' VBJSON is a VB6 adaptation of the VBA JSON project at http://code.google.com/p/vba-json/
' Some bugs fixed, speed improvements added for VB6 by Michael Glaser (vbjson@ediy.co.nz)
' BSD Licensed
‘cJSONScript
Option Explicit
Const INVALID_JSON As Long = 1
Const INVALID_OBJECT As Long = 2
Const INVALID_ARRAY As Long = 3
Const INVALID_BOOLEAN As Long = 4
Const INVALID_NULL As Long = 5
Const INVALID_KEY As Long = 6
Const INVALID_RPC_CALL As Long = 7
Private psErrors As String
Public Function GetParserErrors() As String
GetParserErrors = psErrors
End Function
Public Function ClearParserErrors() As String
psErrors = ""
End Function
'
' parse string and create JSON object
'
Public Function parse(ByRef str As String) As Object
Dim index As Long
index = 1
psErrors = ""
On Error Resume Next
Call skipChar(str, index)
Select Case Mid(str, index, 1)
Case "{"
Set parse = parseObject(str, index)
Case "["
Set parse = parseArray(str, index)
Case Else
psErrors = "Invalid JSON"
End Select
End Function
'
' parse collection of key/value
'
Private Function parseObject(ByRef str As String, ByRef index As Long) As Dictionary
Set parseObject = New Dictionary
Dim sKey As String
' "{"
Call skipChar(str, index)
If Mid(str, index, 1) <> "{" Then
psErrors = psErrors & "Invalid Object at position " & index & " : " & Mid(str, index) & vbCrLf
Exit Function
End If
index = index + 1
Do
Call skipChar(str, index)
If "}" = Mid(str, index, 1) Then
index = index + 1
Exit Do
ElseIf "," = Mid(str, index, 1) Then
index = index + 1
Call skipChar(str, index)
ElseIf index > Len(str) Then
psErrors = psErrors & "Missing '}': " & Right(str, 20) & vbCrLf
Exit Do
End If
' add key/value pair
sKey = parseKey(str, index)
On Error Resume Next
parseObject.Add sKey, parseValue(str, index)
If Err.Number <> 0 Then
psErrors = psErrors & Err.Description & ": " & sKey & vbCrLf
Exit Do
End If
Loop
eh:
End Function
'
' parse list
'
Private Function parseArray(ByRef str As String, ByRef index As Long) As Collection
Set parseArray = New Collection
' "["
Call skipChar(str, index)
If Mid(str, index, 1) <> "[" Then
psErrors = psErrors & "Invalid Array at position " & index & " : " + Mid(str, index, 20) & vbCrLf
Exit Function
End If
index = index + 1
Do
Call skipChar(str, index)
If "]" = Mid(str, index, 1) Then
index = index + 1
Exit Do
ElseIf "," = Mid(str, index, 1) Then
index = index + 1
Call skipChar(str, index)
ElseIf index > Len(str) Then
psErrors = psErrors & "Missing ']': " & Right(str, 20) & vbCrLf
Exit Do
End If
' add value
On Error Resume Next
parseArray.Add parseValue(str, index)
If Err.Number <> 0 Then
psErrors = psErrors & Err.Description & ": " & Mid(str, index, 20) & vbCrLf
Exit Do
End If
Loop
End Function
'
' parse string / number / object / array / true / false / null
'
Private Function parseValue(ByRef str As String, ByRef index As Long)
Call skipChar(str, index)
Select Case Mid(str, index, 1)
Case "{"
Set parseValue = parseObject(str, index)
Case "["
Set parseValue = parseArray(str, index)
Case """", "'"
parseValue = parseString(str, index)
Case "t", "f"
parseValue = parseBoolean(str, index)
Case "n"
parseValue = parseNull(str, index)
Case Else
parseValue = parseNumber(str, index)
End Select
End Function
'
' parse string
'
Private Function parseString(ByRef str As String, ByRef index As Long) As String
Dim quote As String
Dim Char As String
Dim Code As String
Dim SB As New cStringBuilder
Call skipChar(str, index)
quote = Mid(str, index, 1)
index = index + 1
Do While index > 0 And index <= Len(str)
Char = Mid(str, index, 1)
Select Case (Char)
Case "\"
index = index + 1
Char = Mid(str, index, 1)
Select Case (Char)
Case """", "\", "/", "'"
SB.Append Char
index = index + 1
Case "b"
SB.Append vbBack
index = index + 1
Case "f"
SB.Append vbFormFeed
index = index + 1
Case "n"
SB.Append vbLf
index = index + 1
Case "r"
SB.Append vbCr
index = index + 1
Case "t"
SB.Append vbTab
index = index + 1
Case "u"
index = index + 1
Code = Mid(str, index, 4)
SB.Append ChrW(Val("&h" + Code))
index = index + 4
End Select
