Using Amazon S3 signed URLs

Hello Martin,

After a bit of trial and error, I was able to isolate the problem to the flashvars parameter which is passed to flowplayer.swf. If there is a + in the Signature portion of the video url (encoded as %2B by either fvplayer or s3mv plugins), the video fails to load. The reason I believe this is happening is that the %2B is decoded back to a + before the media is requested from S3, which then decodes the + as a space, causing the request to fail. If the + remains encoded as %2B in the request to S3, the video loads fine.

I first attempted to resolve this by double-encoding that parameter (effectively encoding the % before the 2B), with the + now encoded as %252B in the page source. This also failed. Using Chrome dev tools, I could see that the url requested from S3 still had the + instead of %2B. I’m assuming that the flash player is decoding the url multiple times before finally requesting the file from S3. The solution that worked was to have the + encoded as %25252B. When encoded as such, the request to S3 now has a %2B instead of a + in the url.

I wrote a very simple plugin (attached to a private email) that overrides the [fvplayer] shortcode and does a quick regex search/replace on the S3 url portion of the output. I’m fairly new to PHP and WordPress, so there may be a better approach, but this seems to be working quite well for us at the moment.

I hope this helps!

– Jeremy

Hi Jason and Jeremy,

thank to both of you for your input.

Today we worked on adding the Amazon S3 protection support straight in to our plugin but I was not able to replicate your bug yet.

But I’ll have one more look at Jeremy’s code to figure out what could it be that it’s breaking for you.

Thanks,
Martin

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Hello Jason and Jeremy,

I forgot to add – you really should be using our fix and remove the Jeremy’s hot-fix. Otherwise the Amazon S3 signed URLs won’t work in HTML5 player.

Thanks,
Martin

Hello Jason,

we are sorry about the inconvenience, however –

I refreshed the page many times and the video always played for me (in HTML5 in Safari and Flash in Firefox and IE 10 and also on iPad).

I was checking the source code and could see how the fix for %2B works for Flash and not for HTML5, as it’s supposed to. The secured video URL is also visible above the “Benefits of Membership” heading, looks like you left it there for debugging.

Please let us know if there was some issue which you had to figure out (perhaps to make it works with your Amazon S3 plugin) or if you are still having the issue and in which browser.

Thanks,
Martin

Hello Jason,

Chrome 21.0.1180.90 on Mac OS X 10.5.8 fails for me sometimes. I mean when I reload it plays, but sometimes it won’t. Same for Chrome 28.0.1500.72 m on Windows 8.

It happens even with URLs without %2B in them.

Please try to disable the autobuffering, we had these Chrome issues with some MOV files an disabling autobuffering seemed to help: http://foliovision.com/support/fv-wordpress-flowplayer/troubleshooting/mov-videos#post-1906

Please let us know, we should disable autobuffering for Chrome when using both MP4 and MOV if it helps.

Thanks,
Martin

Hello Jason,

thank you for the kind words!

We will update this thread when our own code to deal with secure Amazon URLs is ready, so you can give it a try.

We will probably disable autobuffer for Chrome for these secure Amazon URLs. And also MOV files as it was causing issues in other thread (.mov videos?).

Thanks,
Martin

Hello Jason,

version 2.1.34 with this fix and couple of others was released.

Thanks,
Martin

Hello Jason,

thanks! That’s what we wanted – an intelligent error message if the video has expired.

Martin