src/common/webviewfilehandler.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        webviewfilehandler.cpp
   3 // Purpose:     Custom handler for the file scheme to allow archive browsing
   4 // Author:      Steven Lamerton
   5 // Id:          $Id$
   6 // Copyright:   (c) 2011 Steven Lamerton
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_WEB
  14
  15 #if defined(__BORLANDC__)
  16     #pragma hdrstop
  17 #endif
  18
  19 #include "wx/webviewfilehandler.h"
  20 #include "wx/filesys.h"
  21
  22 //Taken from wx/filesys.cpp
  23 static wxString EscapeFileNameCharsInURL(const char *in)
  24 {
  25     wxString s;
  26
  27     for ( const unsigned char *p = (const unsigned char*)in; *p; ++p )
  28     {
  29         const unsigned char c = *p;
  30
  31         if ( c == '/' || c == '-' || c == '.' || c == '_' || c == '~' ||
  32              (c >= '0' && c <= '9') ||
  33              (c >= 'a' && c <= 'z') ||
  34              (c >= 'A' && c <= 'Z') )
  35         {
  36             s << c;
  37         }
  38         else
  39         {
  40             s << wxString::Format("%%%02x", c);
  41         }
  42     }
  43
  44     return s;
  45 }
  46
  47 wxWebFileHandler::wxWebFileHandler()
  48 {
  49     m_name = "file";
  50     m_fileSystem = new wxFileSystem();
  51 }
  52
  53 wxFSFile* wxWebFileHandler::GetFile(const wxString &uri)
  54 {
  55     //If there is a fragment at the end of the path then we need to strip it
  56     //off as not all backends do this for us
  57     wxString path = uri;
  58     size_t hashloc = uri.find('#');
  59     if(hashloc != wxString::npos)
  60     {
  61         path = uri.substr(0, hashloc);
  62     }
  63
  64     //We iterate through the string to see if there is a protocol description
  65     size_t start = wxString::npos;
  66     for(size_t i = 0; i < path.length(); i++)
  67     {
  68         if(path[i] == ';' && path.substr(i, 10) == ";protocol=")
  69         {
  70             start = i;
  71             break;
  72         }
  73     }
  74
  75     //We do not have a protocol string so we just pass the path withouth the
  76     if(start == wxString::npos)
  77     {
  78         size_t doubleslash = path.find("//");
  79         //The path is incorrectly formed without // after the scheme
  80         if(doubleslash == wxString::npos)
  81             return NULL;
  82
  83         wxString fspath = "file:" +
  84                           EscapeFileNameCharsInURL(path.substr(doubleslash + 2));
  85         return m_fileSystem->OpenFile(fspath);
  86     }
  87     //Otherwise we need to extract the protocol
  88     else
  89     {
  90         size_t end = path.find('/', start);
  91         //For the path to be valid there must to a path after the protocol
  92         if(end == wxString::npos)
  93         {
  94             return NULL;
  95         }
  96         wxString mainpath = path.substr(0, start);
  97         wxString archivepath = path.substr(end);
  98         wxString protstring = path.substr(start, end - start);
  99         wxString protocol = protstring.substr(10);
 100         //We can now construct the correct path
 101         size_t doubleslash = path.find("//");
 102         //The path is incorrectly formed without // after the first protocol
 103         if(doubleslash == wxString::npos)
 104             return NULL;
 105
 106         wxString fspath = "file:" +
 107                           EscapeFileNameCharsInURL(mainpath.substr(doubleslash + 2))
 108                           + "#" + protocol +":" + archivepath;
 109         return m_fileSystem->OpenFile(fspath);
 110     }
 111 }
 112
 113 #endif // wxUSE_WEB