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john/mobile_image_capture.html

Created April 7, 2023 20:22
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Mobile web page to take photos and upload to an API
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mobile_image_capture.html
<!doctype html>
<html lang="en" data-bs-theme="auto">
<head>
<script src="https://getbootstrap.com/docs/5.3/assets/js/color-modes.js"></script>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="Mark Otto, Jacob Thornton, and Bootstrap contributors">
<meta name="generator" content="Hugo 0.111.3">
<title>WasteMAP Capture : Upload waste emissions images</title>
<script src="https://unpkg.com/vue@1.0.28/dist/vue.js"></script>
<script src="https://unpkg.com/axios@0.2.1/dist/axios.min.js"></script>
<link rel="canonical" href="/">
<link href="https://getbootstrap.com//docs/5.3/dist/css/bootstrap.min.css" rel="stylesheet"
integrity="sha384-aFq/bzH65dt+w6FI2ooMVUpc+21e0SRygnTpmBvdBgSdnuTN7QbdgL+OapgHtvPp" crossorigin="anonymous">
<!-- Favicons -->
<link rel="apple-touch-icon" href="https://getbootstrap.com/docs/5.3/assets/img/favicons/apple-touch-icon.png" sizes="180x180">
<link rel="icon" href="https://getbootstrap.com/docs/5.3/assets/img/favicons/favicon-32x32.png" sizes="32x32" type="image/png">
<link rel="icon" href="https://getbootstrap.com/docs/5.3/assets/img/favicons/favicon-16x16.png" sizes="16x16" type="image/png">
<link rel="manifest" href="https://getbootstrap.com/docs/5.3/assets/img/favicons/manifest.json">
<link rel="mask-icon" href="https://getbootstrap.com/docs/5.3/assets/img/favicons/safari-pinned-tab.svg" color="#712cf9">
<link rel="icon" href="https://getbootstrap.com/docs/5.3/assets/img/favicons/favicon.ico">
<meta name="theme-color" content="#712cf9">
<style>
.bd-placeholder-img {
font-size: 1.125rem;
text-anchor: middle;
-webkit-user-select: none;
-moz-user-select: none;
user-select: none;
}
@media (min-width: 768px) {
.bd-placeholder-img-lg {
font-size: 3.5rem;
}
}
.b-example-divider {
width: 100%;
height: 3rem;
background-color: rgba(0, 0, 0, .1);
border: solid rgba(0, 0, 0, .15);
border-width: 1px 0;
box-shadow: inset 0 .5em 1.5em rgba(0, 0, 0, .1), inset 0 .125em .5em rgba(0, 0, 0, .15);
}
.b-example-vr {
flex-shrink: 0;
width: 1.5rem;
height: 100vh;
}
.bi {
vertical-align: -.125em;
fill: currentColor;
}
.nav-scroller {
position: relative;
z-index: 2;
height: 2.75rem;
overflow-y: hidden;
}
.nav-scroller .nav {
display: flex;
flex-wrap: nowrap;
padding-bottom: 1rem;
margin-top: -1px;
overflow-x: auto;
text-align: center;
white-space: nowrap;
-webkit-overflow-scrolling: touch;
}
.btn-bd-primary {
--bd-violet-bg: #712cf9;
--bd-violet-rgb: 112.520718, 44.062154, 249.437846;
--bs-btn-font-weight: 600;
--bs-btn-color: var(--bs-white);
--bs-btn-bg: var(--bd-violet-bg);
--bs-btn-border-color: var(--bd-violet-bg);
--bs-btn-hover-color: var(--bs-white);
--bs-btn-hover-bg: #6528e0;
--bs-btn-hover-border-color: #6528e0;
--bs-btn-focus-shadow-rgb: var(--bd-violet-rgb);
--bs-btn-active-color: var(--bs-btn-hover-color);
--bs-btn-active-bg: #5a23c8;
--bs-btn-active-border-color: #5a23c8;
}
.bd-mode-toggle {
z-index: 1500;
}
</style>
</head>
<body>
<main class="container">
<div class="bg-body-tertiary p-5 rounded mt-3">
<h1>WasteMap Capture</h1>
<p class="lead">Upload photos of potential waste methane sites for inclusion in WasteMAP.</p>
<br />
<div id="app">
<div v-if="!image">
<div>Click 'Chose file' to either</div>
<h3>Take or upload a photo</h3>
<input type="file" @change="onFileChange" accept="image/*" capture="environment">
