mirror of
https://github.com/screentinker/screentinker.git
synced 2026-08-13 13:53:12 -06:00
feat(content): subtitle/caption support as a content property (#223)
Subtitles/captions are set once in the content library and applied
automatically by the player — no in-player controls (the player stays bare).
- DB: 4 new content columns (captions_enabled, captions_lang for YouTube;
subtitle_url, subtitle_lang for uploaded videos), all default off/NULL.
- buildSnapshotItems: denormalize the 4 fields into published_snapshot so the
player receives them (enumerated query).
- content.js PUT: accept the 4 fields (subtitle_url only clearable here).
- POST /:id/subtitle: dedicated .vtt uploader (separate multer, since the main
filter is video/image-only); stores the file in the content dir, records
subtitle_url + subtitle_lang. Old subtitle file replaced; DELETE cleans up
the sidecar.
- Player: YouTube -> loadModule('captions') + setOption(...languageCode) in
onReady (best-effort, wrapped). Uploaded video -> a <track kind="subtitles">
appended to the <video>, forced mode='showing' on load (same-origin, so
CORS-clean like the video).
- Edit modal: YouTube gets an enable-captions checkbox + language; uploaded
video gets a .vtt file picker + language + a remove-subtitle option. en/es.
Honest limitation (in the PR): YouTube caption control via the IFrame API is
undocumented/version-dependent and only works if the video actually has
captions — hence best-effort and wrapped so it can never break playback.
Test: content-subtitles.test.js — the 4 fields survive publish -> snapshot,
the .vtt upload endpoint stores + records the file, and a non-.vtt is rejected.
Suite 550/550.
Closes #216
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
screentinker
GitHub
parent
8b661a7347
commit
8529be5a30
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@ -239,6 +239,14 @@ export default {
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'content.expires_hint': 'After this date the item stops serving and is dropped from playlists. Leave blank for no expiry.',
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'content.label_unstable_connection': 'Unstable connection (cap at 720p)',
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'content.unstable_connection_hint': 'Forces YouTube to a 720p ceiling so weak or unstable WiFi buffers less. Leave off for full quality.',
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'content.label_captions_enabled': 'Enable captions',
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'content.label_captions_lang': 'Caption language',
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'content.captions_hint': 'Turns on YouTube captions in the chosen language on every display. Availability depends on the video having captions.',
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'content.label_subtitle_file': 'Subtitle file (.vtt)',
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'content.label_subtitle_lang': 'Subtitle language',
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'content.subtitle_current': 'A subtitle track is attached. Choose a new file to replace it.',
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'content.subtitle_remove': 'Remove the current subtitle',
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'content.subtitle_hint': 'Upload a WebVTT (.vtt) file to show subtitles on this video across all displays.',
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'content.label_replace_file': 'Replace File',
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'content.replace_file_hint': 'Leave empty to keep current file',
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'content.folder_root_option': '— Root —',
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@ -196,6 +196,14 @@ export default {
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'content.label_folder': 'Carpeta',
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'content.label_unstable_connection': 'Conexión inestable (limitar a 720p)',
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'content.unstable_connection_hint': 'Fuerza un tope de 720p en YouTube para que el WiFi débil o inestable almacene menos en búfer. Déjalo desactivado para calidad completa.',
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'content.label_captions_enabled': 'Activar subtítulos',
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'content.label_captions_lang': 'Idioma de subtítulos',
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'content.captions_hint': 'Activa los subtítulos de YouTube en el idioma elegido en todas las pantallas. Depende de que el video tenga subtítulos.',
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'content.label_subtitle_file': 'Archivo de subtítulos (.vtt)',
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'content.label_subtitle_lang': 'Idioma del subtítulo',
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'content.subtitle_current': 'Hay una pista de subtítulos adjunta. Elige un archivo nuevo para reemplazarla.',
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'content.subtitle_remove': 'Quitar el subtítulo actual',
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'content.subtitle_hint': 'Sube un archivo WebVTT (.vtt) para mostrar subtítulos en este video en todas las pantallas.',
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'content.label_replace_file': 'Reemplazar archivo',
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'content.replace_file_hint': 'Déjalo vacío para mantener el archivo actual',
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'content.folder_root_option': '— Raíz —',
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@ -3,6 +3,14 @@ import { showToast } from '../components/toast.js';
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import { esc, hydrateAuthImages } from '../utils.js';
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import { t } from '../i18n.js';
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// #216: languages offered in the caption/subtitle pickers. Codes are BCP-47 primary tags —
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// enough for signage; extend as needed.
