Cloud Functions client libraries

This page shows how to get started with the Cloud Client Libraries for the Cloud Functions API. Read more about the client libraries for Cloud APIs, including the older Google API Client Libraries, in Client Libraries Explained.

Installing the client library

C#

For more information, see Setting Up a C# Development Environment.

Install-Package Google.Cloud.Functions.V1 -Pre

Java

For more information, see Setting Up a Java Development Environment.

If you are using Maven, add the following to your pom.xml file. For more information about BOMs, see The Google Cloud Platform Libraries BOM.

<dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-functions</artifactId>
  <version>2.4.3</version>
</dependency>

If you are using Gradle, add the following to your dependencies:

implementation 'com.google.cloud:google-cloud-functions:2.4.3'

If you are using sbt, add the following to your dependencies:

libraryDependencies += "com.google.cloud" % "google-cloud-functions" % "2.4.3"

Node.js

For more information, see Setting Up a Node.js Development Environment.

npm install --save @google-cloud/functions

Setting up authentication

To run the client library, you must first set up authentication. One way to do that is to create a service account and set an environment variable, as shown in the following steps. For other ways to authenticate, see Authenticating as a service account.

Console

Create a service account:

  1. In the console, go to the Create service account page.

    Go to Create service account
  2. Select your project.
  3. In the Service account name field, enter a name. The console fills in the Service account ID field based on this name.

    In the Service account description field, enter a description. For example, Service account for quickstart.

  4. Click Create and continue.
  5. Click Done to finish creating the service account.

    Do not close your browser window. You will use it in the next step.

Create a service account key:

  1. In the console, click the email address for the service account that you created.
  2. Click Keys.
  3. Click Add key, and then click Create new key.
  4. Click Create. A JSON key file is downloaded to your computer.
  5. Click Close.

gcloud

Set up authentication:

  1. Create the service account:

    gcloud iam service-accounts create NAME

    Replace NAME with a name for the service account.

  2. Generate the key file:

    gcloud iam service-accounts keys create FILE_NAME.json --iam-account=SERVICE_ACCOUNT_NAME@PROJECT_ID.iam.gserviceaccount.com

    Replace the following:

    • FILE_NAME: a name for the key file
    • SERVICE_ACCOUNT_NAME: the name of the service account
    • PROJECT_ID: the project ID where you created the service account

Provide authentication credentials to your application code by setting the environment variable GOOGLE_APPLICATION_CREDENTIALS. This variable applies only to your current shell session. If you want the variable to apply to future shell sessions, set the variable in your shell startup file, for example in the ~/.bashrc or ~/.profile file.

Linux or macOS

export GOOGLE_APPLICATION_CREDENTIALS="KEY_PATH"

Replace KEY_PATH with the path of the JSON file that contains your service account key.

For example:

export GOOGLE_APPLICATION_CREDENTIALS="/home/user/Downloads/service-account-file.json"

Windows

For PowerShell:

$env:GOOGLE_APPLICATION_CREDENTIALS="KEY_PATH"

Replace KEY_PATH with the path of the JSON file that contains your service account key.

For example:

$env:GOOGLE_APPLICATION_CREDENTIALS="C:\Users\username\Downloads\service-account-file.json"

For command prompt:

set GOOGLE_APPLICATION_CREDENTIALS=KEY_PATH

Replace KEY_PATH with the path of the JSON file that contains your service account key.

Additional resources