<% option explicit
' Copyright 2008 Scott J. Waldron
' www.thewayofcoding.com
'
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'
'--------------- EXAMPLE ON HOW TO USE THIS CLASS ---------------
' dim passedFormDatabaseName, passedFormPassword, passedXmlFormData, constructedXmlDocument
'
' 'start constructing the return document
' constructedXmlDocument = "<?xml version=""1.0"" encoding=""utf-8""?>" & vbCrLf & "<returndata>" & vbCrLf
'
' passedFormDatabaseName = request.form("databasefilename")
' passedFormPassword = request.form("databasepassword")
' passedPostBackData = request.form("postbackdata")
'
' 'create an instance of the access database connector class
' set adbInstance = new AccessDatabase
'
' 'define the database filename, note that it should be in the same directory as this script
' adbInstance.setDatabaseFilename = passedFormDatabaseName
'
' 'include a password if available
' if passedFormPassword <> "" then
' adbInstance.setDatabasePassword = passedFormPassword
' end if
'
' 'initialize the instance
' call adbInstance.initialize()
'
' 'write whatever xml was generated by the class instance
' constructedXmlDocument = constructedXmlDocument & adbInstance.xmlToDatabase(passedXmlFormData)
'
' set adbInstance = nothing
'
' 'finish off the return document
' constructedXmlDocument = constructedXmlDocument & vbCrLf & "</returndata>"
'
' 'tell the caller what type of data is being returned
' response.contentType = "text/xml"
' 'send the xml document to the user
' response.write(constructedXmlDocument)
'
'-----------------------------------------------------------------
'
' You would then post data to this code in the two (or 3 with password) elements.
' Here is an example of a insert statement:
' <?xml version="1.0" encoding="utf-8"?>
' <query>
' <insert table="comment">
' <entryid>1</entryid>
' <bodytext>
' <![CDATA[text here...]]>
' </bodytext>
' <username>person</username>
' <timestamp>3:45pm</timestamp>
' </insert>
' </query>
'
' We are inserting a comment into a comment table, entry id would be the foreign key.
' Each tag inside the insert tag, corresponds to a field in the database.
' All of this XML-AS-SQL, gets converted to MS-Access SQL code and then written to whatever database file is specified.
'
' All XML sent to the class should be encased in the <query> tags
' Inside that, there can be as many sql commands as you want (currently INSERT, UPDATE, DELETE, SELECT statements).
'
'
'
'''
''' AccessDatabase Class with Post Data Processor
''' A generic class that will allow access to an MS Access database in the same directory as the script file.
'''
class AccessDatabase
dim dbConnection 'the database connection object used throughout the script
dim errorHandlerState 'defines whether the error handler is on or not
dim fullSitePath
dim databaseFilename
dim databasePassword
dim errorList 'will store a list of errors that happen in execution
'''
''' Property to set the database filename (necessary before calling initialize())
public property let setDatabaseFilename(filename)
databaseFilename = filename
end property
'''
''' property to set the database password (not necessary unless the db has a password)
public property let setDatabasePassword(password)
databasePassword = password
end property
'''
''' property to get a list of errors that happened
public property get getErrors()
getErrors = errorList
end property
'''
''' Class destructor that closes and destroys the database object when the class is no longer in use.
private sub Class_Terminate()
'make sure the database object is closed
call closeDatabaseConnection()
end sub
'''
''' Creates the database connection based on data that the user passed to the object.
public function initialize()
dim functionSuccess
functionSuccess = true
errorList = "" 'get the error variable ready in case it is needed
'determine whether the errors should be captured or not.
errorHandlerState = false
'get the full directory path to this script file
fullSitePath = getFullPath()
'before trying to load the database
if databaseFilename <> "" then
call initializeDatabaseConnection()
end if
initialize = functionSuccess
end function
'''
''' This function processes whatever errors happened
private function processError()
'save the current error before calling any other functions
dim errorNumber, errorDescription, errorSource, errorTimestamp
errorNumber = err.number
errorDescription = err.description
errorSource = err.source
errorTimestamp = date() & " " & time()
errorList = errorList & vbCrLf & "<error>" & cleanInput(errorDescription) & "</error>" & vbCrLf
err.clear
end function
'''
''' Connect to the database so we can perform queries.
