react-forum

Capture image with webcam and send it to API as base64 or as image (buffer?)

Jjoaocasarin

10/18/2022

So, the idea is to capture an image using the laptop webcam on React, and after getting the image, send it to an API either as a base64 string or as an image (maybe this last one would be a buffer?) How can I do that? I found nothing clear on internet 😦 maybe I am not understanding well

Solution:

```js import { useEffect, useRef, useState } from "react"; export default function Home() { const videoRef = useRef();...

Jump to solution

UUUnknown User

10/18/2022

2 Messages Not Public

Jjoeydi

10/18/2022

@casarin - Hey I took some time this afternoon to get this set up: https://webcamupload.netlify.app/

Solution

Jjoeydi

10/18/2022

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

export default function Home() {
    const videoRef = useRef();
    const canvasRef = useRef();
    const [imageUrl, setImageUrl] = useState();

    useEffect(() => {
        if (navigator.mediaDevices.getUserMedia) {
            navigator.mediaDevices
                .getUserMedia({ video: true })
                .then(function (stream) {
                    videoRef.current.srcObject = stream;
                    videoRef.current.play();
                })
                .catch(function (error) {
                    console.log("Something went wrong!", error);
                });
        }
    }, []);

    const takePicture = function () {
        const context = canvasRef.current.getContext("2d");
        context.drawImage(videoRef.current, 0, 0, 640, 480);
    };

    const uploadPicture = async function () {
        const image = canvasRef.current.toDataURL("image/png");
        const response = await fetch("/api/upload", {
            method: "POST",
            body: image,
        });
        const data = await response.json();
        setImageUrl(data.secure_url);
    };

    return (
        <div className="container">
            <video ref={videoRef} width="640" height="480" />

            <div className="controls">
                <canvas ref={canvasRef} width="640" height="480"></canvas>
                <div>
                    <button onClick={takePicture}>Take Picture</button>
                    <br />
                    <button onClick={uploadPicture}>Upload Picture</button>
                    <br />
                </div>
            </div>
            {imageUrl && (
                <a href={imageUrl} target="_blank" rel="noopener noreferrer">
                    {imageUrl}
                </a>
            )}
        </div>
    );
}

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

export default function Home() {
    const videoRef = useRef();
    const canvasRef = useRef();
    const [imageUrl, setImageUrl] = useState();

    useEffect(() => {
        if (navigator.mediaDevices.getUserMedia) {
            navigator.mediaDevices
                .getUserMedia({ video: true })
                .then(function (stream) {
                    videoRef.current.srcObject = stream;
                    videoRef.current.play();
                })
                .catch(function (error) {
                    console.log("Something went wrong!", error);
                });
        }
    }, []);

    const takePicture = function () {
        const context = canvasRef.current.getContext("2d");
        context.drawImage(videoRef.current, 0, 0, 640, 480);
    };

    const uploadPicture = async function () {
        const image = canvasRef.current.toDataURL("image/png");
        const response = await fetch("/api/upload", {
            method: "POST",
            body: image,
        });
        const data = await response.json();
        setImageUrl(data.secure_url);
    };

    return (
        <div className="container">
            <video ref={videoRef} width="640" height="480" />

            <div className="controls">
                <canvas ref={canvasRef} width="640" height="480"></canvas>
                <div>
                    <button onClick={takePicture}>Take Picture</button>
                    <br />
                    <button onClick={uploadPicture}>Upload Picture</button>
                    <br />
                </div>
            </div>
            {imageUrl && (
                <a href={imageUrl} target="_blank" rel="noopener noreferrer">
                    {imageUrl}
                </a>
            )}
        </div>
    );
}

Jjoeydi

10/18/2022

const cloudinary = require("cloudinary").v2;

cloudinary.config({ secure: true });

export default async function handler(req, res) {
    try {
        const result = await cloudinary.uploader.upload(req.body, {
            folder: "webcamtest",
        });
        res.status(200).json(result);
    } catch (error) {
        res.status(500).json(error);
    }
}

const cloudinary = require("cloudinary").v2;

cloudinary.config({ secure: true });

export default async function handler(req, res) {
    try {
        const result = await cloudinary.uploader.upload(req.body, {
            folder: "webcamtest",
        });
        res.status(200).json(result);
    } catch (error) {
        res.status(500).json(error);
    }
}

This is using the Cloudinary API and Node.js SDK for the uploads, but you could swap out whatever API you wanted.

Jjoaocasarin

10/19/2022

yo, thanks for that link, it wasnt available when i searched for the subject... just for curiosity, what did you mean with "Hope ethos is being considered"? ahhaha hey @joeydi what a cool implementation, lol! I think this would fit as the solution for the topic 😄 thanks a lot!

UUUnknown User

10/19/2022

Message Not Public

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