qurl.3qt

linux下GUI编程工具qt的在线连接帮助手册

'\" t
.TH QUrl 3qt "11 October 2001" "Trolltech AS" \" -*- nroff -*-
.\" Copyright 1992-2001 Trolltech AS.  All rights reserved.  See the
.\" license file included in the distribution for a complete license
.\" statement.
.\"
.ad l
.nh
.SH NAME
QUrl \- URL parser and simplifies working with URLs
.PP
\fC#include <qurl.h>\fR
.PP
Inherited by QUrlOperator.
.PP
.SS "Public Members"
.in +1c
.ti -1c
.BI "\fBQUrl\fR ()"
.br
.ti -1c
.BI "\fBQUrl\fR ( const QString & url )"
.br
.ti -1c
.BI "\fBQUrl\fR ( const QUrl & url )"
.br
.ti -1c
.BI "\fBQUrl\fR ( const QUrl & url, const QString & relUrl, bool checkSlash = FALSE )"
.br
.ti -1c
.BI "virtual \fB~QUrl\fR ()"
.br
.ti -1c
.BI "QString \fBprotocol\fR () const"
.br
.ti -1c
.BI "virtual void \fBsetProtocol\fR ( const QString & protocol )"
.br
.ti -1c
.BI "QString \fBuser\fR () const"
.br
.ti -1c
.BI "virtual void \fBsetUser\fR ( const QString & user )"
.br
.ti -1c
.BI "bool \fBhasUser\fR () const"
.br
.ti -1c
.BI "QString \fBpassword\fR () const"
.br
.ti -1c
.BI "virtual void \fBsetPassword\fR ( const QString & pass )"
.br
.ti -1c
.BI "bool \fBhasPassword\fR () const"
.br
.ti -1c
.BI "QString \fBhost\fR () const"
.br
.ti -1c
.BI "virtual void \fBsetHost\fR ( const QString & host )"
.br
.ti -1c
.BI "bool \fBhasHost\fR () const"
.br
.ti -1c
.BI "int \fBport\fR () const"
.br
.ti -1c
.BI "virtual void \fBsetPort\fR ( int port )"
.br
.ti -1c
.BI "bool \fBhasPort\fR () const"
.br
.ti -1c
.BI "QString \fBpath\fR ( bool correct = TRUE ) const"
.br
.ti -1c
.BI "virtual void \fBsetPath\fR ( const QString & path )"
.br
.ti -1c
.BI "bool \fBhasPath\fR () const"
.br
.ti -1c
.BI "virtual void \fBsetEncodedPathAndQuery\fR ( const QString & pathAndQuery )"
.br
.ti -1c
.BI "QString \fBencodedPathAndQuery\fR ()"
.br
.ti -1c
.BI "virtual void \fBsetQuery\fR ( const QString & txt )"
.br
.ti -1c
.BI "QString \fBquery\fR () const"
.br
.ti -1c
.BI "QString \fBref\fR () const"
.br
.ti -1c
.BI "virtual void \fBsetRef\fR ( const QString & txt )"
.br
.ti -1c
.BI "bool \fBhasRef\fR () const"
.br
.ti -1c
.BI "bool \fBisValid\fR () const"
.br
.ti -1c
.BI "bool \fBisLocalFile\fR () const"
.br
.ti -1c
.BI "virtual void \fBaddPath\fR ( const QString & pa )"
.br
.ti -1c
.BI "virtual void \fBsetFileName\fR ( const QString & name )"
.br
.ti -1c
.BI "QString \fBfileName\fR () const"
.br
.ti -1c
.BI "QString \fBdirPath\fR () const"
.br
.ti -1c
.BI "QUrl & \fBoperator=\fR ( const QUrl & url )"
.br
.ti -1c
.BI "QUrl & \fBoperator=\fR ( const QString & url )"
.br
.ti -1c
.BI "bool \fBoperator==\fR ( const QUrl & url ) const"
.br
.ti -1c
.BI "bool \fBoperator==\fR ( const QString & url ) const"
.br
.ti -1c
.BI "\fBoperator QString\fR () const"
.br
.ti -1c
.BI "virtual QString \fBtoString\fR ( bool encodedPath = FALSE, bool forcePrependProtocol = TRUE ) const"
.br
.ti -1c
.BI "virtual bool \fBcdUp\fR ()"
.br
.in -1c
.SS "Static Public Members"
.in +1c
.ti -1c
.BI "void \fBdecode\fR ( QString & url )"
.br
.ti -1c
.BI "void \fBencode\fR ( QString & url )"
.br
.ti -1c
.BI "bool \fBisRelativeUrl\fR ( const QString & url )"
.br
.in -1c
.SS "Protected Members"
.in +1c
.ti -1c
.BI "virtual void \fBreset\fR ()"
.br
.ti -1c
.BI "virtual bool \fBparse\fR ( const QString & url )"
.br
.in -1c
.SH DESCRIPTION
The QUrl class provides a URL parser and simplifies working with URLs.
