From Stephan Huber, "attached you'll find a zip containing some bug-fixes and some refactored + new code.

* ZeroConfDevice does now return FILE_NOT_HANDLED instead of FILE_NOT_FOUND
* present3D supports multiple devices per env-var P3D_DEVICE, separate multiple device with a space

I refactored parts the p3d-plugin, the curl-plugin and parts of Registry and ReaderWriter. Currently the p3d-plugin tries to open all remote files with the help of the curl-plugin.

I added a new method to Registry called getReaderWriterForProtocolAndExtension. which will return a ReaderWriter which is capable in handling the remote file for the given protocol and extension. If no readerwriter is found for the given extension, a list is built of all readerwriters supporting the given protocol and this list is checked for support of wildcards (extension = "*"). If anything matches it get returned.

I added this principle also to the Registry, so now it's possible to register a generic ReaderWriter which can handle all filetypes for a given protocol, similar what curl is doing. All you have to do is to load the plugin at startup. The curl-fallback is still in place.

With these changes it is now possible to reference a movie inside a presentation without a server-address, read the presentation (with curl) and stream the movie with the correct plugin (e.g. QTKit)

"

applications/present3D/present3D.cpp

@@ -453,8 +453,12 @@ int main( int argc, char **argv )
     const char* p3dDevice = getenv("P3D_DEVICE");
     if (p3dDevice)
     {
-         addDeviceTo(viewer, p3dDevice);
-         
+        osgDB::StringList devices;
+        osgDB::split(p3dDevice, devices);
+        for(osgDB::StringList::iterator i = devices.begin(); i != devices.end(); ++i)
+        {
+            addDeviceTo(viewer, *i);
+        }
     }
 
 

include/osgDB/ReaderWriter

@@ -64,6 +64,8 @@ class OSGDB_EXPORT ReaderWriter : public osg::Object
 
         /** Return true if ReaderWriter accepts specified file extension.*/
         virtual bool acceptsExtension(const std::string& /*extension*/) const;
+        
+        virtual bool acceptsProtocol(const std::string& protocol) const;
 
         /// Bit mask for setting up which feature types are available for read and/or write
         enum Features

include/osgDB/Registry

@@ -128,6 +128,11 @@ class OSGDB_EXPORT Registry : public osg::Referenced
 
         /** get const list of all registered ReaderWriters.*/
         const ReaderWriterList& getReaderWriterList() const { return _rwList; }
+        
+        /** get a list of registered ReaderWriters which can handle given protocol */
+        void getReaderWriterListForProtocol(const std::string& protocol, ReaderWriterList& results) const;
+        
+        ReaderWriter* getReaderWriterForProtocolAndExtension(const std::string& protocol, const std::string& extension);
 
 
         typedef std::vector< osg::ref_ptr<ImageProcessor> > ImageProcessorList;

src/osgDB/ReaderWriter.cpp

@@ -41,10 +41,13 @@ bool ReaderWriter::acceptsExtension(const std::string& extension) const
 {
     // check for an exact match
     std::string lowercase_ext = convertToLowerCase(extension);
-    if (_supportedExtensions.count(lowercase_ext)!=0) return true;
+    return (_supportedExtensions.count(lowercase_ext)!=0);
+}
 
-    // if plugin supports wildcard extension then passthrough all types
-    return (_supportedExtensions.count("*")!=0);
+bool ReaderWriter::acceptsProtocol(const std::string& protocol) const
+{
+    std::string lowercase_protocol = convertToLowerCase(protocol);
+    return (_supportedProtocols.count(lowercase_protocol)!=0);
 }
 
 void ReaderWriter::supportsProtocol(const std::string& fmt, const std::string& description)

src/osgDB/Registry.cpp

@@ -1224,11 +1224,15 @@ ReaderWriter::ReadResult Registry::read(const ReadFunctor& readFunctor)
         }
     }
 
-    //If the filename contains a server address and wasn't loaded by any of the plugins, try to use the CURL plugin
-    //to download the file and use the stream reading functionality of the plugins to load the file
+    //If the filename contains a server address and wasn't loaded by any of the plugins, try to find a plugin which supports the server
+    //protocol and supports wildcards. If not successfully use curl as a last fallback
     if (containsServerAddress(readFunctor._filename))
     {
-        ReaderWriter* rw = getReaderWriterForExtension("curl");
+        ReaderWriter* rw = getReaderWriterForProtocolAndExtension(
+            osgDB::getServerProtocol(readFunctor._filename),
+            osgDB::getFileExtension(readFunctor._filename)
+        );
+                
         if (rw)
         {
             return readFunctor.doRead(*rw);
@@ -1777,3 +1781,34 @@ bool Registry::isProtocolRegistered(const std::string& protocol)
     return (_registeredProtocols.find( convertToLowerCase(protocol) ) != _registeredProtocols.end());
 }
 
