2024-01-04 17:27:47 +00:00
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>hyparquet parquet file parser</title>
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<style>
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#dropzone {
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position: absolute;
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bottom: 10px;
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box-sizing: border-box;
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top: 10px;
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left: 10px;
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right: 10px;
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border: 2px dashed #08e;
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border-radius: 10px;
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padding: 10px;
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display: flex;
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align-items: center;
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justify-content: center;
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color: #444;
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font-family: sans-serif;
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font-size: 20px;
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overflow-y: auto;
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white-space: pre-wrap;
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}
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.over {
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background-color: lightblue;
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}
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</style>
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</head>
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<body>
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<div id="dropzone">Drop .parquet file here</div>
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<script type="module">
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2024-01-04 19:11:00 +00:00
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import { parquetMetadata, toJson } from './src/metadata.js'
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2024-01-04 17:27:47 +00:00
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const dropZone = document.getElementById('dropzone')
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dropZone.addEventListener('dragover', e => {
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e.preventDefault()
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e.dataTransfer.dropEffect = 'copy'
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dropZone.classList.add('over')
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})
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dropZone.addEventListener('dragleave', () => {
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dropZone.classList.remove('over')
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})
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dropZone.addEventListener('drop', e => {
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e.preventDefault() // prevent dropped file from being "downloaded"
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dropZone.classList.remove('over')
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const files = e.dataTransfer.files
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if (files.length > 0) {
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const file = files[0]
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const reader = new FileReader()
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reader.onload = async (e) => {
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const arrayBuffer = e.target.result
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const metadata = toJson(parquetMetadata(arrayBuffer))
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console.log(metadata)
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// display metadata
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dropZone.innerText = file.name
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dropZone.innerText += `\n${JSON.stringify(metadata, null, 2)}`
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}
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reader.onerror = e => {
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console.error('Error reading file', e)
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dropZone.innerText = `Error reading file\n${e.target.error}`
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}
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reader.readAsArrayBuffer(file)
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}
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})
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</script>
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</body>
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</html>
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