Class CakeResponse
CakeResponse is responsible for managing the response text, status and headers of a HTTP response.
By default controllers will use this class to render their response. If you are going to use a custom response class it should subclass this object in order to ensure compatibility.
Copyright: Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
License: License (http://www.opensource.org/licenses/mit-license.php)
Location: Cake/Network/CakeResponse.php
Properties summary
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$_bodyprotectedstringBuffer string for response message -
$_cacheDirectivesprotectedstringHolds all the cache directives that will be converted into headers when sending the request
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$_charsetprotectedstringThe charset the response body is encoded with -
$_contentTypeprotectedintegerContent type to send. This can be an 'extension' that will be transformed using the $_mimetypes array or a complete mime-type
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$_cookiesprotectedarrayHolds cookies to be sent to the client -
$_headersprotectedarrayBuffer list of headers -
$_mimeTypesprotectedarrayHolds known mime type mappings -
$_protocolprotectedstringProtocol header to send to the client -
$_statusprotectedintegerStatus code to send to the client -
$_statusCodesprotectedarrayHolds HTTP response statuses
Method Summary
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__construct() public
Class constructor -
__toString() public
String conversion. Fetches the response body as a string. Does not send headers.
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_getUTCDate() protected
Returns a DateTime object initialized at the $time param and using UTC as timezone
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_sendContent() protected
Sends a content string to the client. -
_sendHeader() protected
Sends a header to the client. -
_setCacheControl() protected
Helper method to generate a valid Cache-Control header from the options set in other methods
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_setContent() protected
Sets the response body to an empty text if the status code is 204 or 304 -
_setContentLength() protected
Calculates the correct Content-Length and sets it as a header in the response Will not set the value if already set or if the output is compressed.
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_setContentType() protected
Formats the Content-Type header based on the configured contentType and charset the charset will only be set in the header if the response is of type text/*
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_setCookies() protected
Sets the cookies that have been added via static method CakeResponse::addCookie() before any other output is sent to the client. Will set the cookies in the order they have been set.
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body() public
Buffers the response message to be sent if $content is null the current buffer is returned
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cache() public
Sets the correct headers to instruct the client to cache the response. -
charset() public
Sets the response charset if $charset is null the current charset is returned
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checkNotModified() public
Checks whether a response has not been modified according to the 'If-None-Match' (Etags) and 'If-Modified-Since' (last modification date) request headers headers. If the response is detected to be not modified, it is marked as so accordingly so the client can be informed of that.
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compress() public
Sets the correct output buffering handler to send a compressed response. Responses will be compressed with zlib, if the extension is available.
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cookie() public
Getter/Setter for cookie configs -
disableCache() public
Sets the correct headers to instruct the client to not cache the response -
download() public
Sets the correct headers to instruct the browser to download the response as a file. -
etag() public
Sets the response Etag, Etags are a strong indicative that a response can be cached by a HTTP client. A bad way of generaing Etags is creating a hash of the response output, instead generate a unique hash of the unique components that identifies a request, such as a modification time, a resource Id, and anything else you consider it makes it unique.
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expires() public
Sets the Expires header for the response by taking an expiration time If called with no parameters it will return the current Expires value
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getMimeType() public
Returns the mime type definition for an alias -
header() public
Buffers a header string to be sent Returns the complete list of buffered headers
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httpCodes() public
Queries & sets valid HTTP response codes & messages. -
length() public
Sets the Content-Length header for the response If called with no arguments returns the last Content-Length set
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mapType() public
Maps a content-type back to an alias -
maxAge() public
Sets the Cache-Control max-age directive. The max-age is the number of seconds after which the response should no longer be considered a good candidate to be fetched from the local (client) cache. If called with no parameters, this function will return the current max-age value if any
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modified() public
Sets the Last-Modified header for the response by taking an modification time If called with no parameters it will return the current Last-Modified value
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mustRevalidate() public
Sets the Cache-Control must-revalidate directive. must-revalidate indicates that the response should not be served stale by a cache under any cirumstance without first revalidating with the origin. If called with no parameters, this function will return wheter must-revalidate is present.
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notModified() public
Sets the response as Not Modified by removing any body contents setting the status code to "304 Not Modified" and removing all conflicting headers
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outputCompressed() public
Returns whether the resulting output will be compressed by PHP -
protocol() public
Sets the protocol to be used when sending the response. Defaults to HTTP/1.1 If called with no arguments, it will return the current configured protocol
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send() public
Sends the complete response to the client including headers and message body. Will echo out the content in the response body.
