Encrypt uploads in the browser and send them in chunks
A 6 GB upload kept a customer waiting long after its progress bar
reached 100%. The server wrote every upload three times: PHP's
temporary file, Livewire's copy of it ("Processing files...") and the
encrypted file ("Create Share Link"), each a full rewrite of a slow
disk. The unencrypted copy also stayed behind in livewire-tmp.
Now the uploader's browser encrypts each file in 16 MB chunks with
WebCrypto and PUTs them one at a time; the server checks each chunk in
memory and writes it once, already encrypted. Creating the share only
wraps its key and saves the options. A 200 MB upload through the
Docker image took 2.8 s, and its download matched byte for byte.
- SEALCHK2: a 19-byte header (chunk size, 7-byte nonce prefix), then
ciphertext and tag per chunk. Each nonce holds the chunk index and a
last-chunk flag (the STREAM construction), so cut or reordered files
fail to decrypt. SEALCHK1 and the single-block format still read.
- Envelope encryption: one random key per share. With a password it is
wrapped with Argon2id (sodium, libsodium's interactive limits) in
shares.wrapped_key, which names its parameters. Password shares from
before keep their PBKDF2-derived key.
- The upload page registers each selection with FileUploader into a
pending share of its own, lists the files with their progress, retries
a failed chunk after 1-16 s, then offers Retry; Remove and Cancel
abort. UploadChunkController only accepts chunks from the session that
started the share: a repeat is acknowledged, a skip gets 409 with the
count stored. Chunks go out as Blobs, which Chromium sends about eight
times faster than ArrayBuffers.
- Uploads need a secure context: over plain HTTP the page says HTTPS is
needed and takes no files. The Docker image gains AUTO_HTTPS, which
serves Let's Encrypt on 443 for SERVER_NAME and redirects 80; without
it the container stays on HTTP 80 behind a proxy. docker/Caddyfile was
never loaded and is gone; docker/healthcheck.sh covers both modes.
- "Download all" streams the ZIP with maennchen/zipstream-php (STORE,
ZIP64) instead of decrypting whole files into memory and writing the
archive unencrypted to /tmp.
- Pending shares count towards the quota, stay out of the admin
dashboard and 404 everywhere else. shares:cleanup deletes uploads idle
for 4 hours and Livewire temporary files older than that.
- PHP's upload limits no longer cap the admin's max file size and
default to 64M; LIVEWIRE_MAX_UPLOAD_TIME is gone and
UPLOAD_CHUNK_SIZE_MB is new.
- Tests cover the format, key wrapping, registration limits, the chunk
endpoint's answers, completing a share, the streamed ZIP, cleanup,
and in Chromium a real chunked upload and the HTTPS warning; the
selected-files overflow test runs again. README, website, CHANGELOG
and .ai/rules follow.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
co-authored by
Claude Opus 5
parent
504971ad7f
commit
40e35bab0e
@@ -122,8 +122,8 @@
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/*
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* resources/views/livewire/file-uploader.blade.php: the drop zone's dashed outline and its
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* primary tint while dragging. `data-dragging` is Alpine's, not the package's, since no
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* component tracks a native drag over an arbitrary drop target; disabled while an upload runs
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* blocks pointer events and dims to M3's disabled-content opacity, as a code dims elsewhere while
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* component tracks a native drag over an arbitrary drop target; disabled where uploads cannot run
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* (no secure context) blocks pointer events and dims to M3's disabled-content opacity, as a code dims elsewhere while
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* busy (.settings-recovery-code--loading).
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*/
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.upload-drop-zone {
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@@ -203,12 +203,6 @@
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color: var(--md-sys-color-on-primary-container);
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}
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/* resources/views/livewire/file-uploader.blade.php: the "Processing files..." indicator at 1.x's smaller size, beside its label. */
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.upload-processing-indicator {
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inline-size: 2rem;
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block-size: 2rem;
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}
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/* resources/views/livewire/file-uploader.blade.php: the selected-files list scrolls on its own past 1.x's cap instead of pushing the options and the submit button down the page. */
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.upload-file-list {
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max-block-size: 18rem;
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@@ -1,3 +1,4 @@
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// Livewire Material. Alpine is bundled and started by Livewire 4: never import it here as well.
