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fetchInfo.go
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fetchInfo.go
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package youtube
import (
"context"
"errors"
"fmt"
"github.com/Jeffail/gabs/v2"
"github.com/Sora233/DDBOT/proxy_pool"
"github.com/Sora233/DDBOT/proxy_pool/requests"
"github.com/Sora233/DDBOT/utils"
"regexp"
"strconv"
"strings"
"time"
)
const VideoPath = "https://www.youtube.com/channel/%s/videos?view=57&flow=grid"
type Searcher struct {
Sub []*gabs.Container
}
func (r *Searcher) search(key string, j *gabs.Container) {
// TODO gabs: bad performance
if len(j.ChildrenMap()) != 0 {
for k, v := range j.ChildrenMap() {
if k == key {
r.Sub = append(r.Sub, v)
continue
}
r.search(key, v)
}
} else {
for _, c := range j.Children() {
if len(c.ChildrenMap()) != 0 {
r.search(key, c)
}
}
}
}
// very sb
func XFetchInfo(channelID string) ([]*VideoInfo, error) {
log := logger.WithField("channel_id", channelID)
ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
defer cancel()
st := time.Now()
defer func() {
ed := time.Now()
log.WithField("FuncName", utils.FuncName()).Tracef("cost %v", ed.Sub(st))
}()
var channelName string
path := fmt.Sprintf(VideoPath, channelID)
resp, err := requests.Get(ctx, path, nil, 3,
requests.HeaderOption("accept-language", "zh-CN"),
requests.AddUAOption(),
requests.ProxyOption(proxy_pool.PreferOversea),
)
if err != nil {
return nil, err
}
content, err := resp.Content()
if err != nil {
return nil, err
}
var reg *regexp.Regexp
if strings.Contains(string(content), `window["ytInitialData"]`) {
reg = regexp.MustCompile("window\\[\"ytInitialData\"\\] = (?P<json>.*);")
} else {
reg = regexp.MustCompile(">var ytInitialData = (?P<json>.*?);</script>")
}
result := reg.FindSubmatch(content)
if len(result) <= reg.SubexpIndex("json") {
return nil, errors.New("no json data matched")
}
root, err := gabs.ParseJSON(result[reg.SubexpIndex("json")])
if err != nil {
return nil, err
}
var videoSearcher = new(Searcher)
var infoSearcher = new(Searcher)
videoSearcher.search("gridVideoRenderer", root)
videoSearcher.search("videoRenderer", root)
infoSearcher.search("channelMetadataRenderer", root)
reg = regexp.MustCompile(`\\u[0-9]{4}`)
if len(infoSearcher.Sub) >= 1 {
channelName = infoSearcher.Sub[0].S("title").String()
allCode := reg.FindAllString(channelName, -1)
for _, code := range allCode {
unquote, err := utils.UnquoteString(code)
if err != nil {
log.WithField("quote_string", code).Errorf("unquote failed %v, err", err)
continue
}
channelName = strings.ReplaceAll(channelName, code, unquote)
}
} else {
channelName = "<nil>"
}
channelName = strings.Trim(channelName, `"`)
var idSet = make(map[string]bool)
var videoInfos []*VideoInfo
for _, videoJson := range videoSearcher.Sub {
var i = new(VideoInfo)
i.VideoId = strings.Trim(videoJson.S("videoId").String(), `"`)
if _, found := idSet[i.VideoId]; !found {
idSet[i.VideoId] = true
} else {
continue
}
if videoJson.ExistsP("title.simpleText") {
i.VideoTitle = strings.Trim(videoJson.Path("title.simpleText").String(), `"`)
} else if videoJson.ExistsP("title.runs") {
sb := strings.Builder{}
for _, c := range videoJson.Path("title.runs").Children() {
sb.WriteString(strings.Trim(c.S("text").String(), `"`))
}
i.VideoTitle = sb.String()
}
switch strings.Trim(videoJson.S("thumbnailOverlays", "0",
"thumbnailOverlayTimeStatusRenderer", "text",
"accessibility", "accessibilityData", "label").String(), `"`) {
case "PREMIERE", "首播", "プレミア":
i.VideoType = VideoType_FirstLive
case "LIVE", "直播", "ライブ":
i.VideoType = VideoType_Live
case "null":
log.Error("null video type")
continue
default:
i.VideoType = VideoType_Video
}
switch strings.Trim(videoJson.S("thumbnailOverlays", "0", "thumbnailOverlayTimeStatusRenderer", "style").String(), `"`) {
case "UPCOMING":
i.VideoStatus = VideoStatus_Waiting
i.VideoTimestamp, _ = strconv.ParseInt(strings.Trim(videoJson.Path("upcomingEventData.startTime").String(), `"`), 10, 64)
case "LIVE":
i.VideoStatus = VideoStatus_Living
case "null":
log.Error("null video status")
continue
default:
i.VideoStatus = VideoStatus_Upload
}
i.ChannelId = channelID
i.ChannelName = channelName
var size int64 = -1
for _, obj := range videoJson.S("thumbnail", "thumbnails").Children() {
if obj.Exists("height") {
height, err := strconv.ParseInt(obj.S("height").String(), 10, 64)
if err != nil {
continue
}
if size < height {
size = height
i.Cover = strings.Trim(obj.S("url").String(), `"`)
}
}
}
videoInfos = append(videoInfos, i)
}
log.WithField("video_count", len(videoInfos)).Tracef("fetch info")
return videoInfos, nil
}