Debug Vast advertising tags in JWplayer 7+

Question

Apparently because I am new here I cannot even post sufficent links to explain my problem fully. FYI

Source

mp4stream.com / preroll / videe /

This is one of many demos I have setup for various Ad Networks. Almost all have the same result.

Part One

A lot of the Ad Networks I demo all have the same issue that looks something like this. I'm talking at least 10 partners I've tested have. Below is an example of one.

XMLHttpRequest cannot load http://vast.videe.tv/vast-proxy/?VPAID=1&aid=12988&sid=0&channel_id=0&conte…player_width=657&player_height=370&vid_duration=1440&cb=685997865628451100. A wildcard '' cannot be used in the 'Access-Control-Allow-Origin' header when the credentials flag is true. Origin 'http://mp4stream.com' is therefore not allowed access.*

These failures create a huge increase load time and affects the entire player / user experience as a whole.

One Ad Network today indicated that I may be passing cookies to them and that is why the above is failing. But I have a hard time believing that based on my development / server experience. As far as I'm aware every single player JWplayer or otherwise would use cookies of some kind.

So the question I have is why do hundreds of these simply fail?

Answer 1

Based on that error you are seeing, vast.videe.tv is blocking mp4stream.com from making requests. You will need to contact videe.tv to determine why this is happening.

Here's a specific support document we have for this: http://support.jwplayer.com/customer/portal/articles/1403679-crossdomain-file-loading

We love StackOverflow, but we don't check here often. The best way to get support for JW Player is to go to http://jwplayer.com/support/

Answer 2

to be servable in a JavaScript environment a VAST ad server’s response must include the following HTTP CORS headers:

Access-Control-Allow-Origin:
Access-Control-Allow-Credentials: true

This HTTP header allows an ads player on any origin to read the VAST response from the ad server origin. The value of Access-Control-Allow-Origin: should be the value of the Origin header sent with the ad request. The Access-Control-Allow-Credentials: header will ensure that cookies will be sent and received properly.

Hope this helps...