PUT-Unterstützung

PHP unterstützt die HTTP PUT Methode, welche von einigen Clients verwendet wird, um Dateien auf dem Server zu speichern. PUT-Anfragen sind weitaus unkomplizierter als ein POST Dateiupload und sehen etwa so aus:

PUT /path/filename.html HTTP/1.1

Das würde normalerweise bedeuten, dass der Client den nachfolgenden Inhalt als /path/filename.html auf dem Server speichern will. Natürlich ist es keine gute Idee, dass PHP oder Apache jeden Benutzer beliebige Dateien überschreiben lässt. Um eine solche Anfrage bearbeiten zu können, muss der Webserver erst angewiesen werden, ein bestimmtes PHP-Skript für die Abarbeitung aufzurufen. In Apache wird dies durch die Script Direktive festgelegt. Sie kann fast überall in der Apache-Konfigurationsdatei platziert werden, gebräuchlich ist die Platzierung innerhalb einer <Directory>- oder Virtualhost-Sektion. Eine Zeile wie die folgende erledigt dies:

Script PUT /put.php

Diese Zeile legt fest, dass Apache alle PUT-Anfragen für URIs, die dem Kontext entsprechen, in dem diese Zeile steht, an das put.php Skript weiterleitet. Dies setzt natürlich voraus, dass PHP aktiv und für die .php-Dateierweiterung registriert ist.

In der put.php könnte anschließend ein Code wie der folgende verwendet werden. Dieser würde den Inhalt der hochgeladenen Datei in die Datei myputfile.ext auf dem Server kopieren.

Beispiel #1 Speichern von HTTP PUT Dateien

<?php
/* PUT Daten kommen in den stdin Stream */
$putdata fopen("php://stdin","r");

/* Eine Datei zum Schreiben öffnen */
$fp fopen("myputfile.ext","w");

/* Jeweils 1kB Daten lesen und
   in die Datei schreiben */
while ($data fread($putdata,1024))
  
fwrite($fp,$data);

/* Die Streams schließen */
fclose($fp);
fclose($putdata);
?>

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User Contributed Notes 7 notes

up
15
micronix at gmx dot net
4 years ago
Hello PHP World After many Hours of worryness :=)

I have found the Solution for Resume or Pause Uploads
In this Code Snippet it is the Server Side not Client on any Desktop Programm you must use byte ranges to calculate the uploaded bytes and missing of total bytes.

Here the PHP Code

<?php
$CHUNK
= 8192;

        try {
            if (!(
$putData = fopen("php://input", "r")))
                throw new
Exception("Can't get PUT data.");

           
// now the params can be used like any other variable
            // see below after input has finished

           
$tot_write = 0;
           
$tmpFileName = "/var/dev/tmp/PUT_FILE";
           
// Create a temp file
           
if (!is_file($tmpFileName)) {
               
fclose(fopen($tmpFileName, "x")); //create the file and close it
                // Open the file for writing
               
if (!($fp = fopen($tmpFileName, "w")))
                    throw new
Exception("Can't write to tmp file");

               
// Read the data a chunk at a time and write to the file
               
while ($data = fread($putData, $CHUNK)) {
                   
$chunk_read = strlen($data);
                    if ((
$block_write = fwrite($fp, $data)) != $chunk_read)
                        throw new
Exception("Can't write more to tmp file");

                   
$tot_write += $block_write;
                }

                if (!
fclose($fp))
                    throw new
Exception("Can't close tmp file");

                unset(
$putData);
            } else {
               
// Open the file for writing
               
if (!($fp = fopen($tmpFileName, "a")))
                    throw new
Exception("Can't write to tmp file");

               
// Read the data a chunk at a time and write to the file
               
while ($data = fread($putData, $CHUNK)) {
                   
$chunk_read = strlen($data);
                    if ((
$block_write = fwrite($fp, $data)) != $chunk_read)
                        throw new
Exception("Can't write more to tmp file");

