379 lines
9.0 KiB
PHP
379 lines
9.0 KiB
PHP
<?php
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/**
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* pjdietz\WellRESTed\Request
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*
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* @author PJ Dietz <pj@pjdietz.com>
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* @copyright Copyright 2013 by PJ Dietz
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* @license MIT
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*/
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namespace pjdietz\WellRESTed;
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// TODO: Include port in the URI
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/**
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* A Request instance represents an HTTP request. This class has two main uses:
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*
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* First, you can access a singleton instance via the getRequest() method that
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* represents the request sent to the server. The instance will contain the URI,
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* headers, body, etc.
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*
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* Second, you can create a custom Request and use it to obtain a Response
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* from a server through cURL.
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*
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* @property string hostname Hostname part of the URI
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* @property string method HTTP method (GET, POST, PUT, DELETE, etc.)
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* @property string path Path component of the URI for the request
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* @property-read string pathParts Fragments of the path, delimited by slashes
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* @property array query Associative array of query parameters
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* @property array uri Full URI (protocol, hostname, path, etc.)
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*/
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class Request extends Message
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{
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/**
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* The Hostname for the request (e.g., www.google.com)
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*
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* @var string
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*/
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protected $hostname;
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/**
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* HTTP method or verb for the request
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*
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* @var string
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*/
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protected $method = 'GET';
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/**
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* Path component of the URI for the request
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*
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* @var string
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*/
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protected $path = '/';
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/**
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* Array of fragments of the path, delimited by slashes
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*
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* @var array
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*/
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protected $pathParts;
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/**
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* Associative array of query parameters
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*
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* @var array
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*/
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protected $query;
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/**
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* Singleton instance derived from reading info from Apache.
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*
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* @var Request
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* @static
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*/
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static protected $theRequest;
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// -------------------------------------------------------------------------
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/**
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* Create a new Request instance.
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*
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* @param string|null $uri
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* @param string $method
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*/
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public function __construct($uri = null, $method = 'GET')
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{
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parent::__construct();
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if (!is_null($uri)) {
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$this->setUri($uri);
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}
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$this->method = $method;
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}
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// -------------------------------------------------------------------------
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// Accessors
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/**
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* Return the hostname portion of the URI
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*
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* @return string
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*/
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public function getHostname()
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{
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return $this->hostname;
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}
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/**
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* Assign the hostname portion of the URI
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*
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* @param string $hostname
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*/
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public function setHostname($hostname)
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{
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$this->hostname = $hostname;
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}
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/**
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* Return if the hostname portion of the URI is set.
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*
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* @return bool
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*/
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public function issetHostName()
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{
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return isset($this->hostname);
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}
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/**
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* Unset the hostname portion of the URI.
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*/
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public function unsetHostname()
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{
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unset($this->hostname);
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}
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/**
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* Return the method (e.g., GET, POST, PUT, DELETE)
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*
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* @return string
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*/
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public function getMethod()
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{
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return $this->method;
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}
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/**
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* Assign the method (e.g., GET, POST, PUT, DELETE)
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*
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* @param string $method
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*/
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public function setMethod($method)
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{
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$this->method = $method;
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}
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/**
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* Return the path part of the URI as a string.
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*
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* @return string
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*/
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public function getPath()
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{
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return $this->path;
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}
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/**
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* Set the path and pathParts members.
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*
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* @param string $path
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*/
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public function setPath($path)
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{
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$this->path = $path;
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$this->pathParts = explode('/', substr($path, 1));
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}
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/**
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* Return an array of the sections of the path delimited by slashes.
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*
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* @return array
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*/
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public function getPathParts()
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{
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return $this->pathParts;
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}
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/**
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* Return an associative array representing the query.
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*
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* @return array
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*/
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public function getQuery()
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{
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return $this->query;
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}
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/**
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* Set the query. The value passed can be a query string of key-value pairs
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* joined by ampersands or it can be an associative array.