private function initializeDatabaseConnection()
if errorHandlerState = true then on error resume next end if
'open the database
dim fullDbFilePath, databaseConnectionString
'create the full path to the database file including the actual filename
fullDbFilePath = fullSitePath & databaseFilename
'append the database
databaseConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & fullDbFilePath & ";"
'add a password to the connection string if it is available
if databasePassword <> "" then
databaseConnectionString = databaseConnectionString & "Jet OLEDB:Database Password=" & databasePassword & ";"
end if
'create the database object
set dbConnection = Server.CreateObject("ADODB.Connection")
''open a connection to the database
call dbConnection.open(databaseConnectionString)
if errorHandlerState = true and err.number <> 0 then processError() end if
end function
'''
''' Close the global database connection
private function closeDatabaseConnection()
if errorHandlerState = true then on error resume next end if
'close the database
call dbConnection.close()
set dbConnection = nothing
if errorHandlerState = true and err.number <> 0 then processError() end if
end function
'''
'''This function returns the full path to this script file eg: c:\\folder\folder\folder\
private function getFullPath()
if errorHandlerState = true then on error resume next end if
dim absRoot, lsPath, arPath
absRoot = request.ServerVariables("APPL_PHYSICAL_PATH")
lsPath = Request.ServerVariables("SCRIPT_NAME")
arPath = split(lsPath, "/")
arPath(uBound(arPath, 1)) = ""
absRoot = left(absRoot, LEN(absRoot) - 1) & join(arPath, "\")
getFullPath = absRoot
if errorHandlerState = true and err.number <> 0 then processError() end if
end function
'''
''' Take xml data (most likely from a form submission and insert it into a database
''' the xml data should be like this:
''' <query>
''' <insert table="tablename">
''' <fieldname>value</fieldname>
''' </insert>
''' <update table="tablename" where="statement">
''' <fieldname>value</fieldname>
''' </update>
''' <delete table="tablename" where="statement" />
''' </query>
public function xmlToDatabase(xmlData)
if errorHandlerState = true then on error resume next end if
dim objXmlData, queryXmlReturnData, resultingSql(), resultCounter, resultXmlText
'initialize the xml object
set objXmlData = Server.CreateObject("Msxml2.DOMDocument.6.0")
'make the object a standard synchronous type
objXmlData.aSync = false
'process the textual xml data into the object
call objXmlData.loadXml(xmlData)
'recursively go through the xml file and perform the functions on the database
call xmlToQueryStringArray(objXmlData.documentElement, resultingSql, 0)
'loop through the resulting sql statements and execute them on the database
if isArray(resultingSql) then
queryXmlReturnData = processQueryStringArray(resultingSql)
resultXmlText = queryXmlReturnData
else
resultXmlText = ""
end if
'destroy the object as it is done being used
set objXmlData = nothing
'return to the caller whatever xml result data was generated
xmlToDatabase = resultXmlText
if errorHandlerState = true and err.number <> 0 then processError() end if
end function
'''
''' This takes an array of sql statements and executes them on the database.
