Class Response
Responses contain the response text, status and headers of a HTTP response.
There are external packages such as fig/http-message-util
that provide HTTP
status code constants. These can be used with any method that accepts or
returns a status code integer. Keep in mind that these consants might
include status codes that are now allowed which will throw an
\InvalidArgumentException
.
Property Summary
-
$_cacheDirectives protected
array
Holds all the cache directives that will be converted into headers when sending the request
-
$_charset protected
string
The charset the response body is encoded with
-
$_cookies protected
Cake\Http\Cookie\CookieCollection
Collection of cookies to send to the client
-
$_file protected
SplFileInfo|null
File object for file to be read out as response
-
$_fileRange protected
array
File range. Used for requesting ranges of files.
-
$_mimeTypes protected
array
Holds type key to mime type mappings for known mime types.
-
$_reasonPhrase protected
string
Reason Phrase
-
$_status protected
int
Status code to send to the client
-
$_statusCodes protected
string[]
Allowed HTTP status codes and their default description.
-
$_streamMode protected
string
Stream mode options.
-
$_streamTarget protected
string|resource
Stream target or resource object.
-
$headerNames protected
array
Map of normalized header name to original name used to register header.
-
$headers protected
array
List of all registered headers, as key => array of values.
Method Summary
-
__construct() public
Constructor
-
__debugInfo() public
Returns an array that can be used to describe the internal state of this object.
-
__toString() public
String conversion. Fetches the response body as a string. Does not send headers. If body is a callable, a blank string is returned.
-
_clearHeader() protected
Clear header
-
_createStream() protected
Creates the stream object.
-
_fileRange() protected
Apply a file range to a file and set the end offset.
-
_getUTCDate() protected
Returns a DateTime object initialized at the $time param and using UTC as timezone
-
_setCacheControl() protected
Helper method to generate a valid Cache-Control header from the options set in other methods
-
_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/*
-
_setHeader() protected
Sets a header.
-
_setStatus() protected
Modifier for response status
-
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. If the response is detected to be not modified, it is marked as so accordingly so the client can be informed of that.
-
compress() public
Sets the correct output buffering handler to send a compressed response. Responses will be compressed with zlib, if the extension is available.
-
cors() public
Get a CorsBuilder instance for defining CORS headers.
-
getBody() public
Gets the body of the message.
-
getCharset() public
Returns the current charset.
-
getCookie() public
Read a single cookie from the response.
-
getCookieCollection() public
Get the CookieCollection from the response
-
getCookies() public
Get all cookies in the response.
-
getFile() public
Get the current file if one exists.
-
getHeader() public
Retrieves a message header value by the given case-insensitive name.
-
getHeaderLine() public
Retrieves a comma-separated string of the values for a single header.
-
getHeaders() public
Retrieves all message headers.
-
getMimeType() public
Returns the mime type definition for an alias
-
getProtocolVersion() public
Retrieves the HTTP protocol version as a string.
-
getReasonPhrase() public
Gets the response reason phrase associated with the status code.
-
getStatusCode() public
Gets the response status code.
-
getType() public
Returns the current content type.
-
hasHeader() public
Checks if a header exists by the given case-insensitive name.
-
mapType() public
Maps a content-type back to an alias
-
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
-
outputCompressed() public
Returns whether the resulting output will be compressed by PHP
-
resolveType() protected
Translate and validate content-types.
-
setTypeMap() public
Sets a content type definition into the map.
-
validateFile() protected
Validate a file path is a valid response body.
-
withAddedHeader() public
Return an instance with the specified header appended with the given value.
-
withAddedLink() public
Create a new response with the Link header set.
-
withBody() public
Return an instance with the specified message body.
-
withCache() public
Create a new instance with the headers to enable client caching.
-
withCharset() public
Get a new instance with an updated charset.
-
withCookie() public
Create a new response with a cookie set.
-
withCookieCollection() public
Get a new instance with provided cookie collection.
