[VERSION_MISMATCH]: No If-Match header found on UpdateRemoteConfig call

[stillie]

When calling remoteConfigApi.projects.updateRemoteConfig(updatedRemoteConfigValue, projectName); i am receiving the above error.

In my investigation and trial and error i found that adding headers.putIfAbsent("If-Match", () => "etag-{ProjectNumber}-{CurrentVersion}"); to the below file at the below line fixed the issue

googleapis.dart/discoveryapis_commons/lib/src/api_requester.dart

Line 217 in fce266f

Currently there is no way to add the etag to the call when updating a remote config value

{ProjectNumber} = The firebase project number
{CurrentVersion} = The current version of the change

[stillie]

There was a similar issue found here for PHP googleapis/google-api-php-client-services#309

[stillie]

Is anyone able to look at this? :(

[kevmoo]

An idea: wrap the Client you pass to the API using a custom https://pub.dev/documentation/http/latest/http/BaseClient-class.html

Override side to create a new request with the header you want.

We could add some extra helpers here to make things easier...would need to investigate.

[kevmoo]

So weird. This is the ONLY API I can see that has this restriction. Hrm...

[stillie]

The problem with that @kevmoo is that i need to attach a version to the header without knowing what the current version is when i create the client initiallly?

[stillie]

Here is an example of what i attempted with your suggestion around the BaseClient:

Disclaimer: Don't judge me by the code, this is just setting up a POC.

https://gist.github.com/stillie/562cb86b16345a382bf0edc1788f7521