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sharable() public
Sets whether a response is eligible to be cached by intermediate proxies This method controls the
publicorprivatedirective in the Cache-Control header -
sharedMaxAge() public
Sets the Cache-Control s-maxage directive. The max-age is the number of seconds after which the response should no longer be considered a good candidate to be fetched from a shared cache (like in a proxy server). If called with no parameters, this function will return the current max-age value if any
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statusCode() public
Sets the HTTP status code to be sent if $code is null the current code is returned
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type() public
Sets the response content type. It can be either a file extension which will be mapped internally to a mime-type or a string representing a mime-type if $contentType is null the current content type is returned if $contentType is an associative array, it will be stored as a content type definition
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vary() public
Sets the Vary header for the response, if an array is passed, values will be imploded into a comma separated string. If no parameters are passed, then an array with the current Vary header value is returned
Method Detail
__construct() public ¶
__construct( array $options = array() )
Class constructor
Parameters
- array $options optional array()
list of parameters to setup the response. Possible values are: - body: the response text that should be sent to the client - status: the HTTP status code to respond with - type: a complete mime-type string or an extension mapped in this class - charset: the charset for the response body
__toString() public ¶
__toString( )
String conversion. Fetches the response body as a string. Does not send headers.
Returns
_getUTCDate() protected ¶
_getUTCDate( string|integer|DateTime $time = null )
Returns a DateTime object initialized at the $time param and using UTC as timezone
Parameters
- string|integer|DateTime $time optional null
Returns
_sendContent() protected ¶
_sendContent( string $content )
Sends a content string to the client.
Parameters
- string $content
- string to send as response body
_sendHeader() protected ¶
_sendHeader( string $name , string $value = null )
Sends a header to the client.
Parameters
- string $name
- the header name
- string $value optional null
- the header value
_setCacheControl() protected ¶
_setCacheControl( )
Helper method to generate a valid Cache-Control header from the options set in other methods
_setContent() protected ¶
_setContent( )
Sets the response body to an empty text if the status code is 204 or 304
_setContentLength() protected ¶
_setContentLength( )
Calculates the correct Content-Length and sets it as a header in the response Will not set the value if already set or if the output is compressed.
_setContentType() protected ¶
_setContentType( )
Formats the Content-Type header based on the configured contentType and charset the charset will only be set in the header if the response is of type text/*
_setCookies() protected ¶
_setCookies( )
Sets the cookies that have been added via static method CakeResponse::addCookie() before any other output is sent to the client. Will set the cookies in the order they have been set.
body() public ¶
body( string $content = null )
Buffers the response message to be sent if $content is null the current buffer is returned
Parameters
- string $content optional null
- the string message to be sent
Returns
current message buffer if $content param is passed as null
cache() public ¶
cache( string $since , string $time = '+1 day' )
Sets the correct headers to instruct the client to cache the response.
Parameters
- string $since
- a valid time since the response text has not been modified
- string $time optional '+1 day'
- a valid time for cache expiry
charset() public ¶
charset( string $charset = null )
Sets the response charset if $charset is null the current charset is returned
Parameters
- string $charset optional null
Returns
current charset
checkNotModified() public ¶
checkNotModified( CakeRequest $request )
Checks whether a response has not been modified according to the 'If-None-Match' (Etags) and 'If-Modified-Since' (last modification date) request headers headers. If the response is detected to be not modified, it is marked as so accordingly so the client can be informed of that.
In order to mark a response as not modified, you need to set at least the Last-Modified response header or a response etag to be compared with the request itself
Returns
whether the response was marked as not modified or not
compress() public ¶
compress( )
Sets the correct output buffering handler to send a compressed response. Responses will be compressed with zlib, if the extension is available.
Returns
false if client does not accept compressed responses or no handler is available, true otherwise
cookie() public ¶
cookie( $options = null )
Getter/Setter for cookie configs
This method acts as a setter/getter depending on the type of the argument. If the method is called with no arguments, it returns all configurations.
If the method is called with a string as argument, it returns either the given configuration if it is set, or null, if it's not set.
If the method is called with an array as argument, it will set the cookie configuration to the cookie container.
Parameters
- $options optional null
null to get all cookies, string for a specific cookie or array to set cookie.
