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    <p>The current implementation of FileTransfer in PhoneGap makes this tricky, but it is possible. The problem is the format of <a href="http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.2" rel="nofollow">multipart/form-data</a> in the post. For the server to correctly interpret a parameter as multi-valued, the raw request payload needs to have a series of Content-Disposition lines with the same name , like this:</p> <pre><code>--AaB03x Content-Disposition: form-data; name="shareWith[]" Joe --AaB03x Content-Disposition: form-data; name="shareWith[]" Jim --AaB03x Content-Disposition: form-data; name="shareWith[]" Jane </code></pre> <p>The array notation in the name indicates that the parameter is multi-valued, and the server will interpret this parameter as an array of values, the way you want.</p> <p>Unfortunately, this is the Objective-C code in the Cordova libs that appends the data to the request payload:</p> <pre><code> NSDictionary* options = [arguments objectAtIndex:5 withDefault:nil]; ... for (NSString* key in options) { ... [postBodyBeforeFile appendData:[[NSString stringWithFormat: @"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", key] dataUsingEncoding:NSUTF8StringEncoding]]; </code></pre> <p>All it does is iterate through your params object (it expects a JS object like <code>{ param1: 'one', param2: 'two' }</code>) and pass each param object key to the key in this method call. It's not smart enough to check to see if the value is an array and if so, append multiple Content-Disposition lines - as you can see from the for statement, it assumes that each key is a string only. And because the options dictionary can't have multiple values with the same key, the form can't be created with Content-Disposition lines with the same name, the way you'd need to to submit multi-valued parameters.</p> <p>However, you should be able to achieve what you want in a less-than-elegant way by building the form names yourself, like this:</p> <pre><code>params = {} params['shareWith[0]'] = 'Joe'; params['shareWith[1]'] = 'Jim'; params['shareWith[2]'] = 'Jane'; </code></pre> <p>The result on the server may be a little different from the above, but this should get you most of the way there. Hopefully this will be addressed in the future and you'll be able to use multi-valued parameters a little more rationally with FileTransfer.</p>
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    1. POPhonegap adding multiple FileTransfer params of the same key, but different values
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    1. COThanks Ryan, people like you inspire me to move my programming to the next level.
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    2. COGlad to hear it helped - thanks so much for the kind comment!
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    3. COHad a facepalm moment this morning when I realized that this is possible after all, if a little ugly. I left the implementation stuff because I think it's kinda interesting, though.
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