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import '../../vendor/nonameweb/livewire-material/resources/js/material.js'
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import './share-created.js'
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import './share-uploader.js'
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@@ -0,0 +1,317 @@
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/**
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* `shareUploader`: the upload page's queue. Files are registered with the Livewire component in one
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* batch per selection, then sent one at a time: each chunk is sliced from the file, encrypted here
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* with AES-256-GCM and PUT on its own, so the server writes it once, already encrypted.
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*
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* The encrypted format is App\Services\FileEncryptionService's SEALCHK2: chunk i's nonce is the
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* file's 7-byte prefix, i as a big-endian uint32 and a byte that is 1 on the last chunk; WebCrypto
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* appends the 16-byte tag to the ciphertext, which is how the server stores it.
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*
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* A failed request is retried after 1, 2, 4, 8 and 16 seconds; after that the file waits for its
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* Retry button, which picks up from the chunk the server last confirmed. The server answers 409
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* with its own count when a chunk skips ahead, and acknowledges a chunk it already has.
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*/
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const RETRY_DELAYS = [1000, 2000, 4000, 8000, 16000]
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document.addEventListener('alpine:init', () => {
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window.Alpine.data('shareUploader', ({ csrfToken, messages }) => ({
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secure: window.isSecureContext && Boolean(window.crypto?.subtle),
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dragging: false,
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busy: false,
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/** Files waiting to be sent, in order: { id, file, target, nextIndex }. */
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queue: [],
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/** Every file this page registered, by id: { state: 'queued'|'uploading'|'uploaded'|'failed', sent, size }. */
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uploads: {},
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/** The files that failed, by id, kept for their Retry button. */
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failed: {},
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/** The request on its way, so Cancel and Remove can abort it. */
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request: null,
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get progress() {
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const unfinished = Object.values(this.uploads).filter((upload) => upload.state !== 'failed')
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const size = unfinished.reduce((total, upload) => total + upload.size, 0)
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return size === 0 ? 0 : (unfinished.reduce((total, upload) => total + upload.sent, 0) / size) * 100
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},
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choose(event) {
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this.add([...event.target.files].map((file) => ({ file, path: null })))
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event.target.value = ''
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},
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handleDrop(event) {
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this.dragging = false
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if (! this.secure) {
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return
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}
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const items = event.dataTransfer.items
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const files = []
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for (let i = 0; i < items.length; i++) {
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const entry = items[i].webkitGetAsEntry?.()
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if (entry) {
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this.traverseEntry(entry, '', files)
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} else if (items[i].kind === 'file') {
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files.push({ file: items[i].getAsFile(), path: null })
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}
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}
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// Directory entries are read asynchronously.
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setTimeout(() => this.add(files), 500)
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},
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traverseEntry(entry, path, files) {
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if (entry.isFile) {
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entry.file((file) => files.push({ file, path: path ? `${path}/${file.name}` : null }))
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} else if (entry.isDirectory) {
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entry.createReader().readEntries((entries) => {
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entries.forEach((child) => this.traverseEntry(child, path ? `${path}/${entry.name}` : entry.name, files))
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})
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}
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},
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async add(selection) {
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if (! this.secure || selection.length === 0) {
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return
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}
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const targets = await this.$wire.registerFiles(selection.map(({ file, path }) => ({ name: file.name, size: file.size, path })))
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;(targets ?? []).forEach((target, position) => {
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if (! target) {
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return
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}
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this.uploads[target.id] = { state: 'queued', sent: 0, size: selection[position].file.size }
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this.queue.push({ id: target.id, file: selection[position].file, target, nextIndex: 0 })
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})
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this.run()
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},
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async run() {
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if (this.busy) {
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return
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}
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this.busy = true
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while (this.queue.length > 0) {
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const item = this.queue[0]
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const uploaded = await this.upload(item)
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if (this.queue[0] === item) {
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this.queue.shift()
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}
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if (uploaded) {
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await this.$wire.$refresh()
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}
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}
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this.busy = false
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},
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/**
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* Send one file's remaining chunks; true once the server has them all.
