/
youtube.go
155 lines (133 loc) · 3.38 KB
/
youtube.go
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package controllers
import (
"errors"
"fmt"
"io/ioutil"
"net/url"
"strings"
"github.com/LyricTian/snail/utils/captcha"
"github.com/astaxie/beego"
)
// YoutubeController youtube视频下载控制器
type YoutubeController struct {
DownloadController
}
// Post /youtube
// @router /download/youtube [post]
func (yc *YoutubeController) Post() {
var reqData struct {
YFileLink string `valid:"Required"`
YCaptchaID string `valid:"Required"`
YCaptcha string `valid:"Required"`
}
if err := yc.BindVForm(&reqData); err != nil {
yc.Error400(err.Error())
}
if !captcha.VerifyString(reqData.YCaptchaID, reqData.YCaptcha) {
yc.Error400("无效的验证码")
}
videoID, err := yc.getVideoID(reqData.YFileLink)
if err != nil || videoID == "" {
if err != nil {
beego.Warn("解析下载链接发生错误:", err.Error())
}
yc.Error400("无效的下载链接")
}
vis, err := yc.parseVideoInfo(videoID)
if err != nil {
beego.Warn("获取视频信息发生错误:", err.Error())
yc.Error400("请求视频信息发生错误")
}
var cvi *YVideoInfo
for _, vi := range vis {
if strings.HasPrefix(vi.Type, "video/mp4") {
cvi = vi
break
}
}
if cvi == nil {
yc.Error400("未找到有效的视频信息")
}
vu, err := url.ParseRequestURI(cvi.URL)
if err != nil {
beego.Warn("解析视频下载链接发生错误:", err.Error())
yc.Error400("解析视频下载链接发生错误")
}
resp, err := yc.DoRequest(vu)
if err != nil {
beego.Warn("请求视频下载发生错误:", err.Error())
yc.Error400("请求视频下载发生错误")
}
fileSize := resp.ContentLength
fileName := fmt.Sprintf("%s.mp4", cvi.Title)
fileSizeLimit := beego.AppConfig.DefaultInt64("YoutubeLimit", 512) * 1024 * 1024
// 增加文件下载历史
yc.AddHistory(1, int(fileSize), fileName, reqData.YFileLink)
if fileSize > 0 {
if fileSize > fileSizeLimit {
yc.Error400("视频文件大小超出限制")
}
}
yc.DoResponse(fileName, fileSizeLimit, resp, nil)
}
// 解析视频信息
func (yc *YoutubeController) parseVideoInfo(videoID string) (videoInfos []*YVideoInfo, err error) {
rawurl := fmt.Sprintf("http://www.youtube.com/get_video_info?video_id=%s", videoID)
u, err := url.ParseRequestURI(rawurl)
if err != nil {
return
}
resp, err := yc.DoRequest(u)
if err != nil {
return
}
defer resp.Body.Close()
buf, err := ioutil.ReadAll(resp.Body)
if err != nil {
return
}
uvs, err := url.ParseQuery(string(buf))
if err != nil {
return
}
if uvs.Get("status") == "fail" {
err = errors.New(uvs.Get("reason"))
return
}
streams := strings.Split(uvs.Get("url_encoded_fmt_stream_map"), ",")
for _, stream := range streams {
suvs, verr := url.ParseQuery(stream)
if verr != nil {
err = verr
return
}
videoInfo := &YVideoInfo{
Title: uvs.Get("title"),
Author: uvs.Get("author"),
URL: suvs.Get("url"),
Quality: suvs.Get("quality"),
Type: suvs.Get("type"),
}
videoInfos = append(videoInfos, videoInfo)
}
return
}
// 获取视频ID
func (yc *YoutubeController) getVideoID(fileLink string) (videoID string, err error) {
u, err := url.ParseRequestURI(fileLink)
if err != nil {
return
} else if !strings.Contains(u.Host, "youtube.com") {
return
}
videoID = u.Query().Get("v")
return
}
// YVideoInfo youtube视频信息
type YVideoInfo struct {
Title string
Author string
URL string
Quality string
Type string
}