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Make JsonStore path parsing more robust. Should fix the 

invalid path problem.
0.7.4-extended
Mic Bowman 2013-02-08 22:43:15 -08:00 committed by Justin Clark-Casey (justincc)
parent 7fc820b3fd
commit 5a2895977a
2 changed files with 69 additions and 31 deletions
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86
OpenSim/Region/OptionalModules/Scripting/JsonStore/JsonStore.cs
View File

@ -49,7 +49,7 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
private static readonly ILog m_log =
LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
private OSD m_ValueStore;
protected virtual OSD ValueStore { get; set; }
protected class TakeValueCallbackClass
{
@ -81,7 +81,7 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
protected static Regex m_ParsePassFour = new Regex("\\.+");
// expression used to validate the full path, this is canonical representation
protected static Regex m_ValidatePath = new Regex("^\\.(({[^}]+}|\\[[0-9]+\\]|\\[\\+\\])\\.)+$");
protected static Regex m_ValidatePath = new Regex("^\\.(({[^}]+}|\\[[0-9]+\\]|\\[\\+\\])\\.)*$");
// expression used to match path components
protected static Regex m_PathComponent = new Regex("\\.({[^}]+}|\\[[0-9]+\\]|\\[\\+\\]+)");
@ -98,9 +98,17 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
///
/// </summary>
// -----------------------------------------------------------------
public static string CanonicalPathExpression(string path)
public static bool CanonicalPathExpression(string ipath, out string opath)
{
return PathExpressionToKey(ParsePathExpression(path));
Stack<string> path;
if (! ParsePathExpression(ipath,out path))
{
opath = "";
return false;
}
opath = PathExpressionToKey(path);
return true;
}
public JsonStore(string value)
@ -109,9 +117,9 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
m_ReadStore = new List<TakeValueCallbackClass>();
if (String.IsNullOrEmpty(value))
m_ValueStore = new OSDMap();
ValueStore = new OSDMap();
else
m_ValueStore = OSDParser.DeserializeJson(value);
ValueStore = OSDParser.DeserializeJson(value);
}
// -----------------------------------------------------------------
@ -121,8 +129,11 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
// -----------------------------------------------------------------
public bool TestPath(string expr, bool useJson)
{
Stack<string> path = ParsePathExpression(expr);
OSD result = ProcessPathExpression(m_ValueStore,path);
Stack<string> path;
if (! ParsePathExpression(expr,out path))
return false;
OSD result = ProcessPathExpression(ValueStore,path);
if (result == null)
return false;
@ -140,8 +151,14 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
// -----------------------------------------------------------------
public bool GetValue(string expr, out string value, bool useJson)
{
Stack<string> path = ParsePathExpression(expr);
OSD result = ProcessPathExpression(m_ValueStore,path);
Stack<string> path;
if (! ParsePathExpression(expr,out path))
{
value = "";
return false;
}
OSD result = ProcessPathExpression(ValueStore,path);
return ConvertOutputValue(result,out value,useJson);
}
@ -174,10 +191,13 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
// -----------------------------------------------------------------
public bool TakeValue(string expr, bool useJson, TakeValueCallback cback)
{
Stack<string> path = ParsePathExpression(expr);
Stack<string> path;
if (! ParsePathExpression(expr,out path))
return false;
string pexpr = PathExpressionToKey(path);
OSD result = ProcessPathExpression(m_ValueStore,path);
OSD result = ProcessPathExpression(ValueStore,path);
if (result == null)
{
m_TakeStore.Add(new TakeValueCallbackClass(pexpr,useJson,cback));
@ -205,10 +225,13 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
// -----------------------------------------------------------------
public bool ReadValue(string expr, bool useJson, TakeValueCallback cback)
{
Stack<string> path = ParsePathExpression(expr);
Stack<string> path;
if (! ParsePathExpression(expr,out path))
return false;
string pexpr = PathExpressionToKey(path);
OSD result = ProcessPathExpression(m_ValueStore,path);
OSD result = ProcessPathExpression(ValueStore,path);
if (result == null)
{
m_ReadStore.Add(new TakeValueCallbackClass(pexpr,useJson,cback));
@ -235,10 +258,13 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
// -----------------------------------------------------------------
protected bool SetValueFromExpression(string expr, OSD ovalue)
{
Stack<string> path = ParsePathExpression(expr);
Stack<string> path;
if (! ParsePathExpression(expr,out path))
return false;
if (path.Count == 0)
{
m_ValueStore = ovalue;
ValueStore = ovalue;
return true;
}
@ -249,7 +275,7 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
if (pexpr != "")
pexpr += ".";
OSD result = ProcessPathExpression(m_ValueStore,path);
OSD result = ProcessPathExpression(ValueStore,path);
if (result == null)
return false;
@ -366,34 +392,36 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
/// use a stack because we process the path in inverse order later
/// </summary>
// -----------------------------------------------------------------
protected static Stack<string> ParsePathExpression(string path)
protected static bool ParsePathExpression(string expr, out Stack<string> path)
{
Stack<string> m_path = new Stack<string>();
path = new Stack<string>();
// add front and rear separators
path = "." + path + ".";
expr = "." + expr + ".";
// add separators for quoted paths
path = m_ParsePassOne.Replace(path,".$0.",-1,0);
// add separators for quoted exprs
expr = m_ParsePassOne.Replace(expr,".$0.",-1,0);
// add separators for array references
path = m_ParsePassTwo.Replace(path,".$0.",-1,0);
expr = m_ParsePassTwo.Replace(expr,".$0.",-1,0);
// add quotes to bare identifier
path = m_ParsePassThree.Replace(path,".{$1}",-1,0);
expr = m_ParsePassThree.Replace(expr,".{$1}",-1,0);
// remove extra separators
path = m_ParsePassFour.Replace(path,".",-1,0);
expr = m_ParsePassFour.Replace(expr,".",-1,0);
// validate the results (catches extra quote characters for example)
if (m_ValidatePath.IsMatch(path))
if (m_ValidatePath.IsMatch(expr))
{
MatchCollection matches = m_PathComponent.Matches(path,0);
MatchCollection matches = m_PathComponent.Matches(expr,0);
foreach (Match match in matches)
m_path.Push(match.Groups[1].Value);
path.Push(match.Groups[1].Value);
return true;
}
return m_path;
return false;
}
// -----------------------------------------------------------------

12
OpenSim/Region/OptionalModules/Scripting/JsonStore/JsonStoreScriptModule.cs
View File

@ -285,7 +285,16 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
[ScriptInvocation]
public string JsonList2Path(UUID hostID, UUID scriptID, object[] pathlist)
{
return JsonStore.CanonicalPathExpression(ConvertList2Path(pathlist));
string ipath = ConvertList2Path(pathlist);
string opath;
if (JsonStore.CanonicalPathExpression(ipath,out opath))
return opath;
// This won't parse if passed to the other routines as opposed to
// returning an empty string which is a valid path and would overwrite
// the entire store
return "**INVALID**";
}
// -----------------------------------------------------------------
@ -405,6 +414,7 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
// -----------------------------------------------------------------
protected void GenerateRuntimeError(string msg)
{
m_log.InfoFormat("[JsonStore] runtime error: {0}",msg);
throw new Exception("JsonStore Runtime Error: " + msg);
}