Gets all header fields from a CFHTTPMessage object.


func CFHTTPMessageCopyAllHeaderFields(_ message: CFHTTPMessage) -> Unmanaged<CFDictionary>?



The message to examine.

Return Value

A CFDictionaryRef object containing keys and values that are CFStringRef objects, where the key is the header fieldname and the dictionary value is the header field’s value. Returns NULL if the header fields could not be copied. Ownership follows the The Create Rule.


HTTP headers are case insensitive. To simplify your code, certain header field names are canonicalized into their standard form. For example, if the server sends a content-length header, it is automatically adjusted to be Content-Length.

The returned dictionary of headers is configured to be case-preserving during the set operation (unless the key already exists with a different case), and case-insensitive when looking up keys.

For example, if you set the header X-foo, and then later set the header X-Foo, the dictionary’s key will be X-foo, but the value will taken from the X-Foo header.

See Also

HTTP Messages

class CFHTTPMessage

An opaque reference representing an HTTP message.

func CFHTTPMessageApplyCredentialDictionary(CFHTTPMessage, CFHTTPAuthentication, CFDictionary, UnsafeMutablePointer<CFStreamError>?) -> Bool

Use a dictionary containing authentication credentials to perform the authentication method specified by a CFHTTPAuthentication object.

func CFHTTPMessageCopyBody(CFHTTPMessage) -> Unmanaged<CFData>?

Gets the body from a CFHTTPMessage object.

func CFHTTPMessageCopyHeaderFieldValue(CFHTTPMessage, CFString) -> Unmanaged<CFString>?

Gets the value of a header field from a CFHTTPMessage object.

func CFHTTPMessageCopyRequestMethod(CFHTTPMessage) -> Unmanaged<CFString>?

Gets the request method from a CFHTTPMessage object.

func CFHTTPMessageCopyVersion(CFHTTPMessage) -> Unmanaged<CFString>

Gets the HTTP version from a CFHTTPMessage object.

func CFHTTPMessageCreateEmpty(CFAllocator?, Bool) -> Unmanaged<CFHTTPMessage>

Creates and returns a new, empty CFHTTPMessage object.

func CFHTTPMessageGetResponseStatusCode(CFHTTPMessage) -> CFIndex

Gets the status code from a CFHTTPMessage object representing an HTTP response.

func CFHTTPMessageGetTypeID() -> CFTypeID

Returns the Core Foundation type identifier for the CFHTTPMessage opaque type.

func CFHTTPMessageIsHeaderComplete(CFHTTPMessage) -> Bool

Determines whether a message header is complete.

func CFHTTPMessageIsRequest(CFHTTPMessage) -> Bool

Returns a Boolean indicating whether the HTTP message is a request or a response.

func CFHTTPMessageSetBody(CFHTTPMessage, CFData)

Sets the body of a CFHTTPMessage object.

func CFHTTPMessageSetHeaderFieldValue(CFHTTPMessage, CFString, CFString?)

Sets the value of a header field in an HTTP message.

let kCFHTTPVersion1_0: CFString

Specifies HTTP version 1.0.

let kCFHTTPVersion1_1: CFString

Specifies HTTP version 1.1.