-
withDisabledCache() public
Create a new instance with headers to instruct the client to not cache the response
-
withDownload() public
Create a new instance with the Content-Disposition header set.
-
withEtag() public
Create a new instance with the Etag header set.
-
withExpiredCookie() public
Create a new response with an expired cookie set.
-
withExpires() public
Create a new instance with the Expires header set.
-
withFile() public
Create a new instance that is based on a file.
-
withHeader() public
Return an instance with the provided header, replacing any existing values of any headers with the same case-insensitive name.
-
withLength() public
Create a new response with the Content-Length header set.
-
withLocation() public
Return an instance with an updated location header.
-
withMaxAge() public
Create an instance with Cache-Control max-age directive set.
-
withModified() public
Create a new instance with the Last-Modified header set.
-
withMustRevalidate() public
Create an instance with Cache-Control must-revalidate directive set.
-
withNotModified() public
Create a new instance as 'not modified'
-
withProtocolVersion() public
Return an instance with the specified HTTP protocol version.
-
withSharable() public
Create a new instace with the public/private Cache-Control directive set.
-
withSharedMaxAge() public
Create a new instance with the Cache-Control s-maxage directive.
-
withStatus() public
Return an instance with the specified status code and, optionally, reason phrase.
-
withStringBody() public
Convenience method to set a string into the response body
-
withType() public
Get an updated response with the content type set.
-
withVary() public
Create a new instance with the Vary header set.
-
withoutHeader() public
Return an instance without the specified header.
Method Detail
__construct() ¶ public
__construct(array $options = [])
Constructor
Parameters
-
array
$options optional list of parameters to setup the response. Possible values are:
Throws
InvalidArgumentException
__debugInfo() ¶ public
__debugInfo(): array
Returns an array that can be used to describe the internal state of this object.
Returns
array
__toString() ¶ public
__toString(): string
String conversion. Fetches the response body as a string. Does not send headers. If body is a callable, a blank string is returned.
Returns
string
_clearHeader() ¶ protected
_clearHeader(string $header): void
Clear header
Parameters
-
string
$header Header key.
Returns
void
_fileRange() ¶ protected
_fileRange(SplFileInfo $file, string $httpRange): void
Apply a file range to a file and set the end offset.
If an invalid range is requested a 416 Status code will be used in the response.
Parameters
-
SplFileInfo
$file The file to set a range on.
-
string
$httpRange The range to use.
Returns
void
_getUTCDate() ¶ protected
_getUTCDate(string|intDateTimeInterface|null $time = null): DateTimeInterface
Returns a DateTime object initialized at the $time param and using UTC as timezone
Parameters
-
string|intDateTimeInterface|null
$time optional Valid time string or \DateTimeInterface instance.
Returns
DateTimeInterface
_setCacheControl() ¶ protected
_setCacheControl(): void
Helper method to generate a valid Cache-Control header from the options set in other methods
Returns
void
_setContentType() ¶ protected
_setContentType(string $type): void
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/*
Parameters
-
string
$type The type to set.
Returns
void
_setHeader() ¶ protected
_setHeader(string $header, string $value): void
Sets a header.
Parameters
-
string
$header Header key.
-
string
$value Header value.
Returns
void
_setStatus() ¶ protected
_setStatus(int $code, string $reasonPhrase = ''): void
Modifier for response status
Parameters
-
int
$code The status code to set.
-
string
$reasonPhrase optional The response reason phrase.
Returns
void
Throws
InvalidArgumentException
For invalid status code arguments.
checkNotModified() ¶ public
checkNotModified(Cake\Http\ServerRequest $request): bool
Checks whether a response has not been modified according to the 'If-None-Match' (Etags) and 'If-Modified-Since' (last modification date) request 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 etag response header before calling this method. Otherwise a comparison will not be possible.
Warning This method mutates the response in-place and should be avoided.
