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POuserland multipart/form-data handler
 

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    <p>I'm looking for a drop-in include script / class that dissects <code>multipart/form-data</code> and fills up <code>$_POST</code>(+raw) and <code>$_FILES</code> from it. Usually PHP does that itself. But because the automatic handling is insufficient for me and makes <a href="http://php.net/manual/en/wrappers.php.php" rel="nofollow noreferrer"><code>php://input</code></a> inaccesible<sup><a href="https://stackoverflow.com/questions/1361673/get-raw-post-data">[1]</a></sup> I'll probably be using something like this to prevent that:</p> <blockquote> <p><code>RewriteRule .* - [E=CONTENT_TYPE:noparsing/for-you-php]</code><br> <a href="https://serverfault.com/questions/257735/rewriterule-e-content-typefoo-bar-has-no-effect-on-apache-mod-php">Does not work. Actual solution requires mod_headers and <code>RequestHeader set</code>...</a></p> </blockquote> <p>The extracting procedure might not be that complex. But I'd rather use a well-tested solution. And foremost I would prefer an implementation that uses <code>fgets</code> for splitting, and mimics the <code>$_FILES</code> handling closely and efficiently. Finding the end of binary payloads would seem rather tricky to me, in particular when you have to strip off <code>\r\n</code> but might encounter clients that only send <code>\n</code> (not allowed, but possible).</p> <p>I'm certain something like this exists. But I'm having a hard time googling it. Does anyone know an implementation? (PEAR::mimeDecode can be hacked to get sort of working for form-data, but is a memory hog.)</p> <p>The use case in short: need to preserve the raw field names (including whitespace and special characters), for logging, but can't avoid file uploads always.</p> <hr> <p>For decorative purposes, that's how a POST request looks:</p> <pre><code>POST / HTTP/1.1 Host: localhost:8000 Content-Length: 17717 Content-Type: multipart/form-data; boundary=----------3wCuBwquE9P7A4OEylndVx </code></pre> <p>And after a <code>\r\n\r\n</code> sequence the multipart/ payload follows like this:</p> <pre><code>------------3wCuBwquE9P7A4OEylndVx Content-Disposition: form-data; name="_charset_" windows-1252 ------------3wCuBwquE9P7A4OEylndVx Content-Disposition: form-data; name=" text field \\ 1 \";inject=1" text1 te twj sakfkl ------------3wCuBwquE9P7A4OEylndVx Content-Disposition: form-data; name="file"; filename="dial.png" Content-Type: image/png IPNG Z @@@MIHDR@@B`@@B;HF@@@-'.e@@@AsRGB@.N\i@@@FbKGD@?@?@? ='S@@@ @@@GtIMEGYAAU,#}BRU@@@YtEXtComment@Created with GIMPWANW@@ @IDATxZl]w| </code></pre>
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    1. COThis will probably become a bounty question..
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    2. COWill it be guaranteed that each MIME part in the multipart will have a Content-Length? I don't remember if the spec requires this or not. I'd imagine it would.
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    3. COThe bummer is that the spec [RFC2388](http://www.faqs.org/rfcs/rfc2388.html) does not mention `Content-Length` at all. While I would assume most current browsers do so (and use base64 encoding at least), I'm actually trying to support the more wacky clients. (Edit: No, not even Opera does it.)
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