''' it will return data as an xml document
''' <result success="true" />
''' <result success="true">
''' <row>
''' <field>value</field>
''' <field2>value</field2>
''' </row>
''' <row>
''' <field>value</field>
''' <field2>value</field2>
''' </row>
private function processQueryStringArray(byRef queryStringArray())
if errorHandlerState = true then on error resume next end if
dim resultingXml, resultCounter, dbCommand
resultingXml = ""
'create a command object so sql can be executed
set dbCommand = server.createObject("ADODB.Command")
'give the command object a reference to the connection object
dbCommand.activeConnection = dbConnection
'loop through the sql commands and execute them on the database
'create xml code that will be of use to the caller
for resultCounter = 0 to uBound(queryStringArray) - 1
dim rowsAffectedCount, dbRecordPointer
'set the command to be executed
dbCommand.commandText = queryStringArray(resultCounter)
'execute the command on the database
set dbRecordPointer = dbCommand.execute(rowsAffectedCount) 'adCmdText = 1
'if there were rows affected in this query, make note of that fact
if rowsAffectedCount > 0 then
'there must have been rows modified, so note that
resultingXml = resultingXml & "<result success=""true"" />" & vbCrLf
else 'no rows were affected, so this could be a select statement
'see if there is actual data being returned (aka from a select statement) before trying to process anything
if not dbRecordPointer is nothing then
if dbRecordPointer.state = 1 then '1 = adStateOpen
if dbRecordPointer.BOF = false then
'go through the returned records and generate an xml document out of them
resultingXml = resultingXml & "<result success=""true"">" & vbCrLf
while dbRecordPointer.EOF = false
dim fieldCounter
'start the row tag
resultingXml = resultingXml & "<row>" & vbCrLf
'loop through each field in the record
'generate xml code that will hold the record data
for fieldCounter = 0 to dbRecordPointer.fields.count - 1
resultingXml = resultingXml & "<" & dbRecordPointer.fields(fieldCounter).name & "><![CDATA[" & vbCrLf & _
dbRecordPointer.fields(fieldCounter).value & vbCrLf & "]]></" & dbRecordPointer.fields(fieldCounter).name & ">" & vbCrLf
next
'end the row tag
resultingXml = resultingXml & "</row>" & vbCrLf
'move to the next record
dbRecordPointer.MoveNext()
wEnd
'end the result and query tags
resultingXml = resultingXml & "</result>" & vbCrLf & vbCrLf
'destroy the record set object
set dbRecordPointer = nothing
else 'for some reason the results don't exist, return with a false result
resultingXml = resultingXml & "<result success=""false"" />" & vbCrLf
end if
else 'no results were returned, so return with a false result
resultingXml = resultingXml & "<result success=""false"" />" & vbCrLf
end if
else 'the object was null, so return with a false result
resultingXml = resultingXml & "<result success=""false"" />" & vbCrLf
end if
end if
next
'make sure to close the recordset object
if not dbRecordPointer is nothing then
if dbRecordPointer.state <> 0 then '0 = adStateClosed
dbRecordPointer.close()
end if
end if
'destroy the command object as it is not needed anymore
set dbCommand = nothing
'return the resulting xml, that defines what happened with the sql
processQueryStringArray = resultingXml
if errorHandlerState = true and err.number <> 0 then processError() end if
end function
'''
''' Takes an xml document object and converts it into a string of SQL statements
''' This xml code:
''' <query>
''' <insert table="tablename">
''' <fieldname type="text">value</fieldname>
''' </insert>
''' </query>
''' Would be converted to:
''' INSERT INTO [tablename] (fieldname) VALUES ('value');
''' if you don't specify a type, it will be added as a string, if the field is numeric, an error will be thrown
private sub xmlToQueryStringArray(xmlNode, byRef resultingSql(), totalResultCount)
if errorHandlerState = true then on error resume next end if
dim partialSqlCode
partialSqlCode = ""
'make sure there is an xml node to process (not empty, null, or error)
if not xmlNode is nothing then
'test the current node to see if it is a special keyword (insert, update, delete)
select case xmlNode.nodeName 'figure out what to do with this current xml tag
case "query": 'loop through all of the queries that were asked to be executed
'this should be the first element of the xml file, we should process each child item as an sql statement
dim queryChildCounter
'loop through all of the children nodes of this query block
for queryChildCounter = 0 to xmlNode.childNodes.length - 1
dim queryXmlChildNode
set queryXmlChildNode = xmlNode.childNodes(queryChildCounter)
'expand the array so we can insert another statement into it
reDim preserve resultingSql(totalResultCount + 1)
'process each statement in this query
call xmlToQueryStringArray(xmlNode.childNodes(queryChildCounter), resultingSql, totalResultCount)
'get ready for any additional query strings that need to be made
totalResultCount = totalResultCount + 1
next
case "insert":
'get the table name for this insert
dim insertTableAttribute
insertTableAttribute = xmlNode.getAttribute("table")
'make sure a table attribute was specified
if insertTableAttribute <> "" then
partialSqlCode = partialSqlCode & "INSERT INTO [" & insertTableAttribute & "] ("
dim insertChildCount
dim insertChildrenCounter
dim insertSqlFieldList, insertSqlValueList
insertSqlFieldList = ""
insertSqlValueList = ""
insertChildCount = xmlNode.childNodes.length - 1
'loop through all of the children nodes
for insertChildrenCounter = 0 to insertChildCount
dim xmlChildNode
set xmlChildNode = xmlNode.childNodes(insertChildrenCounter)
dim insertChildTypeAttribute
'get they data type for this field so we can know how to write the sql statement
insertChildTypeAttribute = lCase(xmlChildNode.getAttribute("type"))
'set a default if the type could not be returned
'this still may cause issues if the type was an integer, but the caller didn't specify...