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*/
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async upload(item) {
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const { id, file, target } = item
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const upload = this.uploads[id]
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if (! upload) {
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return false
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}
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upload.state = 'uploading'
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try {
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const key = await crypto.subtle.importKey('raw', bytesFromHex(target.key), 'AES-GCM', false, ['encrypt'])
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const noncePrefix = bytesFromHex(target.noncePrefix)
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while (item.nextIndex < target.chunkCount) {
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const index = item.nextIndex
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const start = index * target.chunkSize
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const plaintext = await file.slice(start, start + target.chunkSize).arrayBuffer()
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const ciphertext = await crypto.subtle.encrypt(
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{ name: 'AES-GCM', iv: chunkNonce(noncePrefix, index, index === target.chunkCount - 1), tagLength: 128 },
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key,
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plaintext,
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)
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item.nextIndex = await this.send(upload, `${target.url}/${index}`, ciphertext, start, plaintext.byteLength)
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upload.sent = Math.min(item.nextIndex * target.chunkSize, upload.size)
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}
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} catch (error) {
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if (error?.name === 'AbortError') {
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return false
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}
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upload.state = 'failed'
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this.failed[id] = item
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if (error?.status === 419) {
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window.materialToast(messages.sessionExpired, { type: 'error' })
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}
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return false
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}
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upload.state = 'uploaded'
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return true
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},
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/**
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* PUT one encrypted chunk, retrying transient failures; resolves with the number of chunks
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* the server holds for the file.
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*/
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async send(upload, url, body, offset, plaintextLength) {
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for (let attempt = 0; ; attempt++) {
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const response = await this.put(url, body, (loaded) => {
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upload.sent = Math.min(offset + (loaded / body.byteLength) * plaintextLength, upload.size)
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})
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if ((response.status === 200 || response.status === 409) && Number.isInteger(response.uploadedChunks)) {
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return response.uploadedChunks
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}
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if (response.status === 404 || response.status === 419 || attempt === RETRY_DELAYS.length) {
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throw Object.assign(new Error('Upload failed'), { status: response.status })
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}
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await new Promise((resolve) => setTimeout(resolve, RETRY_DELAYS[attempt]))
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}
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},
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put(url, body, onProgress) {
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return new Promise((resolve, reject) => {
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const xhr = new XMLHttpRequest()
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xhr.open('PUT', url)
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xhr.setRequestHeader('Content-Type', 'application/octet-stream')
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xhr.setRequestHeader('Accept', 'application/json')
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xhr.setRequestHeader('X-CSRF-TOKEN', csrfToken)
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xhr.upload.onprogress = (event) => onProgress(event.loaded)
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xhr.onload = () => {
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this.request = null
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resolve({ status: xhr.status, uploadedChunks: parseUploadedChunks(xhr.responseText) })
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}
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xhr.onerror = () => {
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this.request = null
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resolve({ status: 0 })
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}
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xhr.onabort = () => {
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this.request = null
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reject(new DOMException('Upload cancelled', 'AbortError'))
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}
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this.request = xhr
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// Chromium sends a Blob body about eight times faster than the same ArrayBuffer.
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xhr.send(new Blob([body]))
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})
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},
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retry(id) {
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const item = this.failed[id]
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if (! item) {
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return
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}
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delete this.failed[id]
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this.uploads[id].state = 'queued'
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this.queue.push(item)
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this.run()
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},
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remove(id) {
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this.forget([id])
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this.$wire.removeFiles([id])
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},
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/**
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* Stop everything still to send and take those files out of the share.
