Imported existing code

indra/llmessage/llservicebuilder.cpp

@@ -0,0 +1,240 @@
+/** 
+ * @file llservicebuilder.cpp
+ * @brief Implementation of the LLServiceBuilder class.
+ *
+ * $LicenseInfo:firstyear=2007&license=viewergpl$
+ * 
+ * Copyright (c) 2007-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+#include "llapp.h"
+#include "llfile.h"
+#include "llservicebuilder.h"
+#include "llsd.h"
+#include "llsdserialize.h"
+
+void LLServiceBuilder::loadServiceDefinitionsFromFile(
+	const std::string& service_filename)
+{
+	llifstream service_file(service_filename, std::ios::binary);
+	if(service_file.is_open())
+	{
+		LLSD service_data;
+		LLSDSerialize::fromXML(service_data, service_file);
+		service_file.close();
+		// Load service 
+		LLSD service_map = service_data["services"];
+		for(LLSD::array_iterator array_itr = service_map.beginArray();
+			array_itr != service_map.endArray();
+			++array_itr)
+		{	
+			LLSD service_llsd = (*array_itr)["service-builder"];
+			std::string service_name = (*array_itr)["name"].asString();
+			createServiceDefinition(service_name, service_llsd);
+		}
+		llinfos << "loaded config file: " << service_filename << llendl;
+	}
+	else
+	{
+		llwarns << "unable to find config file: " << service_filename << llendl;
+	}
+}
+
+void LLServiceBuilder::createServiceDefinition(
+	const std::string& service_name,
+	LLSD& service_llsd)
+{
+	if(service_llsd.isString())
+	{
+		mServiceMap[ service_name ] = service_llsd.asString();
+	}			
+	else if(service_llsd.isMap())
+	{
+		for(LLSD::map_iterator map_itr = service_llsd.beginMap();
+			map_itr != service_llsd.endMap();
+			++map_itr)
+		{
+			std::string compound_builder_name = service_name;
+			compound_builder_name.append("-");
+			compound_builder_name.append((*map_itr).first);
+			mServiceMap[ compound_builder_name ] = (*map_itr).second.asString();
+		}
+	}
+}
+
+static
+bool starts_with(const std::string& text, const char* prefix)
+{
+	return text.substr(0, strlen(prefix)) == prefix;
+}
+
+// TODO: Build a real services.xml for windows development.
+//       and remove the base_url logic below.
+std::string LLServiceBuilder::buildServiceURI(const std::string& service_name)
+{
+	std::ostringstream service_url;
+	// Find the service builder
+	if(mServiceMap.find(service_name) != mServiceMap.end())
+	{
+		// construct the service builder url
+		LLApp* app = LLApp::instance();
+		if(app)
+		{
+			// We define a base-url for some development configurations
+			// In production neither of these are defined and all services have full urls
+			LLSD base_url;
+
+			if (starts_with(service_name,"cap"))
+			{
+				base_url = app->getOption("cap-base-url");
+			}
+
+			if (base_url.asString().empty())
+			{
+				base_url = app->getOption("services-base-url");
+			}
+			service_url << base_url.asString();
+		}
+		service_url << mServiceMap[service_name];
+	}
+	else
+	{
+		llwarns << "Cannot find service " << service_name << llendl;
+	}
+	return service_url.str();
+}
+
+std::string LLServiceBuilder::buildServiceURI(
+	const std::string& service_name,
+	const LLSD& option_map)
+{
+	return russ_format(buildServiceURI(service_name), option_map);
+}
+
+std::string russ_format(const std::string& format_str, const LLSD& context)
+{
+	std::string service_url(format_str);
+	if(!service_url.empty() && context.isMap())
+	{
+		// throw in a ridiculously large limiter to make sure we don't
+		// loop forever with bad input.
+		int iterations = 100;
+		bool keep_looping = true;
+		while(keep_looping)
+		{
+			if(0 == --iterations)
+			{
+				keep_looping = false;
+			}
+
+			int depth = 0;
+			int deepest = 0;
+			bool find_match = false;
+			std::string::iterator iter(service_url.begin());
+			std::string::iterator end(service_url.end());
+			std::string::iterator deepest_node(service_url.end());
+			std::string::iterator deepest_node_end(service_url.end());
+			// parse out the variables to replace by going through {}s
+			// one at a time, starting with the "deepest" in series
+			// {{}}, and otherwise replacing right-to-left
+			for(; iter != end; ++iter)
+			{
+				switch(*iter)
+				{
+				case '{':
+					++depth;
+					if(depth > deepest)
+					{
+						deepest = depth;
+						deepest_node = iter;
+						find_match = true;
+					}
+					break;
+				case '}':
+					--depth;
+					if(find_match)
+					{
+						deepest_node_end = iter;
+						find_match = false;
+					}
+					break;
+				default:
+					break;
+				}
+			}
+			if((deepest_node == end) || (deepest_node_end == end))
+			{
+				break;
+			}
+			//replace the variable we found in the {} above.
+			// *NOTE: since the c++ implementation only understands
+			// params and straight string substitution, so it's a
+			// known distance of 2 to skip the directive.
+			std::string key(deepest_node + 2, deepest_node_end);
+			LLSD value = context[key];
+			switch(*(deepest_node + 1))
+			{
+			case '$':
+				if(value.isDefined())
+				{
+					service_url.replace(
+						deepest_node,
+						deepest_node_end + 1,
+						value.asString());
+				}
+				else
+				{
+					llwarns << "Unknown key: " << key << " in option map: "
+						<< LLSDOStreamer<LLSDNotationFormatter>(context)
+						<< llendl;
+					keep_looping = false;
+				}
+				break;
+			case '%':
+				{
+					std::string query_str = LLURI::mapToQueryString(value);
+					service_url.replace(
+						deepest_node,
+						deepest_node_end + 1,
+						query_str);
+				}
+				break;
+			default:
+				llinfos << "Unknown directive: " << *(deepest_node + 1)
+					<< llendl;
+				keep_looping = false;
+				break;
+			}
+		}
+	}
+	if (service_url.find('{') != std::string::npos)
+	{
+		llwarns << "Constructed a likely bogus service URL: " << service_url
+			<< llendl;
+	}
+	return service_url;
+}