Options (when setting a configuration)
- name: The Cookie name
- value: Value of the cookie
- expire: Time the cookie expires in
- path: Path the cookie applies to
- domain: Domain the cookie is for.
- secure: Is the cookie https?
- httpOnly: Is the cookie available in the client?
Examples
Getting all cookies
$this->cookie()Getting a certain cookie configuration
$this->cookie('MyCookie')Setting a cookie configuration
$this->cookie((array) $options)
Returns
disableCache() public ¶
disableCache( )
Sets the correct headers to instruct the client to not cache the response
download() public ¶
download( string $filename )
Sets the correct headers to instruct the browser to download the response as a file.
Parameters
- string $filename
- the name of the file as the browser will download the response
etag() public ¶
etag( string $tag = null , boolean $weak = false )
Sets the response Etag, Etags are a strong indicative that a response can be cached by a HTTP client. A bad way of generaing Etags is creating a hash of the response output, instead generate a unique hash of the unique components that identifies a request, such as a modification time, a resource Id, and anything else you consider it makes it unique.
Second parameter is used to instuct clients that the content has changed, but sematicallly, it can be used as the same thing. Think for instance of a page with a hit counter, two different page views are equivalent, but they differ by a few bytes. This leaves off to the Client the decision of using or not the cached page.
If no parameters are passed, current Etag header is returned.
Parameters
- string $tag optional null
- $hash the unique has that identifies this resposnse
- boolean $weak optional false
whether the response is semantically the same as other with th same hash or not
Returns
expires() public ¶
expires( string|DateTime $time = null )
Sets the Expires header for the response by taking an expiration time If called with no parameters it will return the current Expires value
Examples:
$response->expires('now') Will Expire the response cache now
$response->expires(new DateTime('+1 day')) Will set the expiration in next 24 hours
$response->expires() Will return the current expiration header value
Parameters
- string|DateTime $time optional null
Returns
getMimeType() public ¶
getMimeType( string $alias )
Returns the mime type definition for an alias
e.g getMimeType('pdf'); // returns 'application/pdf'
Parameters
- string $alias
- the content type alias to map
Returns
string mapped mime type or false if $alias is not mapped
header() public ¶
header( mixed $header = null , mixed $value = null )
Buffers a header string to be sent Returns the complete list of buffered headers
Single header
e.g header('Location', 'http://example.com');
Multiple headers
e.g header(array('Location' => 'http://example.com', 'X-Extra' => 'My header'));
String header
e.g header('WWW-Authenticate: Negotiate');
Array of string headers
e.g header(array('WWW-Authenticate: Negotiate', 'Content-type: application/pdf'));
Multiple calls for setting the same header name will have the same effect as setting the header once
with the last value sent for it
e.g header('WWW-Authenticate: Negotiate'); header('WWW-Authenticate: Not-Negotiate');
will have the same effect as only doing header('WWW-Authenticate: Not-Negotiate');
Parameters
- mixed $header optional null
$header. An array of header strings or a single header string - an associative array of "header name" => "header value" is also accepted - an array of string headers is also accepted
- mixed $value optional null
- $value. The header value.
Returns
list of headers to be sent
httpCodes() public ¶
httpCodes( mixed $code = null )
Queries & sets valid HTTP response codes & messages.
Parameters
- mixed $code optional null
If $code is an integer, then the corresponding code/message is returned if it exists, null if it does not exist. If $code is an array, then the 'code' and 'message' keys of each nested array are added to the default HTTP codes. Example:
httpCodes(404); // returns array(404 => 'Not Found') httpCodes(array( 701 => 'Unicorn Moved', 800 => 'Unexpected Minotaur' )); // sets these new values, and returns true
Returns
associative array of the HTTP codes as keys, and the message strings as values, or null of the given $code does not exist.
length() public ¶
length( $bytes = null )
Sets the Content-Length header for the response If called with no arguments returns the last Content-Length set
Returns
mapType() public ¶
mapType( mixed $ctype )
Maps a content-type back to an alias
e.g mapType('application/pdf'); // returns 'pdf'
Parameters
- mixed $ctype
- Either a string content type to map, or an array of types.