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*/
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cancel() {
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const unfinished = Object.entries(this.uploads)
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.filter(([, upload]) => upload.state !== 'uploaded')
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.map(([id]) => Number(id))
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this.forget(unfinished)
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this.$wire.removeFiles(unfinished)
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},
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forget(ids) {
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const current = this.queue[0]
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this.queue = this.queue.filter((item) => ! ids.includes(item.id))
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ids.forEach((id) => {
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delete this.uploads[id]
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delete this.failed[id]
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})
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if (current && ids.includes(current.id)) {
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this.request?.abort()
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}
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},
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statusOf(id, uploaded) {
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const upload = this.uploads[id]
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if (uploaded || upload?.state === 'uploaded') {
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return messages.uploaded
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}
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if (upload?.state === 'uploading') {
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return `${Math.round((upload.sent / Math.max(upload.size, 1)) * 100)}%`
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}
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return upload?.state === 'failed' ? messages.failed : messages.queued
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},
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warnBeforeLeaving(event) {
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if (this.busy) {
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event.preventDefault()
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event.returnValue = ''
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}
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},
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}))
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})
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function bytesFromHex(hex) {
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return Uint8Array.from(hex.match(/.{2}/g), (pair) => parseInt(pair, 16))
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}
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/**
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* Chunk `index`'s 12-byte nonce: the file's prefix, the index as a big-endian uint32 and the
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* last-chunk flag.
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*/
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function chunkNonce(prefix, index, isLast) {
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const nonce = new Uint8Array(12)
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nonce.set(prefix, 0)
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new DataView(nonce.buffer).setUint32(7, index)
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nonce[11] = isLast ? 1 : 0
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return nonce
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}
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function parseUploadedChunks(responseText) {
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try {
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return JSON.parse(responseText).uploaded_chunks
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} catch {
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return undefined
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}
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}
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@@ -179,9 +179,7 @@
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:label="__('Max file size (MB)')"
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type="number"
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||||