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const SUBTITLE_LANGS = [
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['en', 'English'], ['es', 'Español'], ['fr', 'Français'], ['de', 'Deutsch'],
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['pt', 'Português'], ['it', 'Italiano'], ['nl', 'Nederlands'], ['ja', '日本語'],
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['ko', '한국어'], ['zh', '中文'],
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];
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function formatFileSize(bytes) {
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if (!bytes) return '--';
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if (bytes >= 1073741824) return `${(bytes / 1073741824).toFixed(1)} GB`;
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@ -672,6 +680,11 @@ function showEditModal(contentItem, onSave) {
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const isRemote = !!contentItem.remote_url;
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const isYoutube = contentItem.mime_type === 'video/youtube';
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const isUploadedVideo = !isRemote && contentItem.mime_type?.startsWith('video/');
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// #216: language <option>s shared by the caption + subtitle pickers.
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const langOptions = (sel) => SUBTITLE_LANGS
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.map(([code, label]) => `<option value="${code}" ${sel === code ? 'selected' : ''}>${label}</option>`)
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.join('');
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overlay.innerHTML = `
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<div class="modal" style="max-width:500px;width:95vw">
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@ -724,6 +737,32 @@ function showEditModal(contentItem, onSave) {
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<p style="font-size:11px;color:var(--text-muted);margin-top:4px">${t('content.unstable_connection_hint')}</p>
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</div>
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` : ''}
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${isYoutube ? `
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<div class="form-group">
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<label style="display:flex;align-items:center;gap:8px;cursor:pointer">
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<input type="checkbox" id="editCaptionsEnabled" ${contentItem.captions_enabled ? 'checked' : ''} style="width:auto;margin:0">
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<span>${t('content.label_captions_enabled')}</span>
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</label>
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<div style="margin-top:8px">
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<label style="font-size:12px;color:var(--text-secondary)">${t('content.label_captions_lang')}</label>
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<select id="editCaptionsLang" class="input" style="background:var(--bg-input)">${langOptions(contentItem.captions_lang || 'en')}</select>
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</div>
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<p style="font-size:11px;color:var(--text-muted);margin-top:4px">${t('content.captions_hint')}</p>
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</div>
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` : ''}
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${isUploadedVideo ? `
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<div class="form-group">
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<label>${t('content.label_subtitle_file')}</label>
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${contentItem.subtitle_url ? `<p style="font-size:11px;color:var(--text-secondary);margin:2px 0 6px">${t('content.subtitle_current')}</p>` : ''}
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<input type="file" id="editSubtitleFile" accept=".vtt,text/vtt" style="font-size:13px;color:var(--text-secondary)">
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<div style="margin-top:8px">
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<label style="font-size:12px;color:var(--text-secondary)">${t('content.label_subtitle_lang')}</label>
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<select id="editSubtitleLang" class="input" style="background:var(--bg-input)">${langOptions(contentItem.subtitle_lang || 'en')}</select>
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</div>
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${contentItem.subtitle_url ? `<label style="display:flex;align-items:center;gap:8px;cursor:pointer;margin-top:8px"><input type="checkbox" id="editSubtitleRemove" style="width:auto;margin:0"><span>${t('content.subtitle_remove')}</span></label>` : ''}
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<p style="font-size:11px;color:var(--text-muted);margin-top:4px">${t('content.subtitle_hint')}</p>
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</div>
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` : ''}
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${!isRemote ? `
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<div class="form-group">
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<label>${t('content.label_replace_file')}</label>
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@ -772,6 +811,26 @@ function showEditModal(contentItem, onSave) {
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const newUnstable = unstableEl.checked ? 1 : 0;
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if (newUnstable !== (contentItem.unstable_connection ? 1 : 0)) updateData.unstable_connection = newUnstable;
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}
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// #216: YouTube captions (checkbox + language).
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const captionsEl = overlay.querySelector('#editCaptionsEnabled');
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if (captionsEl) {
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const newCaptions = captionsEl.checked ? 1 : 0;
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if (newCaptions !== (contentItem.captions_enabled ? 1 : 0)) updateData.captions_enabled = newCaptions;
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const capLang = overlay.querySelector('#editCaptionsLang')?.value || null;
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if (capLang !== (contentItem.captions_lang || 'en')) updateData.captions_lang = capLang;
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}
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// #216: uploaded-video subtitle language change / removal (the FILE is sent separately below).
