Learn Google-cloud-functions - 10 Code Examples & CST Typing Practice Test

Google Cloud Functions is a fully managed serverless compute service that allows developers to run event-driven code without provisioning or managing servers. It automatically scales and integrates with the Google Cloud ecosystem.

View all 10 Google-cloud-functions code examples →

Simple Google Cloud Function (Node.js)Google Cloud Function with Query Parameters Google Cloud Function with JSON Response Google Cloud Function POST Handler Google Cloud Function with Environment Variables Google Cloud Function Redirect Google Cloud Function Error Handling Google Cloud Function Delayed Response Google Cloud Function Fetch External API Google Cloud Function with Custom Headers

Learn GOOGLE-CLOUD-FUNCTIONS with Real Code Examples

Updated Nov 25, 2025

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Code Sample Descriptions

Simple Google Cloud Function (Node.js)

# gcf/demo/index.js
exports.helloWorld = (req, res) => {
    res.status(200).send('Hello, Google Cloud!');
};

A simple Google Cloud Function responding with 'Hello, Google Cloud!' to HTTP requests.

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Google Cloud Function with Query Parameters

# gcf/demo/query.js
exports.queryFunction = (req, res) => {
    const name = req.query.name || 'Guest';
    res.status(200).send(`Hello, ${name}!`);
};

Reads query parameters and responds with a personalized message.

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Google Cloud Function with JSON Response

# gcf/demo/json.js
exports.jsonFunction = (req, res) => {
    res.status(200).json({ message: 'Hello, JSON!' });
};

Returns a JSON object in the response body.

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Google Cloud Function POST Handler

# gcf/demo/post.js
exports.postFunction = (req, res) => {
    const data = req.body;
    res.status(200).send(`Received: ${data.input}`);
};

Handles POST requests and parses JSON body.

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Google Cloud Function with Environment Variables

# gcf/demo/env.js
exports.envFunction = (req, res) => {
    const secret = process.env.MY_SECRET || 'No Secret';
    res.status(200).send(`Secret is: ${secret}`);
};

Uses environment variables in the function.

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Google Cloud Function Redirect

# gcf/demo/redirect.js
exports.redirectFunction = (req, res) => {
    res.redirect(302, 'https://cloud.google.com/');
};

Responds with a redirect to another URL.

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Google Cloud Function Error Handling

# gcf/demo/error.js
exports.errorFunction = (req, res) => {
    try {
        throw new Error('Something went wrong');
    } catch(err) {
        res.status(500).send(err.message);
    }
};

Demonstrates returning an error response.

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Google Cloud Function Delayed Response

# gcf/demo/delay.js
exports.delayFunction = async (req, res) => {
    await new Promise(resolve => setTimeout(resolve, 1000));
    res.status(200).send('Delayed Hello!');
};

Returns a response after a simulated delay.

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Google Cloud Function Fetch External API

# gcf/demo/fetch.js
const fetch = require('node-fetch');
exports.fetchFunction = async (req, res) => {
    const response = await fetch('https://api.github.com');
    const data = await response.json();
    res.status(200).json(data);
};

Fetches data from an external API and returns it.

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Google Cloud Function with Custom Headers

# gcf/demo/headers.js
exports.headersFunction = (req, res) => {
    res.set('X-Custom-Header', 'GCF');
    res.status(200).send('Hello with headers');
};

Returns custom HTTP headers in the response.

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Frequently Asked Questions about Google-cloud-functions

What is Google-cloud-functions?

What are the primary use cases for Google-cloud-functions?

Event-driven microservices. Real-time data processing. HTTP APIs and webhooks. Automating workflows using cloud events. Integrating with Firebase, Cloud Storage, or Pub/Sub

What are the strengths of Google-cloud-functions?

No server management required. Scales automatically with workload. Deep integration with Google Cloud services. Supports multiple programming languages. Quick deployment and iteration for developers

What are the limitations of Google-cloud-functions?

Limited execution time per function (default 9 minutes). Cold-start latency for infrequently invoked functions. Stateless execution by default. Requires understanding of event triggers and GCP services. Vendor lock-in due to tight Google Cloud integration

How can I practice Google-cloud-functions typing speed?

CodeSpeedTest offers 10+ real Google-cloud-functions code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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Code Sample Descriptions

Simple Google Cloud Function (Node.js)

# gcf/demo/index.js
exports.helloWorld = (req, res) => {
    res.status(200).send('Hello, Google Cloud!');
};

A simple Google Cloud Function responding with 'Hello, Google Cloud!' to HTTP requests.

Let’s Try →

Google Cloud Function with Query Parameters

# gcf/demo/query.js
exports.queryFunction = (req, res) => {
    const name = req.query.name || 'Guest';
    res.status(200).send(`Hello, ${name}!`);
};

Reads query parameters and responds with a personalized message.

Let’s Try →

Google Cloud Function with JSON Response

# gcf/demo/json.js
exports.jsonFunction = (req, res) => {
    res.status(200).json({ message: 'Hello, JSON!' });
};

Returns a JSON object in the response body.

Let’s Try →

Google Cloud Function POST Handler

# gcf/demo/post.js
exports.postFunction = (req, res) => {
    const data = req.body;
    res.status(200).send(`Received: ${data.input}`);
};

Handles POST requests and parses JSON body.

Let’s Try →

Google Cloud Function with Environment Variables

# gcf/demo/env.js
exports.envFunction = (req, res) => {
    const secret = process.env.MY_SECRET || 'No Secret';
    res.status(200).send(`Secret is: ${secret}`);
};

Uses environment variables in the function.

Let’s Try →

Google Cloud Function Redirect

# gcf/demo/redirect.js
exports.redirectFunction = (req, res) => {
    res.redirect(302, 'https://cloud.google.com/');
};

Responds with a redirect to another URL.

Let’s Try →

Google Cloud Function Error Handling

# gcf/demo/error.js
exports.errorFunction = (req, res) => {
    try {
        throw new Error('Something went wrong');
    } catch(err) {
        res.status(500).send(err.message);
    }
};

Demonstrates returning an error response.

Let’s Try →

Google Cloud Function Delayed Response

# gcf/demo/delay.js
exports.delayFunction = async (req, res) => {
    await new Promise(resolve => setTimeout(resolve, 1000));
    res.status(200).send('Delayed Hello!');
};

Returns a response after a simulated delay.

Let’s Try →

Google Cloud Function Fetch External API

# gcf/demo/fetch.js
const fetch = require('node-fetch');
exports.fetchFunction = async (req, res) => {
    const response = await fetch('https://api.github.com');
    const data = await response.json();
    res.status(200).json(data);
};

Fetches data from an external API and returns it.

Let’s Try →

Google Cloud Function with Custom Headers

# gcf/demo/headers.js
exports.headersFunction = (req, res) => {
    res.set('X-Custom-Header', 'GCF');
    res.status(200).send('Hello with headers');
};

Returns custom HTTP headers in the response.

Let’s Try →

Frequently Asked Questions about Google-cloud-functions

What is Google-cloud-functions?

What are the primary use cases for Google-cloud-functions?

Event-driven microservices. Real-time data processing. HTTP APIs and webhooks. Automating workflows using cloud events. Integrating with Firebase, Cloud Storage, or Pub/Sub

What are the strengths of Google-cloud-functions?

No server management required. Scales automatically with workload. Deep integration with Google Cloud services. Supports multiple programming languages. Quick deployment and iteration for developers

What are the limitations of Google-cloud-functions?

How can I practice Google-cloud-functions typing speed?

CodeSpeedTest offers 10+ real Google-cloud-functions code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.