Python Library for helping to create Python services from Google APIs

Something I have to do a lot is create connections to Google Service endpoints. This generally requires a fair amount of boiler-plate code that io just copied and pasted from other locations. Also any time a new service is needed, I need to find that specific implementation of the service builder and add the new endpoint.

Obviously this can lead to potential errors and if a bug is found, I have to remember where I created these services and fix it in many projects.

This has led me to create a small helper library to make the process easier. Included in the library is a complete and updated (at time of publishing) list of all the Google APIs along with their versions and endpoints as Enums ready for use.

Usage

service_builder.build_service() needs two mandatory pieces of information:

key

These can be supplied in one of 4 ways.

1. A valid google.oauth2.Credentials object, created and passed to the service builder.
2. A str which is the name of a local file containing the json representation of an OAuth credentials object.
3. A Mapping object which is a json keyfile dict
4. An OAuthKey object from this package, which is a dataclass object comprising of the minimum fields necessary to perform the OAuth connection.

service

This is an Enum in the service_framework.service module, which defines the Google service you're planning to connect to. All the standard Google services are included (as of the date listed in the Services.py file).

If a new service has been added but this library has yet to be updated, you can request it by using either Service('<UNLISTED SERVICE>') or Service.from_value('<UNLISTED SERVICE>'). This will cause the library to attempt to fetch the service's definition from Google and will create an entry in the enum for this new service.

Examples

1. Using Credentials

from service_framework.services import Service
from service_framework import service_builder
from google.oauth2 import credentials as oauth

credentials = oauth.Credentials(
   access_token="<YOUR ACCESS TOKEN>",
   refresh_token="<YOUR REFRESH TOKEN>",
   token_uri="https://oauth2.googleapis.com/token",
   client_id="<YOUR CLIENT ID>",
   client_secret="<YOUR CLIENT SECRET>"
)

service = service_builder.build_service(service=Service.CHAT, key=credentials)

2. Using an OAuthKey

from service_framework.services import Service
from service_framework import service_builder

key = service_builder.OAuthKey(
   access_token="<YOUR ACCESS TOKEN>",
   refresh_token="<YOUR REFRESH TOKEN>",
   token_uri="https://oauth2.googleapis.com/token",
   client_id="<YOUR CLIENT ID>",
   client_secret="<YOUR CLIENT SECRET>"
)

service = service_builder.build_service(service=Service.GMAIL, key=key)

Here, we are creating the key as an OAuthKey object as we have clearly got the tokens and client_[id|secret] from elsewhere. Creating the service is then as simple as invoking the service_builder.build_service method which will return you a service you can use.