How to use React and AWS S3 to implement front-end static resource storage and management

How to use React and AWS S3 to implement front-end static resource storage and management

Overview:
When developing modern web applications, we often need to handle and manage A large number of static resources, such as images, audio, video and other files. AWS S3 (abbreviation: Amazon Simple Storage Service) is a cloud storage solution that can be used to store and distribute static resources.

React is a popular front-end JavaScript library for building user interfaces. It provides a flexible, efficient and reusable way to create interactive UI components.

In this article, we will explore how to achieve the storage and management of front-end static resources by combining React and AWS S3. We'll cover how to set up an AWS S3 bucket and use React to upload, download, and delete files.

Step 1: Set up AWS S3 bucket
First, we need to set up an AWS account and then log in to the AWS management console. In the console, we create a new S3 bucket.

Open the S3 service and click the "Create Bucket" button.

In the create bucket page, fill in the name, select the appropriate geographical location, and configure it according to the default settings.

In the access permission settings, we can choose to set public access permissions for the bucket, or customize access permissions.

After completing the settings, click the "Create Bucket" button to successfully create a new S3 bucket.

Step 2: React application initialization
In the React project, we first need to install the AWS SDK in order to interact with the S3 service. You can use the following command to install AWS SDK in the project:

npm install aws-sdk

Step 3: Implement the file upload function
To implement the file upload function, we need to implement the file upload function in the React application Create an upload form and after the user selects the file, upload the file to the S3 bucket.

First, we need to import the AWS SDK and set up the AWS configuration so that we can communicate with the S3 service.

import AWS from 'aws-sdk';

// Set AWS configuration
AWS.config.update({
accessKeyId: 'your-access-key',
secretAccessKey: 'your-secret-access-key'
});

Next, we need to write a function to upload files.

const uploadFile = async (file) => {
// Create an S3 instance
const s3 = new AWS.S3();

// Define upload parameters
const params = {

Bucket: 'your-bucket-name',
Key: file.name,
Body: file

};

try {

// 执行上传操作
await s3.upload(params).promise();
console.log('文件上传成功！');

} catch (error) {

console.error('文件上传失败：', error);

}
}

In the React component, we can create a file selection form and call the uploadFile function after the user selects the file.

class UploadForm extends React.Component {
handleFileChange = (event) => {

const file = event.target.files[0];
uploadFile(file);

}

render() {

return (
  <div>
    <input type="file" onChange={this.handleFileChange} />
  </div>
);

}
}

Finally, we can use the UploadForm component in the React application to implement the file upload function.

Step 4: Implement the file download function
To implement the file download function, we need to build a download link. After the user clicks the link, the file can be downloaded locally.

First, we need to write a function to get the file URL.

const getFileUrl = (fileName) => {
// Create S3 instance
const s3 = new AWS.S3();

// Define getting URL parameters
const params = {

Bucket: 'your-bucket-name',
Key: fileName

};

// Generate URL
const url = s3.getSignedUrl('getObject', params);
return url;
}

In the React component, we can create a download link and call the getFileUrl function after the user clicks the link.

class DownloadLink extends React.Component {
handleDownload = () => {

const fileName = 'your-file-name';
const url = getFileUrl(fileName);
window.open(url, '_blank');

}

render() {

return (
  <div>
    <button onClick={this.handleDownload}>下载文件</button>
  </div>
);

}
}

Finally, we can use the DownloadLink component in the React application to implement the file download function.

Step 5: Implement the file deletion function
To implement the file deletion function, we need to write a function to delete files.

const deleteFile = async (fileName) => {
// Create S3 instance
const s3 = new AWS.S3();

// Define deletion parameters
const params = {

Bucket: 'your-bucket-name',
Key: fileName

};

try {

// 执行删除操作
await s3.deleteObject(params).promise();
console.log('文件删除成功！');

} catch (error) {

console.error('文件删除失败：', error);

}
}

In the React component, we can create a delete button and call the deleteFile function after the user clicks the button.

class DeleteButton extends React.Component {
handleDelete = () => {

const fileName = 'your-file-name';
deleteFile(fileName);

}

render() {

return (
  <div>
    <button onClick={this.handleDelete}>删除文件</button>
  </div>
);

}
}

Finally, we can use the DeleteButton component in the React application to implement the file deletion function.

Summary:
By combining React and AWS S3, we can easily implement the storage and management functions of front-end static resources. By uploading files, downloading files, and deleting files, we can effectively manage static resources in web applications.

Please note that the sample code provided in this article is for demonstration purposes only. In practice, you may need to adapt and extend it to your specific needs.

I hope this article can help you better use React and AWS S3 to store and manage front-end static resources. I wish you a happy use!

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