More work on fp lib table wizard: add a button to import the full list of .pretty libs on github.

* if the current select plugin is the github plugin, one can select some of these libraries and add them to the table
* if the current select plugin is the kicad plugin, one can select some of these libraries and download them to make alocal copy.
  They can added to the table after they are downloaded.

pcbnew/github/github_plugin.cpp

@@ -2,7 +2,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2013 SoftPLC Corporation, Dick Hollenbeck <[email protected]>
- * Copyright (C) 2013 KiCad Developers, see CHANGELOG.TXT for contributors.
+ * Copyright (C) 2015 KiCad Developers, see CHANGELOG.TXT for contributors.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -101,6 +101,7 @@ Vary: Accept-Encoding
 #include <class_module.h>
 #include <macros.h>
 #include <fp_lib_table.h>       // ExpandSubstitutions()
+#include <github_getliblist.h>
 
 using namespace std;
 
@@ -549,6 +550,57 @@ void GITHUB_PLUGIN::remote_get_zip( const wxString& aRepoURL ) throw( IO_ERROR )
     }
 }
 
+// This GITHUB_GETLIBLIST method should not be here, but in github_getliblist.cpp!
+// However it is here just because we need to include <avhttp.hpp> to compile it.
+// and if we include avhttp in 2 .cpp files, the link fails becuse it detects duplicate
+// avhttp functions.
+// So until it is fixed, this code is here.
+bool GITHUB_GETLIBLIST::remote_get_json( std::string* aFullURLCommand, wxString* aMsgError )
+{
+    boost::asio::io_service io;
+    avhttp::http_stream     h( io );
+    avhttp::request_opts    options;
+
+    options.insert( "Accept",       "application/json" );
+    options.insert( "User-Agent",   "http://kicad-pcb.org" );   // THAT WOULD BE ME.
+    h.request_options( options );
+
+    try
+    {
+        std::ostringstream os;
+
+        h.open( *aFullURLCommand );      // only one file, therefore do it synchronously.
+        os << &h;
+
+        // Keep json text file image in RAM.
+        m_json_image = os.str();
+
+        // 4 lines, using SSL, top that.
+    }
+    catch( boost::system::system_error& e )
+    {
+        // https "GET" has faild, report this to API caller.
+        static const char errorcmd[] = "https GET command failed";  // Do not translate this message
+
+        UTF8 fmt( _( "%s\nCannot get/download json data from: '%s'\nReason: '%s'" ) );
+
+        std::string msg = StrPrintf( fmt.c_str(),
+                errorcmd,
+                // Report secret list_url to user.  The secret
+                // list_url may go bad at some point in future if github changes
+                // their server architecture.  Then fix repoURL_zipURL() to reflect
+                // new architecture.
+                aFullURLCommand->c_str(), e.what() );
+
+        if( aMsgError )
+        {
+            *aMsgError =  msg;
+            return false;
+        }
+    }
+
+    return true;
+}
 
 #if 0 && defined(STANDALONE)