.PP
The QUrl class is provided for simple work with URLs. It can parse, decode, encode, etc.
.PP
QUrl works with the decoded path and encoded query in turn.
.PP
Example:
.PP
\fChttp://www.trolltech.com:80/cgi-bin/test%20me.pl?cmd=Hello%20you\fR
.PP
<center>.nf
.TS
l - l. Function Returns protocol() "http" host() "www.trolltech.com" port() 80 path() "cgi-bin" fileName() "testme.pl" query()
.TE
.fi
</center>
.PP
Example:
.PP
http://doc.trolltech.com/qdockarea.html#lines
.PP
<center>.nf
.TS
l - l. Function Returns protocol() "http" host() "doc.trolltech.com" fileName() "qdockarea.html" ref()
.TE
.fi
</center>
.PP
The individual parts of a URL can be set with setProtocol(), setHost(), setPort(), setPath(), setFileName(), setRef() and setQuery(). A URL could contain, for example, an ftp address which requires a user name and password; these can be set with setUser() and setPassword().
.PP
Because path is always encoded internally you must not use "%00" in the path, although this it is okay (but not recommended) for the query.
.PP
QUrl is normally used like this:
.PP
.nf
.br
  QUrl u( "http://www.trolltech.com" );
.br
  // or
.br
  QUrl u( "file:/home/myself/Mail", "Inbox" );
.br
.fi
.PP
You can then access and manipulate the various parts of the URL.
.PP
To make it easy to work with QUrls and QStrings, QUrl implements the necessary cast and assignment operators so you can do following:
.PP
.nf
.br
  QUrl u( "http://www.trolltech.com" );
.br
  QString s = u;
.br
  // or
.br
  QString s( "http://www.trolltech.com" );
.br
  QUrl u( s );
.br
.fi
.PP
Use the static functions, encode() and decode() to encode or decode a URL in a string. (They operate on the string in-place.) The isRelativeUrl() static function returns TRUE if the given string is a relative URL.
.PP
If you want to use an URL to work on a hierarchical structure (e.g. a local or remote filesystem), you might want to use the subclass QUrlOperator.
.PP
See also QUrlOperator, Input/Output and Networking and Miscellaneous Classes.
.SH MEMBER FUNCTION DOCUMENTATION
.SH "QUrl::QUrl ()"
Constructs an empty URL that is invalid.
.SH "QUrl::QUrl ( const QString & url )"
Constructs a URL by parsing the string \fIurl\fR.
.PP
If you pass a string like "/home/qt", the "file" protocol is assumed.
.SH "QUrl::QUrl ( const QUrl & url )"
Copy constructor. Copies the data of \fIurl\fR.
.SH "QUrl::QUrl ( const QUrl & url, const QString & relUrl, bool checkSlash = FALSE )"
Constructs an URL taking \fIurl\fR as the base (context) and \fIrelUrl\fR as a relative URL to \fIurl\fR. If \fIrelUrl\fR is not relative, \fIrelUrl\fR is taken as the new URL.
.PP
For example, the path of
.PP
.nf
.br
  QUrl u( "ftp://ftp.trolltech.com/qt/source", "qt-2.1.0.tar.gz" );
.br
.fi
will be "/qt/srource/qt-2.1.0.tar.gz".
.PP
On the other hand,
.PP
.nf
.br
  QUrl u( "ftp://ftp.trolltech.com/qt/source", "/usr/local" );
.br
.fi
will result in a new URL, "ftp://ftp.trolltech.com/usr/local", because "/usr/local" isn't relative.
.PP
Similarly,
.PP
.nf
.br
  QUrl u( "ftp://ftp.trolltech.com/qt/source", "file:/usr/local" );
.br
.fi
will result in a new URL, with "/usr/local" as the path and "file" as the protocol.
.PP
Normally it is expected that the path of \fIurl\fR points to a directory, even if the path has no slash at the end. But if you want the constructor to handle the last part of the path as a file name if there is no slash at the end, and to let it be replaced by the file name of \fIrelUrl\fR (if it contains one), set \fIcheckSlash\fR to TRUE.
.SH "QUrl::~QUrl ()\fC [virtual]\fR"
Destructor.