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*
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* @param string|array $query
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* @throws \InvalidArgumentException
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*/
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public function setQuery($query)
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{
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if (is_string($query)) {
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$qs = $query;
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parse_str($qs, $query);
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}
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if (is_array($query)) {
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$this->query = $query;
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} else {
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throw new \InvalidArgumentException('Unable to parse query string.');
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}
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}
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/**
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* Return the full URI includeing protocol, hostname, path, and query.
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*
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* @return array
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*/
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public function getUri()
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{
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$uri = strtolower($this->protocol) . '://' . $this->hostname . $this->path;
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if ($this->query) {
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$uri .= '?' . http_build_query($this->query);
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}
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return $uri;
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}
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/**
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* Set the URI for the Request. This sets the other members, such as path,
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* hostname, etc.
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*
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* @param string $uri
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*/
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public function setUri($uri)
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{
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$parsed = parse_url($uri);
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$host = isset($parsed['host']) ? $parsed['host'] : '';
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$this->setHostname($host);
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$path = isset($parsed['path']) ? $parsed['path'] : '';
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$this->setPath($path);
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$query = isset($parsed['query']) ? $parsed['query'] : '';
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$this->setQuery($query);
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}
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// -------------------------------------------------------------------------
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/**
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* Make a cURL request out of the instance and return a Response.
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*
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* @return Response
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* @throws exceptions\CurlException
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*/
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public function request()
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{
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$ch = curl_init();
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// Set the URL.
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curl_setopt($ch, CURLOPT_URL, $this->uri);
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// Include headers in the response.
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curl_setopt($ch, CURLOPT_HEADER, 1);
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// Return the response from curl_exec().
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
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// Set the method. Include the body, if needed.
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switch ($this->method) {
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case 'GET':
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curl_setopt($ch, CURLOPT_HTTPGET, 1);
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break;
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case 'POST':
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curl_setopt($ch, CURLOPT_POST, 1);
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curl_setopt($ch, CURLOPT_POSTFIELDS, $this->body);
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break;
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case 'PUT':
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curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'PUT');
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curl_setopt($ch, CURLOPT_POSTFIELDS, $this->body);
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break;
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default:
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curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $this->method);
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curl_setopt($ch, CURLOPT_POSTFIELDS, $this->body);
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break;
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}
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// Add headers.
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curl_setopt($ch, CURLOPT_HTTPHEADER, $this->headerLines);
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// Make the cURL request.
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$result = curl_exec($ch);
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// Throw an exception in the event of a cURL error.
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if ($result === false) {
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$error = curl_error($ch);
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$errno = curl_errno($ch);
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curl_close($ch);
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throw new Exceptions\CurlException($error, $errno);
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}
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// Make a reponse to populate and return with data obtained via cURL.
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$resp = new Response();
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$resp->statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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// Split the result into headers and body.
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list ($headers, $body) = explode("\r\n\r\n", $result, 2);
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// Set the body. Do not auto-add the Content-length header.
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$resp->setBody($body, false);
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// Iterate over the headers line by line and add each one.
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foreach (explode("\r\n", $headers) as $header) {
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if (strpos($header, ':')) {
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list ($headerName, $headerValue) = explode(':', $header, 2);
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$resp->setHeader($headerName, ltrim($headerValue));
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}
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}
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curl_close($ch);
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return $resp;
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}
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/**
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* Set instance members based on the HTTP request sent to the server.
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*/
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public function readHttpRequest()
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{
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$this->setBody(file_get_contents("php://input"), false);
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$this->headers = apache_request_headers();
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// Add case insensitive headers to the lookup table.
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foreach ($this->headers as $key => $value) {
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$this->headerLookup[strtolower($key)] = $key;
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}
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$this->method = $_SERVER['REQUEST_METHOD'];
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$this->uri = $_SERVER['REQUEST_URI'];
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$this->hostname = $_SERVER['HTTP_HOST'];
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}
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/**
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* Return a reference to the singleton instance of the Request derived
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* from the server's information about the request sent to the script.
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*
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* @return Request
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* @static
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*/
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public static function getRequest()
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{
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if (!isset(self::$theRequest)) {
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$klass = __CLASS__;
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$request = new $klass();
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$request->readHttpRequest();
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self::$theRequest = $request;
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}
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return self::$theRequest;
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}
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}
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