Cloud tasks headers are not exposed

[AmichayMiara]

[REQUIRED] Version info

node: v18.13.0

firebase-functions: 4.1.1

firebase-tools: 11.20.0

firebase-admin: 11.4.1

[REQUIRED] Test case

https://firebase.google.com/docs/functions/task-functions#task_queue_configuration

onDispatch function is getting the task data but not the task headers.

firebase-functions/src/common/providers/tasks.ts

Lines 112 to 114 in 0b066d6

	export function onDispatchHandler<Req = any>(
	handler: v1TaskHandler | v2TaskHandler<Req>
	): (req: https.Request, res: express.Response) => Promise<void> {

We noticed that the headers are exposed when triggered by HTTP target task handler (https://cloud.google.com/tasks/docs/creating-http-target-tasks#handler), and we expect to also get them via onDispatch handler context object.

It seems that the headers can be useful for various purposes.
As an example, We particularly interested in the X-CloudTasks-TaskExecutionCount header, as it would allow us to better understand how tasks are being executed.

[REQUIRED] Steps to reproduce

No steps to reproduce. Right now task headers are not accessible using onDispatch.

[REQUIRED] Expected behavior

Task headers to be exposed.

[REQUIRED] Actual behavior

Task headers are not exposed.

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[taeold]

Thanks for the feature request @AmichayMiara!

Internal note: similar to #1178

[sdegroot]

Hi all, is there any known planning on when this feature will be released?

[gustavopch]

This was actually released in https://github.com/firebase/firebase-functions/releases/tag/v4.5.0 (PR: #1423) and this issue can be closed.