Case quote
index = index + 1
parseString = SB.toString
Set SB = Nothing
Exit Function
Case Else
SB.Append Char
index = index + 1
End Select
Loop
parseString = SB.toString
Set SB = Nothing
End Function
'
' parse number
'
Private Function parseNumber(ByRef str As String, ByRef index As Long)
Dim Value As String
Dim Char As String
Call skipChar(str, index)
Do While index > 0 And index <= Len(str)
Char = Mid(str, index, 1)
If InStr("+-0123456789.eE", Char) Then
Value = Value & Char
index = index + 1
Else
parseNumber = CDec(Value)
Exit Function
End If
Loop
End Function
'
' parse true / false
'
Private Function parseBoolean(ByRef str As String, ByRef index As Long) As Boolean
Call skipChar(str, index)
If Mid(str, index, 4) = "true" Then
parseBoolean = True
index = index + 4
ElseIf Mid(str, index, 5) = "false" Then
parseBoolean = False
index = index + 5
Else
psErrors = psErrors & "Invalid Boolean at position " & index & " : " & Mid(str, index) & vbCrLf
End If
End Function
'
' parse null
'
Private Function parseNull(ByRef str As String, ByRef index As Long)
Call skipChar(str, index)
If Mid(str, index, 4) = "null" Then
parseNull = Null
index = index + 4
Else
psErrors = psErrors & "Invalid null value at position " & index & " : " & Mid(str, index) & vbCrLf
End If
End Function
Private Function parseKey(ByRef str As String, ByRef index As Long) As String
Dim dquote As Boolean
Dim squote As Boolean
Dim Char As String
Call skipChar(str, index)
Do While index > 0 And index <= Len(str)
Char = Mid(str, index, 1)
Select Case (Char)
Case """"
dquote = Not dquote
index = index + 1
If Not dquote Then
Call skipChar(str, index)
If Mid(str, index, 1) <> ":" Then
psErrors = psErrors & "Invalid Key at position " & index & " : " & parseKey & vbCrLf
Exit Do
End If
End If
Case "'"
squote = Not squote
index = index + 1
If Not squote Then
Call skipChar(str, index)
If Mid(str, index, 1) <> ":" Then
psErrors = psErrors & "Invalid Key at position " & index & " : " & parseKey & vbCrLf
Exit Do
End If
End If
Case ":"
index = index + 1
If Not dquote And Not squote Then
Exit Do
Else
parseKey = parseKey & Char
End If
Case Else
If InStr(vbCrLf & vbCr & vbLf & vbTab & " ", Char) Then
Else
parseKey = parseKey & Char
End If
index = index + 1
End Select
Loop
End Function
'
' skip special character
'
Private Sub skipChar(ByRef str As String, ByRef index As Long)
Dim bComment As Boolean
Dim bStartComment As Boolean
Dim bLongComment As Boolean
Do While index > 0 And index <= Len(str)
Select Case Mid(str, index, 1)
Case vbCr, vbLf
If Not bLongComment Then
bStartComment = False
bComment = False
End If
Case vbTab, " ", "(", ")"
Case "/"
If Not bLongComment Then
If bStartComment Then
bStartComment = False
bComment = True
Else
bStartComment = True
bComment = False
bLongComment = False
End If
Else
If bStartComment Then
bLongComment = False
bStartComment = False
bComment = False
End If
End If
Case "*"
If bStartComment Then
bStartComment = False
bComment = True
bLongComment = True
Else
bStartComment = True
End If
Case Else
If Not bComment Then
Exit Do
End If
End Select
index = index + 1
Loop
End Sub
Public Function toString(ByRef obj As Variant) As String
Dim SB As New cStringBuilder
Select Case VarType(obj)
Case vbNull
SB.Append "null"
Case vbDate
SB.Append """" & CStr(obj) & """"
Case vbString
SB.Append """" & Encode(obj) & """"
Case vbObject
Dim bFI As Boolean
Dim i As Long
bFI = True
If TypeName(obj) = "Dictionary" Then
SB.Append "{"
Dim keys
keys = obj.keys
For i = 0 To obj.Count - 1
If bFI Then bFI = False Else SB.Append ","
Dim key
key = keys(i)
SB.Append """" & key & """:" & toString(obj.item(key))
Next i
SB.Append "}"
ElseIf TypeName(obj) = "Collection" Then
SB.Append "["
Dim Value
For Each Value In obj
If bFI Then bFI = False Else SB.Append ","
SB.Append toString(Value)
Next Value
SB.Append "]"
End If
Case vbBoolean
If obj Then SB.Append "true" Else SB.Append "false"
Case vbVariant, vbArray, vbArray + vbVariant
Dim sEB
SB.Append multiArray(obj, 1, "", sEB)
Case Else
SB.Append Replace(obj, ",", ".")
