fixing overrelease and out-of-bounds write, fixes #13725

[wxWidgets.git] / src / common / url.cpp

diff --git a/src/common/url.cpp b/src/common/url.cpp
index cf3272ef225262d6dfcc087daefcdcb85e3a706f..15b9311839e476a852c5975c9cf8670264912b7f 100644 (file)
--- a/src/common/url.cpp
+++ b/src/common/url.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        url.cpp
+// Name:        src/common/url.cpp
 // Purpose:     URL parser
 // Author:      Guilhem Lavaux
 // Modified by:
@@ -9,29 +9,27 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "url.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
-#pragma hdrstop
+    #pragma hdrstop
 #endif
 
 #if wxUSE_URL
 
-#include "wx/string.h"
-#include "wx/list.h"
-#include "wx/utils.h"
-#include "wx/module.h"
 #include "wx/url.h"
 
+#ifndef WX_PRECOMP
+    #include "wx/list.h"
+    #include "wx/string.h"
+    #include "wx/utils.h"
+    #include "wx/module.h"
+#endif
+
 #include <string.h>
 #include <ctype.h>
 
-IMPLEMENT_CLASS(wxProtoInfo, wxObject)
 IMPLEMENT_CLASS(wxURL, wxURI)
 
 // Protocols list
@@ -67,9 +65,15 @@ wxURL::wxURL(const wxString& url) : wxURI(url)
     ParseURL();
 }
 
-wxURL::wxURL(const wxURI& url) : wxURI(url)
+wxURL::wxURL(const wxURI& uri) : wxURI(uri)
+{
+    Init(uri.BuildURI());
+    ParseURL();
+}
+
+wxURL::wxURL(const wxURL& url) : wxURI(url)
 {
-    Init(url.BuildURI());
+    Init(url.GetURL());
     ParseURL();
 }
 
@@ -104,18 +108,39 @@ void wxURL::Init(const wxString& url)
 // Assignment
 // --------------------------------------------------------------
 
-wxURL& wxURL::operator = (const wxURI& url)
+wxURL& wxURL::operator = (const wxString& url)
 {
     wxURI::operator = (url);
-    Init(url.BuildURI());
+    Free();
+    Init(url);
     ParseURL();
+
     return *this;
 }
-wxURL& wxURL::operator = (const wxString& url)
+
+wxURL& wxURL::operator = (const wxURI& uri)
 {
-    wxURI::operator = (url);
-    Init(url);
-    ParseURL();
+    if (&uri != this)
+    {
+        wxURI::operator = (uri);
+        Free();
+        Init(uri.BuildURI());
+        ParseURL();
+    }
+
+    return *this;
+}
+
+wxURL& wxURL::operator = (const wxURL& url)
+{
+    if (&url != this)
+    {
+        wxURI::operator = (url);
+        Free();
+        Init(url.GetURL());
+        ParseURL();
+    }
+
     return *this;
 }
 
@@ -168,6 +193,8 @@ bool wxURL::ParseURL()
             m_url = m_url + wxT("//") + m_server;
 
         // We initialize specific variables.
+        if (m_protocol)
+            m_protocol->Destroy();
         m_protocol = m_proxy; // FIXME: we should clone the protocol
     }
 #endif // wxUSE_PROTOCOL_HTTP
@@ -185,10 +212,17 @@ void wxURL::CleanData()
 #if wxUSE_PROTOCOL_HTTP
     if (!m_useProxy)
 #endif // wxUSE_PROTOCOL_HTTP
-        delete m_protocol;
+    {
+        if (m_protocol)
+        {
+            // Need to safely delete the socket (pending events)
+            m_protocol->Destroy();
+            m_protocol = NULL;
+        }
+    }
 }
 
-wxURL::~wxURL()
+void wxURL::Free()
 {
     CleanData();
 #if wxUSE_PROTOCOL_HTTP
@@ -200,6 +234,11 @@ wxURL::~wxURL()
 #endif
 }
 
