overleaf/services/web/frontend/js/features/binary-file/components/binary-file-text.js

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import React, { useState, useEffect } from 'react'
import PropTypes from 'prop-types'
import { useEditorContext } from '../../../shared/context/editor-context'
const MAX_FILE_SIZE = 2 * 1024 * 1024
export default function BinaryFileText({ file, onLoad, onError }) {
const { projectId } = useEditorContext({
projectId: PropTypes.string.isRequired,
})
const [textPreview, setTextPreview] = useState('')
const [shouldShowDots, setShouldShowDots] = useState(false)
useEffect(() => {
let path = `/project/${projectId}/file/${file.id}`
fetch(path, { method: 'HEAD' })
.then(response => {
if (!response.ok) throw new Error('HTTP Error Code: ' + response.status)
return response.headers.get('Content-Length')
})
.then(fileSize => {
let truncated = false
let maxSize = null
if (fileSize > MAX_FILE_SIZE) {
truncated = true
maxSize = MAX_FILE_SIZE
}
if (maxSize != null) {
path += `?range=0-${maxSize}`
}
fetch(path)
.then(response => {
response.text().then(text => {
if (truncated) {
text = text.replace(/\n.*$/, '')
}
setTextPreview(text)
onLoad()
setShouldShowDots(truncated)
})
})
.catch(err => {
onError()
console.error(err)
})
})
.catch(err => {
onError()
})
}, [projectId, file.id, onError, onLoad])
return (
<div>
{textPreview && (
<div className="text-preview">
<div className="scroll-container">
<p>{textPreview}</p>
{shouldShowDots && <p>...</p>}
</div>
</div>
)}
</div>
)
}
BinaryFileText.propTypes = {
file: PropTypes.shape({ id: PropTypes.string }).isRequired,
onLoad: PropTypes.func.isRequired,
onError: PropTypes.func.isRequired,
}