Returns
Aliases for the types provided.
maxAge() public ¶
maxAge( integer $seconds = null )
Sets the Cache-Control max-age directive. The max-age is the number of seconds after which the response should no longer be considered a good candidate to be fetched from the local (client) cache. If called with no parameters, this function will return the current max-age value if any
Parameters
- integer $seconds optional null
- if null, the method will return the current max-age value
Returns
modified() public ¶
modified( string|DateTime $time = null )
Sets the Last-Modified header for the response by taking an modification time If called with no parameters it will return the current Last-Modified value
Examples:
$response->modified('now') Will set the Last-Modified to the current time
$response->modified(new DateTime('+1 day')) Will set the modification date in the past 24 hours
$response->modified() Will return the current Last-Modified header value
Parameters
- string|DateTime $time optional null
Returns
mustRevalidate() public ¶
mustRevalidate( integer $enable = null )
Sets the Cache-Control must-revalidate directive. must-revalidate indicates that the response should not be served stale by a cache under any cirumstance without first revalidating with the origin. If called with no parameters, this function will return wheter must-revalidate is present.
Parameters
- integer $enable optional null
$seconds if null, the method will return the current must-revalidate value
Returns
notModified() public ¶
notModified( )
Sets the response as Not Modified by removing any body contents setting the status code to "304 Not Modified" and removing all conflicting headers
outputCompressed() public ¶
outputCompressed( )
Returns whether the resulting output will be compressed by PHP
Returns
protocol() public ¶
protocol( $protocol = null )
Sets the protocol to be used when sending the response. Defaults to HTTP/1.1 If called with no arguments, it will return the current configured protocol
Returns
protocol to be used for sending response
send() public ¶
send( )
Sends the complete response to the client including headers and message body. Will echo out the content in the response body.
sharable() public ¶
sharable( boolean $public = null , integer $time = null )
Sets whether a response is eligible to be cached by intermediate proxies
This method controls the public or private directive in the Cache-Control
header
Parameters
- boolean $public optional null
if set to true, the Cache-Control header will be set as public if set to false, the response will be set to private if no value is provided, it will return whether the response is sharable or not
- integer $time optional null
- time in seconds after which the response should no longer be considered fresh
Returns
sharedMaxAge() public ¶
sharedMaxAge( integer $seconds = null )
Sets the Cache-Control s-maxage directive. The max-age is the number of seconds after which the response should no longer be considered a good candidate to be fetched from a shared cache (like in a proxy server). If called with no parameters, this function will return the current max-age value if any
Parameters
- integer $seconds optional null
- if null, the method will return the current s-maxage value
Returns
statusCode() public ¶
statusCode( integer $code = null )
Sets the HTTP status code to be sent if $code is null the current code is returned
Parameters
- integer $code optional null
Returns
current status code
Throws
type() public ¶
type( string $contentType = null )
Sets the response content type. It can be either a file extension which will be mapped internally to a mime-type or a string representing a mime-type if $contentType is null the current content type is returned if $contentType is an associative array, it will be stored as a content type definition
Setting the content type
e.g type('jpg');
Returning the current content type
e.g type();
Storing a content type definition
e.g type(array('keynote' => 'application/keynote'));
Replacing a content type definition
e.g type(array('jpg' => 'text/plain'));
Parameters
- string $contentType optional null
Returns
current content type or false if supplied an invalid content type
vary() public ¶
vary( string|array $cacheVariances = null )
Sets the Vary header for the response, if an array is passed, values will be imploded into a comma separated string. If no parameters are passed, then an array with the current Vary header value is returned
Parameters
- string|array $cacheVariances optional null
a single Vary string or a array containig the list for variances.