Parameters
-
Cake\Http\ServerRequest
$request Request object
Returns
bool
compress() ¶ public
compress(): bool
Sets the correct output buffering handler to send a compressed response. Responses will be compressed with zlib, if the extension is available.
Returns
bool
cors() ¶ public
cors(Cake\Http\ServerRequest $request): Cake\Http\CorsBuilder
Get a CorsBuilder instance for defining CORS headers.
This method allow multiple ways to setup the domains, see the examples
Full URI
cors($request, 'https://www.cakephp.org');
URI with wildcard
cors($request, 'https://*.cakephp.org');
Ignoring the requested protocol
cors($request, 'www.cakephp.org');
Any URI
cors($request, '*');
Whitelist of URIs
cors($request, ['http://www.cakephp.org', '*.google.com', 'https://myproject.github.io']);
Note The $allowedDomains
, $allowedMethods
, $allowedHeaders
parameters are deprecated.
Instead the builder object should be used.
Parameters
-
Cake\Http\ServerRequest
$request Request object
Returns
Cake\Http\CorsBuilder
getCookie() ¶ public
getCookie(string $name): array|null
Read a single cookie from the response.
This method provides read access to pending cookies. It will
not read the Set-Cookie
header if set.
Parameters
-
string
$name The cookie name you want to read.
Returns
array|null
getCookieCollection() ¶ public
getCookieCollection(): Cake\Http\Cookie\CookieCollection
Get the CookieCollection from the response
Returns
Cake\Http\Cookie\CookieCollection
getCookies() ¶ public
getCookies(): array
Get all cookies in the response.
Returns an associative array of cookie name => cookie data.
Returns
array
getFile() ¶ public
getFile(): SplFileInfo|null
Get the current file if one exists.
Returns
SplFileInfo|null
getHeader() ¶ public
getHeader(string $header): string[]
Retrieves a message header value by the given case-insensitive name.
This method returns an array of all the header values of the given case-insensitive header name.
If the header does not appear in the message, this method MUST return an empty array.
Parameters
-
string
$header Case-insensitive header field name.
Returns
string[]
getHeaderLine() ¶ public
getHeaderLine(string $name): string
Retrieves a comma-separated string of the values for a single header.
This method returns all of the header values of the given case-insensitive header name as a string concatenated together using a comma.
NOTE: Not all header values may be appropriately represented using comma concatenation. For such headers, use getHeader() instead and supply your own delimiter when concatenating.
If the header does not appear in the message, this method MUST return an empty string.
Parameters
-
string
$name Case-insensitive header field name.
Returns
string
getHeaders() ¶ public
getHeaders(): array
Retrieves all message headers.
The keys represent the header name as it will be sent over the wire, and each value is an array of strings associated with the header.
// Represent the headers as a string foreach ($message->getHeaders() as $name => $values) { echo $name . ": " . implode(", ", $values); }
// Emit headers iteratively: foreach ($message->getHeaders() as $name => $values) { foreach ($values as $value) { header(sprintf('%s: %s', $name, $value), false); } }
Returns
array
getMimeType() ¶ public
getMimeType(string $alias): string|array|false
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|array|false
getProtocolVersion() ¶ public
getProtocolVersion(): string
Retrieves the HTTP protocol version as a string.
The string MUST contain only the HTTP version number (e.g., "1.1", "1.0").
Returns
string
getReasonPhrase() ¶ public
getReasonPhrase(): string
Gets the response reason phrase associated with the status code.
Because a reason phrase is not a required element in a response status line, the reason phrase value MAY be null. Implementations MAY choose to return the default RFC 7231 recommended reason phrase (or those listed in the IANA HTTP Status Code Registry) for the response's status code.
Returns
string
Links
http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
getStatusCode() ¶ public
getStatusCode(): int
Gets the response status code.
The status code is a 3-digit integer result code of the server's attempt to understand and satisfy the request.
