resurected error msg window. Added a check for file hashes in FileRequest() to detect issues with badly formed file links

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@2230 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/ft/ftserver.cc

@@ -23,6 +23,7 @@
  *
  */
 
+#include <sstream>
 #include "util/rsdebug.h"
 #include "util/rsdir.h"
 #include "rsiface/rstypes.h"
@@ -243,8 +244,42 @@ void	ftServer::run()
 	/********************** Controller Access **********************/
 	/***************************************************************/
 
+bool ftServer::checkHash(const std::string& hash,std::string& error_string)
+{
+	static const uint32_t HASH_LENGTH = 40 ;
+
+	if(hash.length() != HASH_LENGTH)
+	{
+		std::ostringstream is ;
+		is << "Line too long : " << hash.length() << " chars, " << HASH_LENGTH << " expected." ;
+		is.flush() ;
+		error_string = is.str() ;
+		return false ;
+	}
+
+	for(uint i=0;i<hash.length();++i)
+		if(!((hash[i] > 47 && hash[i] < 58) || (hash[i] > 96 && hash[i] < 103)))
+		{
+			std::ostringstream is;
+			is << "unexpected char code=" << (int)hash[i] << " '" << hash[i] << "'" ;
+			is.flush() ;
+			error_string = is.str() ;
+			return false ;
+		}
+
+	return true ;
+}
+
 bool ftServer::FileRequest(std::string fname, std::string hash, uint64_t size, std::string dest, uint32_t flags, std::list<std::string> srcIds)
 {
+	std::string error_string ;
+
+	if(!checkHash(hash,error_string))
+	{
+		rsicontrol->getNotify().notifyErrorMsg(0,0,"Error handling hash \""+hash+"\". This hash appears to be invalid(Error string=\""+error_string+"\"). This is probably due an bad handling of strings.") ;
+		return false ;
+	}
+
    std::cerr << "Requesting " << fname << std::endl ;
 
 	if(mFtController->alreadyHaveFile(hash))

libretroshare/src/ft/ftserver.h

@@ -102,6 +102,10 @@ void	StartupThreads();
 	/* own thread */
 virtual void	run();
 
+// Checks that the given hash is well formed. Used to chase 
+// string bugs.
+static bool checkHash(const std::string& hash,std::string& error_string) ;
+
 	/***************************************************************/
 	/*************** Control Interface *****************************/
 	/************** (Implements RsFiles) ***************************/

retroshare-gui/src/gui/MainWindow.cpp

@@ -503,6 +503,11 @@ void MainWindow::doQuit()
 	rApp->quit();
 }
 
+void MainWindow::displayErrorMessage(int a,int b,const QString& error_msg)
+{
+	QMessageBox::critical(NULL, tr("Internal Error"),error_msg) ;
+}
+
 void MainWindow::closeEvent(QCloseEvent *e)
 {
     static bool firstTime = true;

retroshare-gui/src/gui/MainWindow.h

@@ -102,6 +102,7 @@ public slots:
     void showWindow(Page page);
 
     void updateHashingInfo(const QString&) ;
+	 void displayErrorMessage(int,int,const QString&) ;
 	
 protected:
     void closeEvent(QCloseEvent *);

retroshare-gui/src/gui/notifyqt.cpp

@@ -31,11 +31,7 @@
 
 void NotifyQt::notifyErrorMsg(int list, int type, std::string msg)
 {
-	(void) list;
-	(void) type;
-	(void) msg;
-
-	return;
+	emit errorOccurred(list,type,QString::fromStdString(msg)) ;
 }
 
 void NotifyQt::notifyOwnAvatarChanged()

retroshare-gui/src/gui/notifyqt.h

@@ -40,6 +40,7 @@ class NotifyQt: public QObject, public NotifyBase
 		virtual void notifyPeerHasNewAvatar(std::string peer_id) ;
 		virtual void notifyOwnAvatarChanged() ;
 		virtual void notifyOwnStatusMessageChanged() ;
+
 		virtual std::string askForPassword(const std::string& window_title,const std::string& text) ;
 
 	signals:
@@ -61,6 +62,7 @@ class NotifyQt: public QObject, public NotifyBase
 		void peerHasNewAvatar(const QString& peer_id) const ;
 		void ownAvatarChanged() const ;
 		void ownStatusMessageChanged() const ;
+		void errorOccurred(int,int,const QString&) const ;
 
 	public slots:
 

retroshare-gui/src/main.cpp

@@ -149,6 +149,7 @@ int main(int argc, char *argv[])
 	QObject::connect(notify,SIGNAL(ownStatusMessageChanged()),w->peersDialog,SLOT(loadmypersonalstatus()));
 
 	QObject::connect(notify,SIGNAL(logInfoChanged(const QString&)),w->networkDialog,SLOT(setLogInfo(QString))) ;
+	QObject::connect(notify,SIGNAL(errorOccurred(int,int,const QString&)),w,SLOT(displayErrorMessage(int,int,const QString&))) ;
 
 	QObject::connect(ConfCertDialog::instance(),SIGNAL(configChanged()),w->networkDialog,SLOT(insertConnect())) ;
 	QObject::connect(w->peersDialog,SIGNAL(friendsUpdated()),w->networkDialog,SLOT(insertConnect())) ;