HTTP 400 Error (Bad Request – Request Too Long) Issue in Captivate Lessons We have found a bug in Adobe Captivate on lessons that have 40+ slides in them. Once the user has viewed around 40 slides or so, they begin to get HTTP 400 Error (Bad Request – Request Too Long) errors on slides when video, audio or web-objects are being loaded. This error has been reproduced in Safari on a Mac, in Safari on an iPad Pro and in Chrome on an iPad Pro. This error is usually caused by corrupt cookies. In our tests, if we experience this issue we can exit the course, clear the site’s cookies and re-enter the lesson and everything will be working again, until we view another 40 slides or so. These 40 slides can be previously viewed slides or newly viewed slides. Looking further into the cookies, here is the data from document.cookie in the desktop version of Chrome, which is not affected by this issue: 18467/1/0,2,3,4,5,6,7,8,9,10,12,13,14,15,16,17,18,19,20,22,23,24,25,26,27,28,29,30,31,33,34,35,36,37,38,39,40,41,42,43,45,46,47,48,/0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,55,56,//48 When I viewed the cookie data on Safari, here is what I see: 18467/1/0,2,3,4,5,6,7,8,9,10,12,13,14,15,16,17,18,19,20,22,23,24,25,26,27,28,29,30,31,33,34,38,39,40,41,42,43,44,45,46,/0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,33,34,35,36,37,38,39,40,41,42,43,44,45,46,50,51,52,54,55,//33=; 18467/1/0,2,3,4,5,6,7,8,9,10,12,13,14,15,16,17,18,19,20,22,23,24,25,26,27,28,29,30,31,34,38,39,40,41,42,43,44,45,46,/0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,33,34,35,36,37,38,39,40,41,42,43,44,45,46,50,51,52,54,55,//31=; 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18467/1//0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,33,34,35,36,37,38,39,40,41,42,43,44,45,46,50,51,52,54,55,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25,26,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25,26,27,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25,26,27,28,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25,26,27,28,29,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25,26,27,28,29,30,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25,26,27,28,29,30,31,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,12,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,12,13,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,12,13,14,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,12,13,14,15,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,12,13,14,15,16,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,12,13,14,15,16,17,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,12,13,14,15,16,17,18,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,12,13,14,15,16,17,18,19,//-1=; 18467/1//0,1,2,3,4,5,6,7,8,9,10,12,13,14,15,16,17,18,19,20,//-1=; 18467/1//0,2,//-1=; 18467/1//0,2,3,//-1=; 18467/1//0,2,3,4,//-1=; 18467/1//0,2,3,4,5,//-1=; 18467/1//0,2,3,4,5,6,//-1=; 18467/1//0,2,3,4,5,6,7,//-1=; 18467/1//0,2,3,4,5,6,7,8,//-1=; 18467/1//0,2,3,4,5,6,7,8,9,//-1=; Looking closer at the data, it is apparent that the captivate lesson, when saving data to document.cookie is NOT sending the data as a name/value pair. The desktop version of Chrome will save the data in the value half of the name/value pair and leave the name half empty. In Safari desktop and on the iPad browsers, they treat the data coming in as the name half of the name/value pair (see screen shot below). So every time the Captivate lesson sends data to document.cookie, these browsers are saving the data as a new cookie. Hence the large amount of duplicated data seen above. And this is what is causing the 400 error. I've submitted a bug report. Anyone else seen this?
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