[bshi02]

I had used packet sniffer s/w during I listen to Online streamming lesson which My elder sister purchased, and get below URL logs and I tried to download mp4 file from below url logs ,but It won't download(404 forbidden error) with tools I know.


http://61.110.247.86/redirect/edump4.eduwill.net/eduwillhttp/high_vod/2013/Gov9/EN/L/G2L13EN01H001.mp4?px-bps=1865712&px-bufahead=10
http://61.110.247.86/redirect/edump4.eduwill.net/eduwillhttp/high_vod/2013/Gov9/EN/L/G2L13EN01H001.mp4
http://edump4.eduwill.net/eduwillhttp/high_vod/2013/Gov9/EN/L/G2L13EN01H001.mp4
http://edump4.eduwill.net/auth/getsid?key=MzExMjMyMTgwMzgxOTIxNzM1MzE3NTIzODAxOGV kdW1wNC5lZHV3aWxsLm5ldDA1NC9lZHV3aWxsaHR0cC9oaWdoX 3ZvZC8yMDEzL0dvdjkvRU4vTC9HMkwxM0VOMDFIMDAxLm1wNDI 1NzI0OTAxMDExMDEyMTE5MzMyMTUxMmVkdXdpMDAwMDAwMDMwM DA2NDc0MQ==&path=/eduwillhttp/high_vod/2013/Gov9/EN/L/G2L13EN01H001.mp4
http://edump4.eduwill.net/auth/delsid
http://edump4.eduwill.net/eduwillhttp/high_vod/ETC/Title/2013/Gov9/L/2-GEN-L.wmv?px-bps=1035732&px-bufahead=40
http://edump4.eduwill.net/eduwillhttp/high_vod/ETC/Title/2013/Gov9/L/2-GEN-L.wmv
http://edump4.eduwill.net/auth/getsid?key=MzExMjMyMTgwMzgxOTIxNzI5MzE3NTIzODAxOGV kdW1wNC5lZHV3aWxsLm5ldDA1NS9lZHV3aWxsaHR0cC9oaWdoX 3ZvZC9FVEMvVGl0bGUvMjAxMy9Hb3Y5L0wvMi1HRU4tTC53bXY yNTcyNDkwMTAxMTAxMjExOTMzMjE1MTJlZHV3aTAwMDAwMDAzM DAwMDE2MDY=&path=/eduwillhttp/high_vod/ETC/Title/2013/Gov9/L/2-GEN-L.wmv
http://contents.e-campus.co.kr/vmc/setCookieRedirect.html?pname0=my_score&pval0=87.5&pname1=myprog&pval1=87.5&pname2=classprog&pval2=43.67&pname3=study&pval3=YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY YYYYNNNYNNNYYYNNYYYY&pname4=minStudyTime&pval4=&pname5=totalStudyTime&pval5=&totalsize=6&nextURL=
http://contents.e-campus.co.kr/vmc/146952/lecture.htm




Request header
GET /redirect/edump4.eduwill.net/eduwillhttp/high_vod/2013/Gov9/EN/L/G2L13EN01H001.mp4?px-bps=1865712&px-bufahead=10 HTTP/1.1
Accept: */*
Cookie: sid=fcf3b02493bb6a4bb66044cdf013f920;tid=02da867f4 4f9d269;range=135182-455419997;cachecontrol=ignore-nocache
Range: bytes=135182-455419997
Host: 61.110.247.86
X-Auth-Hash: 0

GET /eduwillhttp/high_vod/2013/Gov9/EN/L/G2L13EN01H001.mp4 HTTP/1.1
Accept: */*
Cookie: sid=fcf3b02493bb6a4bb66044cdf013f920;tid=f15425186 f6228ba;range=0-135181;cachecontrol=ignore-nocache
Range: bytes=0-135181
Host: edump4.eduwill.net
X-Auth-Hash: 0

GET /eduwillhttp/high_vod/ETC/Title/2013/Gov9/L/2-GEN-L.wmv?px-bps=1035732&px-bufahead=40 HTTP/1.1
Accept: */*
Cookie: sid=9fc1b718ffc75edac68d2200df7474c4;tid=1b1c13b20 acae275;range=9582-521597;cachecontrol=ignore-nocache
Range: bytes=9582-521597
Host: edump4.eduwill.net
X-Auth-Hash: 3

response header

HTTP/1.1 206 Partial Content
Date: Sun, 10 Feb 2013 07:43:34 GMT
Server: PWS/8.0.9.8
X-Px: ht h0-s225.p51-icn.cdngp.net
ETag: "-8296227275438437287"
Cache-Control: max-age=780
Expires: Sun, 10 Feb 2013 07:55:14 GMT
Age: 80
Accept-Ranges: bytes
Content-Length: 512016
Content-Type: video/x-ms-wmv
Last-Modified: Fri, 06 Jul 2012 11:32:09 GMT
Content-Range: bytes 9582-521597/522958
Connection: keep-alive

THere is no response header
http://edump4.eduwill.net/eduwillhttp/high_vod/2013/Gov9/EN/L/G2L13EN01H001.mp4



Cookie
sid=fcf3b02493bb6a4bb66044cdf013f920;tid=02da867f4 4f9d269;range=135182-455419997;cachecontrol=ignore-nocache

sid=9fc1b718ffc75edac68d2200df7474c4;tid=1b1c13b20 acae275;range=9582-521597;cachecontrol=ignore-nocache


With packet sniffer s/w, I just have noticed that Before accessing wmv or mp4 files there is always URL of "blablahblah../auth/getsid?key=...blah.blah.." parameter.
what is getsid and delsid parameter? Is it request an authentication key from the server and That prevent me from getting mp4 download? And is there any ways to find sid value and make use of that sid value or bypass sid check process for downloading?
I'm sorry for my wierd English and any help would be appreciated.

[bshi02]

[EDIT]I found out by the googling that Media streaming player(aqua player) which is a compulsory Media player to listen these online lesson has the protection of DRM based .
and there is developer's Homepage. In there Homepage,this Link (http://api.viglink.com/api/click?format=go&key=f68eee63dc9f8d5a3ebd87795dfde534&loc=http%3A%2F%2Fstream-recorder.com%2Fforum%2Fcan-bypass-remove-sid-t15280.html&v=1&libid=1360546585434&out=http%3A%2F%2Fwww.worldlingo.com%2FSYls3jUpdI3I Rq6QLfG86G%2CAeqUamF5vgsZbrxpDzkcM-%2Ftranslation%3Fwl_url%3Dhttp%253A%252F%252Fwww.c dnetworks.co.kr%252FSE%252FAP%252FaquaAuth.jsp%26w l_srclang%3DKO%26wl_trglang%3DEN&ref=http%3A%2F%2Fstream-recorder.com%2Fforum%2Fsearch.php%3Fsearchid%3D817 82&title=How%20can%20I%20bypass%20or%20remove%20sid%3 F%20-%20Audio%2Fvideo%20stream%20recording%20forums&txt=this%20Link&jsonp=vglnk_jsonp_13605467003864) said that They have adopted one-time authentication key system to block duplication log-in or ID or IP and use specialized certification method to block Illegal streaming URL access from their server.
In the final,I think If there is a tool which is able to save auth information from server and use it to cheat on their server,It would be possible to download mp4 files.

[chap]

put link video

[Stream Ripper]

Let's have the link to the video, please.

[bshi02]

I just have sent a message about this matter(account information for geting access to this streamming URL.)