min="1"
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:max="$phpMaxUploadMb"
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||||
suffix="MB"
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||||
:hint="__('PHP limit: :max MB (upload_max_filesize / post_max_size)', ['max' => $phpMaxUploadMb])"
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/>
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<x-input full wire:model="maxFilesPerShare" :label="__('Max files per share')" type="number" min="1" />
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@@ -12,85 +12,33 @@
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</x-stack>
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</x-stack>
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||||
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@if ($isStorageFull)
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{{-- Files this page already uploaded count towards the quota: they can still become a share. --}}
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||||
@if ($isStorageFull && $pendingFiles->isEmpty())
|
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<x-alert color="warning" :title="__('Storage is full. Uploads are temporarily disabled.')" />
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||||
@else
|
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<x-form
|
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wire:submit="createShare"
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||||
x-data="{
|
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uploading: false,
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progress: 0,
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dragging: false,
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handleDrop(e) {
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this.dragging = false;
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const items = e.dataTransfer.items;
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const files = [];
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for (let i = 0; i < items.length; i++) {
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const entry = items[i].webkitGetAsEntry?.();
|
||||
if (entry) {
|
||||
this.traverseEntry(entry, '', files);
|
||||
} else if (items[i].kind === 'file') {
|
||||
files.push({ file: items[i].getAsFile(), path: null });
|
||||
}
|
||||
}
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||||
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||||
setTimeout(() => {
|
||||
if (! files.length) {
|
||||
return;
|
||||
}
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||||
|
||||
const dt = new DataTransfer();
|
||||
const paths = [];
|
||||
files.forEach(f => {
|
||||
dt.items.add(f.file);
|
||||
paths.push(f.path);
|
||||
});
|
||||
|
||||
$wire.relativePaths = [...($wire.relativePaths ?? []), ...paths];
|
||||
|
||||
this.uploading = true;
|
||||
this.progress = 0;
|
||||
|
||||
$wire.uploadMultiple(
|
||||
'files',
|
||||
dt.files,
|
||||
() => this.progress = 100,
|
||||
() => this.resetUpload(),
|
||||
(event) => this.progress = event.detail.progress,
|
||||
() => this.resetUpload(),
|
||||
);
|
||||
}, 500);
|
||||
},
|
||||
resetUpload() {
|
||||
this.uploading = false;
|
||||
this.progress = 0;
|
||||
},
|
||||
traverseEntry(entry, path, files) {
|
||||
if (entry.isFile) {
|
||||
entry.file(file => {
|
||||
files.push({ file, path: path ? path + '/' + file.name : null });
|
||||
});
|
||||
} else if (entry.isDirectory) {
|
||||
const reader = entry.createReader();
|
||||
reader.readEntries(entries => {
|
||||
entries.forEach(e => this.traverseEntry(e, path ? path + '/' + entry.name : entry.name, files));
|
||||
});
|
||||
}
|
||||
}
|
||||
}"
|
||||
x-init="$wire.$on('files-processed', () => resetUpload())"
|
||||
x-on:livewire-upload-start="uploading = true; progress = 0"
|
||||
x-on:livewire-upload-finish="progress = 100"
|
||||
x-on:livewire-upload-cancel="resetUpload()"
|
||||
x-on:livewire-upload-error="resetUpload()"
|
||||
x-on:livewire-upload-progress="progress = $event.detail.progress"
|
||||
x-data="shareUploader({
|
||||
csrfToken: {{ \Illuminate\Support\Js::from(csrf_token()) }},
|
||||
messages: {{ \Illuminate\Support\Js::from([
|
||||
'queued' => __('Waiting'),
|
||||
'uploaded' => __('Uploaded'),
|
||||
'failed' => __('Upload failed'),
|
||||
'sessionExpired' => __('Your session expired. Reload the page to upload again.'),
|
||||
]) }},
|
||||
})"
|
||||
x-on:beforeunload.window="warnBeforeLeaving($event)"
|
||||
>
|
||||
{{-- WebCrypto, which encrypts the files in the browser, only exists on HTTPS (or localhost). --}}
|
||||
