guzzle/README.md

Guzzle, PHP HTTP client and webservice framework
================================================

Guzzle is a PHP HTTP client and framework for building RESTful web service clients.

- Extremely powerful API provides all the power of cURL with a simple interface.
- Truly take advantage of HTTP/1.1 with persistent connections, connection pooling, and parallel requests.
- Service description DSL allows you build awesome web service clients faster.
- Symfony2 event-based plugin system allows you to completely modify the behavior of a request.
- Includes a custom node.js webserver to test your clients.
- Unit-tested with PHPUnit with 100% code coverage.

Getting started
---------------

- [Download the phar](http://guzzlephp.org/guzzle.phar) and include it in your project ([minimal phar](http://guzzlephp.org/guzzle-min.phar))
- Docs: [www.guzzlephp.org](http://www.guzzlephp.org/)
- Forum: https://groups.google.com/forum/?hl=en#!forum/guzzle
- IRC: [#guzzlephp](irc://irc.freenode.net/#guzzlephp) channel on irc.freenode.net

### Installing via Composer

The recommended way to install Guzzle is through [composer](http://getcomposer.org). You will need to add Guzzle as a dependency in your project's ``composer.json`` file:

    {
        "require": {
            "guzzle/guzzle": "*"
        }
    }

You can find out more on how to install Composer, configure autloading, and other best-practices for defining dependencies at http://getcomposer.org/doc/00-intro.md

Features
--------

- Supports GET, HEAD, POST, DELETE, PUT, PATCH, OPTIONS, and any custom verbs
- Allows full access to request and response headers
- Persistent connections are implicitly managed by Guzzle, resulting in huge performance benefits
- [Send requests in parallel](http://guzzlephp.org/tour/http.html#send-http-requests-in-parallel)
- Cookie sessions can be maintained between requests using the [CookiePlugin](http://guzzlephp.org/tour/http.html#cookie-session-plugin)
- Allows custom [entity bodies](http://guzzlephp.org/tour/http.html#entity-bodies), including sending data from a PHP stream and downloading data to a PHP stream
- Responses can be cached and served from cache using the [caching forward proxy plugin](http://guzzlephp.org/tour/http.html#php-based-caching-forward-proxy)
- Failed requests can be retried using [truncated exponential backoff](http://guzzlephp.org/tour/http.html#truncated-exponential-backoff) with custom retry policies
- Entity bodies can be validated automatically using Content-MD5 headers and the [MD5 hash validator plugin](http://guzzlephp.org/tour/http.html#md5-hash-validator-plugin)
- All data sent over the wire can be logged using the [LogPlugin](http://guzzlephp.org/tour/http.html#over-the-wire-logging)
- Subject/Observer signal slot system for unobtrusively [modifying request behavior](http://guzzlephp.org/guide/http/creating_plugins.html)
- Supports all of the features of libcurl including authentication, compression, redirects, SSL, proxies, etc
- Web service client framework for building future-proof interfaces to web services
- Includes a [service description DSL](http://guzzlephp.org/guide/service/service_descriptions.html) for quickly building webservice clients
- Full support for [URI templates](http://tools.ietf.org/html/rfc6570)
- Advanced batching functionality to efficiently send requests or commands in parallel with customizable batch sizes and transfer strategies

HTTP basics
-----------

```php
<?php

use Guzzle\Http\Client;

$client = new Client('http://www.example.com/api/v1/key/{{key}}', array(
    'key' => '***'
));

// Issue a path using a relative URL to the client's base URL
// Sends to http://www.example.com/api/v1/key/***/users
$request = $client->get('users');
$response = $request->send();

// Relative URL that overwrites the path of the base URL
$request = $client->get('/test/123.php?a=b');

// Issue a head request on the base URL
$response = $client->head()->send();
// Delete user 123
$response = $client->delete('users/123')->send();

// Send a PUT request with custom headers
$response = $client->put('upload/text', array(
    'X-Header' => 'My Header'
), 'body of the request')->send();

// Send a PUT request using the contents of a PHP stream as the body
// Send using an absolute URL (overrides the base URL)
$response = $client->put('http://www.example.com/upload', array(
    'X-Header' => 'My Header'
), fopen('http://www.test.com/', 'r'));

// Create a POST request with a file upload (notice the @ symbol):
$request = $client->post('http://localhost:8983/solr/update', null, array (
    'custom_field' => 'my value',
    'file' => '@/path/to/documents.xml'
));

// Create a POST request and add the POST files manually
$request = $client->post('http://localhost:8983/solr/update')
    ->addPostFiles(array(
        'file' => '/path/to/documents.xml'
    ));

// Responses are objects
echo $response->getStatusCode() . ' ' . $response->getReasonPhrase() . "\n";

// Requests and responses can be cast to a string to show the raw HTTP message
echo $request . "\n\n" . $response;

// Create a request based on an HTTP message
$request = RequestFactory::fromMessage(
    "PUT / HTTP/1.1\r\n" .
    "Host: test.com:8081\r\n" .
    "Content-Type: text/plain"
    "Transfer-Encoding: chunked\r\n" .
    "\r\n" .
    "this is the body"
);
```

Send requests in parallel
-------------------------

```php
<?php

try {
    $client = new Guzzle\Http\Client('http://www.myapi.com/api/v1');
    $responses = $client->send(array(
        $client->get('users'),
        $client->head('messages/123'),
        $client->delete('orders/123')
    ));
} catch (Guzzle\Common\Exception\ExceptionCollection $e) {
    echo "The following requests encountered an exception: \n";
    foreach ($e as $exception) {
        echo $exception->getRequest() . "\n" . $exception->getMessage() . "\n";
    }
}
```

URI templates
-------------

Guzzle supports the entire [URI templates RFC](http://tools.ietf.org/html/rfc6570).

```php
<?php

$client = new Guzzle\Http\Client('http://www.myapi.com/api/v1', array(
    'path' => '/path/to',
    'a'    => 'hi',
    'data' => array(
        'foo'  => 'bar',
        'mesa' => 'jarjar'
    )
));

$request = $client->get('http://www.test.com{+path}{?a,data*}');
```

The generated request URL would become: ``http://www.test.com/path/to?a=hi&foo=bar&mesa=jarajar``

You can specify URI templates and an array of additional template variables to use when creating requests:

```php
<?php

$client = new Guzzle\Http\Client('http://test.com', array(
    'a' => 'hi'
));

$request = $client->get(array('/{?a,b}', array(
    'b' => 'there'
));
```

The resulting URL would become ``http://test.com?a=hi&b=there``

Unit testing
------------

[![Build Status](https://secure.travis-ci.org/guzzle/guzzle.png)](http://travis-ci.org/guzzle/guzzle)

You will first need to clone the GitHub repository:

```
git clone git@github.com:guzzle/guzzle.git
cd guzzle
```

Next you will need to make sure PHPUnit is configured, Composer is installed, and you have installed Guzzle's
testing dependencies.  This can be achieved using the `test-init` Phing task.  After running this task, run `phpunit`.

```
phing test-init
phpunit
```

If you do not have Phing installed, you will need to perform the installation steps manually:

```
curl -s http://getcomposer.org/installer | php
php composer.phar install --dev
cp phpunit.xml.dist phpunit.xml
phpunit
```