Build a Google Drive File Manager with React & Google API to Upload, Download, and Manage Files

App.jsx

import React, { useEffect, useState } from "react";
import { Container, Button, ListGroup, Row, Col, Form } from "react-bootstrap";
import { GoogleLogin } from "react-google-login";
import { gapi } from "gapi-script";
import "bootstrap/dist/css/bootstrap.min.css";

// Your Google Client ID
const CLIENT_ID =
  "";

const App = () => {
  const [isAuthenticated, setIsAuthenticated] = useState(false);
  const [files, setFiles] = useState([]);
  const [error, setError] = useState("");
  const [selectedFile, setSelectedFile] = useState(null);

  // Load Google API client
  useEffect(() => {
    gapi.load("client:auth2", initClient);
  }, []);

  // Initialize the Google API client
  const initClient = () => {
    gapi.client.init({
      apiKey: "AIzaSyD_GVnWwh42673ikySb0WRAjpteVg2GPT4", // Your API key
      clientId: CLIENT_ID,
      scope: "https://www.googleapis.com/auth/drive.file",
      discoveryDocs: [
        "https://www.googleapis.com/discovery/v1/apis/drive/v3/rest",
      ],
    });
  };

  // Handle login success
  const handleLoginSuccess = (response) => {
    setIsAuthenticated(true);
    gapi.auth2.getAuthInstance().signIn();
    listFiles();
  };

  // Handle login failure
  const handleLoginFailure = (response) => {
    setError("Failed to authenticate with Google.");
  };

  // List files from Google Drive
  const listFiles = () => {
    gapi.client.drive.files
      .list({ pageSize: 10, fields: "files(id, name, mimeType)" })
      .then((response) => {
        setFiles(response.result.files);
      })
      .catch((err) => {
        setError("Error fetching files from Google Drive.");
        console.error(err);
      });
  };

  // Download file function
  // Download file function
  const downloadFile = (fileId, fileName) => {
    const accessToken = gapi.auth.getToken().access_token; // Get the access token

    fetch(https://www.googleapis.com/drive/v3/files/${fileId}?alt=media, {
      headers: {
        Authorization: Bearer ${accessToken},
      },
    })
      .then((response) => {
        if (!response.ok) {
          throw new Error("Failed to download the file.");
        }
        return response.blob(); // Convert the response to a Blob
      })
      .then((blob) => {
        const url = window.URL.createObjectURL(blob); // Create a download URL
        const link = document.createElement("a");
        link.href = url;
        link.download = fileName; // Set the file name
        document.body.appendChild(link);
        link.click(); // Trigger the download
        document.body.removeChild(link); // Clean up
      })
      .catch((err) => {
        setError("Error downloading the file.");
        console.error(err);
      });
  };

  // Upload file function
  const uploadFile = () => {
    if (!selectedFile) {
      setError("Please select a file to upload.");
      return;
    }

    const fileMetadata = {
      name: selectedFile.name,
    };

    const formData = new FormData();
    formData.append(
      "metadata",
      new Blob([JSON.stringify(fileMetadata)], { type: "application/json" })
    );
    formData.append("file", selectedFile);

    fetch(
      "https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart",
      {
        method: "POST",
        headers: {
          Authorization: Bearer ${gapi.auth.getToken().access_token},
        },
        body: formData,
      }
    )
      .then((response) => response.json())
      .then(() => {
        setError("");
        setSelectedFile(null);
        listFiles(); // Refresh the file list
      })
      .catch((err) => {
        setError("Error uploading the file.");
        console.error(err);
      });
  };

  return (
    <Container className="my-4">
      <h1 className="text-center">Google Drive File Viewer</h1>

      {!isAuthenticated ? (
        <GoogleLogin
          clientId={CLIENT_ID}
          buttonText="Login with Google"
          onSuccess={handleLoginSuccess}
          onFailure={handleLoginFailure}
          cookiePolicy="single_host_origin"
          scope="https://www.googleapis.com/auth/drive.file"
        />
      ) : (
        <>
          <h5>Files in Google Drive</h5>
          {error && <div className="alert alert-danger">{error}</div>}
          <div className="d-flex justify-content-between mb-3">
            <Form.Control
              type="file"
              onChange={(e) => setSelectedFile(e.target.files[0])}
              style={{ maxWidth: "300px" }}
            />
            <Button variant="success" onClick={uploadFile}>
              Upload File
            </Button>
            <Button variant="primary" onClick={listFiles}>
              Refresh List
            </Button>
          </div>
          <ListGroup>
            {files.map((file) => (
              <ListGroup.Item key={file.id}>
                <Row className="align-items-center">
                  <Col>
                    <a
                      href={https://drive.google.com/file/d/${file.id}/view}
                      target="_blank"
                      rel="noopener noreferrer"
                    >
                      {file.name}
                    </a>
                  </Col>
                  <Col xs="auto">
                    <Button
                      variant="primary"
                      onClick={() => downloadFile(file.id, file.name)}
                    >
                      Download
                    </Button>
                  </Col>
                </Row>
              </ListGroup.Item>
            ))}
          </ListGroup>
        </>
      )}
    </Container>
  );
};