<div x-show="! secure" x-cloak data-test="insecure-context">
|
||||
<x-alert color="warning" :title="__('Uploads need a secure connection (HTTPS).')" :description="__('Ask the administrator to serve this site over HTTPS.')" />
|
||||
</div>
|
||||
|
||||
{{-- Drop zone: the shape behind the icon turns into a burst while files are over it. --}}
|
||||
<div
|
||||
class="upload-drop-zone"
|
||||
x-bind:data-dragging="dragging ? 'true' : 'false'"
|
||||
x-bind:aria-disabled="uploading ? 'true' : 'false'"
|
||||
x-bind:aria-disabled="secure ? 'false' : 'true'"
|
||||
x-on:dragover.prevent="dragging = true"
|
||||
x-on:dragleave.prevent="dragging = false"
|
||||
x-on:drop.prevent="handleDrop($event)"
|
||||
@@ -108,25 +56,21 @@
|
||||
<p class="md-type-body-md md-ink-variant md-text-center">{{ __('or click to browse') }}</p>
|
||||
</x-stack>
|
||||
|
||||
{{-- The button is the tab stop and opens the browser's own picker; the input only carries the upload. --}}
|
||||
<x-button :label="__('Browse Files')" icon="folder_open" variant="outlined" x-on:click="$refs.picker.click()" x-bind:disabled="uploading" />
|
||||
<input type="file" wire:model="files" multiple hidden x-ref="picker" x-bind:disabled="uploading" />
|
||||
{{-- The button is the tab stop and opens the browser's own picker; the input only carries the selection. --}}
|
||||
<x-button :label="__('Browse Files')" icon="folder_open" variant="outlined" x-on:click="$refs.picker.click()" x-bind:disabled="! secure" />
|
||||
<input type="file" multiple hidden x-ref="picker" x-on:change="choose($event)" x-bind:disabled="! secure" data-test="file-input" />
|
||||
</x-stack>
|
||||
</div>
|
||||
|
||||
{{-- Upload progress --}}
|
||||
<div x-show="uploading" x-cloak data-test="upload-progress">
|
||||
<x-stack x-show="progress < 100" gap="space100">
|
||||
{{-- Upload progress, over every file still to send --}}
|
||||
<div x-show="busy" x-cloak data-test="upload-progress">
|
||||
<x-stack gap="space100">
|
||||
<x-row justify="between">
|
||||
<span class="md-type-label-lg">{{ __('Uploading...') }} <span x-text="Math.round(progress)"></span>%</span>
|
||||
<x-button :label="__('Cancel')" size="xs" x-on:click="$wire.cancelUpload('files')" />
|
||||
<x-button :label="__('Cancel')" size="xs" x-on:click="cancel()" />
|
||||
</x-row>
|
||||
<x-progress bind="progress" wavy :label="__('Uploading')" />
|
||||
</x-stack>
|
||||
<x-row x-show="progress >= 100" gap="space100">
|
||||
<x-loading class="upload-processing-indicator" :label="false" />
|
||||
<span class="md-type-label-lg">{{ __('Processing files...') }}</span>
|
||||
</x-row>
|
||||
</div>
|
||||
|
||||
@error('files')
|
||||
@@ -134,21 +78,28 @@
|
||||
@enderror
|
||||
|
||||
{{-- Selected files --}}
|
||||
@if (count($files))
|
||||
@if ($pendingFiles->isNotEmpty())
|
||||
<x-stack gap="space100">
|
||||
<h2 class="md-type-title-lg">{{ __('Selected Files') }} ({{ count($files) }})</h2>
|
||||
<h2 class="md-type-title-lg">{{ __('Selected Files') }} ({{ $pendingFiles->count() }})</h2>
|
||||
|
||||
<div class="upload-file-list">
|
||||
<x-list segmented :label="__('Selected Files')">
|
||||
@foreach ($files as $index => $file)
|
||||
@foreach ($pendingFiles as $file)
|
||||
<x-list-item
|
||||
:title="$relativePaths[$index] ?? $file->getClientOriginalName()"
|
||||
:title="$file->relative_path ?? $file->original_name"
|
||||
icon="description"
|
||||
wire:key="selected-file-{{ $index }}"
|
||||
wire:key="selected-file-{{ $file->id }}"
|
||||
data-test="selected-file"
|
||||
>
|
||||
<x-slot:description><span class="md-tabular">{{ Number::fileSize($file->getSize()) }}</span></x-slot:description>
|
||||
<x-slot:description>
|
||||
<span class="md-tabular">{{ Number::fileSize($file->file_size) }}</span>
|
||||
· <span class="md-tabular" x-text="statusOf({{ $file->id }}, {{ $file->completed_at ? 'true' : 'false' }})" data-test="file-status"></span>
|
||||
</x-slot:description>
|
||||
<x-slot:end>
|
||||
<x-button icon="close" :aria-label="__('Remove')" wire:click="removeFile({{ $index }})" />
|
||||
<span x-show="uploads[{{ $file->id }}]?.state === 'failed'" x-cloak>
|
||||
<x-button icon="refresh" :aria-label="__('Retry')" x-on:click="retry({{ $file->id }})" />
|
||||
</span>
|
||||
<x-button icon="close" :aria-label="__('Remove')" x-on:click="remove({{ $file->id }})" />
|
||||
</x-slot:end>
|
||||
</x-list-item>
|
||||
@endforeach
|
||||
@@ -217,7 +168,7 @@
|
||||
size="md"
|
||||
icon="link"
|
||||
spinner="createShare"
|
||||
x-bind:disabled="uploading || {{ count($files) === 0 ? 'true' : 'false' }}"
|
||||
x-bind:disabled="busy || {{ $allFilesUploaded ? 'false' : 'true' }}"
|
||||
data-test="create-share"
|
||||
/>
|
||||
</x-slot:actions>
|
||||
|
||||
Reference in New Issue
Block a user