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objective-ccocoavideonsdatansurl

How to check if NSData has a multimedia content?

I have a NSData object, obtained from a URL request.Now I don't know how to read it.
However in my application I don't know if the data contains a video or not, so I would know:

  1. How to know if NSData has some video inside it?
  2. How to interpret the data, reading it byte per byte?
Solution

  • I'm not familiar with the particular API you're using so I can't say what the code should be, but any web/HTTP client library should provide you the Content-Type of the data as well as the data itself. Use the Content-Type (and only the Content-Type; doing otherwise can lead to security bugs) to determine how to interpret the content. For example, if the Content-Type (also known as MIME type) starts with video/, then the content is definitely video; the part after the slash will tell you the specific format to interpret it as.