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    <p><strong>short answer: yes</strong> if they are ID3v2 tags</p> <p><strong>which ID3 Tag version are you trying to read?</strong></p> <p><strong>ID3v1 tags</strong> are at the end of a file, in the last 128 bytes. With Net::HTTP it doesn't seem to be possible to seek forward towards the end of the file and read only the last N bytes. If you try that, using headers = {"Range" => "bytes=128-"} , it always seems to download the complete file. resp.body.size => file-size . But no big loss, because ID3 version 1 is pretty much outdated at this point because of it's limitations, such as fixed length format, only ASCII text, ...). iTunes uses ID3 version 2.2.0.</p> <p><strong>ID3v2 tags</strong> are at the beginning of a file - to support streaming - you can download the initial part of the MP3 file, which contains the ID3v2 header, via HTTP protocol >= 1.1</p> <p>I answered pretty much the same question before, which was specifically for a Ruby implementation.</p> <p><strong>Please check this Question:</strong> <a href="https://stackoverflow.com/questions/7656950/read-id3-tags-of-remote-mp3-file-in-ruby-rails">Read ID3 Tags of Remote MP3 File in Ruby/Rails?</a></p> <hr> <p><strong>Continued..</strong> The Ruby code in the other question I mentioned is a fully functioning example.</p> <p>You can set a pre-determined size of bytes you want to fetch which is large enough that you assume it contains the complete ID3-tag, e.g. 1000 bytes</p> <p>You then open an HTTP connection using your favourite HTTP library for whatever language you use, but make sure that the version of the HTTP-protocol is >= 1.1 , and you read the first 1000 Bytes using the HTTP option "Range" , which only downloads a given range of bytes from the file you are trying to access via HTTP.</p> <p>The concrete implementation on iOS depends on what libraries you use.</p> <p><strong>Here is an example in Objective-C for a GET request:</strong> <a href="https://stackoverflow.com/questions/9404104/simple-objective-c-get-request">Simple objective-c GET request</a></p> <p>All you need to do is to pass a Range-header to the request, which specifies the range.</p> <p>See API: <a href="https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSMutableURLRequest_Class/Reference/Reference.html" rel="nofollow noreferrer">https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSMutableURLRequest_Class/Reference/Reference.html</a></p> <p>Also check the example for how the Range header field needs to be formatted:</p> <p><a href="http://en.wikipedia.org/wiki/List_of_HTTP_header_fields" rel="nofollow noreferrer">http://en.wikipedia.org/wiki/List_of_HTTP_header_fields</a></p> <p>e.g. this is the syntax for the Range header:</p> <pre><code> Range: bytes=0-1000 </code></pre> <p>You'll need to set this header via the addValue:forHTTPHeaderField instance method.</p>
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    1. POfetch ID3 tags without downloading the whole file in iphone app?
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    1. COThanks, but the problem is how to download the initial part and fetch it?
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    2. COI added to my answer - please check the Mac Developer Library documents for the specifics of the method calls. https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSMutableURLRequest_Class/Reference/Reference.html
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