From: Rob Smart <SMARTROB@uk.ibm.com>
Implement an osParseJSON method useful for handling simple JSON returns from http requests. This will only work in C# at this point.0.6.0-stable
Sean Dague
parent
8d6096b815
commit
1b333a0f58
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@ -2035,6 +2035,11 @@ namespace OpenSim.Region.ScriptEngine.Common
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}
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public System.Collections.Hashtable osParseJSON(string JSON)
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{
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return m_LSL_Functions.osParseJSON(JSON);
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}
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//for testing purposes only
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public void osSetParcelMediaTime(double time)
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{
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@ -25,6 +25,7 @@
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Collections;
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using OpenMetaverse;
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using Nini.Config;
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using OpenSim.Framework.Console;
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@ -582,5 +583,194 @@ namespace OpenSim.Region.ScriptEngine.Common
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{
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World.ParcelMediaSetTime((float)time);
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}
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public Hashtable osParseJSON(string JSON)
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{
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// see http://www.json.org/ for more details on JSON
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string currentKey=null;
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Stack objectStack = new Stack(); // objects in JSON can be nested so we need to keep a track of this
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Hashtable jsondata = new Hashtable(); // the hashtable to be returned
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try
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{
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// iterate through the serialised stream of tokens and store at the right depth in the hashtable
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// the top level hashtable may contain more nested hashtables within it each containing an objects representation
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for (int i=0;i<JSON.Length; i++)
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{
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// Console.WriteLine(""+JSON[i]);
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switch(JSON[i])
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{
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case '{':
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// create hashtable and add it to the stack or array if we are populating one, we can have a lot of nested objects in JSON
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Hashtable currentObject = new Hashtable();
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if(objectStack.Count==0) // the stack should only be empty for the first outer object
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{
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objectStack.Push(jsondata);
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}
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else if(objectStack.Peek().ToString()=="System.Collections.ArrayList")
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{
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// add it to the parent array
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((ArrayList)objectStack.Peek()).Add(currentObject);
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objectStack.Push(currentObject);
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}
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else
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{
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// add it to the parent hashtable
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((Hashtable)objectStack.Peek()).Add(currentKey,currentObject);
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objectStack.Push(currentObject);
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}
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// clear the key
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currentKey=null;
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break;
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case '}':
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// pop the hashtable off the stack
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objectStack.Pop();
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break;
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case '"':// string boundary
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string tokenValue="";
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i++; // move to next char
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// just loop through until the next quote mark storing the string
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while(JSON[i]!='"')
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{
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tokenValue+=JSON[i++];
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}
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// ok we've got a string, if we've got an array on the top of the stack then we store it
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if(objectStack.Peek().ToString()=="System.Collections.ArrayList")
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{
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((ArrayList)objectStack.Peek()).Add(tokenValue);
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}
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else if(currentKey==null) // no key stored and its not an array this must be a key so store it
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{
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currentKey = tokenValue;
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}
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else
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{
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// we have a key so lets store this value
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((Hashtable)objectStack.Peek()).Add(currentKey,tokenValue);
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// now lets clear the key, we're done with it and moving on
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currentKey=null;
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}
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break;
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case ':':// key : value separator
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// just ignore
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break;
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case ' ':// spaces
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// just ignore
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break;
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case '[': // array start
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ArrayList currentArray = new ArrayList();
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if(objectStack.Peek().ToString()=="System.Collections.ArrayList")
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{
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((ArrayList)objectStack.Peek()).Add(currentArray);
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}
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else
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{
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((Hashtable)objectStack.Peek()).Add(currentKey,currentArray);
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// clear the key
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currentKey=null;
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}
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objectStack.Push(currentArray);
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break;
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case ',':// seperator
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// just ignore
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break;
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case ']'://Array end
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// pop the array off the stack
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objectStack.Pop();
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break;
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case 't': // we've found a character start not in quotes, it must be a boolean true
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if(objectStack.Peek().ToString()=="System.Collections.ArrayList")
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{
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((ArrayList)objectStack.Peek()).Add(true);
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}
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else
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{
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((Hashtable)objectStack.Peek()).Add(currentKey,true);
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}
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//advance the counter to the letter 'e'
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i = i+3;
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break;
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case 'f': // we've found a character start not in quotes, it must be a boolean false
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if(objectStack.Peek().ToString()=="System.Collections.ArrayList")
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{
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((ArrayList)objectStack.Peek()).Add(false);
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}
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else
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{
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((Hashtable)objectStack.Peek()).Add(currentKey,false);
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}
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//advance the counter to the letter 'e'
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i = i+4;
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break;
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default:
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// ok here we're catching all numeric types int,double,long we might want to spit these up mr accurately
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// but for now we'll just do them as strings
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string numberValue="";
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// just loop through until the next known marker quote mark storing the string
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while(JSON[i]!='"' && JSON[i]!=',' && JSON[i]!=']' && JSON[i]!='}' && JSON[i]!=' ')
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{
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numberValue+=""+JSON[i++];
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}
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i--; // we want to process this caracter that marked the end of this string in the main loop
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// ok we've got a string, if we've got an array on the top of the stack then we store it
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if(objectStack.Peek().ToString()=="System.Collections.ArrayList")
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{
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((ArrayList)objectStack.Peek()).Add(numberValue);
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}
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else
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{
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// we have a key so lets store this value
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((Hashtable)objectStack.Peek()).Add(currentKey,numberValue);
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// now lets clear the key, we're done with it and moving on
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currentKey=null;
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}
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break;
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}
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}
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}
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catch(Exception e)
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{
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LSLError("osParseJSON: The JSON string is not valid " + JSON);
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}
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return jsondata;
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}
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}
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}
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@ -63,6 +63,8 @@ namespace OpenSim.Region.ScriptEngine.Common
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void osSetStateEvents(int events);
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void osOpenRemoteDataChannel(string channel);
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System.Collections.Hashtable osParseJSON(string JSON);
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string osGetScriptEngineName();
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void osSetParcelMediaTime(double time);
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