我正在尝试开发一个Youtube下载器。我需要视频mp4流网址,我试图使用get_video信息检查我的源代码
WebRequest req = HttpWebRequest.Create("https://www.youtube.com/get_video_info?video_id=" + videoid +"&el=embedded&ps=default&eurl=&gl=US&hl=en");
WebResponse webResp = req.GetResponse();
StreamReader sr = new StreamReader(webResp.GetResponseStream(), System.Text.Encoding.UTF8);
string data = sr.ReadToEnd();
sr.Close();
webResp.Close();
此代码总是只获得一半数据。解码后的数据就像这样
length_seconds=459&sffb=True&no_get_video_log=1&hl=en_US&vmap=<?xml+version="1.0"+encoding="UTF-8"?><vmap:VMAP+xmlns:vmap="http://www.iab.net/videosuite/vmap"+xmlns:yt="http://youtube.com"+version="1.0"><vmap:AdBreak+breakType="linear"+timeOffset="start"><vmap:AdSource+allowMultipleAds+=+"false"><vmap:VASTData><VAST+version="3.0"><Ad><Wrapper><AdSystem+version="1">YT:AdSense</AdSystem><VASTAdTagURI><![CDATA[https://googleads.g.doubleclick.net/pagead/ads?ad_type=text_image&channel=Vertical_1021+Vertical_1036+Vertical_1408+Vertical_211+Vertical_36+Vertical_590+Vertical_613+afv_overlay+afv_user_id_IO0szsIo5AKIFmbbhfxFqw+afv_user_lundgrenrob+invideo_overlay_480x70_cat10+yt_cid_679125+yt_mpvid_xxV6hpjhJlzWVUm7+yt_no_360+yt_no_3pas+yt_no_ap+yt_no_cp+yt_no_wa+ytdevice_1+ytdevicever_1.20170712+ytel_embedded+ytps_default&client=ca-pub-6219811747049371&dbp=ChZoWFduSWZZN2VpcG9CaWVYWnBPSndBEAEgASgA&description_url=http://www.youtube.com/video/rzkoQFbzmOk&eid=148648206&hl=en&host=ca-host-pub-7533488853144487&ht_id=5547539&loeid=9413138,9422596,9431012,9434289,9441394,9444433,9444893,9450707,9451825,9460350,9463578,9465813,9475121,9475579,9476699,9478199,9478523,9479324,9480114,9480538,9481125,9481317,9482504,9482602,9482851,9483147,9483258,9483501&osd=2&pucrd=CgYIABAAGAA&sdki=18803DAD&url=http://www.youtube.com/video/rzkoQFbzmOk&videoad_start_delay=0&v_p=JY0c2kM=&ytdevice=1&ytdevicever=1.20170712&yt_pt=APb3F2_FMmSD8mG8PMmMq7urTSbmCkJ0Bga4WDpKEQV0vAboVlPPijEHbExGYSXuMBmFcOJpCrpa2LhYnrkbgQbnWXXOarZjCKizS68OiIqOlB2GrZui5-ggUQ6aT7w6CaS_ifnYBnZXHpId9iX76vg6ufeyBrm43Pn8XtzfKSqvqvC1W8CRVv5me3zlMAU8-o1WblaDrL0g1b7SL7ot8DDGof6LRYQvNLPRCMZ6cjjIRMd62t7yetC6yMM2gjL_wZnSM_yKWhGZZgCWLQpIGY40tHARFRtOCCQsri5ttw&yt_vis=0]]></VASTAdTagURI><Impression><![CDATA[https://www.youtube.com/api/stats/ads?ver=2&ns=1&event=2&device=1&content_v=rzkoQFbzmOk&el=embedded&ei=om5qWfj6NYL_WNjYpIAD&devicever=1.20170712&asr=CgA&format=[FORMAT_NAMESPACE]_[FORMAT_TYPE]_[FORMAT_SUBTYPE]&break_type=[BREAK_TYPE]&conn=[CONN]&cpn=[CPN]&lact=[LACT]&m_pos=[MIDROLL_POS]&mt=[MT]&p_h=[P_H]&p_w=[P_W]&rwt=[RWT]&sdkv=[SDKV]&slot_pos=[SLOT_POS]&vis=[VIS]&vol=[VOL]&wt=[WT]&ad_cpn=[AD_CPN]&ad_id=[AD_ID]&ad_len=[AD_LEN]&ad_mt=[AD_MT]&ad_sys=[AD_SYS]&ad_v=[AD_V]&aqi=]]></Impression><Error><![CDATA[https://www.youtube.com/api/stats/ads?ver=2&ns=1&event=5&device=1&content_v=rzkoQFbzmOk&el=embedded&ei=om5qWfj6NYL_WNjYpIAD&devicever=1.20170712&format=[FORMAT_NAMESPACE]_[FORMAT_TYPE]_[FORMAT_SUBTYPE]&break_type=[BREAK_TYPE]&conn=[CONN]&cpn=[CPN]&lact=[LACT]&m_pos=[MIDROLL_POS]&mt=[MT]&p_h=[P_H]&p_w=[P_W]&rwt=[RWT]&sdkv=[SDKV]&slot_pos=[SLOT_POS]&vis=[VIS]&vol=[VOL]&wt=[WT]&ad_cpn=[AD_CPN]&ad_id=[AD_ID]&ad_len=[AD_LEN]&ad_mt=[AD_MT]&ad_sys=[AD_SYS]&ad_v=[AD_V]&blocking_error=[BLOCKING_ERROR]&error_msg=[ERROR_MSG]&ima_error=[IMA_ERROR]&internal_id=[INTERNAL_ID]&error_code=[YT_ERROR_CODE]&aqi=]]></Error><Creatives><Creative><NonLinearAds><TrackingEvents><Tracking+event="close"><![CDATA[https://www.youtube.com/api/stats/ads?ver=2&ns=1&event=4&device=1&content_v=rzkoQFbzmOk&el=embedded&ei=om5qWfj6NYL_WNjYpIAD&devicever=1.20170712&format=[FORMAT_NAMESPACE]_[FORMAT_TYPE]_[FORMAT_SUBTYPE]&break_type=[BREAK_TYPE]&conn=[CONN]&cpn=[CPN]&lact=[LACT]&m_pos=[MIDROLL_POS]&mt=[MT]&p_h=[P_H]&p_w=[P_W]&rwt=[RWT]&sdkv=[SDKV]&slot_pos=[SLOT_POS]&vis=[VIS]&vol=[VOL]&wt=[WT]&ad_cpn=[AD_CPN]&ad_id=[AD_ID]&ad_mt=[AD_MT]&ad_sys=[AD_SYS]&ad_v=[AD_V]&i_x=[I_X]&i_y=[I_Y]&aqi=]]></Tracking></TrackingEvents><NonLinear><NonLinearClickTracking><![CDATA[https://www.youtube.com/api/stats/ads?ver=2&ns=1&event=6&device=1&content_v=rzkoQFbzmOk&el=embedded&ei=om5qWfj6NYL_WNjYpIAD&devicever=1.20170712&format=[FORMAT_NAMESPACE]_[FORMAT_TYPE]_[FORMAT_SUBTYPE]&break_type=[BREAK_TYPE]&conn=[CONN]&cpn=[CPN]&lact=[LACT]&m_pos=[MIDROLL_POS]&mt=[MT]&p_h=[P_H]&p_w=[P_W]&rwt=[RWT]&sdkv=[SDKV]&slot_pos=[SLOT_POS]&vis=[VIS]&vol=[VOL]&wt=[WT]&ad_cpn=[AD_CPN]&ad_id=[AD_ID]&ad_len=[AD_LEN]&ad_mt=[AD_MT]&ad_sys=[AD_SYS]&ad_v=[AD_V]&i_x=[I_X]&i_y=[I_Y]&aqi=[AQI]]]></NonLinearClickTracking></NonLinear></NonLinearAds></Creative></Creatives><Extensions><Extension+type="waterfall"+fallback_index="1"/><Extension+type="activeview"><CustomTracking><Tracking+event="viewable_impression"><![CDATA[https://www.youtube.com/api/stats/ads?ver=2&ns=1&event=11&device=1&content_v=rzkoQFbzmOk&el=embedded&ei=om5qWfj6NYL_WNjYpIAD&devicever=1.20170712&format=[FORMAT_NAMESPACE]_[FORMAT_TYPE]_[FORMAT_SUBTYPE]&break_type=[BREAK_TYPE]&conn=[CONN]&cpn=[CPN]&lact=[LACT]&m_pos=[MIDROLL_POS]&mt=[MT]&p_h=[P_H]&p_w=[P_W]&rwt=[RWT]&sdkv=[SDKV]&slot_pos=[SLOT_POS]&vis=[VIS]&vol=[VOL]&wt=[WT]&ad_cpn=[AD_CPN]&ad_id=[AD_ID]&ad_len=[AD_LEN]&ad_mt=[AD_MT]&ad_sys=[AD_SYS]&ad_v=[AD_V]&aqi=]]></Tracking></CustomTracking></Extension></Extensions></Wrapper></Ad></VAST></vmap:VASTData></vmap:AdSource><vmap:TrackingEvents><vmap:Tracking+event="error"><![CDATA[https://www.youtube.com/api/stats/ads?ver=2&ns=1&event=1&device=1&content_v=rzkoQFbzmOk&el=embedded&ei=om5qWfj6NYL_WNjYpIAD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B6D35B87F6
你看到它不是我需要的全部数据来自get_video_info。它只是它的一部分。我怎么能解决这个问题?
答案 0 :(得分:0)
使用HttpClient
它比HttpWebRequest
using (var client = new HttpClient()) {
var response = await client.GetAsync(url);
string content = await response.Content.ReadAsStringAsync();
}
HttpClient
是两个世界中最好的(即WebClient
和HttpWebRequest
)