Returns
int
hasHeader() ¶ public
hasHeader(string $header): bool
Checks if a header exists by the given case-insensitive name.
Parameters
-
string
$header Case-insensitive header name.
Returns
bool
mapType() ¶ public
mapType(string|array $ctype): string|array|null
Maps a content-type back to an alias
e.g mapType('application/pdf'); // returns 'pdf'
Parameters
-
string|array
$ctype Either a string content type to map, or an array of types.
Returns
string|array|null
notModified() ¶ public
notModified(): void
Sets the response as Not Modified by removing any body contents setting the status code to "304 Not Modified" and removing all conflicting headers
Warning This method mutates the response in-place and should be avoided.
Returns
void
outputCompressed() ¶ public
outputCompressed(): bool
Returns whether the resulting output will be compressed by PHP
Returns
bool
resolveType() ¶ protected
resolveType(string $contentType): string
Translate and validate content-types.
Parameters
-
string
$contentType The content-type or type alias.
Returns
string
Throws
InvalidArgumentException
When an invalid content-type or alias is used.
setTypeMap() ¶ public
setTypeMap(string $type, string|array $mimeType): void
Sets a content type definition into the map.
E.g.: setTypeMap('xhtml', ['application/xhtml+xml', 'application/xhtml'])
This is needed for RequestHandlerComponent and recognition of types.
Parameters
-
string
$type Content type.
-
string|array
$mimeType Definition of the mime type.
Returns
void
validateFile() ¶ protected
validateFile(string $path): SplFileInfo
Validate a file path is a valid response body.
Parameters
-
string
$path The path to the file.
Returns
SplFileInfo
Throws
Cake\Http\Exception\NotFoundException
withAddedHeader() ¶ public
withAddedHeader(string $name, string|string[] $value): static
Return an instance with the specified header appended with the given value.
Existing values for the specified header will be maintained. The new value(s) will be appended to the existing list. If the header did not exist previously, it will be added.
This method MUST be implemented in such a way as to retain the immutability of the message, and MUST return an instance that has the new header and/or value.
Parameters
-
string
$name Case-insensitive header field name to add.
-
string|string[]
$value Header value(s).
Returns
static
Throws
Exception\InvalidArgumentException
For invalid header names or values.
withAddedLink() ¶ public
withAddedLink(string $url, array $options = []): static
Create a new response with the Link header set.
Examples
$response = $response->withAddedLink('http://example.com?page=1', ['rel' => 'prev'])
->withAddedLink('http://example.com?page=3', ['rel' => 'next']);
Will generate:
Link: <http://example.com?page=1>; rel="prev"
Link: <http://example.com?page=3>; rel="next"
Parameters
-
string
$url The LinkHeader url.
-
array
$options optional The LinkHeader params.
Returns
static
withBody() ¶ public
withBody(StreamInterface $body): static
Return an instance with the specified message body.
The body MUST be a StreamInterface object.
This method MUST be implemented in such a way as to retain the immutability of the message, and MUST return a new instance that has the new body stream.
Parameters
-
StreamInterface
$body Body.
Returns
static
Throws
Exception\InvalidArgumentException
When the body is not valid.
withCache() ¶ public
withCache(int|string $since, int|string $time = '+1 day'): static
Create a new instance with the headers to enable client caching.
Parameters
-
int|string
$since a valid time since the response text has not been modified
-
int|string
$time optional a valid time for cache expiry
Returns
static
withCharset() ¶ public
withCharset(string $charset): static
Get a new instance with an updated charset.
Parameters
-
string
$charset Character set string.
Returns
static
withCookie() ¶ public
withCookie(Cake\Http\Cookie\CookieInterface $cookie): static
Create a new response with a cookie set.
Example
// add a cookie object
$response = $response->withCookie(new Cookie('remember_me', 1));
Parameters
-
Cake\Http\Cookie\CookieInterface
$cookie cookie object
Returns
static
withCookieCollection() ¶ public
withCookieCollection(Cake\Http\Cookie\CookieCollection $cookieCollection): static
Get a new instance with provided cookie collection.