+wxURL::~wxURL()
+{
+    Free();
+}
+
 // --------------------------------------------------------------
 // FetchProtocol
 // --------------------------------------------------------------
@@ -212,7 +251,7 @@ bool wxURL::FetchProtocol()
     {
         if (m_scheme == info->m_protoname)
         {
-            if (m_port.IsNull())
+            if ( m_port.empty() )
                 m_port = info->m_servname;
             m_protoinfo = info;
             m_protocol = (wxProtocol *)m_protoinfo->m_cinfo->CreateObject();
@@ -241,11 +280,11 @@ wxInputStream *wxURL::GetInputStream()
         size_t dwPasswordPos = m_userinfo.find(':');
 
         if (dwPasswordPos == wxString::npos)
-            m_protocol->SetUser(m_userinfo);
+            m_protocol->SetUser(Unescape(m_userinfo));
         else
         {
-            m_protocol->SetUser(m_userinfo(0, dwPasswordPos));
-            m_protocol->SetPassword(m_userinfo(dwPasswordPos+1, m_userinfo.length() + 1));
+            m_protocol->SetUser(Unescape(m_userinfo(0, dwPasswordPos)));
+            m_protocol->SetPassword(Unescape(m_userinfo(dwPasswordPos+1, m_userinfo.length() + 1)));
         }
     }
 
@@ -266,7 +305,11 @@ wxInputStream *wxURL::GetInputStream()
     wxIPV4address addr;
 
     // m_protoinfo is NULL when we use a proxy
-    if (!m_useProxy && m_protoinfo->m_needhost)
+    if (
+#if wxUSE_PROTOCOL_HTTP
+         !m_useProxy &&
+#endif // wxUSE_PROTOCOL_HTTP
+         m_protoinfo->m_needhost )
     {
         if (!addr.Hostname(m_server))
         {
@@ -282,13 +325,15 @@ wxInputStream *wxURL::GetInputStream()
             return NULL;
         }
     }
-#endif
+#endif // wxUSE_SOCKETS
 
     wxString fullPath;
 
+#if wxUSE_PROTOCOL_HTTP
     // When we use a proxy, we have to pass the whole URL to it.
     if (m_useProxy)
         fullPath += m_url;
+#endif // wxUSE_PROTOCOL_HTTP
 
     if(m_path.empty())
         fullPath += wxT("/");
@@ -320,8 +365,7 @@ void wxURL::SetDefaultProxy(const wxString& url_proxy)
         if ( ms_proxyDefault )
         {
             ms_proxyDefault->Close();
-            delete ms_proxyDefault;
-            ms_proxyDefault = NULL;
+            wxDELETE(ms_proxyDefault);
         }
     }
     else
@@ -332,7 +376,7 @@ void wxURL::SetDefaultProxy(const wxString& url_proxy)
             return;
 
         wxString hostname = tmp_str(0, pos),
-        port = tmp_str(pos+1, tmp_str.Length()-pos);
+        port = tmp_str(pos+1, tmp_str.length()-pos);
         wxIPV4address addr;
 
         if (!addr.Hostname(hostname))
@@ -375,7 +419,7 @@ void wxURL::SetProxy(const wxString& url_proxy)
             return;
 
         hostname = tmp_str(0, pos);
-        port = tmp_str(pos+1, tmp_str.Length()-pos);
+        port = tmp_str(pos+1, tmp_str.length()-pos);
 
         addr.Hostname(hostname);
         addr.Service(port);
@@ -405,6 +449,8 @@ void wxURL::SetProxy(const wxString& url_proxy)
 class wxURLModule : public wxModule
 {
 public:
+    wxURLModule();
+
     virtual bool OnInit();
     virtual void OnExit();
 
@@ -414,6 +460,13 @@ private:
 
 IMPLEMENT_DYNAMIC_CLASS(wxURLModule, wxModule)
 
+wxURLModule::wxURLModule()
+{
+    // we must be cleaned up before wxSocketModule as otherwise deleting
+    // ms_proxyDefault from our OnExit() won't work (and can actually crash)
+    AddDependency(wxClassInfo::FindClass(wxT("wxSocketModule")));
+}
+
 bool wxURLModule::OnInit()
 {
 #if wxUSE_PROTOCOL_HTTP
@@ -422,7 +475,7 @@ bool wxURLModule::OnInit()
     // down the program startup (especially if there is no DNS server
     // available, in which case it may take up to 1 minute)
 
-    if ( wxGetenv(_T("HTTP_PROXY")) )
+    if ( wxGetenv(wxT("HTTP_PROXY")) )
     {
         wxURL::ms_useDefaultProxy = true;
     }
@@ -433,11 +486,11 @@ bool wxURLModule::OnInit()
 void wxURLModule::OnExit()
 {
 #if wxUSE_PROTOCOL_HTTP
-    delete wxURL::ms_proxyDefault;
-    wxURL::ms_proxyDefault = NULL;
+    wxDELETE(wxURL::ms_proxyDefault);
 #endif // wxUSE_PROTOCOL_HTTP
 }
 
 #endif // wxUSE_SOCKETS
 
+
 #endif // wxUSE_URL