                   
$tot_write += $block_write;
                }

                if (!
fclose($fp))
                    throw new
Exception("Can't close tmp file");

                unset(
$putData);
            }

           
// Check file length and MD5
           
if ($tot_write != $file_size)
                throw new
Exception("Wrong file size");

           
$md5_arr = explode(' ', exec("md5sum $tmpFileName"));
           
$md5 = $md5sum_arr[0];
            if (
$md5 != $md5sum)
                throw new
Exception("Wrong md5");
        } catch (
Exception $e) {
            echo
'', $e->getMessage(), "\n";
        }
?>
up
1
yaogzhan at gmail dot com
8 years ago
PUT raw data comes in php://input, and you have to use fopen() and fread() to get the content. file_get_contents() is useless.

The HTTP PUT request MUST contain a Content-Length header to specify the length (in bytes) of the body, or the server will not be able to know when the input stream is over. This is the common problem for many to find the php://input empty if no such header available.

This should make PUT work properly on win32 using PHP5.1.1 and apache2.
up
1
mikeb at mikebanahan dot com
11 years ago
I have spent a lot of time trying to make PUT work with Apache 2.0.40. I have not yet been able to find any way of making the Script directive invoke php via mod_php, the only way has been to have a file called example.cgi and invoke it via CGI, with the file starting
#!/usr/bin/php
so the PHP interpreter is invoked through the CGI mechanism and not as a module.

If there IS a way of making it work 'right' I'd love to know! After six hours of messing around, I've settled for CGI. The error messages in the apache error log are significantly misleading and the whole thing has been an exercise in frustration.

Attempts to use AddHandler and all 'normal' ways of trying to persuade Apache to do this have been fruitless. It does seem as if PUT can only be handled by CGI invocation.
up
0
San
8 months ago
Instead of using fread fwrite to save uploaded content to a file.
stream_copy_to_stream is much cleaner.
up
0
warhog at warhog dot net
9 years ago
NOTE: The <Script>-Directive can not be placed in .htaccess files.

So if you're having shared webspace and no access to the apache-configuration file you will have little chance to make something like this work.

But you can solve the problem, using mod_rewrite (for Apache) - for further information see the documentation at http://httpd.apache.org/docs/2.0/mod/mod_rewrite.html
up
-1
gherson
9 years ago
A Case Study:  To set up publishing with Netscape 7.2 Composer to Apache/PHP, no need to use CGI (which I tried unsuccessfully for too long) or to alter Apache's httpd.conf.  I needed only to click Publish As, fill in put2disk.php as the filename (where its contents are the below), and fill in that file's dir as the "Publishing address".
XAMPP 1.4.14: Apache/2.0.54 (Win32) mod_ssl/2.0.54 OpenSSL/0.9.7g PHP/5.0.4.

<? // filename: put2disk.php.

//file_put_contents ("get_def.out", print_r (get_defined_vars(), TRUE)); // debugging

// Two slurp methods: (a) didn't work, (b) did.
//$stdin_rsc = fopen("php://input", "r");
//$putdata='';
//while ($putdata .= fread($stdin_rsc, 1024)); // a. Hangs the "Publishing..." dialog.
//while (!feof($stdin_rsc)) $putdata.=fread($stdin_rsc, 8192); // b. Worked, but file_get_contents is faster.
//fclose($stdin_rsc);

// All that's nec:
$putdata=file_get_contents('php://input'); // Not php://stdin! (When the ability to see error messages isn't available, the doc (this manual page) needs to be more accurate.)

file_put_contents("stdin.out",$putdata);
?>
up
-6
kicaj
11 months ago
to create variable such as $_GET, $_POST use
that solution

<?php
    $_SERVER
['REQUEST_METHOD']==="PUT" ? parse_str(file_get_contents('php://input', false , null, -1 , $_SERVER['CONTENT_LENGTH'] ), $_PUT): $_PUT=array();
?>
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