Parameters
-
Cake\Http\Cookie\CookieCollection
$cookieCollection Cookie collection to set.
Returns
static
withDisabledCache() ¶ public
withDisabledCache(): static
Create a new instance with headers to instruct the client to not cache the response
Returns
static
withDownload() ¶ public
withDownload(string $filename): static
Create a new instance with the Content-Disposition header set.
Parameters
-
string
$filename The name of the file as the browser will download the response
Returns
static
withEtag() ¶ public
withEtag(string $hash, bool $weak = false): static
Create a new instance with the Etag header set.
Etags are a strong indicative that a response can be cached by a HTTP client. A bad way of generating 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 that makes the response unique.
The second parameter is used to inform clients that the content has changed, but semantically it is equivalent to existing cached values. Consider a page with a hit counter, two different page views are equivalent, but they differ by a few bytes. This permits the Client to decide whether they should use the cached data.
Parameters
-
string
$hash The unique hash that identifies this response
-
bool
$weak optional Whether the response is semantically the same as other with the same hash or not. Defaults to false
Returns
static
withExpiredCookie() ¶ public
withExpiredCookie(Cake\Http\Cookie\CookieInterface $cookie): static
Create a new response with an expired cookie set.
Example
// add a cookie object
$response = $response->withExpiredCookie(new Cookie('remember_me'));
Parameters
-
Cake\Http\Cookie\CookieInterface
$cookie cookie object
Returns
static
withExpires() ¶ public
withExpires(string|intDateTimeInterface|null $time): static
Create a new instance with the Expires header set.
Examples:
// Will Expire the response cache now
$response->withExpires('now')
// Will set the expiration in next 24 hours
$response->withExpires(new DateTime('+1 day'))
Parameters
-
string|intDateTimeInterface|null
$time Valid time string or \DateTime instance.
Returns
static
withFile() ¶ public
withFile(string $path, array $options = []): static
Create a new instance that is based on a file.
This method will augment both the body and a number of related headers.
If $_SERVER['HTTP_RANGE']
is set, a slice of the file will be
returned instead of the entire file.
Options keys
- name: Alternate download name
- download: If
true
sets download header and forces file to be downloaded rather than displayed inline.
Parameters
-
string
$path Absolute path to file.
-
array
$options optional Options See above.
Returns
static
Throws
Cake\Http\Exception\NotFoundException
withHeader() ¶ public
withHeader(string $name, string|string[] $value): static
Return an instance with the provided header, replacing any existing values of any headers with the same case-insensitive name.
While header names are case-insensitive, the casing of the header will be preserved by this function, and returned from getHeaders().
This method MUST be implemented in such a way as to retain the immutability of the message, and MUST return an instance that has the new and/or updated header and value.
Parameters
-
string
$name Case-insensitive header field name.
-
string|string[]
$value Header value(s).
Returns
static
Throws
Exception\InvalidArgumentException
For invalid header names or values.
withLength() ¶ public
withLength(int|string $bytes): static
Create a new response with the Content-Length header set.
Parameters
-
int|string
$bytes Number of bytes
Returns
static
withLocation() ¶ public
withLocation(string $url): static
Return an instance with an updated location header.
If the current status code is 200, it will be replaced with 302.
Parameters
-
string
$url The location to redirect to.
Returns
static
withMaxAge() ¶ public
withMaxAge(int $seconds): static
Create an instance with Cache-Control max-age directive set.
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.
Parameters
-
int
$seconds The seconds a cached response can be considered valid
Returns
static
withModified() ¶ public
withModified(int|stringDateTimeInterface $time): static
Create a new instance with the Last-Modified header set.
Examples:
// Will Expire the response cache now
$response->withModified('now')
// Will set the expiration in next 24 hours
$response->withModified(new DateTime('+1 day'))
Parameters
-
int|stringDateTimeInterface
$time Valid time string or \DateTime instance.
