PHP: Suporte ao método PUT

Suporte ao método PUT

O PHP oferece suporte para o método HTTP PUT utilizado por alguns clientes para armazenar arquivos em um servidor. Requisições PUT são muito mais simples que o envio de arquivos usando requisições POST, elas se parecem com algo assim:

PUT /path/filename.html HTTP/1.1

Isso normalmente significaria que o cliente remoto gostaria de salvar o seguinte conteúdo: /path/filename.html em seu diretório web. É óbvio não se tratar de uma boa ideia que o Apache ou o PHP permitam automaticamente que todos sobrescrevam qualquer arquivo em seu diretório web. Então, para considerar isso como uma requisição é necessário dizer ao seu servidor web que você quer que um determinado script PHP cuide dessa requisição. Para fazer isso no Apache utilize a diretiva Script. Ela pode ser colocada quase em qualquer local de seu arquivo de configuração do Apache. Um local comum é dentro de um bloco <Directory> ou talvez dentro de um bloco <VirtualHost>. Uma linha como a seguinte deve funcionar:

Script PUT /put.php

Isto diz ao Apache para enviar todas as requisições PUT paras as URIs que combinem com o contexto dessa linha para o script put.php. Isto assume que o PHP esteja ativo e permita extensões .php. O destino para todas as requisições PUT para esse script deve ser o próprio script, não o nome do arquivo enviado.

Com o PHP pode ser feito algo como se segue no script put.php. Isso copia o conteúdo de um arquivo enviado para o arquivo myputfile.ext no servidor. Provavelmente é necessário a realização de algumas verificações e/ou autenticação de usuário antes de realizar essa cópia.

Exemplo #1 Salvando arquivos HTTP PUT

<?php
/* PUT data vem do fluxo stdin */
$putdata = fopen("php://input", "r");

/* Abre um arquivo para escrita */
$fp = fopen("myputfile.ext", "w");

/* Lê os dados 1KB de cada vez
   e escreve no arquivo */
while ($data = fread($putdata,1024))
  fwrite($fp,$data);

/* Fecha os fluxos */
fclose($fp);
fclose($putdata);
?>

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Notas Enviadas por Usuários (em inglês) 6 notes

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micronix at gmx dot net ¶

14 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";

        }

?>

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arnaud at caramia dot Fr ¶

1 year ago

We resolved our problem with https://pecl.php.net/package/apfd.

It parses multipart/form-data body (files and payload) with PUT and PATCH http requests, witch was only possible before with POST http request.

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Oscar Fernandez Sierra ¶

3 years ago

This is what worked for me. There are many examples in the web that don't work. I found in https://lornajane.net/posts/2009/putting-data-fields-with-php-curl.

IMPORTANT: You should not use the code

       curl_setopt($ch, CURLOPT_PUT, true);

even if it seems to be the right option (it would be the right option for a POST request, with CURLOPT_POST, but it does not work for a PUT request).

Notice that the constant CURLOPT_CUSTOMREQUEST is used instead of CURLOPT_PUT, and that the value used is "PUT" instead of true.

<?php

        $url = "....."; // put your URL here

        $data = array("a" => $a);

        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));

        $response = curl_exec($ch);
        if ( ! $response) {
            return false;
        }

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polygon dot co dot in at gmail dot com ¶

1 year ago

I was confused with file uploads using the PUT method.
My concern was why can't we upload multiple files using the PUT method with streams
PUT data comes in on the stdin stream
$putdata = fopen("php://input", "r");
Note the $putdata is a file pointer to the file content that is being uploaded.
The data is received on the server on the fly (which means available as it is received)

Secondly, when we are using parse_str(file_get_contents("php://input")).
This means the data is completely received on the server end and is then made available to the script.

When using fopen() one cant parse the data. This can be used when uploading a large file.
The file may range from 100's of MBs to Gigs where streams plays a major role.

Streams make the file data available to script in chunks instead of first saving in the temp folder.
Hence, when using $putdata = fopen("php://input", "r"); one can't pass the payload as well.
If someone wants to pass the payload the only option is in the URL query string.

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San ¶

10 years ago

Instead of using fread fwrite to save uploaded content to a file.
stream_copy_to_stream is much cleaner.

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willy at kochkonsult dot no ¶

3 years ago

All the example code I found for using PUT with PHP always used a default hard-coded file extension for the incoming stream.

The filename from the incoming file PUT request can't be found anywhere from the incoming request (at least I couldn't find it) but mimetype can be found in the $_SERVER global variable.

I used this code to get the correct file extension:

$mimeType = $_SERVER['HTTP_CONTENT_TYPE'];

if ($mimeType!='application/pdf') 
    {   
    header('HTTP/1.1 405 Only PDF files allowed');
    echo("Only PDF files are allowed for upload - this file is ".$mimeType);
    die();
    }
else $fileExtension = 'pdf';

If you have an Apache Tika server available, that would be the best option to analyze the file content to get the mimetype, but that might not be in scope for everyone :-)

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