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authorSean Dague2008-09-12 15:04:13 +0000
committerSean Dague2008-09-12 15:04:13 +0000
commit1b333a0f58d345d37222eb1af821e6ebd457378c (patch)
treea3f6af065f3b92a2282d7ddb320349237c7dec2a /OpenSim/Region/ScriptEngine/Common
parentMantis#2165. Thank you kindly, CMickeyB for a patch that: (diff)
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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.
Diffstat (limited to 'OpenSim/Region/ScriptEngine/Common')
-rw-r--r--OpenSim/Region/ScriptEngine/Common/BuiltIn_Commands_BaseClass.cs5
-rw-r--r--OpenSim/Region/ScriptEngine/Common/OSSL_BuilIn_Commands.cs190
-rw-r--r--OpenSim/Region/ScriptEngine/Common/OSSL_BuilIn_Commands_Interface.cs2
3 files changed, 197 insertions, 0 deletions
diff --git a/OpenSim/Region/ScriptEngine/Common/BuiltIn_Commands_BaseClass.cs b/OpenSim/Region/ScriptEngine/Common/BuiltIn_Commands_BaseClass.cs
index 4fba1fd..1b7cc48 100644
--- a/OpenSim/Region/ScriptEngine/Common/BuiltIn_Commands_BaseClass.cs
+++ b/OpenSim/Region/ScriptEngine/Common/BuiltIn_Commands_BaseClass.cs
@@ -2035,6 +2035,11 @@ namespace OpenSim.Region.ScriptEngine.Common
2035 } 2035 }
2036 2036
2037 2037
2038 public System.Collections.Hashtable osParseJSON(string JSON)
2039 {
2040 return m_LSL_Functions.osParseJSON(JSON);
2041 }
2042
2038 //for testing purposes only 2043 //for testing purposes only
2039 public void osSetParcelMediaTime(double time) 2044 public void osSetParcelMediaTime(double time)
2040 { 2045 {
diff --git a/OpenSim/Region/ScriptEngine/Common/OSSL_BuilIn_Commands.cs b/OpenSim/Region/ScriptEngine/Common/OSSL_BuilIn_Commands.cs
index 8b5e879..6c7b9da 100644
--- a/OpenSim/Region/ScriptEngine/Common/OSSL_BuilIn_Commands.cs
+++ b/OpenSim/Region/ScriptEngine/Common/OSSL_BuilIn_Commands.cs
@@ -25,6 +25,7 @@
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */ 26 */
27using System; 27using System;
28using System.Collections;
28using OpenMetaverse; 29using OpenMetaverse;
29using Nini.Config; 30using Nini.Config;
30using OpenSim.Framework.Console; 31using OpenSim.Framework.Console;
@@ -582,5 +583,194 @@ namespace OpenSim.Region.ScriptEngine.Common
582 { 583 {
583 World.ParcelMediaSetTime((float)time); 584 World.ParcelMediaSetTime((float)time);
584 } 585 }
586
587 public Hashtable osParseJSON(string JSON)
588 {
589 // see http://www.json.org/ for more details on JSON
590
591 string currentKey=null;
592 Stack objectStack = new Stack(); // objects in JSON can be nested so we need to keep a track of this
593 Hashtable jsondata = new Hashtable(); // the hashtable to be returned
594
595 try
596 {
597
598 // iterate through the serialised stream of tokens and store at the right depth in the hashtable
599 // the top level hashtable may contain more nested hashtables within it each containing an objects representation
600 for (int i=0;i<JSON.Length; i++)
601 {
602
603 // Console.WriteLine(""+JSON[i]);
604 switch(JSON[i])
605 {
606 case '{':
607 // 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
608
609 Hashtable currentObject = new Hashtable();
610 if(objectStack.Count==0) // the stack should only be empty for the first outer object
611 {
612
613 objectStack.Push(jsondata);
614 }
615 else if(objectStack.Peek().ToString()=="System.Collections.ArrayList")
616 {
617 // add it to the parent array
618 ((ArrayList)objectStack.Peek()).Add(currentObject);
619 objectStack.Push(currentObject);
620 }
621 else
622 {
623 // add it to the parent hashtable
624 ((Hashtable)objectStack.Peek()).Add(currentKey,currentObject);
625 objectStack.Push(currentObject);
626 }
627
628 // clear the key
629 currentKey=null;
630 break;
631 case '}':
632 // pop the hashtable off the stack
633 objectStack.Pop();
634 break;
635 case '"':// string boundary
636
637 string tokenValue="";
638 i++; // move to next char
639
640 // just loop through until the next quote mark storing the string
641 while(JSON[i]!='"')
642 {
643 tokenValue+=JSON[i++];
644 }
645
