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Response.php
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Tue, Nov 26, 23:41

Response.php
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<?php
namespace Httpful;
/**
* Models an HTTP response
*
* @author Nate Good <me@nategood.com>
*/
class Response
{
public $body,
$raw_body,
$headers,
$raw_headers,
$request,
$code = 0,
$content_type,
$parent_type,
$charset,
$is_mime_vendor_specific = false,
$is_mime_personal = false;
private $parsers;
/**
* @param string $body
* @param string $headers
* @param Request $request
*/
public function __construct($body, $headers, Request $request)
{
$this->request = $request;
$this->raw_headers = $headers;
$this->raw_body = $body;
$this->code = $this->_parseCode($headers);
$this->headers = Response\Headers::fromString($headers);
$this->_interpretHeaders();
$this->body = $this->_parse($body);
}
/**
* Status Code Definitions
*
* Informational 1xx
* Successful 2xx
* Redirection 3xx
* Client Error 4xx
* Server Error 5xx
*
* http://pretty-rfc.herokuapp.com/RFC2616#status.codes
*
* @return bool Did we receive a 4xx or 5xx?
*/
public function hasErrors()
{
return $this->code >= 400;
}
/**
* @return return bool
*/
public function hasBody()
{
return !empty($this->body);
}
/**
* Parse the response into a clean data structure
* (most often an associative array) based on the expected
* Mime type.
* @return array|string|object the response parse accordingly
* @param string Http response body
*/
public function _parse($body)
{
// If the user decided to forgo the automatic
// smart parsing, short circuit.
if (!$this->request->auto_parse) {
return $body;
}
// If provided, use custom parsing callback
if (isset($this->request->parse_callback)) {
return call_user_func($this->request->parse_callback, $body);
}
// Decide how to parse the body of the response in the following order
// 1. If provided, use the mime type specifically set as part of the `Request`
// 2. If a MimeHandler is registered for the content type, use it
// 3. If provided, use the "parent type" of the mime type from the response
// 4. Default to the content-type provided in the response
$parse_with = $this->request->expected_type;
if (empty($this->request->expected_type)) {
$parse_with = Httpful::hasParserRegistered($this->content_type)
? $this->content_type
: $this->parent_type;
}
return Httpful::get($parse_with)->parse($body);
}
/**
* Parse text headers from response into
* array of key value pairs
* @return array parse headers
* @param string $headers raw headers
*/
public function _parseHeaders($headers)
{
$headers = preg_split("/(\r|\n)+/", $headers, -1, \PREG_SPLIT_NO_EMPTY);
$parse_headers = array();
for ($i = 1; $i < count($headers); $i++) {
list($key, $raw_value) = explode(':', $headers[$i], 2);
$key = trim($key);
$value = trim($raw_value);
if (array_key_exists($key, $parse_headers)) {
// See HTTP RFC Sec 4.2 Paragraph 5
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2
// If a header appears more than once, it must also be able to
// be represented as a single header with a comma-separated
// list of values. We transform accordingly.
$parse_headers[$key] .= ',' . $value;
} else {
$parse_headers[$key] = $value;
}
}
return $parse_headers;
}
public function _parseCode($headers)
{
$parts = explode(' ', substr($headers, 0, strpos($headers, "\r\n")));
if (count($parts) < 2 || !is_numeric($parts[1])) {
throw new \Exception("Unable to parse response code from HTTP response due to malformed response");
}
return intval($parts[1]);
}
/**
* After we've parse the headers, let's clean things
* up a bit and treat some headers specially
*/
public function _interpretHeaders()
{
// Parse the Content-Type and charset
$content_type = isset($this->headers['Content-Type']) ? $this->headers['Content-Type'] : '';
$content_type = explode(';', $content_type);
$this->content_type = $content_type[0];
if (count($content_type) == 2 && strpos($content_type[1], '=') !== false) {
list($nill, $this->charset) = explode('=', $content_type[1]);
}
// RFC 2616 states "text/*" Content-Types should have a default
// charset of ISO-8859-1. "application/*" and other Content-Types
// are assumed to have UTF-8 unless otherwise specified.
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.7.1
// http://www.w3.org/International/O-HTTP-charset.en.php
if (!isset($this->charset)) {
$this->charset = substr($this->content_type, 5) === 'text/' ? 'iso-8859-1' : 'utf-8';
}
// Is vendor type? Is personal type?
if (strpos($this->content_type, '/') !== false) {
list($type, $sub_type) = explode('/', $this->content_type);
$this->is_mime_vendor_specific = substr($sub_type, 0, 4) === 'vnd.';
$this->is_mime_personal = substr($sub_type, 0, 4) === 'prs.';
}
// Parent type (e.g. xml for application/vnd.github.message+xml)
$this->parent_type = $this->content_type;
if (strpos($this->content_type, '+') !== false) {
list($vendor, $this->parent_type) = explode('+', $this->content_type, 2);
$this->parent_type = Mime::getFullMime($this->parent_type);
}
}
/**
* @return string
*/
public function __toString()
{
return $this->raw_body;
}
}

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