Detailed Description
The QHttpHeader class contains header information for HTTP.
In most cases you should use the more specialized derivatives of
this class, QHttpResponseHeader and QHttpRequestHeader, rather
than directly using QHttpHeader.
QHttpHeader provides the HTTP header fields. A HTTP header field
consists of a name followed by a colon, a single space, and the
field value. (See RFC 1945.) Field names are case-insensitive. A
typical header field looks like this:
content-type: text/html
In the API the header field name is called the "key" and the
content is called the "value". You can get and set a header
field's value by using its key with value() and setValue(), e.g.
header.setValue( "content-type", "text/html" );
QString contentType = header.value( "content-type" );
Some fields are so common that getters and setters are provided
for them as a convenient alternative to using value() and
setValue(), e.g. contentLength() and contentType(),
setContentLength() and setContentType().
Each header key has a single value associated with it. If you
set the value for a key which already exists the previous value
will be discarded.
See also QHttpRequestHeader, QHttpResponseHeader, and Input/Output and Networking.
Member Function Documentation
Constructs an empty HTTP header.
Constructs a copy of header.
Constructs a HTTP header for str.
This constructor parses the string str for header fields and
adds this information. The str should consist of one or more
"\r\n" delimited lines; each of these lines should have the format
key, colon, space, value.
Destructor.
uint QHttpHeader::contentLength () const
Returns the value of the special HTTP header field content-length.
See also setContentLength() and hasContentLength().
QString QHttpHeader::contentType () const
Returns the value of the special HTTP header field content-type.
See also setContentType() and hasContentType().
bool QHttpHeader::hasContentLength () const
Returns TRUE if the header has an entry for the special HTTP
header field content-length; otherwise returns FALSE.
See also contentLength() and setContentLength().
bool QHttpHeader::hasContentType () const
Returns TRUE if the header has an entry for the the special HTTP
header field content-type; otherwise returns FALSE.
See also contentType() and setContentType().
bool QHttpHeader::hasKey ( const QString & key ) const
Returns TRUE if the HTTP header has an entry with the given key; otherwise returns FALSE.
See also value(), setValue(), and keys().
bool QHttpHeader::isValid () const
Returns TRUE if the HTTP header is valid; otherwise returns FALSE.
A QHttpHeader is invalid if it was created by parsing a malformed string.
QStringList QHttpHeader::keys () const
Returns a list of the keys in the HTTP header.
See also hasKey().
int QHttpHeader::majorVersion () const [pure virtual]
Returns the major protocol-version of the HTTP header.
Reimplemented in QHttpResponseHeader and QHttpRequestHeader.
int QHttpHeader::minorVersion () const [pure virtual]
Returns the minor protocol-version of the HTTP header.
Reimplemented in QHttpResponseHeader and QHttpRequestHeader.
Assigns h and returns a reference to this http header.
void QHttpHeader::removeValue ( const QString & key )
Removes the entry with the key key from the HTTP header.
See also value() and setValue().
void QHttpHeader::setContentLength ( int len )
Sets the value of the special HTTP header field content-length
to len.
See also contentLength() and hasContentLength().
void QHttpHeader::setContentType ( const QString & type )
Sets the value of the special HTTP header field content-type to
type.
See also contentType() and hasContentType().
Example: network/archivesearch/archivedialog.ui.h.
void QHttpHeader::setValue ( const QString & key, const QString & value )
Sets the value of the entry with the key to value.
If no entry with key exists, a new entry with the given key
and value is created. If an entry with the key already
exists, its value is discarded and replaced with the given value.
See also value(), hasKey(), and removeValue().
Example: network/archivesearch/archivedialog.ui.h.
QString QHttpHeader::toString () const [virtual]
Returns a string representation of the HTTP header.
The string is suitable for use by the constructor that takes a
QString. It consists of lines with the format: key, colon, space,
value, "\r\n".
QString QHttpHeader::value ( const QString & key ) const
Returns the value for the entry with the given key. If no entry
has this key, an empty string is returned.
See also setValue(), removeValue(), hasKey(), and keys().
This file is part of the Qt toolkit.
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