if isNull(insertChildTypeAttribute) then
insertChildTypeAttribute = "text"
end if
dim tempFieldName, tempFieldValue
tempFieldName = xmlChildNode.nodeName
tempFieldValue = xmlChildNode.text
'piece together the statement
if insertChildrenCounter <> insertChildCount then
if insertChildTypeAttribute <> "number" then
insertSqlFieldList = insertSqlFieldList & "[" & cleanInput(tempFieldName) & "], "
insertSqlValueList = insertSqlValueList & "'" & cleanInput(tempFieldValue) & "', "
else
insertSqlFieldList = insertSqlFieldList & "[" & cleanInput(tempFieldName) & "], "
insertSqlValueList = insertSqlValueList & cleanInput(tempFieldValue) & ", "
end if
else
if insertChildTypeAttribute <> "number" then
insertSqlFieldList = insertSqlFieldList & "[" & cleanInput(tempFieldName) & "])"
insertSqlValueList = insertSqlValueList & "'" & cleanInput(tempFieldValue) & "')"
else
insertSqlFieldList = insertSqlFieldList & "[" & cleanInput(tempFieldName) & "])"
insertSqlValueList = insertSqlValueList & cleanInput(tempFieldValue) & ")"
end if
end if
next
'piece together the sql statement
partialSqlCode = partialSqlCode & insertSqlFieldList & " VALUES (" & insertSqlValueList
end if
'assign all data that was constructed in this pass to the proper array index
resultingSql(totalResultCount) = partialSqlCode
case "update":
'get the table name for this update as well as the where statement
dim updateTableAttribute, updateWhereAttribute
updateTableAttribute = xmlNode.getAttribute("table")
updateWhereAttribute = xmlNode.getAttribute("where")
'make sure a table and where statement were specified
if updateTableAttribute <> "" and updateWhereAttribute <> "" then
partialSqlCode = partialSqlCode & "UPDATE [" & updateTableAttribute & "] SET "
dim updateChildCount, updateChildrenCounter
'save the programming type count (eg. count that starts at 0)
updateChildCount = xmlNode.childNodes.length - 1
'loop through all of the children nodes
for updateChildrenCounter = 0 to updateChildCount
dim updateXmlChildNode, updateChildTypeAttribute
set updateXmlChildNode = xmlNode.childNodes(updateChildrenCounter)
'get they data type for this field so we can know how to write the sql statement
updateChildTypeAttribute = lCase(updateXmlChildNode.getAttribute("type"))
'set a default if the type could not be returned
'this still may cause issues if the type was an integer, but the caller didn't specify...