End Select
toString = SB.toString
Set SB = Nothing
End Function
Private Function Encode(str) As String
Dim SB As New cStringBuilder
Dim i As Long
Dim j As Long
Dim aL1 As Variant
Dim aL2 As Variant
Dim c As String
Dim p As Boolean
aL1 = Array(&H22, &H5C, &H2F, &H8, &HC, &HA, &HD, &H9)
aL2 = Array(&H22, &H5C, &H2F, &H62, &H66, &H6E, &H72, &H74)
For i = 1 To Len(str)
p = True
c = Mid(str, i, 1)
For j = 0 To 7
If c = Chr(aL1(j)) Then
SB.Append "\" & Chr(aL2(j))
p = False
Exit For
End If
Next
If p Then
Dim a
a = AscW(c)
If a > 31 And a < 127 Then
SB.Append c
ElseIf a > -1 Or a < 65535 Then
SB.Append "\u" & String(4 - Len(Hex(a)), "0") & Hex(a)
End If
End If
Next
Encode = SB.toString
Set SB = Nothing
End Function
Private Function multiArray(aBD, iBC, sPS, ByRef sPT) ' Array BoDy, Integer BaseCount, String PoSition
Dim iDU As Long
Dim iDL As Long
Dim i As Long
On Error Resume Next
iDL = LBound(aBD, iBC)
iDU = UBound(aBD, iBC)
Dim SB As New cStringBuilder
Dim sPB1, sPB2 ' String PointBuffer1, String PointBuffer2
If Err.Number = 9 Then
sPB1 = sPT & sPS
For i = 1 To Len(sPB1)
If i <> 1 Then sPB2 = sPB2 & ","
sPB2 = sPB2 & Mid(sPB1, i, 1)
Next
' multiArray = multiArray & toString(Eval("aBD(" & sPB2 & ")"))
SB.Append toString(aBD(sPB2))
Else
sPT = sPT & sPS
SB.Append "["
For i = iDL To iDU
SB.Append multiArray(aBD, iBC + 1, i, sPT)
If i < iDU Then SB.Append ","
Next
SB.Append "]"
sPT = Left(sPT, iBC - 2)
End If
Err.Clear
multiArray = SB.toString
Set SB = Nothing
End Function
' Miscellaneous JSON functions
Public Function StringToJSON(st As String) As String
Const FIELD_SEP = "~"
Const RECORD_SEP = "|"
Dim sFlds As String
Dim sRecs As New cStringBuilder
Dim lRecCnt As Long
Dim lFld As Long
Dim fld As Variant
Dim rows As Variant
lRecCnt = 0
If st = "" Then
StringToJSON = "null"
Else
rows = Split(st, RECORD_SEP)
For lRecCnt = LBound(rows) To UBound(rows)
sFlds = ""
fld = Split(rows(lRecCnt), FIELD_SEP)
For lFld = LBound(fld) To UBound(fld) Step 2
sFlds = (sFlds & IIf(sFlds <> "", ",", "") & """" & fld(lFld) & """:""" & toUnicode(fld(lFld + 1) & "") & """")
Next 'fld
sRecs.Append IIf((Trim(sRecs.toString) <> ""), "," & vbCrLf, "") & "{" & sFlds & "}"
Next 'rec
StringToJSON = ("( {""Records"": [" & vbCrLf & sRecs.toString & vbCrLf & "], " & """RecordCount"":""" & lRecCnt & """ } )")
End If
End Function
Public Function RStoJSON(rs As ADODB.Recordset) As String
On Error GoTo errHandler
Dim sFlds As String
Dim sRecs As New cStringBuilder
Dim lRecCnt As Long
Dim fld As ADODB.Field
lRecCnt = 0
If rs.State = adStateClosed Then
RStoJSON = "null"
Else
If rs.EOF Or rs.BOF Then
RStoJSON = "null"
Else
Do While Not rs.EOF And Not rs.BOF
lRecCnt = lRecCnt + 1
sFlds = ""
For Each fld In rs.Fields
sFlds = (sFlds & IIf(sFlds <> "", ",", "") & """" & fld.Name & """:""" & toUnicode(fld.Value & "") & """")
Next 'fld
sRecs.Append IIf((Trim(sRecs.toString) <> ""), "," & vbCrLf, "") & "{" & sFlds & "}"
rs.MoveNext
Loop
RStoJSON = ("( {""Records"": [" & vbCrLf & sRecs.toString & vbCrLf & "], " & """RecordCount"":""" & lRecCnt & """ } )")