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import React, { useEffect, useState } from "react";

import { Container, Button, ListGroup, Row, Col, Form } from "react-bootstrap";

import { GoogleLogin } from "react-google-login";

import { gapi } from "gapi-script";

import "bootstrap/dist/css/bootstrap.min.css";

// Your Google Client ID

const CLIENT_ID =

"";

const App = () => {

const [isAuthenticated, setIsAuthenticated] = useState(false);

const [files, setFiles] = useState([]);

const [error, setError] = useState("");

const [selectedFile, setSelectedFile] = useState(null);

// Load Google API client

useEffect(() => {

gapi.load("client:auth2", initClient);

}, []);

// Initialize the Google API client

const initClient = () => {

gapi.client.init({

apiKey: "AIzaSyD_GVnWwh42673ikySb0WRAjpteVg2GPT4", // Your API key

clientId: CLIENT_ID,

scope: "https://www.googleapis.com/auth/drive.file",

discoveryDocs: [

"https://www.googleapis.com/discovery/v1/apis/drive/v3/rest",

});

};

// Handle login success

const handleLoginSuccess = (response) => {

setIsAuthenticated(true);

gapi.auth2.getAuthInstance().signIn();

listFiles();

};

// Handle login failure

const handleLoginFailure = (response) => {

setError("Failed to authenticate with Google.");

};

// List files from Google Drive

const listFiles = () => {

gapi.client.drive.files

.list({ pageSize: 10, fields: "files(id, name, mimeType)" })

.then((response) => {

setFiles(response.result.files);

})

.catch((err) => {

setError("Error fetching files from Google Drive.");

console.error(err);

});

};

// Download file function

const downloadFile = (fileId, fileName) => {

const accessToken = gapi.auth.getToken().access_token; // Get the access token

fetch(https://www.googleapis.com/drive/v3/files/${fileId}?alt=media, {

headers: {

Authorization: Bearer ${accessToken},

})

.then((response) => {

if (!response.ok) {

throw new Error("Failed to download the file.");

}

return response.blob(); // Convert the response to a Blob

})

.then((blob) => {

const url = window.URL.createObjectURL(blob); // Create a download URL

const link = document.createElement("a");

link.href = url;

link.download = fileName; // Set the file name

document.body.appendChild(link);

link.click(); // Trigger the download

document.body.removeChild(link); // Clean up

})

.catch((err) => {

setError("Error downloading the file.");

console.error(err);

});

};

// Upload file function

const uploadFile = () => {

if (!selectedFile) {

setError("Please select a file to upload.");

return;

}

const fileMetadata = {

name: selectedFile.name,

};

const formData = new FormData();

formData.append(

"metadata",

new Blob([JSON.stringify(fileMetadata)], { type: "application/json" })

);

formData.append("file", selectedFile);

fetch(

"https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart",

{

method: "POST",

headers: {

Authorization: Bearer ${gapi.auth.getToken().access_token},

body: formData,

}

)

.then((response) => response.json())

.then(() => {

setError("");

setSelectedFile(null);

listFiles(); // Refresh the file list

})

.catch((err) => {

setError("Error uploading the file.");

console.error(err);

});

};

return (

<h1 className="text-center">Google Drive File Viewer</h1>

{!isAuthenticated ? (

<GoogleLogin

clientId={CLIENT_ID}

buttonText="Login with Google"

onSuccess={handleLoginSuccess}

onFailure={handleLoginFailure}

cookiePolicy="single_host_origin"

scope="https://www.googleapis.com/auth/drive.file"

) : (

<h5>Files in Google Drive</h5>

{error && <div className="alert alert-danger">{error}</div>}

<Form.Control

type="file"

onChange={(e) => setSelectedFile(e.target.files[0])}

style={{ maxWidth: "300px" }}

Upload File

</Button>

Refresh List

</Button>

</div>

{files.map((file) => (

<ListGroup.Item key={file.id}>

<Col>

href={https://drive.google.com/file/d/${file.id}/view}

target="_blank"

rel="noopener noreferrer"

{file.name}

</a>

</Col>

<Button

variant="primary"

onClick={() => downloadFile(file.id, file.name)}

Download

</Button>

</Col>

</Row>

</ListGroup.Item>

))}

</ListGroup>

</>

)}

</Container>

);

};

Build a Google Drive File Manager with React & Google API to Upload, Download, and Manage Files

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