Complete the steps described in the rest of this page to create a simple Java command-line application that makes requests to the Google Docs API.
Prerequisites
To run this quickstart, you need the following prerequisites:
- Java 1.8 or greater
- Gradle 2.3 or greater.
- A Google account
Step 1: Turn on the Google Docs API
Click this button to create a new Cloud Platform project and automatically enable the Google Docs API:
In resulting dialog click DOWNLOAD CLIENT CONFIGURATION and save the filecredentials.json
to your working directory.
Step 2: Prepare the project
In your working directory, run the following commands to create a new project structure:
gradle init --type basic
mkdir -p src/main/java src/main/resources
Copy the
credentials.json
file you downloaded in Step 1 into thesrc/main/resources/
directory you just created.Open the default
build.gradle
file and replace its contents with the following code:
Step 3: Set up the sample
Create a file in the src/main/java/
folder with the following filename and
code:
Step 4: Run the sample
Build and run the quickstart with the command:
gradle run
The first time you run the sample, it will prompt you to authorize access:
The sample will attempt to open a new window or tab in your default browser. If this fails, copy the URL from the console and manually open it in your browser.
If you are not already logged into your Google account, you will be prompted to log in. If you are logged into multiple Google accounts, you will be asked to select one account to use for the authorization.
- Click the Accept button.
- The sample will proceed automatically, and you may close the window/tab.
Notes
- Authorization information is stored on the file system, so subsequent executions will not prompt for authorization.
- The authorization flow in this example is designed for a command-line application. For information on how to perform authorization in a web application, see Using OAuth 2.0 for Web Server Applications.
Troubleshooting
This section describes some common issues that you may encounter while attempting to run this quickstart and suggests possible solutions.
This app isn't verified.
The OAuth consent screen that is presented to the user may show the warning "This app isn't verified" if it is requesting scopes that provide access to sensitive user data. These applications must eventually go through the verification process to remove that warning and other limitations. During the development phase you can continue past this warning by clicking Advanced > Go to {Project Name} (unsafe).