.SH "void QUrl::addPath ( const QString & pa )\fC [virtual]\fR"
Adds the path \fIpa\fR to the path of the URL.
.PP
See also setPath() and hasPath().
.SH "bool QUrl::cdUp ()\fC [virtual]\fR"
Changes the directory to one directory up.
.PP
See also setPath().
.SH "void QUrl::decode ( QString & url )\fC [static]\fR"
Decodes the string \fIurl\fR in-place.
.PP
See also encode().
.SH "QString QUrl::dirPath () const"
Returns the directory path of the URL. This is the part of the path of the URL without the fileName(). See the documentation of fileName() for a discussion of what is handled as file name and what is handled as directory path.
.PP
See also setPath() and hasPath().
.PP
Example: network/networkprotocol/nntp.cpp.
.SH "void QUrl::encode ( QString & url )\fC [static]\fR"
Encodes the string \fIurl\fR in-place.
.PP
See also decode().
.SH "QString QUrl::encodedPathAndQuery ()"
Returns the encoded path and query.
.PP
See also decode().
.SH "QString QUrl::fileName () const"
Returns the file name of the URL. If the path of the URL doesn't have a slash at the end, the part between the last slash and the end of the path string is considered to be the file name. If the path has a slash at the end, an empty string is returned here.
.PP
See also setFileName().
.PP
Example: network/networkprotocol/nntp.cpp.
.SH "bool QUrl::hasHost () const"
Returns TRUE if the URL contains a hostname; otherwise returns FALSE.
.PP
See also setHost().
.SH "bool QUrl::hasPassword () const"
Returns TRUE if the URL contains a password; otherise returns FALSE.
.PP
\fBWarning:\fR Passwords passed in URLs are normally \fIinsecure\fR; this is due to the mechanism, not because of Qt.
.PP
See also setPassword() and setUser().
.SH "bool QUrl::hasPath () const"
Returns TRUE if the URL contains a path, otherwise FALSE.
.PP
See also path() and setPath().
.SH "bool QUrl::hasPort () const"
Returns TRUE if the URL contains a port; otherwise returns FALSE.
.PP
See also setPort().
.SH "bool QUrl::hasRef () const"
Returns TRUE if the URL has a reference; otherwise returns FALSE.
.PP
See also setRef().
.SH "bool QUrl::hasUser () const"
Returns TRUE if the URL contains a username; otherwise returns FALSE.
.PP
See also setUser() and setPassword().
.SH "QString QUrl::host () const"
Returns the hostname of the URL.
.PP
See also setHost() and hasHost().
.SH "bool QUrl::isLocalFile () const"
Returns TRUE if the URL is a local file, otherwise FALSE.
.PP
Example: qdir/qdir.cpp.
.SH "bool QUrl::isRelativeUrl ( const QString & url )\fC [static]\fR"
Returns TRUE if \fIurl\fR is relative; otherwise returns FALSE.
.SH "bool QUrl::isValid () const"
Returns TRUE if the URL is valid; otherwise returns FALSE. A URL is invalid if it cannot be parsed, for example.
.SH "QUrl::operator QString () const"
Composes a string version of the URL and returns it.
.PP
See also QUrl::toString().
.SH "QUrl & QUrl::operator= ( const QUrl & url )"
Assigns the data of \fIurl\fR to this class.
.SH "QUrl & QUrl::operator= ( const QString & url )"
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
.PP
Parses \fIurl\fR and assigns the resulting data to this class.
.PP
If you pass a string like "/home/qt" the "file" protocol will be assumed.
.SH "bool QUrl::operator== ( const QUrl & url ) const"
Compares this URL with \fIurl\fR and returns TRUE if they are equal; otherwise returns FALSE.
.SH "bool QUrl::operator== ( const QString & url ) const"
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
.PP
Compares this URL with \fIurl\fR. \fIurl\fR is parsed first. Returns TRUE if \fIurl\fR is equal to this url; otherwise returns FALSE.
.SH "bool QUrl::parse ( const QString & url )\fC [virtual protected]\fR"
Parses the \fIurl\fR.
.SH "QString QUrl::password () const"
Returns the password of the URL.
.PP
\fBWarning:\fR Passwords passed in URLs are normally \fIinsecure\fR; this is due to the mechanism, not because of Qt.
.PP
See also setPassword() and setUser().
.SH "QString QUrl::path ( bool correct = TRUE ) const"
Returns the path of the URL. If \fIcorrect\fR is TRUE, the path is cleaned (deals with too many or too few slashes, cleans things like "/../..", etc). Otherwise path() returns exactly the path that was parsed or set.