Returns
static
withMustRevalidate() ¶ public
withMustRevalidate(bool $enable): static
Create an instance with Cache-Control must-revalidate directive set.
Sets the Cache-Control must-revalidate directive. must-revalidate indicates that the response should not be served stale by a cache under any circumstance without first revalidating with the origin.
Parameters
-
bool
$enable If boolean sets or unsets the directive.
Returns
static
withNotModified() ¶ public
withNotModified(): static
Create a new instance as 'not modified'
This will remove any body contents set the status code to "304" and removing headers that describe a response body.
Returns
static
withProtocolVersion() ¶ public
withProtocolVersion(string $version): static
Return an instance with the specified HTTP protocol version.
The version string MUST contain only the HTTP version number (e.g., "1.1", "1.0").
This method MUST be implemented in such a way as to retain the immutability of the message, and MUST return an instance that has the new protocol version.
Parameters
-
string
$version HTTP protocol version
Returns
static
withSharable() ¶ public
withSharable(bool $public, int|null $time = null): static
Create a new instace with the public/private Cache-Control directive set.
Parameters
-
bool
$public If set to true, the Cache-Control header will be set as public if set to false, the response will be set to private.
-
int|null
$time optional time in seconds after which the response should no longer be considered fresh.
Returns
static
withSharedMaxAge() ¶ public
withSharedMaxAge(int $seconds): static
Create a new instance with 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).
Parameters
-
int
$seconds The number of seconds for shared max-age
Returns
static
withStatus() ¶ public
withStatus(int $code, string $reasonPhrase = ''): static
Return an instance with the specified status code and, optionally, reason phrase.
If no reason phrase is specified, implementations MAY choose to default to the RFC 7231 or IANA recommended reason phrase for the response's status code.
This method MUST be implemented in such a way as to retain the immutability of the message, and MUST return an instance that has the updated status and reason phrase.
If the status code is 304 or 204, the existing Content-Type header will be cleared, as these response codes have no body.
There are external packages such as fig/http-message-util
that provide HTTP
status code constants. These can be used with any method that accepts or
returns a status code integer. However, keep in mind that these consants
might include status codes that are now allowed which will throw an
\InvalidArgumentException
.
Parameters
-
int
$code The 3-digit integer status code to set.
-
string
$reasonPhrase optional The reason phrase to use with the provided status code; if none is provided, implementations MAY use the defaults as suggested in the HTTP specification.
Returns
static
Throws
InvalidArgumentException
For invalid status code arguments.
Links
https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
withStringBody() ¶ public
withStringBody(string $string): static
Convenience method to set a string into the response body
Parameters
-
string
$string The string to be sent
Returns
static
withType() ¶ public
withType(string $contentType): static
Get an updated response with the content type set.
If you attempt to set the type on a 304 or 204 status code response, the content type will not take effect as these status codes do not have content-types.
Parameters
-
string
$contentType Either a file extension which will be mapped to a mime-type or a concrete mime-type.
Returns
static
withVary() ¶ public
withVary(string|array $cacheVariances): static
Create a new instance with the Vary header set.
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 A single Vary string or an array containing the list for variances.
Returns
static
withoutHeader() ¶ public
withoutHeader(string $name): static
Return an instance without the specified header.
Header resolution MUST be done without case-sensitivity.
This method MUST be implemented in such a way as to retain the immutability of the message, and MUST return an instance that removes the named header.
Parameters
-
string
$name Case-insensitive header field name to remove.
Returns
static
Property Detail
$_cacheDirectives ¶ protected
Holds all the cache directives that will be converted into headers when sending the request
Type
array
$_cookies ¶ protected
Collection of cookies to send to the client
Type
Cake\Http\Cookie\CookieCollection
$headerNames ¶ protected
Map of normalized header name to original name used to register header.
Type
array