FCM HTTP v1 Batch request won't work in PHP - php

Question

I'm using currently the Firebase messaging with PHP. I was able to make it work with a single notification with PHP and cURL. I've read the documentation about making batch request and I've constructed the request string as follow:
--subrequest_boundary
Content-Type: application/http
Content-Transfer-Encoding: binary
Authorization: Bearer ya29.xxxxxnY
POST /v1/projects/xxxxxxxx/messages:send
Content-Type: application/json
accept: application/json
{
"message":{
"token":"cxxxxx3",
"data":{
"typeNoti":"paiement",
"idcompte":"admin",
"typecompte":"paiement"
},
"notification":{
"title":"Test1",
"body":"Notification de test 1"
}
}
}
--subrequest_boundary
Content-Type: application/http
Content-Transfer-Encoding: binary
Authorization: Bearer yaxxxxxxY
POST /v1/projects/xxxxxx/messages:send
Content-Type: application/json
accept: application/json
{
"message":{
"token":"eoxxxxxU1",
"data":{
"typeNoti":"paiement",
"idcompte":"compte2",
"typecompte":"paiement"
},
"notification":{
"title":"Test1",
"body":"Notification de test 1"
}
}
}
--subrequest_boundary--
This string is generated in a file called batch_request.txt as the documentation said. When trying to send the request with cURL I receive this error:
{
"error": {
"code": 400,
"message": "Failed to parse batch request, error: 0 items. Received batch body: (0) bytes redacted",
"status": "INVALID_ARGUMENT"
}
}
I've experienced a strange behavior also, which is when I construct that string manually (in PHP I use HEREDOC), the batch request does occurs with 200ok response. I've tried to find some hidden character but couldn't.
I know there is a library called firebase-php. The problem with it is that I cannot find a straight foreward example like this:
//authenticate with json file
//create new token if it doesn't exist or skip
//create notification array
//create data array
//send multi notifications to multiple devices
I actually use a for loop and mono notification (one device token, one message at a time). The problem with this is that not all notifications are sent.
I appreciate your help thanks!

Answer 1

I gathered the code from firebase-php docs. After installing the library with composer I get a lot of errors and a lot of missing files in Firebase directory inside vendor like Factory.php etc
My solution was to NOT USE firebase-php library due to the numerous bugs I've faced (or maybe misuses) neither to construct the REST request text file for batch request. I used instead the NodeJS SDK which worked like a charm. I'm running a javascript file from my php code using exec.