Returns
Properties detail
$_cacheDirectives ¶
Holds all the cache directives that will be converted into headers when sending the request
array()
$_contentType ¶
Content type to send. This can be an 'extension' that will be transformed using the $_mimetypes array or a complete mime-type
'text/html'
$_mimeTypes ¶
Holds known mime type mappings
array( 'ai' => 'application/postscript', 'bcpio' => 'application/x-bcpio', 'bin' => 'application/octet-stream', 'ccad' => 'application/clariscad', 'cdf' => 'application/x-netcdf', 'class' => 'application/octet-stream', 'cpio' => 'application/x-cpio', 'cpt' => 'application/mac-compactpro', 'csh' => 'application/x-csh', 'csv' => array('text/csv', 'application/vnd.ms-excel', 'text/plain'), 'dcr' => 'application/x-director', 'dir' => 'application/x-director', 'dms' => 'application/octet-stream', 'doc' => 'application/msword', 'drw' => 'application/drafting', 'dvi' => 'application/x-dvi', 'dwg' => 'application/acad', 'dxf' => 'application/dxf', 'dxr' => 'application/x-director', 'eot' => 'application/vnd.ms-fontobject', 'eps' => 'application/postscript', 'exe' => 'application/octet-stream', 'ez' => 'application/andrew-inset', 'flv' => 'video/x-flv', 'gtar' => 'application/x-gtar', 'gz' => 'application/x-gzip', 'bz2' => 'application/x-bzip', '7z' => 'application/x-7z-compressed', 'hdf' => 'application/x-hdf', 'hqx' => 'application/mac-binhex40', 'ico' => 'image/vnd.microsoft.icon', 'ips' => 'application/x-ipscript', 'ipx' => 'application/x-ipix', 'js' => 'text/javascript', 'latex' => 'application/x-latex', 'lha' => 'application/octet-stream', 'lsp' => 'application/x-lisp', 'lzh' => 'application/octet-stream', 'man' => 'application/x-troff-man', 'me' => 'application/x-troff-me', 'mif' => 'application/vnd.mif', 'ms' => 'application/x-troff-ms', 'nc' => 'application/x-netcdf', 'oda' => 'application/oda', 'otf' => 'font/otf', 'pdf' => 'application/pdf', 'pgn' => 'application/x-chess-pgn', 'pot' => 'application/mspowerpoint', 'pps' => 'application/mspowerpoint', 'ppt' => 'application/mspowerpoint', 'ppz' => 'application/mspowerpoint', 'pre' => 'application/x-freelance', 'prt' => 'application/pro_eng', 'ps' => 'application/postscript', 'roff' => 'application/x-troff', 'scm' => 'application/x-lotusscreencam', 'set' => 'application/set', 'sh' => 'application/x-sh', 'shar' => 'application/x-shar', 'sit' => 'application/x-stuffit', 'skd' => 'application/x-koan', 'skm' => 'application/x-koan', 'skp' => 'application/x-koan', 'skt' => 'application/x-koan', 'smi' => 'application/smil', 'smil' => 'application/smil', 'sol' => 'application/solids', 'spl' => 'application/x-futuresplash', 'src' => 'application/x-wais-source', 'step' => 'application/STEP', 'stl' => 'application/SLA', 'stp' => 'application/STEP', 'sv4cpio' => 'application/x-sv4cpio', 'sv4crc' => 'application/x-sv4crc', 'svg' => 'image/svg+xml', 'svgz' => 'image/svg+xml', 'swf' => 'application/x-shockwave-flash', 't' => 'application/x-troff', 'tar' => 'application/x-tar', 'tcl' => 'application/x-tcl', 'tex' => 'application/x-tex', 'texi' => 'application/x-texinfo', 'texinfo' => 'application/x-texinfo', 'tr' => 'application/x-troff', 'tsp' => 'application/dsptype', 'ttf' => 'font/ttf', 'unv' => 'application/i-deas', 'ustar' => 'application/x-ustar', 'vcd' => 'application/x-cdlink', 'vda' => 'application/vda', 'xlc' => 'application/vnd.ms-excel', 'xll' => 'application/vnd.ms-excel', 'xlm' => 'application/vnd.ms-excel', 'xls' => 'application/vnd.ms-excel', 'xlw' => 'application/vnd.ms-excel', 'zip' => 'application/zip', 'aif' => 'audio/x-aiff', 'aifc' => 'audio/x-aiff', 'aiff' => 'audio/x-aiff', 'au' => 'audio/basic', 'kar' => 'audio/midi', 