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const subtitleFile = overlay.querySelector('#editSubtitleFile')?.files[0];
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const subLangEl = overlay.querySelector('#editSubtitleLang');
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const subRemove = overlay.querySelector('#editSubtitleRemove')?.checked;
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if (subRemove) {
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updateData.subtitle_url = null;
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updateData.subtitle_lang = null;
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} else if (subLangEl && !subtitleFile) {
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// Lang-only change (no new file) — the upload endpoint handles lang when a file IS sent.
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const subLang = subLangEl.value || null;
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if (contentItem.subtitle_url && subLang !== (contentItem.subtitle_lang || 'en')) updateData.subtitle_lang = subLang;
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}
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if (Object.keys(updateData).length > 0) {
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await fetch('/api/content/' + contentItem.id, {
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});
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}
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// #216: upload a new subtitle .vtt if one was chosen (skipped when "remove" is ticked).
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if (subtitleFile && !subRemove) {
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const subForm = new FormData();
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subForm.append('subtitle', subtitleFile);
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if (subLangEl?.value) subForm.append('subtitle_lang', subLangEl.value);
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await fetch('/api/content/' + contentItem.id + '/subtitle', {
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method: 'POST',
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headers,
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body: subForm
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});
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}
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overlay.remove();
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showToast(t('content.toast.updated'), 'success');
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if (onSave) onSave();
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@ -380,6 +380,15 @@ const migrations = [
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// embed at 720p (playerVars.vq='hd720') so weak/unstable WiFi on Android TV doesn't
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// buffer/stall on an auto-selected 1080p+ stream. DEFAULT 0 = no cap (today's behaviour).
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"ALTER TABLE content ADD COLUMN unstable_connection INTEGER NOT NULL DEFAULT 0",
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// #216: subtitle/caption support as a content property (applied automatically by the
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// player, no in-player controls). YouTube uses captions_enabled + captions_lang (via the
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// IFrame API); uploaded videos use subtitle_url (a .vtt filename in the content dir,
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// served at /uploads/content/<file>) + subtitle_lang for the <track> element. All default
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// off/NULL so existing content is unchanged.
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"ALTER TABLE content ADD COLUMN captions_enabled INTEGER NOT NULL DEFAULT 0",
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"ALTER TABLE content ADD COLUMN captions_lang TEXT",
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"ALTER TABLE content ADD COLUMN subtitle_url TEXT",
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"ALTER TABLE content ADD COLUMN subtitle_lang TEXT",
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];
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// Apply each ALTER idempotently. A "duplicate column name" / "already exists"
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// error means the column is already present (expected on a migrated DB) - benign.
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@ -54,4 +54,25 @@ const upload = multer({
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defParamCharset: 'utf8'
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});
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// #216: dedicated uploader for WebVTT subtitle files. The main `fileFilter` only allows
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// video/image, so subtitles need their own instance. Written into the same content dir
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// (served at /uploads/content/<file>) with a .vtt name; capped small — subtitles are tiny.
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const subtitleStorage = multer.diskStorage({
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destination: (req, file, cb) => cb(null, config.contentDir),
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filename: (req, file, cb) => cb(null, `${uuidv4()}.vtt`),
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});
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const subtitleUpload = multer({
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storage: subtitleStorage,
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limits: { fileSize: 2 * 1024 * 1024 }, // 2MB — generous for a subtitle track
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fileFilter: (req, file, cb) => {
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// Browsers send .vtt as text/vtt; some send text/plain or application/octet-stream.
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// Gate on the extension (authoritative here) plus those benign text mimetypes.
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const okExt = /\.vtt$/i.test(file.originalname || '');
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const okMime = ['text/vtt', 'text/plain', 'application/octet-stream'].includes(file.mimetype);
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if (okExt && okMime) return cb(null, true);
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cb(new Error('Only .vtt subtitle files are allowed'), false);
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},
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});
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upload.subtitleUpload = subtitleUpload;
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module.exports = upload;
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@ -2071,6 +2071,14 @@
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if (item.unstable_connection) {
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try { event.target.setPlaybackQuality('hd720'); } catch {}
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}
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// #216: turn on YouTube captions when the content is flagged. loadModule
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// makes the CC module available, then setOption selects the language track.
