PUT Method web form

xbrotherx

I have ot build a web form that allows the user to browse for a file and instead of POSTing or GETing in the method they need ot be able to PUT using the PHP HTTP PUT method.

How in the world do I go about doing this? is is something like:

<form name="upload" method="PUT" enctype="multipart/form-data"action="put.php">

and the put.php file is:

<?php
$filename = $_FILES['filename'];
/* PUT data comes in on the stdin stream */
$putdata = fopen("php://stdin", "r");

/* Open a file for writing */
//$fp = fopen("myputfile.ext", "w");
$fp = fopen($filename, "w");

/* Read the data 1 KB at a time
   and write to the file */
while ($data = fread($putdata, 1024))
  fwrite($fp, $data);

/* Close the streams */
fclose($fp);
fclose($putdata);
?>

Please know that I am about as newbie as a newbie can get. I am an Actionscripter trying to create a file upload interface for an embedded system and they want to upload update files to the system. That's why they want to use PUT.

Help!!

drew010

as far as i know (but i could be wrong) a the URI of the PUT request, should be the location of the filename to be stored. For example if i do
PUT /folder1/newfile.txt HTTP/1.1
etc...

The data in my request SHOULD be written to /foder1/newfile.txt automatically by the server.

I think a post is still appropriate in this situation.

Also, I think you may have the wrong idea about the $_FILES array.

If you have
<input type="file" name="filename">
the following becomes avaiable after a post.

$FILES['filename']['tmp_name'] //location of uploaded file on the server
$FILES['filename']['name'] //the original name from the client computer
$FILES['filename']['type'] //type (as identified by user's browser)
$FILES['filename']['size'] //size (in bytes)

edit: i found this article, which may be of use.
http://www.apacheweek.com/features/put

xbrotherx

thanks for the reply drew010.

After reading that article you sent I fiddled around some more with it and came up with the following which is the same sample script as the documentation has with just a couple of additions:

<?php
$browseLC = $_REQUEST['browseLC'];
$dataLC = $_REQUEST['dataLC'];

$filename = $_FILES['filename'];
$filename_name = $_FILES['filename']['name'];
echo('file = '.$filename_name);
/* PUT data comes in on the stdin stream */
$putdata = fopen("php://stdin", "r");

/* Open a file for writing */
//$fp = fopen("myputfile.ext", "w");
$fp = fopen($filename_name, "w");

/* Read the data 1 KB at a time
   and write to the file */
while ($data = fread($putdata, 1024))
  fwrite($fp, $data);

/* Close the streams */
fclose($fp);
fclose($putdata);
?>

I then let the user browse to the Upgrade file and chose that file then submit it to the server with a POST which directs them to the script above which PUTs it where it needs to go defined by the SCRIPT directive (which I did not setup...another programmer did).

The dev team seemd happy with the results but I still have some work to do . So I will keep you posted.

Thanks again for you help!!

xbrotherx

Ok, so I thought I had it working but ran across an issue. Sure it puts the file up on the server but there is nothing IN the file. The file is empty...0 bytes.

I can echo out the source file's file size with:

$filename_size = $_FILES['filename']['size'];

added to the top of the php file and it outpus correctly.

Any ideas as to why that would happen?

bradgrafelman

I'm a bit confused on all of this PUT business.

Why not just POST the file normally, using PHP's file upload functions, then use [man]move_uploaded_file/man to essentially "put" the file where you want it?

xbrotherx

Well I wish I could give you a direct answer.

From my simple-minded understanding, when you use an HTML form your have three methods to choose from: GET, POST, and PUT. I have been instructed to do a PUT. This requires some tweaking of the apache config file so that when the server recognizes this kind of form action, the server uses the stdin to PUT the file.

Using the samples for the PUT method found in the PHP documentation and sending the file via POST, the file gets copied to the server but there is nothing in the file...0 bytes.

Here is the form control script currently:

<?php
/* Flash LocalConnection Requests */
$browseLC = $_REQUEST['browseLC'];
$dataLC = $_REQUEST['dataLC'];
/* end of LC Requests */

/* store file name of upgrade file */	
$filename = $_FILES['filename'];
$filename_name = $_FILES['filename']['name'];
echo('file = '.$filename_name);

/* PUT data comes in on the stdin stream */
$putdata = fopen("php://stdin", "r");

$descriptorspec = array(
   0 => array("pipe", "r"),  // stdin is a pipe that the child will read from
   1 => array("file", "/tmp/PutUpgrade.stdout", "w"),  // parent stdout 
   2 => array("file", "/tmp/PutUpgrade.stderr", "w")   // parent stderr 
);

$process = proc_open('/usr/local/client/cli/upgrade all', $descriptorspec, $pipes);

if (is_resource($process)) {
   // $pipes now looks like this:
   // 0 => writeable handle connected to child stdin
   // 1 => readable handle connected to child stdout
   // 2 => readable handle connected to child stderr

/* Read the data 1 KB at a time
   and write to the file */
while ($data = fread($putdata, 1024))
  fwrite($pipes[0], $data);

   fclose($pipes[0]);

   // It is important that you close any pipes before calling
   // proc_close in order to avoid a deadlock
   $return_value = proc_close($process);
}

/* Close the streams */
fclose($putdata);

/* send result back to Flash */
print "<HTML><BODY><script>window.top.upLoadEnd('$browseLC','$return_value','$filename_name','$dataLC')</script></HTML>";
?>

bradgrafelman

Start basic. Make a simple script that takes an uploaded file and moves it somewhere. Copy PHP's examples from the manuals.

If the file is empty even using their simple examples, it's most likely a problem with permissions on the webserver, not PHP.