</div>
<div v-else>
<h2 v-if="uploadURL">Success! Image uploaded to WasteMAP.</h2>
<div v-if="uploadURL">This image is waiting to be evaluated and processed. Thank you for contributing to WasteMAP!</div>
<div v-if="!uploadURL" id="uploading" style="display: none; margin: 0 0 25px 0;"><i>Uploading...</i></div>
<button v-if="!uploadURL" @click="removeImage" class="btn btn-warning">Remove image</button>
<button v-if="!uploadURL" @click="uploadImage" class="btn btn-primary" onclick="document.getElementById('uploading').style.display = 'block';">Upload image</button>
<br />
<br />
<img :src="image" />
<br />
<br />
</div>
</div>
<script>
const API_ENDPOINT = ''
new Vue({
el: "#app",
data: {
image: '',
uploadURL: ''
},
methods: {
onFileChange (e) {
let files = e.target.files || e.dataTransfer.files
if (!files.length) return
this.createImage(files[0])
},
createImage (file) {
// var image = new Image()
let reader = new FileReader()
reader.onload = (e) => {
console.log('length: ', e.target.result.includes('data:image/jpeg'))
if (!e.target.result.includes('data:image/jpeg')) {
return alert('Wrong file type - JPG only.')
}
// if (e.target.result.length > MAX_IMAGE_SIZE) {
// return alert('Image is loo large.')
// }
this.image = e.target.result
}
reader.readAsDataURL(file)
},
removeImage: function (e) {
console.log('Remove clicked')
this.image = ''
},
uploadImage: async function (e) {
console.log('Upload clicked')
// Get the presigned URL
const response = await axios({
method: 'GET',
url: API_ENDPOINT
})
console.log('Response: ', response)
console.log('Uploading: ', this.image)
let binary = atob(this.image.split(',')[1])
let array = []
for (var i = 0; i < binary.length; i++) {
array.push(binary.charCodeAt(i))
}
let blobData = new Blob([new Uint8Array(array)], {type: 'image/jpeg'})
console.log('Uploading to: ', response.uploadURL)
const result = await fetch(response.uploadURL, {
method: 'PUT',
body: blobData
})
console.log('Result: ', result)
// Final URL for the user doesn't need the query string params
this.uploadURL = response.uploadURL.split('?')[0]
}
}
})
</script>
</div>
</main>
<nav class="navbar fixed-bottom navbar-expand-sm navbar-dark bg-dark">
<div class="container-fluid">
<a class="navbar-brand" href="#">WasteMAP</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarCollapse"
aria-controls="navbarCollapse" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
</div>
</div>
</nav>
<script src="https://getbootstrap.com/docs/5.3/dist/js/bootstrap.bundle.min.js"
integrity="sha384-qKXV1j0HvMUeCBQ+QVp7JcfGl760yU08IQ+GpUo5hlbpg51QRiuqHAJz8+BrxE/N"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/exif-js/2.3.0/exif.min.js"
integrity="sha512-xsoiisGNT6Dw2Le1Cocn5305Uje1pOYeSzrpO3RD9K+JTpVH9KqSXksXqur8cobTEKJcFz0COYq4723mzo88/Q=="
crossorigin="anonymous"
referrerpolicy="no-referrer"></script>
</body>
<!--
Notes:
Uploader based on this:
https://aws.amazon.com/blogs/compute/uploading-to-amazon-s3-directly-from-a-web-or-mobile-application/
For which you need to install the SAM cli:
https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/install-sam-cli.html
Sending the notification:
https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-s3-object-created-tutorial.html
Lambda to get EXIF data:
Which was based on this, but I had to update the Python version to 3.9 (3.6 is no longer supported),
and monkey with the bucket name to get it to use the one created for the app:
https://serverlessrepo.aws.amazon.com/applications/us-east-1/174570359254/exif-metadata-extractor
-->
</html>
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