646 // ok we've got a string, if we've got an array on the top of the stack then we store it
647 if(objectStack.Peek().ToString()=="System.Collections.ArrayList")
648 {
649 ((ArrayList)objectStack.Peek()).Add(tokenValue);
650 }
651 else if(currentKey==null) // no key stored and its not an array this must be a key so store it
652 {
653 currentKey = tokenValue;
654 }
655 else
656 {
657 // we have a key so lets store this value
658 ((Hashtable)objectStack.Peek()).Add(currentKey,tokenValue);
659 // now lets clear the key, we're done with it and moving on
660 currentKey=null;
661 }
662
663 break;
664 case ':':// key : value separator
665 // just ignore
666 break;
667 case ' ':// spaces
668 // just ignore
669 break;
670 case '[': // array start
671 ArrayList currentArray = new ArrayList();
672
673 if(objectStack.Peek().ToString()=="System.Collections.ArrayList")
674 {
675 ((ArrayList)objectStack.Peek()).Add(currentArray);
676 }
677 else
678 {
679 ((Hashtable)objectStack.Peek()).Add(currentKey,currentArray);
680 // clear the key
681 currentKey=null;
682 }
683 objectStack.Push(currentArray);
684
685 break;
686 case ',':// seperator
687 // just ignore
688 break;
689 case ']'://Array end
690 // pop the array off the stack
691 objectStack.Pop();
692 break;
693 case 't': // we've found a character start not in quotes, it must be a boolean true
694
695 if(objectStack.Peek().ToString()=="System.Collections.ArrayList")
696 {
697 ((ArrayList)objectStack.Peek()).Add(true);
698 }
699 else
700 {
701 ((Hashtable)objectStack.Peek()).Add(currentKey,true);
702 }
703
704 //advance the counter to the letter 'e'
705 i = i+3;
706 break;
707 case 'f': // we've found a character start not in quotes, it must be a boolean false
708
709 if(objectStack.Peek().ToString()=="System.Collections.ArrayList")
710 {
711 ((ArrayList)objectStack.Peek()).Add(false);
712 }
713 else
714 {
715 ((Hashtable)objectStack.Peek()).Add(currentKey,false);
716 }
717 //advance the counter to the letter 'e'
718 i = i+4;
719 break;
720 default:
721 // ok here we're catching all numeric types int,double,long we might want to spit these up mr accurately
722 // but for now we'll just do them as strings
723
724 string numberValue="";
725
726 // just loop through until the next known marker quote mark storing the string
727 while(JSON[i]!='"' && JSON[i]!=',' && JSON[i]!=']' && JSON[i]!='}' && JSON[i]!=' ')
728 {
729 numberValue+=""+JSON[i++];
730 }
731
732 i--; // we want to process this caracter that marked the end of this string in the main loop
733
734 // ok we've got a string, if we've got an array on the top of the stack then we store it
735 if(objectStack.Peek().ToString()=="System.Collections.ArrayList")
736 {
737 ((ArrayList)objectStack.Peek()).Add(numberValue);
738 }
739 else
740 {
741 // we have a key so lets store this value
742 ((Hashtable)objectStack.Peek()).Add(currentKey,numberValue);
743 // now lets clear the key, we're done with it and moving on
744 currentKey=null;
745 }
746
747
748 break;
749 }
750
751
752
753
754 }
755
756 }
757 catch(Exception e)
758 {
759 LSLError("osParseJSON: The JSON string is not valid " + JSON);
760 }
761
762 return jsondata;
763
764
765 }
766
767
768
769
770
771
772
773
774
585 } 775 }
586} 776}
diff --git a/OpenSim/Region/ScriptEngine/Common/OSSL_BuilIn_Commands_Interface.cs b/OpenSim/Region/ScriptEngine/Common/OSSL_BuilIn_Commands_Interface.cs
index bbc6d2d..7daef7d 100644
--- a/OpenSim/Region/ScriptEngine/Common/OSSL_BuilIn_Commands_Interface.cs
+++ b/OpenSim/Region/ScriptEngine/Common/OSSL_BuilIn_Commands_Interface.cs
@@ -63,6 +63,8 @@ namespace OpenSim.Region.ScriptEngine.Common
63 void osSetStateEvents(int events); 63 void osSetStateEvents(int events);
64 64
65 void osOpenRemoteDataChannel(string channel); 65 void osOpenRemoteDataChannel(string channel);
66
67 System.Collections.Hashtable osParseJSON(string JSON);
66 68
67 string osGetScriptEngineName(); 69 string osGetScriptEngineName();
68 void osSetParcelMediaTime(double time); 70 void osSetParcelMediaTime(double time);