interface/wx/protocol/http.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        protocol/http.h
   3 // Purpose:     interface of wxHTTP
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxHTTP
  11
  12     wxHTTP can be used to establish a connection to an HTTP server.
  13
  14     wxHTTP can thus be used to create a (basic) HTTP @b client.
  15
  16     @library{wxnet}
  17     @category{net}
  18
  19     @see wxSocketBase, wxURL
  20 */
  21 class wxHTTP : public wxProtocol
  22 {
  23 public:
  24     /**
  25         Default constructor.
  26     */
  27     wxHTTP();
  28
  29     /**
  30         Destructor will close the connection if connected.
  31     */
  32     virtual ~wxHTTP();
  33
  34     //@{
  35     /**
  36         Connect to the HTTP server.
  37
  38         By default, connection is made to the port 80 of the specified @a host.
  39         You may connect to a non-default port by specifying it explicitly using
  40         the second overload.
  41
  42         Currently wxHTTP only supports IPv4.
  43
  44         For the overload taking wxSockAddress, the @a wait argument is ignored.
  45      */
  46     virtual bool Connect(const wxString& host);
  47     virtual bool Connect(const wxString& host, unsigned short port);
  48     virtual bool Connect(const wxSockAddress& addr, bool wait);
  49     //@}
  50
  51     /**
  52         Returns the data attached with a field whose name is specified by @a header.
  53         If the field doesn't exist, it will return an empty string and not a @NULL string.
  54
  55         @note
  56         The header is not case-sensitive, i.e. "CONTENT-TYPE" and "content-type"
  57         represent the same header.
  58     */
  59     wxString GetHeader(const wxString& header) const;
  60
  61     /**
  62         Creates a new input stream on the specified path.
  63
  64         Notice that this stream is unseekable, i.e. SeekI() and TellI() methods
  65         shouldn't be used.
  66
  67         Note that you can still know the size of the file you are getting using
  68         wxStreamBase::GetSize(). However there is a limitation: in HTTP protocol,
  69         the size is not always specified so sometimes @c (size_t)-1 can returned to
  70         indicate that the size is unknown.
  71         In such case, you may want to use wxInputStream::LastRead() method in a loop
  72         to get the total size.
  73
  74         @return Returns the initialized stream. You must delete it yourself
  75                  once you don't use it anymore and this must be done before
  76                  the wxHTTP object itself is destroyed. The destructor
  77                  closes the network connection. The next time you will
  78                  try to get a file the network connection will have to
  79                  be reestablished, but you don't have to take care of
  80                  this since wxHTTP reestablishes it automatically.
  81
  82         @see wxInputStream
  83     */
  84     virtual wxInputStream* GetInputStream(const wxString& path);
  85
  86     /**
  87         Returns the HTTP response code returned by the server.
  88
  89         Please refer to RFC 2616 for the list of responses.
  90     */
  91     int GetResponse() const;
  92
  93     /**
  94         It sets data of a field to be sent during the next request to the HTTP server.
  95
  96         The field name is specified by @a header and the content by @a h_data.
  97         This is a low level function and it assumes that you know what you are doing.
  98     */
  99     void SetHeader(const wxString& header, const wxString& h_data);
 100
 101     /**
 102         Returns the value of a cookie.
 103     */
 104
 105     wxString GetCookie(const wxString& cookie) const;
 106
 107     /**
 108         Returns @true if there were cookies.
 109     */
 110     bool HasCookies() const;
 111
 112     /**
 113         Set the data to be posted to the server.
 114
 115         If a non-empty string is passed to this method, the next request will
 116         be an HTTP @c POST instead of the default HTTP @c GET and the data from
 117         @a post_buf will be posted as the body of this request.
 118      */
 119     void SetPostBuffer(const wxString& post_buf);
 120 };
 121