if isNull(updateChildTypeAttribute) then
updateChildTypeAttribute = "text"
end if
'add to the string differently depending on if this is the last one or not
if updateChildrenCounter <> updateChildCount then
if updateChildTypeAttribute <> "number" then
partialSqlCode = partialSqlCode & "[" & cleanInput(updateXmlChildNode.nodeName) & "]='" & cleanInput(updateXmlChildNode.text) & "', "
else
partialSqlCode = partialSqlCode & "[" & cleanInput(updateXmlChildNode.nodeName) & "]=" & cleanInput(updateXmlChildNode.text) & ", "
end if
else
if updateChildTypeAttribute <> "number" then
partialSqlCode = partialSqlCode & "[" & cleanInput(updateXmlChildNode.nodeName) & "]='" & cleanInput(updateXmlChildNode.text) & "' "
else
partialSqlCode = partialSqlCode & "[" & cleanInput(updateXmlChildNode.nodeName) & "]=" & cleanInput(updateXmlChildNode.text) & " "
end if
end if
next
partialSqlCode = partialSqlCode & "WHERE " & updateWhereAttribute
end if
'assign all data that was constructed in this pass to the proper array index
resultingSql(totalResultCount) = partialSqlCode
case "delete":
'get the table name for this delete as well as the where statement
dim deleteTableAttribute, deleteWhereAttribute
deleteTableAttribute = xmlNode.getAttribute("table")
deleteWhereAttribute = xmlNode.getAttribute("where")
if deleteTableAttribute <> "" and deleteWhereAttribute <> "" then
partialSqlCode = partialSqlCode & "DELETE FROM [" & deleteTableAttribute & "] WHERE " & deleteWhereAttribute
end if
'assign all data that was constructed in this pass to the proper array index
resultingSql(totalResultCount) = partialSqlCode
case "select":
'get the table name, where statement, and optional top statement (aka. record return limit)
dim selectTableAttribute, selectWhereAttribute, selectTopAttribute, selectOrderByAttribute, selectCount, selectReturnList
selectTableAttribute = xmlNode.getAttribute("table")
selectWhereAttribute = xmlNode.getAttribute("where")
selectTopAttribute = xmlNode.getAttribute("top")
selectOrderByAttribute = xmlNode.getAttribute("order")
selectCount = xmlNode.getAttribute("count")
partialSqlCode = partialSqlCode & "SELECT "
if selectTableAttribute <> "" then
'see if the caller only wants a count if rows
if selectCount <> "" then
selectReturnList = "COUNT(" & selectCount & ") "
else 'not trying to get a count, so process the selection list
'if the caller wants only a certain number of results, set that in the sql statement
if selectTopAttribute <> "" then
partialSqlCode = partialSqlCode & "TOP " & selectTopAttribute & " "
end if
dim selectChildCount, selectChildrenCounter
selectChildCount = xmlNode.childNodes.length - 1
selectReturnList = ""
'loop through all of the children nodes
for selectChildrenCounter = 0 to selectChildCount
dim selectXmlChildNode
set selectXmlChildNode = xmlNode.childNodes(selectChildrenCounter)
if selectChildrenCounter <> selectChildCount then
selectReturnList = selectReturnList & "[" & cleanInput(selectXmlChildNode.nodeName) & "], "
else
selectReturnList = selectReturnList & "[" & cleanInput(selectXmlChildNode.nodeName) & "]"
end if
next
end if
'if the caller didn't specify fields to return, return all of them with *
if selectReturnList <> "" then
partialSqlCode = partialSqlCode & selectReturnList & " FROM [" & selectTableAttribute & "]"
else
partialSqlCode = partialSqlCode & "* FROM [" & selectTableAttribute & "]"
end if
'add a where statement if available
if selectWhereAttribute <> "" then
partialSqlCode = partialSqlCode & " WHERE " & selectWhereAttribute
end if
'add an order by statement if the caller specified one
if selectOrderByAttribute <> "" then
partialSqlCode = partialSqlCode & " ORDER BY " & selectOrderByAttribute
end if
end if
'assign all data that was constructed in this pass to the proper array index
resultingSql(totalResultCount) = partialSqlCode
end select
end if
if errorHandlerState = true and err.number <> 0 then processError() end if
end sub
'''
''' Takes an input and replaces all characters that could cause problems with their html escaped equivalents.
private function cleanInput(inputStringData)
if errorHandlerState = true then on error resume next end if
dim fixedString
fixedString = inputStringData 'save a copy so we can to multiple replacements on the string
if inputStringData <> "" then
dim replacementList(5, 2)
replacementList(0,0) = """" 'an " character
replacementList(0,1) = """ 'an " character
replacementList(1,0) = "'"
replacementList(1,1) = "'" 'an ' character
replacementList(2,0) = "<"
replacementList(2,1) = "<" 'an < character
replacementList(3,0) = ">"
replacementList(3,1) = ">" 'an > character
replacementList(4,0) = "\"
replacementList(4,1) = "\" 'an \ character
'replace any matching characters it finds with their html encoded values
dim i 'counter variable
for i = 0 to 4
'take each related pair and do the replacement
fixedString = replace(fixedString, replacementList(i, 0), replacementList(i, 1))
next
fixedString = trim(fixedString)
end if
cleanInput = fixedString
if errorHandlerState = true and err.number <> 0 then processError() end if
end function
end class
%>