interface/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     @headerfile http.h wx/protocol/http.h
  12
  13     wxHTTP can be used to establish a connection to an HTTP server.
  14
  15     @library{wxnet}
  16     @category{net}
  17
  18     @see wxSocketBase, wxURL
  19 */
  20 class wxHTTP : public wxProtocol
  21 {
  22 public:
  23     /**
  24         Returns the data attached with a field whose name is specified by @e header.
  25         If the field doesn't exist, it will return an empty string and not a @NULL string.
  26
  27         @note
  28         The header is not case-sensitive, i.e. "CONTENT-TYPE" and "content-type"
  29         represent the same header.
  30     */
  31     wxString GetHeader(const wxString& header);
  32
  33     /**
  34         Creates a new input stream on the specified path.
  35
  36         Notice that this stream is unseekable, i.e. SeekI() and TellI() methods
  37         shouldn't be used.
  38
  39         Note that you can still know the size of the file you are getting using
  40         wxStreamBase::GetSize(). However there is a limitation: in HTTP protocol,
  41         the size is not always specified so sometimes @c (size_t)-1 can returned to
  42         indicate that the size is unknown.
  43         In such case, you may want to use wxInputStream::LastRead() method in a loop
  44         to get the total size.
  45
  46         @returns Returns the initialized stream. You must delete it yourself
  47                  once you don't use it anymore and this must be done before
  48                  the wxHTTP object itself is destroyed. The destructor
  49                  closes the network connection. The next time you will
  50                  try to get a file the network connection will have to
  51                  be reestablished, but you don't have to take care of
  52                  this since wxHTTP reestablishes it automatically.
  53
  54         @see wxInputStream
  55     */
  56     wxInputStream* GetInputStream(const wxString& path);
  57
  58     /**
  59         Returns the HTTP response code returned by the server.
  60
  61         Please refer to RFC 2616 for the list of responses.
  62     */
  63     int GetResponse() const;
  64
  65     /**
  66         It sets data of a field to be sent during the next request to the HTTP server.
  67
  68         The field name is specified by @a header and the content by @e h_data.
  69         This is a low level function and it assumes that you know what you are doing.
  70     */
  71     void SetHeader(const wxString& header, const wxString& h_data);
  72 };
  73