil {
return
}
cols = nodesWithAlignAttribute(scrape.FindAll(rows[4], scrape.ByTag(atom.Td)))
if len(cols) != 2 {
return courseOpen, errors.New("expected 2 aligned columns in row 4")
}
availability.EnrollmentTotal, err = strconv.Atoi(strings.TrimSpace(nodeInnerText(cols[0])))
if err != nil {
return
}
availability.WaitListTotal, err = strconv.Atoi(strings.TrimSpace(nodeInnerText(cols[1])))
if err != nil {
return
}
cols = nodesWithAlignAttribute(scrape.FindAll(rows[6], scrape.ByTag(atom.Td)))
if len(cols) != 1 {
return courseOpen, errors.New("expected 1 aligned column in row 6")
}
availability.AvailableSeats, err = strconv.Atoi(strings.TrimSpace(nodeInnerText(cols[0])))
if err != nil {
return
}
component.ClassAvailability = &availability
return
}
