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[wxWidgets.git] / src / common / fs_inet.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/common/fs_inet.cpp
3 // Purpose: HTTP and FTP file system
4 // Author: Vaclav Slavik
5 // Copyright: (c) 1999 Vaclav Slavik
6 // RCS-ID: $Id$
7 // Licence: wxWindows licence
8 /////////////////////////////////////////////////////////////////////////////
9
10 #include "wx/wxprec.h"
11
12 #ifdef __BORLANDC__
13 #pragma hdrstop
14 #endif
15
16 #if !wxUSE_SOCKETS
17 #undef wxUSE_FS_INET
18 #define wxUSE_FS_INET 0
19 #endif
20
21 #if wxUSE_FILESYSTEM && wxUSE_FS_INET
22
23 #ifndef WX_PRECOMP
24 #include "wx/module.h"
25 #endif
26
27 #include "wx/wfstream.h"
28 #include "wx/url.h"
29 #include "wx/filesys.h"
30 #include "wx/fs_inet.h"
31
32 // ----------------------------------------------------------------------------
33 // Helper classes
34 // ----------------------------------------------------------------------------
35
36 // This stream deletes the file when destroyed
37 class wxTemporaryFileInputStream : public wxFileInputStream
38 {
39 public:
40 wxTemporaryFileInputStream(const wxString& filename) :
41 wxFileInputStream(filename), m_filename(filename) {}
42
43 virtual ~wxTemporaryFileInputStream()
44 {
45 // NB: copied from wxFileInputStream dtor, we need to do it before
46 // wxRemoveFile
47 if (m_file_destroy)
48 {
49 delete m_file;
50 m_file_destroy = false;
51 }
52 wxRemoveFile(m_filename);
53 }
54
55 protected:
56 wxString m_filename;
57 };
58
59
60 // ----------------------------------------------------------------------------
61 // wxInternetFSHandler
62 // ----------------------------------------------------------------------------
63
64 static wxString StripProtocolAnchor(const wxString& location)
65 {
66 wxString myloc(location.BeforeLast(wxT('#')));
67 if (myloc.empty()) myloc = location.AfterFirst(wxT(':'));
68 else myloc = myloc.AfterFirst(wxT(':'));
69
70 // fix malformed url:
71 if (!myloc.Left(2).IsSameAs(wxT("//")))
72 {
73 if (myloc.GetChar(0) != wxT('/')) myloc = wxT("//") + myloc;
74 else myloc = wxT("/") + myloc;
75 }
76 if (myloc.Mid(2).Find(wxT('/')) == wxNOT_FOUND) myloc << wxT('/');
77
78 return myloc;
79 }
80
81
82 bool wxInternetFSHandler::CanOpen(const wxString& location)
83 {
84 #if wxUSE_URL
85 wxString p = GetProtocol(location);
86 if ((p == wxT("http")) || (p == wxT("ftp")))
87 {
88 wxURL url(p + wxT(":") + StripProtocolAnchor(location));
89 return (url.GetError() == wxURL_NOERR);
90 }
91 #endif
92 return false;
93 }
94
95
96 wxFSFile* wxInternetFSHandler::OpenFile(wxFileSystem& WXUNUSED(fs),
97 const wxString& location)
98 {
99 #if !wxUSE_URL
100 return NULL;
101 #else
102 wxString right =
103 GetProtocol(location) + wxT(":") + StripProtocolAnchor(location);
104
105 wxURL url(right);
106 if (url.GetError() == wxURL_NOERR)
107 {
108 wxInputStream *s = url.GetInputStream();
109 wxString content = url.GetProtocol().GetContentType();
110 if (s)
111 {
112 wxString tmpfile =
113 wxFileName::CreateTempFileName(wxT("wxhtml"));
114
115 { // now copy streams content to temporary file:
116 wxFileOutputStream sout(tmpfile);
117 s->Read(sout);
118 }
119 delete s;
120
121 return new wxFSFile(new wxTemporaryFileInputStream(tmpfile),
122 right,
123 content,
124 GetAnchor(location)
125 #if wxUSE_DATETIME
126 , wxDateTime::Now()
127 #endif // wxUSE_DATETIME
128 );
129 }
130 }
131
132 return NULL; // incorrect URL
133 #endif
134 }
135
136
137 class wxFileSystemInternetModule : public wxModule
138 {
139 DECLARE_DYNAMIC_CLASS(wxFileSystemInternetModule)
140
141 public:
142 wxFileSystemInternetModule() :
143 wxModule(),
144 m_handler(NULL)
145 {
146 }
147
148 virtual bool OnInit()
149 {
150 m_handler = new wxInternetFSHandler;
151 wxFileSystem::AddHandler(m_handler);
152 return true;
153 }
154
155 virtual void OnExit()
156 {
157 delete wxFileSystem::RemoveHandler(m_handler);
158 }
159
160 private:
161 wxFileSystemHandler* m_handler;
162 };
163
164 IMPLEMENT_DYNAMIC_CLASS(wxFileSystemInternetModule, wxModule)
165
166 #endif // wxUSE_FILESYSTEM && wxUSE_FS_INET