End If
End If
Exit Function
errHandler:
End Function
'Public Function JsonRpcCall(url As String, methName As String, args(), Optional user As String, Optional pwd As String) As Object
' Dim r As Object
' Dim cli As Object
' Dim pText As String
' Static reqId As Integer
'
' reqId = reqId + 1
'
' Set r = CreateObject("Scripting.Dictionary")
' r("jsonrpc") = "2.0"
' r("method") = methName
' r("params") = args
' r("id") = reqId
'
' pText = toString(r)
'
' Set cli = CreateObject("MSXML2.XMLHTTP.6.0")
' ' Set cli = New MSXML2.XMLHTTP60
' If Len(user) > 0 Then ' If Not IsMissing(user) Then
' cli.Open "POST", url, False, user, pwd
' Else
' cli.Open "POST", url, False
' End If
' cli.setRequestHeader "Content-Type", "application/json"
' cli.Send pText
'
' If cli.Status <> 200 Then
' Err.Raise vbObjectError + INVALID_RPC_CALL + cli.Status, , cli.statusText
' End If
'
' Set r = parse(cli.responseText)
' Set cli = Nothing
'
' If r("id") <> reqId Then Err.Raise vbObjectError + INVALID_RPC_CALL, , "Bad Response id"
'
' If r.Exists("error") Or Not r.Exists("result") Then
' Err.Raise vbObjectError + INVALID_RPC_CALL, , "Json-Rpc Response error: " & r("error")("message")
' End If
'
' If Not r.Exists("result") Then Err.Raise vbObjectError + INVALID_RPC_CALL, , "Bad Response, missing result"
'
' Set JsonRpcCall = r("result")
'End Function
Public Function toUnicode(str As String) As String
Dim x As Long
Dim uStr As New cStringBuilder
Dim uChrCode As Integer
For x = 1 To Len(str)
uChrCode = Asc(Mid(str, x, 1))
Select Case uChrCode
Case 8: ' backspace
uStr.Append "\b"
Case 9: ' tab
uStr.Append "\t"
Case 10: ' line feed
uStr.Append "\n"
Case 12: ' formfeed
uStr.Append "\f"
Case 13: ' carriage return
uStr.Append "\r"
Case 34: ' quote
uStr.Append "\"""
Case 39: ' apostrophe
uStr.Append "\'"
Case 92: ' backslash
uStr.Append "\\"
Case 123, 125: ' "{" and "}"
uStr.Append ("\u" & Right("0000" & Hex(uChrCode), 4))
Case Is < 32, Is > 127: ' non-ascii characters
uStr.Append ("\u" & Right("0000" & Hex(uChrCode), 4))
Case Else
uStr.Append Chr$(uChrCode)
End Select
Next
toUnicode = uStr.toString
Exit Function
End Function
Private Sub Class_Initialize()
psErrors = ""
End Sub
Option Explicit
Dim dictVars As New Dictionary
Dim plNestCount As Long
Public Function Eval(sJSON As String) As String
Dim SB As New cStringBuilder
Dim o As Object
Dim c As Object
Dim i As Long
Set o = JSON.parse(sJSON)
If (JSON.GetParserErrors = "") And Not (o Is Nothing) Then
For i = 1 To o.Count
Select Case VarType(o.item(i))
Case vbNull
SB.Append "null"
Case vbDate
SB.Append CStr(o.item(i))
Case vbString
SB.Append CStr(o.item(i))
Case Else
Set c = o.item(i)
SB.Append ExecCommand(c)
End Select
Next
Else
MsgBox JSON.GetParserErrors, vbExclamation, "Parser Error"
End If
Eval = SB.toString
End Function
Public Function ExecCommand(ByRef obj As Variant) As String
Dim SB As New cStringBuilder
If plNestCount > 40 Then
ExecCommand = "ERROR: Nesting level exceeded."