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// Both are best-effort (undocumented, version-dependent) — wrapped so a
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// throw can never break playback.
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if (item.captions_enabled) {
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try { event.target.loadModule('captions'); } catch {}
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try { event.target.setOption('captions', 'track', { languageCode: item.captions_lang || 'en' }); } catch {}
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}
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},
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onError: (event) => {
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if (myGeneration !== ytGeneration) return;
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@ -2462,6 +2470,22 @@
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video.crossOrigin = 'anonymous'; // texturable (CORS-clean) + matches the legacy branch
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video.playsInline = true;
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video.preload = 'auto';
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// #216: attach a WebVTT subtitle track when the content carries one (uploaded videos
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// only; remote/proxied clips are skipped). Served same-origin from /uploads/content,
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// so it's CORS-clean like the video. `default` + mode='showing' makes it visible with
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// no player controls. Old players ignore an absent subtitle_url.
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if (item.subtitle_url && !item.remote_url) {
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const track = document.createElement('track');
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track.kind = 'subtitles';
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track.srclang = item.subtitle_lang || 'en';
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track.label = item.subtitle_lang || 'Subtitles';
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track.default = true;
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track.src = `${config.serverUrl}/uploads/content/${item.subtitle_url}`;
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video.appendChild(track);
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// The `default` attribute alone doesn't always engage without controls; force it on
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// once the track has loaded its cues.
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track.addEventListener('load', () => { try { track.track.mode = 'showing'; } catch (e) {} });
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}
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video.muted = true; // warm-play MUST be muted (autoplay policy); real mute set at mount
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video.loop = (playlist.length === 1); // single-item playlist holds by looping
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video.style.cssText = 'width:100%;height:100%;object-fit:contain;background:#000';
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@ -409,7 +409,8 @@ router.put('/:id', (req, res) => {
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const content = checkContentWrite(req, res);
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if (!content) return;
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const { filename, mime_type, remote_url, folder, folder_id, expires_at, unstable_connection } = req.body;
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const { filename, mime_type, remote_url, folder, folder_id, expires_at, unstable_connection,
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captions_enabled, captions_lang, subtitle_url, subtitle_lang } = req.body;
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const updates = [];
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const values = [];
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if (filename !== undefined) { updates.push('filename = ?'); values.push(safeFilename(filename)); }
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@ -462,6 +463,21 @@ router.put('/:id', (req, res) => {
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updates.push('unstable_connection = ?');
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values.push(unstable_connection ? 1 : 0);
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}
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// #216: caption/subtitle metadata. The subtitle FILE is uploaded via POST /:id/subtitle;
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// these fields toggle YouTube captions, set languages, or clear a subtitle (subtitle_url=null).
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if (captions_enabled !== undefined) {
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updates.push('captions_enabled = ?'); values.push(captions_enabled ? 1 : 0);
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}
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if (captions_lang !== undefined) {
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updates.push('captions_lang = ?'); values.push(captions_lang ? String(captions_lang).slice(0, 10) : null);
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}
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if (subtitle_url !== undefined) {
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// Only null (clear) is accepted here — a real subtitle_url is set by the upload endpoint.
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updates.push('subtitle_url = ?'); values.push(subtitle_url ? String(subtitle_url).slice(0, 255) : null);
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}
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if (subtitle_lang !== undefined) {
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updates.push('subtitle_lang = ?'); values.push(subtitle_lang ? String(subtitle_lang).slice(0, 10) : null);
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}
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if (updates.length > 0) {
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values.push(req.params.id);
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@ -512,6 +528,29 @@ router.put('/:id/replace', upload.single('file'), async (req, res) => {
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res.json(db.prepare('SELECT * FROM content WHERE id = ?').get(req.params.id));
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});
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// #216: upload a WebVTT subtitle track for an uploaded video. Stores the .vtt in the
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// content dir (served at /uploads/content/<file>) and records its filename + language on
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// the content row. Replaces any existing subtitle (old file removed).
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router.post('/:id/subtitle', upload.subtitleUpload.single('subtitle'), async (req, res) => {
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const content = checkContentWrite(req, res);
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if (!content) {
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// checkContentWrite already sent the response; clean up the orphaned upload.
