Payload Mapping Function Fails due to Syntax Error

[mfbatra]

I perform the following:
curl -X POST -u devops:foobar -H 'Content-Type: application/json' -d ' { "targetActorSelection": "/system/sharding/connection", "headers": { "aggregate": false }, "piggybackCommand": { "type": "connectivity.commands:modifyConnection", "connection": { "id": "mqtt-example-connection-123", "connectionType": "mqtt", "connectionStatus": "open", "failoverEnabled": true, "uri": "tcp://test.mosquitto.org:1883", "sources": [{ "addresses": ["ditto-tutorial/#"], "authorizationContext": ["nginx:ditto"], "qos": 0, "filters": [] }], "targets": [{ "address": "ditto-tutorial/{{ thing:id }}", "topics": [ "_/_/things/twin/events", "_/_/things/live/messages" ], "authorizationContext": ["nginx:ditto"], "qos": 0 }], "mappingContext": { "mappingEngine": "JavaScript", "options": { "incomingScript": "function mapToDittoProtocolMsg(headers, textPayload, bytePayload, contentType) {const jsonString = String.fromCharCode.apply(null, new Uint8Array(bytePayload));const jsonData = JSON.parse(jsonString); const thingId = jsonData.thingId.split(':'); const value = { temp_sensor: { properties: { value: jsonData.temp } },altitude: { properties: { value: jsonData.alt } } }; return Ditto.buildDittoProtocolMsg(thingId[0], thingId[1], 'things', 'twin', 'commands', 'modify', '/features', headers, value);}" } } } } } ' http://localhost:8080/devops/piggyback/connectivity?timeout=60000ms

and get the following response:
{"?":{"?":{"type":"devops.responses:errorResponse","status":400,"serviceName":null,"instance":null,"payload":{"status":400,"error":"connectivity:connection.configuration.invalid","message":"The message mapper configuration failed due to: syntax error (incomingScript#1) - in line/column #1/242, source:\nfunction mapToDittoProtocolMsg(headers, textPayload, bytePayload, contentType) {const jsonString = String.fromCharCode.apply(null, new Uint8Array(bytePayload));const jsonData = JSON.parse(jsonString); const thingId = jsonData.thingId.split(:); const value = { temp_sensor: { properties: { value: jsonData.temp } },altitude: { properties: { value: jsonData.alt } } }; return Ditto.buildDittoProtocolMsg(thingId[0], thingId[1], things, twin, commands, modify, /features, headers, value);}","description":"Check the configuration options of your mapper for errors."}}}}

Can anyone please help?

[thjaeckle]

You have a Syntax error in
(incomingScript#1) - in line/column #1/242

You mixed double quotes in your script an single quotes which won't work when you make the request with cUrl using single quotes as delimiter.
Change 'twin' etc to using double quotes and you should be good.