Else
plNestCount = plNestCount + 1
Select Case VarType(obj)
Case vbNull
SB.Append "null"
Case vbDate
SB.Append CStr(obj)
Case vbString
SB.Append CStr(obj)
Case vbObject
Dim i As Long
Dim j As Long
Dim this As Object
Dim key
Dim paramKeys
If TypeName(obj) = "Dictionary" Then
Dim sOut As String
Dim sRet As String
Dim keys
keys = obj.keys
For i = 0 To obj.Count - 1
sRet = ""
key = keys(i)
If VarType(obj.item(key)) = vbString Then
sRet = obj.item(key)
Else
Set this = obj.item(key)
End If
' command implementation
Select Case LCase(key)
Case "alert":
MsgBox ExecCommand(this.item("message")), vbInformation, ExecCommand(this.item("title"))
Case "input":
SB.Append InputBox(ExecCommand(this.item("prompt")), ExecCommand(this.item("title")), ExecCommand(this.item("default")))
Case "switch"
sOut = ExecCommand(this.item("default"))
sRet = LCase(ExecCommand(this.item("case")))
For j = 0 To this.item("items").Count - 1
If LCase(this.item("items").item(j + 1).item("case")) = sRet Then
sOut = ExecCommand(this.item("items").item(j + 1).item("return"))
Exit For
End If
Next
SB.Append sOut
Case "set":
If dictVars.Exists(this.item("name")) Then
dictVars.item(this.item("name")) = ExecCommand(this.item("value"))
Else
dictVars.Add this.item("name"), ExecCommand(this.item("value"))
End If
Case "get":
sRet = ExecCommand(dictVars(CStr(this.item("name"))))
If sRet = "" Then
sRet = ExecCommand(this.item("default"))
End If
SB.Append sRet
Case "if"
Dim val1 As String
Dim val2 As String
Dim bRes As Boolean
val1 = ExecCommand(this.item("value1"))
val2 = ExecCommand(this.item("value2"))
bRes = False
Select Case LCase(this.item("type"))
Case "eq" ' =
If LCase(val1) = LCase(val2) Then
bRes = True
End If
Case "gt" ' >
If val1 > val2 Then
bRes = True
End If
Case "lt" ' <
If val1 < val2 Then
bRes = True
End If
Case "gte" ' >=
If val1 >= val2 Then
bRes = True
End If
Case "lte" ' <=
If val1 <= val2 Then
bRes = True
End If
End Select
If bRes Then
SB.Append ExecCommand(this.item("true"))
Else
SB.Append ExecCommand(this.item("false"))
End If
Case "return"
SB.Append obj.item(key)
Case Else
If TypeName(this) = "Dictionary" Then
paramKeys = this.keys
For j = 0 To this.Count - 1
If j > 0 Then
sRet = sRet & ","
End If
sRet = sRet & CStr(this.item(paramKeys(j)))
Next
End If
SB.Append "<%" & UCase(key) & "(" & sRet & ")%>"
End Select
Next i
ElseIf TypeName(obj) = "Collection" Then
Dim Value
For Each Value In obj
SB.Append ExecCommand(Value)
Next Value
End If
Set this = Nothing
Case vbBoolean
If obj Then SB.Append "true" Else SB.Append "false"
Case vbVariant, vbArray, vbArray + vbVariant
Case Else
SB.Append Replace(obj, ",", ".")
End Select
plNestCount = plNestCount - 1
End If
ExecCommand = SB.toString
Set SB = Nothing
End Function
Dim strFunc1 As String, strFunc2 As String, strFunc3 As String
Dim objSC As Object
Dim objJS1 As Object, objJS2, objJS3
Set objSC = CreateObject("ScriptControl")
objSC.Language = "JScript"
strFunc1 = "function getjson1(s) { return eval('(' + s + ')'); }"
strFunc2 = "function getjson2(s) { return eval('(' + s + ').d[0].c[0].e[0].o.ah'); }"
strFunc3 = "function getjson3(s) { return eval('(' + s + ').d[0].c[0].e[0].o'); }"
's = "function j(s) { return eval('(' + s + ').people[1]'); }"
objSC.AddCode strFunc1
objSC.AddCode strFunc2
objSC.AddCode strFunc3
Set objJS1 = objSC.CodeObject.getjson1(strText)
Set objJS2 = objSC.CodeObject.getjson2(strText)
Set objJS3 = objSC.CodeObject.getjson3(strText)
Dim s1, s2
s1 = CallByName(objJS2, "1", VbGet)
s2 = CallByName(objJS3, "1x2", VbGet)