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if (req.file) { try { fs.unlinkSync(req.file.path); } catch {} }
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return;
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}
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if (!req.file) return res.status(400).json({ error: 'No subtitle file provided' });
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// Remove the previous subtitle file if there was one.
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if (content.subtitle_url) {
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const old = path.join(config.contentDir, path.basename(content.subtitle_url));
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if (fs.existsSync(old)) { try { fs.unlinkSync(old); } catch {} }
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}
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const lang = req.body.subtitle_lang ? String(req.body.subtitle_lang).slice(0, 10) : (content.subtitle_lang || null);
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db.prepare('UPDATE content SET subtitle_url = ?, subtitle_lang = ? WHERE id = ?')
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.run(req.file.filename, lang, req.params.id);
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res.json(db.prepare('SELECT * FROM content WHERE id = ?').get(req.params.id));
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});
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// Serve content file
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router.get('/:id/file', (req, res) => {
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const content = checkContentRead(req, res);
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@ -69,6 +69,7 @@ function buildSnapshotItems(playlistId) {
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SELECT pi.id AS _iid, pi.content_id, pi.widget_id, pi.zone_id, pi.sort_order, pi.duration_sec, pi.muted,
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COALESCE(c.filename, w.name) as filename, c.mime_type, c.filepath, c.file_size,
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c.duration_sec as content_duration, c.remote_url, c.unstable_connection,
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c.captions_enabled, c.captions_lang, c.subtitle_url, c.subtitle_lang,
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w.name as widget_name, w.widget_type, w.config as widget_config
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FROM playlist_items pi
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LEFT JOIN content c ON pi.content_id = c.id
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106
server/test/content-subtitles.test.js
Normal file
106
server/test/content-subtitles.test.js
Normal file
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@ -0,0 +1,106 @@
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'use strict';
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// #216 subtitle/caption support. Two risky paths:
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// 1. the 4 new content fields reach the player via buildSnapshotItems (enumerated query).
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// 2. POST /:id/subtitle stores the .vtt and records subtitle_url + subtitle_lang.
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const os = require('node:os');
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const path = require('node:path');
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const fs = require('node:fs');
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||||
const crypto = require('node:crypto');
|
||||
const TMP = fs.mkdtempSync(path.join(os.tmpdir(), 'st-subs-'));
|
||||
process.env.DATA_DIR = TMP;
|
||||
process.env.SELF_HOSTED = 'true';
|
||||
process.env.NODE_ENV = 'test';
|
||||
|
||||
const { test, before, after } = require('node:test');
|
||||
const assert = require('node:assert/strict');
|
||||
const http = require('node:http');
|
||||
const express = require('express');
|
||||
const { db } = require('../db/database');
|
||||
const { publishPlaylist } = require('../routes/playlists');
|
||||
|
||||
const uid = (p) => p + '-' + crypto.randomBytes(4).toString('hex');
|
||||
const USER = 'u-subs';
|
||||
|
||||
let server, base;
|
||||
|
||||
before(async () => {
|
||||
fs.mkdirSync(require('../config').contentDir, { recursive: true });
|
||||
db.prepare("INSERT INTO users (id, email, password_hash, plan_id) VALUES (?, ?, 'x', 'free')").run(USER, USER + '@t.local');
|
||||
|
||||
// Platform-admin stub + platform-template content (workspace_id NULL) so checkContentWrite
|
||||
// grants access without standing up full workspace membership — this test is about the
|
||||
// subtitle endpoint mechanics, not tenancy (covered elsewhere).