+void Registry::getReaderWriterListForProtocol(const std::string& protocol, ReaderWriterList& results) const
+{
+    for(ReaderWriterList::const_iterator i = _rwList.begin(); i != _rwList.end(); ++i)
+    {        if ((*i)->acceptsProtocol(protocol))
+            results.push_back(*i);
+    }
+}
+
+
+ReaderWriter* Registry::getReaderWriterForProtocolAndExtension(const std::string& protocol, const std::string& extension)
+{
+    // try first the registered ReaderWriter
+    ReaderWriter* result = getReaderWriterForExtension(extension);
+    if (result->acceptsProtocol(protocol))
+        return result;
+    
+    result = NULL;
+    ReaderWriterList results;
+    getReaderWriterListForProtocol(protocol, results);
+    
+    for(ReaderWriterList::const_iterator i = results.begin(); i != results.end(); ++i)
+    {
+        // if we have a readerwriter which supports wildcards, save it as a fallback
+        if ((*i)->acceptsExtension("*"))
+            result = *i;
+        else if ((*i)->acceptsExtension(extension))
+            return *i;
+    }
+    
+    return result ? result : getReaderWriterForExtension("curl");
+}

src/osgPlugins/ZeroConfDevice/ReaderWriterZeroConfDevice.cpp

@@ -176,7 +176,7 @@ class ReaderWriterZeroConf : public osgDB::ReaderWriter
                 }
             }
             
-            return ReadResult::FILE_NOT_FOUND;
+            return ReadResult::FILE_NOT_HANDLED;
         }
 private:        
         

src/osgPlugins/curl/ReaderWriterCURL.cpp

@@ -375,6 +375,10 @@ osgDB::ReaderWriter::ReadResult EasyCurl::processResponse(CURLcode res, const st
 ReaderWriterCURL::ReaderWriterCURL()
 {
     supportsProtocol("http","Read from http port using libcurl.");
+    supportsProtocol("https","Read from https port using libcurl.");
+    supportsProtocol("ftp","Read from ftp port using libcurl.");
+    supportsProtocol("ftps","Read from ftps port using libcurl.");
+    
     supportsExtension("curl","Psuedo file extension, used to select curl plugin.");
     supportsExtension("*","Passes all read files to other plugins to handle actual model loading.");
     supportsOption("OSG_CURL_PROXY","Specify the http proxy.");

src/osgPlugins/curl/ReaderWriterCURL.h

@@ -104,11 +104,6 @@ class ReaderWriterCURL : public osgDB::ReaderWriter
 
         virtual const char* className() const { return "HTTP Protocol Model Reader"; }
 
-        virtual bool acceptsExtension(const std::string& extension) const
-        {
-            return osgDB::equalCaseInsensitive(extension,"curl");
-        }
-
         virtual bool fileExists(const std::string& filename, const osgDB::Options* options) const;
 
         virtual ReadResult openArchive(const std::string& fileName,ArchiveStatus status, unsigned int , const Options* options) const

src/osgPlugins/p3d/ReaderWriterP3D.cpp

@@ -2142,7 +2142,12 @@ class MyReadFileCallback : public virtual osgDB::ReadFileCallback
             OSG_INFO<<"Trying server file "<<filename<<std::endl;
 
             osgDB::ReaderWriter::ReadResult result;
-            osgDB::ReaderWriter* rw = osgDB::Registry::instance()->getReaderWriterForExtension("curl");
+            
+            // get a specific readerwriter capable of handling the protocol and extension, will return a registered fallback readerwriter for extension '*'
+            osgDB::ReaderWriter* rw = osgDB::Registry::instance()->getReaderWriterForProtocolAndExtension(
+                osgDB::getServerProtocol(filename),
+                osgDB::getFileExtension(filename));
+                        
             if (!rw) return osgDB::ReaderWriter::ReadResult::FILE_NOT_HANDLED;
 
             switch(type)