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/**
* @file llservicebuilder.cpp
* @brief Implementation of the LLServiceBuilder class.
*
* $LicenseInfo:firstyear=2007&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#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.c_str(), std::ios::binary);
if(service_file.is_open())
{
LLSD service_data;
LLSDSerialize::fromXMLDocument(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);
}
LL_INFOS() << "loaded config file: " << service_filename << LL_ENDL;
}
else
{
LL_WARNS() << "unable to find config file: " << service_filename << LL_ENDL;
}
}
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) const
{
std::ostringstream service_url;
// Find the service builder
std::map<std::string, std::string>::const_iterator it =
mServiceMap.find(service_name);
if(it != 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 << it->second;
}
else
{
LL_WARNS() << "Cannot find service " << service_name << LL_ENDL;
}
return service_url.str();
}
std::string LLServiceBuilder::buildServiceURI(
const std::string& service_name,
const LLSD& option_map) const
{
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
{
LL_WARNS() << "Unknown key: " << key << " in option map: "
<< LLSDOStreamer<LLSDNotationFormatter>(context)
<< LL_ENDL;
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:
LL_INFOS() << "Unknown directive: " << *(deepest_node + 1)
<< LL_ENDL;
keep_looping = false;
break;
}
}
}
if (service_url.find('{') != std::string::npos)
{
LL_WARNS() << "Constructed a likely bogus service URL: " << service_url
<< LL_ENDL;
}
return service_url;
}
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