.PP
See also setPath() and hasPath().
.PP
Example: qdir/qdir.cpp.
.SH "int QUrl::port () const"
Returns the port of the URL or -1 if no port has been set.
.PP
See also setPort().
.SH "QString QUrl::protocol () const"
Returns the protocol of the URL. Typically," file", "http", or "ftp", etc.
.PP
See also setProtocol().
.SH "QString QUrl::query () const"
Returns the (encoded) query of the URL.
.PP
See also setQuery() and decode().
.SH "QString QUrl::ref () const"
Returns the (encoded) reference of the URL.
.PP
See also setRef(), hasRef() and decode().
.SH "void QUrl::reset ()\fC [virtual protected]\fR"
Resets all parts of the URL to their default values and invalidates it.
.SH "void QUrl::setEncodedPathAndQuery ( const QString & pathAndQuery )\fC [virtual]\fR"
Parses \fIpathAndQuery\fR for a path and query and sets those values. The whole string has to be encoded.
.PP
See also encode().
.SH "void QUrl::setFileName ( const QString & name )\fC [virtual]\fR"
Sets the file name of the URL to \fIname\fR. If this URL contains a fileName(), the original file name is replaced by \fIname\fR.
.PP
See the documentation of fileName() for a more detailed discussion of what is handled as file name and what is handled as a directory path.
.PP
See also fileName().
.SH "void QUrl::setHost ( const QString & host )\fC [virtual]\fR"
Sets the hostname of the URL to \fIhost\fR.
.PP
See also host() and hasHost().
.SH "void QUrl::setPassword ( const QString & pass )\fC [virtual]\fR"
Sets the password of the URL to \fIpass\fR.
.PP
\fBWarning:\fR Passwords passed in URLs are normally \fIinsecure\fR; this is due to the mechanism, not because of Qt.
.PP
See also password() and setUser().
.SH "void QUrl::setPath ( const QString & path )\fC [virtual]\fR"
Sets the path of the URL to \fIpath\fR.
.PP
See also path() and hasPath().
.SH "void QUrl::setPort ( int port )\fC [virtual]\fR"
Sets the port of the URL to \fIport\fR.
.PP
See also port().
.SH "void QUrl::setProtocol ( const QString & protocol )\fC [virtual]\fR"
Sets the protocol of the URL to \fIprotocol\fR. Typically," file", "http", or "ftp", etc.
.PP
See also protocol().
.SH "void QUrl::setQuery ( const QString & txt )\fC [virtual]\fR"
Sets the query of the URL to \fItxt\fR. \fItxt\fR must be encoded.
.PP
See also query() and encode().
.SH "void QUrl::setRef ( const QString & txt )\fC [virtual]\fR"
Sets the reference of the URL to \fItxt\fR. \fItxt\fR must be encoded.
.PP
See also ref(), hasRef() and encode().
.SH "void QUrl::setUser ( const QString & user )\fC [virtual]\fR"
Sets the username of the URL to \fIuser\fR.
.PP
See also user() and setPassword().
.SH "QString QUrl::toString ( bool encodedPath = FALSE, bool forcePrependProtocol = TRUE ) const\fC [virtual]\fR"
Composes a string version of the URL and returns it. If \fIencodedPath\fR is TRUE the path in the returned string is encoded. If \fIforcePrependProtocol\fR is TRUE and \fIencodedPath\fR looks like a local filename, the "file:/" protocol is also prepended.
.PP
See also encode() and decode().
.SH "QString QUrl::user () const"
Returns the username of the URL.
.PP
See also setUser() and setPassword().

.SH "SEE ALSO"
.BR http://doc.trolltech.com/qurl.html
.BR http://www.trolltech.com/faq/tech.html
.SH COPYRIGHT
Copyright 1992-2001 Trolltech AS, http://www.trolltech.com.  See the
license file included in the distribution for a complete license
statement.
.SH AUTHOR
Generated automatically from the source code.
.SH BUGS
If you find a bug in Qt, please report it as described in
.BR http://doc.trolltech.com/bughowto.html .
Good bug reports help us to help you. Thank you.
.P
The definitive Qt documentation is provided in HTML format; it is
located at $QTDIR/doc/html and can be read using Qt Assistant or with
a web browser. This man page is provided as a convenience for those
users who prefer man pages, although this format is not officially
supported by Trolltech. 
.P
If you find errors in this manual page, please report them to
.BR [e-mail] .
Please include the name of the manual page (qurl.3qt) and the Qt
version (3.0.0).