var scriptProp = PropertiesService.getScriptProperties()

function intialSetup () {

var activeSpreadsheet = DocumentApp.getActiveDocument()

scriptProp.setProperty('key', activeSpreadsheet.getId())

}

function doPost (e) {

var lock = LockService.getScriptLock()

lock.tryLock(10000)

try {

var doc = DocumentApp.openById(scriptProp.getProperty('key'))

var body = doc.getBody()

var saved=body.getText()

if(e.parameter["data"]=="get data"){

return ContentService

.createTextOutput(JSON.stringify({ 'result': 'sugggccess', 'row':saved}))

.setMimeType(ContentService.MimeType.JSON)

}

body.setText(e.parameter["data"])

return ContentService

.createTextOutput(JSON.stringify({ 'result': 'sugggccess', 'row': e }))

.setMimeType(ContentService.MimeType.JSON)

}

catch (e) {

return ContentService

.createTextOutput(JSON.stringify({ 'result': 'error', 'error': e }))

.setMimeType(ContentService.MimeType.JSON)

}

finally {

lock.releaseLock()

}

}