Creating Messaging Topic On Cloud Function - node.js

Question

I'm trying to create Topic For each newly created groups. So I wrote this function for doing that operation.
exports.createGroupTopic = functions.database.ref("groups/{groupid}/id")
.onWrite(event=>{
var groupid = event.params.groupid;
request({
url: "https://iid.googleapis.com/iid/v1/my_registration_token/rel/topics/topic_name",
headers: {
'Content-Type':'application/json',
'Content-Length': 0,
'Authorization':'my API Key'
}
}, function (error, response, body){
console.log(response);
});
});
But when I run this code I get the following response log on Firebase console..
IncomingMessage {
_readableState:
ReadableState {
objectMode: false,
highWaterMark: 16384,
buffer: BufferList { head: null, tail: null, length: 0 },
length: 0,
pipes: null,
pipesCount: 0,
flowing: true,
ended: true,
endEmitted: true,
reading: false,
sync: false,
needReadable: false,
emittedReadable: false,
readableListening: false,
resumeScheduled: false,
defaultEncoding: 'utf8',
ranOut: false,
awaitDrain: 0,
readingMore: false,
decoder: null,
encoding: null },
readable: false,
domain: null,
_events:
{ end: [ [Function: responseOnEnd], [Function] ],
close: [ [Function], [Function] ],
data: [Function],
error: [Function] },
_eventsCount: 4,
_maxListeners: undefined,
socket:
TLSSocket {
_tlsOptions:
{ pipe: null,
secureContext: [Object],
isServer: false,
requestCert: true,
rejectUnauthorized: true,
session: undefined,
NPNProtocols: undefined,
ALPNProtocols: undefined,
requestOCSP: undefined },
_secureEstablished: true,
_securePending: false,
_newSessionPending: false,
_controlReleased: true,
_SNICallback: null,
servername: null,
npnProtocol: false,
alpnProtocol: false,
authorized: true,
authorizationError: null,
encrypted: true,
_events:
{ close: [Object],
end: [Object],
finish: [Function: onSocketFinish],
_socketEnd: [Function: onSocketEnd],
secure: [Function],
free: [Function: onFree],
agentRemove: [Function: onRemove],
drain: [Function: ondrain],
error: [Function: socketErrorListener],
data: [Function: socketOnData] },
_eventsCount: 10,
connecting: false,
_hadError: false,
_handle: null,
_parent: null,
_host: 'iid.googleapis.com',
_readableState:
ReadableState {
objectMode: false,
highWaterMark: 16384,
buffer: [Object],
length: 0,
pipes: null,
pipesCount: 0,
flowing: true,
ended: true,
endEmitted: true,
reading: false,
sync: false,
needReadable: false,
emittedReadable: false,
readableListening: false,
resumeScheduled: false,
defaultEncoding: 'utf8',
ranOut: false,
awaitDrain: 0,
readingMore: false,
decoder: null,
encoding: null },
readable: false,
domain: null,
_maxListeners: undefined,
_writableState:
WritableState {
objectMode: false,
highWaterMark: 16384,
needDrain: false,
ending: true,
ended: true,
finished: true,
decodeStrings: false,
defaultEncoding: 'utf8',
length: 0,
writing: false,
corked: 0,
sync: false,
bufferProcessing: false,
onwrite: [Function],
writecb: null,
writelen: 0,
bufferedRequest: null,
lastBufferedRequest: null,
pendingcb: 0,
prefinished: true,
errorEmitted: false,
bufferedRequestCount: 0,
corkedRequestsFree: [Object] },
writable: false,
allowHalfOpen: false,
destroyed: true,
_bytesDispatched: 468,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: undefined,
_server: null,
ssl: null,
_requestCert: true,
_rejectUnauthorized: true,
parser: null,
_httpMessage:
ClientRequest {
domain: null,
_events: [Object],
_eventsCount: 5,
_maxListeners: undefined,
output: [],
outputEncodings: [],
outputCallbacks: [],
outputSize: 0,
writable: true,
_last: true,
upgrading: false,
chunkedEncoding: false,
shouldKeepAlive: false,
useChunkedEncodingByDefault: false,
sendDate: false,
_removedHeader: [Object],
_contentLength: 0,
_hasBody: true,
_trailer: '',
finished: true,
_headerSent: true,
socket: [Circular],
connection: [Circular],
_header: 'GET /iid/v1/my_token_id/rel/topics/TOPIC_NAME HTTP/1.1\r\nContent-Type: application/json\r\nContent-Length: 0\r\nAuthorization: api_key\r\nhost: iid.googleapis.com\r\nConnection: close\r\n\r\n',
_headers: [Object],
_headerNames: [Object],
_onPendingData: null,
agent: [Object],
socketPath: undefined,
timeout: undefined,
method: 'GET',
path: '/iid/v1/fphzdEcS_D0:APA91b
Then I ran it again locally And it gave me Invalid Token Error. Then I tested the token to send direct notification. And it's working perfectly.
I don't know where is the problem. SO need help :(

Answer 1

This variation of your code works for me. I added the POST method and prefix key= to the Authorization value. Try it and see if it works for you.
exports.createGroupTopic = functions.database.ref("groups/{groupid}/id")
.onWrite(event => {
var groupid = event.params.groupid;
request({
method: 'POST', // <= ADDED
// ------------------- device token ------------
url: "https://iid.googleapis.com/iid/v1/cAzme9iGTO4:APA91bE...lRbx1yTei2PNFgTYGUQDUTj/rel/topics/someTopic",
headers: {
'Content-Type':'application/json',
'Content-Length': 0,
// Note below. Added: 'key='
// ----------------- server key --------------------------
'Authorization':'key=AAAAXp8june:APA91bF-Nq9pmQKr...HOES6ugO3_Xf-jV472nfn-sb'
}
}, function (error, response, body){
console.log('error:', error);
console.log('statusCode:', response && response.statusCode);
});
});
I used this function to confirm that the topic subscription was added. The returned body contains status for the device, including the topics subscribed to:
exports.checkGroupTopic = functions.database.ref("groups/check")
.onWrite(event => {
const token = 'cAzme9iGTO4:APA91bE...lRbx1yTei2PNFgTYGUQDUTj';
const serverKey = 'AAAAXp8june:APA91bF-Nq9pmQKr...HOES6ugO3_Xf-jV472nfn-sb';
request({
method: 'GET',
url: `https://iid.googleapis.com/iid/info/${token}?details=true`,
headers: {
'Content-Type':'application/json',
'Content-Length': 0,
'Authorization':`key=${serverKey}`
}
}, function (error, response, body){
console.log('error:', error);
console.log('statusCode:', response && response.statusCode);
console.log('body:', body);
});
});