2e76a2c72a
- Add a screenshot uri handler - Enable persistent http connections - Simple CORS implementatation for the JSON property uri handler many changes for the httpd
90 lines
3 KiB
C++
90 lines
3 KiB
C++
// JsonUriHandler.cxx -- json interface to the property tree
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//
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// Written by Torsten Dreyer, started April 2014.
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//
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// Copyright (C) 2014 Torsten Dreyer
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#include "JsonUriHandler.hxx"
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#include "jsonprops.hxx"
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#include <Main/fg_props.hxx>
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#include <simgear/props/props.hxx>
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using std::string;
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namespace flightgear {
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namespace http {
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bool JsonUriHandler::handleRequest( const HTTPRequest & request, HTTPResponse & response, Connection * connection )
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{
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response.Header["Content-Type"] = "application/json; charset=UTF-8";
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response.Header["Access-Control-Allow-Origin"] = "*";
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response.Header["Access-Control-Allow-Methods"] = "OPTIONS, GET";
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response.Header["Access-Control-Allow-Headers"] = "Origin, Accept, Content-Type, X-Requested-With, X-CSRF-Token";
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if( request.Method == "OPTIONS" ){
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return true; // OPTIONS only needs the headers
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}
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if( request.Method != "GET" ){
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response.Header["Allow"] = "OPTIONS, GET";
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response.StatusCode = 405;
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response.Content = "{}";
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return true;
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}
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string propertyPath = request.Uri;
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// strip the uri prefix of our handler
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propertyPath = propertyPath.substr( getUri().size() );
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// strip the querystring
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size_t pos = propertyPath.find( '?' );
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if( pos != string::npos ) {
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propertyPath = propertyPath.substr( 0, pos-1 );
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}
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// skip trailing '/' - not very efficient but shouldn't happen too often
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while( false == propertyPath.empty() && propertyPath[ propertyPath.length()-1 ] == '/' )
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propertyPath = propertyPath.substr(0,propertyPath.length()-1);
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// max recursion depth
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int depth = atoi(request.RequestVariables.get("d").c_str());
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if( depth < 1 ) depth = 1; // at least one level
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// pretty print (y) or compact print (default)
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bool indent = request.RequestVariables.get("i") == "y";
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bool timestamp = request.RequestVariables.get("t") == "y";
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SGPropertyNode_ptr node = fgGetNode( string("/") + propertyPath );
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if( false == node.valid() ) {
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response.StatusCode = 404;
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response.Content = "{}";
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SG_LOG(SG_NETWORK,SG_WARN, "Node not found: '" << propertyPath << "'");
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return true;
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}
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response.Content = JSON::toJsonString( indent, node, depth, timestamp ? fgGetDouble("/sim/time/elapsed-sec") : -1.0 );
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return true;
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}
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} // namespace http
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} // namespace flightgear
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