'mid' => 'audio/midi', 'midi' => 'audio/midi', 'mp2' => 'audio/mpeg', 'mp3' => 'audio/mpeg', 'mpga' => 'audio/mpeg', 'ogg' => 'audio/ogg', 'oga' => 'audio/ogg', 'spx' => 'audio/ogg', 'ra' => 'audio/x-realaudio', 'ram' => 'audio/x-pn-realaudio', 'rm' => 'audio/x-pn-realaudio', 'rpm' => 'audio/x-pn-realaudio-plugin', 'snd' => 'audio/basic', 'tsi' => 'audio/TSP-audio', 'wav' => 'audio/x-wav', 'aac' => 'audio/aac', 'asc' => 'text/plain', 'c' => 'text/plain', 'cc' => 'text/plain', 'css' => 'text/css', 'etx' => 'text/x-setext', 'f' => 'text/plain', 'f90' => 'text/plain', 'h' => 'text/plain', 'hh' => 'text/plain', 'html' => array('text/html', '*/*'), 'htm' => array('text/html', '*/*'), 'ics' => 'text/calendar', 'm' => 'text/plain', 'rtf' => 'text/rtf', 'rtx' => 'text/richtext', 'sgm' => 'text/sgml', 'sgml' => 'text/sgml', 'tsv' => 'text/tab-separated-values', 'tpl' => 'text/template', 'txt' => 'text/plain', 'text' => 'text/plain', 'xml' => array('application/xml', 'text/xml'), 'avi' => 'video/x-msvideo', 'fli' => 'video/x-fli', 'mov' => 'video/quicktime', 'movie' => 'video/x-sgi-movie', 'mpe' => 'video/mpeg', 'mpeg' => 'video/mpeg', 'mpg' => 'video/mpeg', 'qt' => 'video/quicktime', 'viv' => 'video/vnd.vivo', 'vivo' => 'video/vnd.vivo', 'ogv' => 'video/ogg', 'webm' => 'video/webm', 'mp4' => 'video/mp4', 'gif' => 'image/gif', 'ief' => 'image/ief', 'jpe' => 'image/jpeg', 'jpeg' => 'image/jpeg', 'jpg' => 'image/jpeg', 'pbm' => 'image/x-portable-bitmap', 'pgm' => 'image/x-portable-graymap', 'png' => 'image/png', 'pnm' => 'image/x-portable-anymap', 'ppm' => 'image/x-portable-pixmap', 'ras' => 'image/cmu-raster', 'rgb' => 'image/x-rgb', 'tif' => 'image/tiff', 'tiff' => 'image/tiff', 'xbm' => 'image/x-xbitmap', 'xpm' => 'image/x-xpixmap', 'xwd' => 'image/x-xwindowdump', 'ice' => 'x-conference/x-cooltalk', 'iges' => 'model/iges', 'igs' => 'model/iges', 'mesh' => 'model/mesh', 'msh' => 'model/mesh', 'silo' => 'model/mesh', 'vrml' => 'model/vrml', 'wrl' => 'model/vrml', 'mime' => 'www/mime', 'pdb' => 'chemical/x-pdb', 'xyz' => 'chemical/x-pdb', 'javascript' => 'text/javascript', 'json' => 'application/json', 'form' => 'application/x-www-form-urlencoded', 'file' => 'multipart/form-data', 'xhtml' => array('application/xhtml+xml', 'application/xhtml', 'text/xhtml'), 'xhtml-mobile' => 'application/vnd.wap.xhtml+xml', 'rss' => 'application/rss+xml', 'atom' => 'application/atom+xml', 'amf' => 'application/x-amf', 'wap' => array('text/vnd.wap.wml', 'text/vnd.wap.wmlscript', 'image/vnd.wap.wbmp'), 'wml' => 'text/vnd.wap.wml', 'wmlscript' => 'text/vnd.wap.wmlscript', 'wbmp' => 'image/vnd.wap.wbmp', )
$_statusCodes ¶
Holds HTTP response statuses
array( 100 => 'Continue', 101 => 'Switching Protocols', 200 => 'OK', 201 => 'Created', 202 => 'Accepted', 203 => 'Non-Authoritative Information', 204 => 'No Content', 205 => 'Reset Content', 206 => 'Partial Content', 300 => 'Multiple Choices', 301 => 'Moved Permanently', 302 => 'Found', 303 => 'See Other', 304 => 'Not Modified', 305 => 'Use Proxy', 307 => 'Temporary Redirect', 400 => 'Bad Request', 401 => 'Unauthorized', 402 => 'Payment Required', 403 => 'Forbidden', 404 => 'Not Found', 405 => 'Method Not Allowed', 406 => 'Not Acceptable', 407 => 'Proxy Authentication Required', 408 => 'Request Time-out', 409 => 'Conflict', 410 => 'Gone', 411 => 'Length Required', 412 => 'Precondition Failed', 413 => 'Request Entity Too Large', 414 => 'Request-URI Too Large', 415 => 'Unsupported Media Type', 416 => 'Requested range not satisfiable', 417 => 'Expectation Failed', 500 => 'Internal Server Error', 501 => 'Not Implemented', 502 => 'Bad Gateway', 503 => 'Service Unavailable', 504 => 'Gateway Time-out' )