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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2963 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/fs_inet.cpp

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+/////////////////////////////////////////////////////////////////////////////
+// Name:        fs_inet.cpp
+// Purpose:     HTTP and FTP file system
+// Author:      Vaclav Slavik
+// Copyright:   (c) 1999 Vaclav Slavik
+// Licence:     wxWindows Licence
+/////////////////////////////////////////////////////////////////////////////
+
+/*
+
+REMARKS : 
+
+This FS creates local cache (in /tmp directory). The cache is freed
+on program exit.
+
+Size of cache is limited to cca 1000 items (due to GetTempFileName
+limitation)
+
+
+*/
+
+#ifdef __GNUG__
+#pragma implementation
+#endif
+
+#include <wx/wxprec.h>
+
+#ifdef __BORDLANDC__
+#pragma hdrstop
+#endif
+
+#ifndef WXPRECOMP
+#include <wx/wx.h>
+#endif
+
+#include "wx/wfstream.h"
+#include "wx/url.h"
+#include "wx/filesys.h"
+#include "wx/fs_inet.h"
+
+class wxInetCacheNode : public wxObject
+{
+    private:
+        wxString m_Temp;
+        wxString m_Mime;
+
+    public:
+        wxInetCacheNode(const wxString& l, const wxString& m) : wxObject() {m_Temp = l; m_Mime = m;}
+        const wxString& GetTemp() const {return m_Temp;}
+        const wxString& GetMime() const {return m_Mime;}
+};
+
+
+
+
+
+//--------------------------------------------------------------------------------
+// wxInternetFSHandler
+//--------------------------------------------------------------------------------
+
+
+bool wxInternetFSHandler::CanOpen(const wxString& location)
+{
+    wxString p = GetProtocol(location);
+    return (p == "http") || (p == "ftp");
+}
+
+
+
+
+wxFSFile* wxInternetFSHandler::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location)
+{
+    wxString right = GetProtocol(location) + ":" + GetRightLocation(location);
+    wxInputStream *s;
+    wxString content;
+    wxInetCacheNode *info;
+
+    info = (wxInetCacheNode*) m_Cache.Get(right);
+
+    // Add item into cache:
+    if (info == NULL) {
+        wxURL url(right);
+        s = url.GetInputStream();
+        content = url.GetProtocol().GetContentType();
+        if (content == wxEmptyString) content = GetMimeTypeFromExt(location);
+        if (s) {
+            char buf[256];
+
+            wxGetTempFileName("wxhtml", buf);
+            info = new wxInetCacheNode(buf, content);
+            m_Cache.Put(right, info);
+
+            {   // ok, now copy it:
+                wxFileOutputStream sout(buf);
+                s -> Read(sout); // copy the stream
+            }
+            delete s;
+        }
+        else return NULL; //we can't open the URL
+    }
+
+    // Load item from cache:
+    s = new wxFileInputStream(info -> GetTemp());
+    if (s) {
+        return new wxFSFile(s,
+                            right,
+                            info -> GetMime(),
+                            GetAnchor(location));
+    }
+    else return NULL;
+}
+
+
+
+wxInternetFSHandler::~wxInternetFSHandler()
+{
+    wxNode *n;
+    wxInetCacheNode *n2;
+
+    m_Cache.BeginFind();
+    while ((n = m_Cache.Next()) != NULL) {
+        n2 = (wxInetCacheNode*) n -> GetData();
+        wxRemoveFile(n2 -> GetTemp());
+        delete n2;
+    }
+}
+
+
+
+