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Fix progress bar stuck at 30% during Cloud Run synchronous processing

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Cloud Run processes PDFs synchronously (2-5 min). The await startCheck()
call blocks JS, so progress never advanced past 30%. Add a setInterval
timer before the await that advances through realistic stages every 18s,
covering the full processing window. Timer is cleared on completion/error.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Vadym Samoilenko 2026-03-12 18:19:46 +00:00
parent c4ffb94351
commit 5652b67a07
1 changed files with 25 additions and 1 deletions
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26
js/upload.js
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@ -99,9 +99,32 @@ async function beginCheck() {
const quickMode = document.getElementById('quickMode').checked;
if (quickMode) addLog('Quick mode enabled — skipping expensive checks', 'info');
// Animate progress while Cloud Run processes synchronously (can take 2-5 min)
const progressStages = [
{ pct: 35, msg: 'Loading PDF structure...', log: 'Reading PDF metadata and tagging' },
{ pct: 45, msg: 'Checking document structure...', log: 'Validating PDF tags and structure tree' },
{ pct: 55, msg: 'Analyzing images with AI...', log: 'Running AI vision analysis on images' },
{ pct: 65, msg: 'Checking color contrast...', log: 'Calculating WCAG contrast ratios' },
{ pct: 72, msg: 'Analyzing readability...', log: 'Computing Flesch reading scores' },
{ pct: 80, msg: 'Checking headings & links...', log: 'Heading hierarchy, tab order, role mapping' },
{ pct: 88, msg: 'Running PDF/UA validation...', log: 'veraPDF structure validation' },
{ pct: 94, msg: 'Compiling results...', log: 'Generating accessibility report' },
];
let stageIdx = 0;
const progressTimer = setInterval(() => {
if (stageIdx < progressStages.length) {
const s = progressStages[stageIdx++];
updateProgress(s.pct, s.msg);
addLog(s.log, 'info');
}
}, 18000); // advance every 18s → covers ~2.5 min of processing
updateProgress(30, 'Analyzing PDF (this may take a few minutes)...');
addLog('Sent to Cloud Run for processing...', 'info');
try {
updateProgress(30, 'Analyzing PDF (this may take a few minutes)...');
const result = await startCheck(currentJobId, quickMode);
clearInterval(progressTimer);
if (result.success) {
if (result.data && result.data.status === 'completed') {
@ -121,6 +144,7 @@ async function beginCheck() {
document.getElementById('progressContainer').style.display = 'none';
}
} catch (error) {
clearInterval(progressTimer);
addLog('Check error: ' + error.message, 'error');
alert('Check failed: ' + error.message);
document.getElementById('progressContainer').style.display = 'none';