|
||||
const app = express();
|
||||
app.use((req, _res, next) => { req.workspaceId = 'ws-subs'; req.user = { id: USER, role: 'platform_admin' }; next(); });
|
||||
app.use('/', require('../routes/content'));
|
||||
server = http.createServer(app);
|
||||
await new Promise((r) => server.listen(0, r));
|
||||
base = `http://127.0.0.1:${server.address().port}`;
|
||||
});
|
||||
|
||||
after(() => new Promise((r) => server.close(r)));
|
||||
|
||||
test('published snapshot carries caption + subtitle fields to the player', () => {
|
||||
const c = uid('cap');
|
||||
db.prepare(`INSERT INTO content (id, filename, mime_type, captions_enabled, captions_lang, subtitle_url, subtitle_lang)
|
||||
VALUES (?, ?, 'video/youtube', 1, 'es', 'sub.vtt', 'fr')`).run(c, c);
|
||||
const pl = uid('pl');
|
||||
db.prepare("INSERT INTO playlists (id, user_id, name, status) VALUES (?, ?, 'P', 'draft')").run(pl, USER);
|
||||
db.prepare('INSERT INTO playlist_items (playlist_id, content_id, sort_order) VALUES (?, ?, 0)').run(pl, c);
|
||||
|
||||
publishPlaylist(pl);
|
||||
const item = JSON.parse(db.prepare('SELECT published_snapshot FROM playlists WHERE id = ?').get(pl).published_snapshot)[0];
|
||||
assert.equal(item.captions_enabled, 1);
|
||||
assert.equal(item.captions_lang, 'es');
|
||||
assert.equal(item.subtitle_url, 'sub.vtt');
|
||||
assert.equal(item.subtitle_lang, 'fr');
|
||||
});
|
||||
|
||||
test('POST /:id/subtitle stores the .vtt and records url + lang', async () => {
|
||||
const c = uid('vid');
|
||||
db.prepare("INSERT INTO content (id, filename, mime_type, filepath) VALUES (?, ?, 'video/mp4', 'v.mp4')").run(c, c);
|
||||
|
||||
const boundary = '----st' + crypto.randomBytes(6).toString('hex');
|
||||
const vtt = 'WEBVTT\n\n00:00.000 --> 00:02.000\nHello\n';
|
||||
const body = Buffer.concat([
|
||||
Buffer.from(`--${boundary}\r\nContent-Disposition: form-data; name="subtitle_lang"\r\n\r\nfr\r\n`),
|
||||
Buffer.from(`--${boundary}\r\nContent-Disposition: form-data; name="subtitle"; filename="cap.vtt"\r\nContent-Type: text/vtt\r\n\r\n`),
|
||||
Buffer.from(vtt), Buffer.from(`\r\n--${boundary}--\r\n`),
|
||||
]);
|
||||
const res = await new Promise((resolve, reject) => {
|
||||
const req = http.request(`${base}/${c}/subtitle`, {
|
||||
method: 'POST',
|
||||
headers: { 'Content-Type': `multipart/form-data; boundary=${boundary}`, 'Content-Length': body.length },
|
||||
}, (r) => { let o = ''; r.on('data', (d) => (o += d)); r.on('end', () => resolve({ status: r.statusCode, json: JSON.parse(o) })); });
|
||||
req.on('error', reject);
|
||||
req.end(body);
|
||||
});
|
||||
assert.equal(res.status, 200);
|
||||
assert.match(res.json.subtitle_url, /\.vtt$/);
|
||||
assert.equal(res.json.subtitle_lang, 'fr');
|
||||
// The file physically exists in the content dir and holds the cue text.
|
||||
const onDisk = path.join(require('../config').contentDir, res.json.subtitle_url);
|
||||
assert.ok(fs.existsSync(onDisk));
|
||||
assert.match(fs.readFileSync(onDisk, 'utf8'), /WEBVTT/);
|
||||
});
|
||||
|
||||
test('a non-.vtt upload to /:id/subtitle is rejected', async () => {
|
||||
const c = uid('vid2');
|
||||
db.prepare("INSERT INTO content (id, filename, mime_type, filepath) VALUES (?, ?, 'video/mp4', 'v.mp4')").run(c, c);
|
||||
const boundary = '----st' + crypto.randomBytes(6).toString('hex');
|
||||
const body = Buffer.concat([
|
||||
Buffer.from(`--${boundary}\r\nContent-Disposition: form-data; name="subtitle"; filename="notsub.txt"\r\nContent-Type: text/plain\r\n\r\n`),
|
||||
Buffer.from('nope'), Buffer.from(`\r\n--${boundary}--\r\n`),
|
||||
]);
|
||||
const status = await new Promise((resolve, reject) => {
|
||||
const req = http.request(`${base}/${c}/subtitle`, {
|
||||
method: 'POST',
|
||||
headers: { 'Content-Type': `multipart/form-data; boundary=${boundary}`, 'Content-Length': body.length },
|
||||
}, (r) => { r.on('data', () => {}); r.on('end', () => resolve(r.statusCode)); });
|
||||
req.on('error', reject);
|
||||
req.end(body);
|
||||
});
|
||||
assert.notEqual(status, 200); // multer fileFilter rejects the .txt
|
||||
});
|
||||
Loading…
Reference in a new issue