Access-control-allow-origin

When use Vastinspector to check our vast response, it tiped:

"No ' access-control-allow-origin ' header is present on the requested resource. Origin ' https://imasdk.googleapis.com ' is therefore don't allow access "on the console,

So we had to solve it, to make sure our video play smoothly.

According the docs:

access-control -allow-origin: <origin header value> access-control-allow-credentials:  
 We add headers before response: 
           

Origin: = R.header.get ("origin") W.header (). Set ("access-control-allow-origin", Origin) W.header (). Set ("access-control-allow-credentials""true" )

Then our vast can play.

andskipable vast like this：

<VASTversion= "2.0">    <AdID= "159033832">        <InLine>            <Adsystem>DoubleClick</Adsystem>            <Impression><! [Cdata[https://test.adomain.com/impression?k=598cf38025536d7377e2bcbb&p= njayohwyodawmhwwfdiyfde1otazmzgzmnw3mdqzmduwnzn8bm9ybwfsfgrvdwjszwnsawnrfdeymdb4nji3fdh8yw5kcm9pzhw2ljaumhx8c20tzzyxmg18f Hxvu3x8fhxub3jtywx8fgnvbs5wb3dlcmquy2xlyw5lcnx8fhx8fhx8ntk4y2yzodayntuznmq3mzc3ztjiy2jifduyljizljexmi4wfhx8fhx8mhwwfde4ow Mzytq3ltvimwmtndiwzi1hnzzlltgxzwnhmdi1ytmxzhx8fhnhbxn1bmd8fhxyyw5rx2nwbv9jyw1wfhwzfhx8lhrilgrilhjlfhsiy2fycmllcii6ijcwmte 5iiwiy2l0esi6imfzagj1cm4ilcjjdhiioiiwlja1iiwiy3r5cguioijjcg0ilcjwyxjzzsi6ijeilcjyyw5rijoimcisinjlcxr5cguioij2bmeilcjzzwfy y2gioiixiiwidhjhzmzpy190exblijoiyxbwin18mtuwmjqwotywmhx8mxwxmtkxnxx8fhx8fgh0dhbzoi8vcgxhes5nb29nbguuy29t]]></Impression>            <Creatives>                <CreativeID= "704305157">                    <LinearSkipoffset= "00:00:05">                        <Duration>00:00:23</Duration>                        <trackingevents>                            <TrackingEvent= "Start"><! [Cdata[https://analytics-test.adomain.com/collect?app_id=com.powerd.cleaner&advertiser_id=22&campaign_id ]]></Tracking>                            <TrackingEvent= "Midpoint"><! [Cdata[https://analytics-test.adomain.com/collect?app_id=com.powerd.cleaner&advertiser_id=22&campaign_id=                             <TrackingEvent= "complete"><! [Cdata[https://analytics-test.adomain.com/collect?app_id=com.powerd.cleaner&advertiser_id=22&campaign_id =                        <Videoclicks>                            <ClickThrough><! [Cdata[https://test.adomain.com/click?k=598cf38025536d7377e2bcbb&p=]]></ClickThrough>                            <clicktracking/>                        </Videoclicks>                        <Mediafiles>                            <MediaFileID= "1"Delivery= "Progressive"type= "Video/mp4"bitrate= "All"width= "The "Height= "720"><! [Cdata[Https://d3e8xvf8dyclkj.cloudfront.net/cdn-adn/17/08/04/13/42/5984094d8709d.mp4]]></MediaFile>                        </Mediafiles>                    </Linear>                </Creative>            </Creatives>            <Extensions>                <Extension>                    <customtracking>                        <TrackingEvent= "Skip"><! [Cdata[https://test.xxx.com/impression?k=11&p=200]]></Tracking>                    </customtracking>                </Extension>            </Extensions>        </InLine>    </Ad></VAST>

Access-control-allow-origin