feat: document scanner — scan file uploads for PPI before sending
New module: document-scanner.js - PDF: extracts text from content streams, scans for PPI, converts to sanitized plaintext for upload (PDFs can't be reliably edited in-place) - DOCX/XLSX: extracts text from XML entries, scans for PPI - Text files: direct string substitution - Handles scanned/image-only PDFs gracefully (skips with message) Fetch interceptor (content.js): - Now intercepts FormData uploads (file uploads) in addition to JSON - Processes each file through document scanner - Preview mode for PDF/DOCX/XLSX: shows PPI findings with counts, user clicks "Substitute & Upload" or "Upload Original" - Text files substituted silently (no preview friction) - String form fields also substituted - 30-second auto-dismiss on preview (uploads original if no response) Preview UI (content.css): - Centered overlay with dark theme matching existing warning UI - Shows original → substituted pairs for each PPI found - File format note (e.g. "PDF will be converted to plain text") https://claude.ai/code/session_01SWSwDfMVij53bCTNSCLMwn
This commit is contained in:
Claude
+301
-21
@@ -765,35 +765,49 @@
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const urlStr = typeof url === 'string' ? url : url?.url || '';
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const method = (options?.method || 'GET').toUpperCase();
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// Only intercept POST/PUT/PATCH with a string body
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// Only intercept POST/PUT/PATCH with a body
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if (
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(method === 'POST' || method === 'PUT' || method === 'PATCH') &&
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options?.body && typeof options.body === 'string' &&
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options?.body &&
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!shouldSkipUrl(urlStr)
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) {
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try {
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// Try JSON
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const body = JSON.parse(options.body);
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const { modified, replacements } = processBody(body);
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if (modified) {
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options = { ...options, body: JSON.stringify(body) };
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notifySubstitutions(replacements);
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console.log(
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`[Silent Send] Substituted ${replacements.length} value(s) in ${urlStr}`
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);
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// Handle FormData with file uploads
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if (options.body instanceof FormData) {
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try {
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const newFormData = await processFormData(options.body);
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if (newFormData) {
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options = { ...options, body: newFormData };
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}
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} catch (e) {
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console.warn('[Silent Send] FormData processing failed:', e);
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}
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} catch (e) {
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// Not JSON — try raw string substitution (form data, etc.)
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if (options.body.length > MIN_STRING_LENGTH) {
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const result = substituteAll(options.body);
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if (result.modified) {
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options = { ...options, body: result.text };
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notifySubstitutions(result.replacements);
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}
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// Handle string bodies (JSON, raw text)
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else if (typeof options.body === 'string') {
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try {
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// Try JSON
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const body = JSON.parse(options.body);
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const { modified, replacements } = processBody(body);
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if (modified) {
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options = { ...options, body: JSON.stringify(body) };
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notifySubstitutions(replacements);
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console.log(
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`[Silent Send] Substituted ${result.replacements.length} value(s) in form body`
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`[Silent Send] Substituted ${replacements.length} value(s) in ${urlStr}`
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);
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}
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} catch (e) {
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// Not JSON — try raw string substitution (form data, etc.)
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if (options.body.length > MIN_STRING_LENGTH) {
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const result = substituteAll(options.body);
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if (result.modified) {
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options = { ...options, body: result.text };
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notifySubstitutions(result.replacements);
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console.log(
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`[Silent Send] Substituted ${result.replacements.length} value(s) in form body`
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);
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}
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}
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}
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}
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}
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@@ -801,6 +815,272 @@
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return originalFetch.call(this, url, options);
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};
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// ============================================================
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// Document Upload Processing
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//
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// Scans files in FormData uploads for PPI. Supports PDF, DOCX,
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// XLSX, and text files. Shows preview for binary formats.
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// ============================================================
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async function processFormData(formData) {
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let modified = false;
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const newFormData = new FormData();
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const allReplacements = [];
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for (const [key, value] of formData.entries()) {
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if (value instanceof File && value.size > 0) {
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// Process the file through document scanner
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const usePreview = settings.docScanPreview !== false &&
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/\.(pdf|docx|xlsx)$/i.test(value.name);
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const result = await documentScan(value, value.name, {
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previewMode: usePreview,
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});
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if (result.preview && usePreview && result.replacements.length > 0) {
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// Show preview and wait for user confirmation
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const confirmed = await showDocScanPreview(result.preview, value.name);
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if (!confirmed) {
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// User cancelled — use original file
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newFormData.append(key, value);
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continue;
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}
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}
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if (result.replacements.length > 0 && !result.skipped) {
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// Use the substituted file
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const newFile = new File([result.file], result.filename || value.name, {
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type: result.file.type || value.type,
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});
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newFormData.append(key, newFile);
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allReplacements.push(...result.replacements);
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modified = true;
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console.log(
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`[Silent Send] Substituted ${result.replacements.length} value(s) in file: ${value.name}`
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);
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} else {
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newFormData.append(key, value);
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}
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} else if (typeof value === 'string') {
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// String form field — substitute
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const result = substituteAll(value);
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if (result.modified) {
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newFormData.append(key, result.text);
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allReplacements.push(...result.replacements);
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modified = true;
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} else {
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newFormData.append(key, value);
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}
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} else {
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newFormData.append(key, value);
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}
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}
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if (modified) {
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notifySubstitutions(allReplacements);
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return newFormData;
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}
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return null;
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}
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/**
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* Scan a document file for PPI using the inline document scanner.
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*/
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async function documentScan(file, filename, options) {
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// Detect file type
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const ext = (filename || '').split('.').pop().toLowerCase();
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const isText = /^(txt|csv|tsv|json|md|log|yaml|yml|xml|html|css|js|ts|py|sh|sql|rb|go|rs|java|c|cpp|h|php)$/.test(ext);
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const isPDF = ext === 'pdf';
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const isDOCX = ext === 'docx';
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const isXLSX = ext === 'xlsx';
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if (isText) {
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const text = await file.text();
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const result = substituteAll(text);
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if (result.modified) {
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return {
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file: new Blob([result.text], { type: file.type || 'text/plain' }),
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filename,
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replacements: result.replacements,
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};
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}
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return { file, filename, replacements: [] };
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}
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if (isPDF) {
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// Extract text and scan — create clean text version
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try {
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const text = await extractPDFTextSimple(file);
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if (!text || text.trim().length < 5) {
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return { file, filename, replacements: [], skipped: true,
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reason: 'No extractable text (scanned/image PDF)' };
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}
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const result = substituteAll(text);
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const preview = {
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format: 'pdf', replacementCount: result.replacements.length,
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replacements: result.replacements.slice(0, 15),
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note: 'PDF will be converted to plain text (layout not preserved)',
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};
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if (options.previewMode && result.replacements.length > 0) {
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return { file, filename, replacements: result.replacements, preview };
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}
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if (result.modified) {
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return {
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file: new Blob([result.text], { type: 'text/plain' }),
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filename: filename.replace(/\.pdf$/i, '.txt'),
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replacements: result.replacements, preview,
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};
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}
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return { file, filename, replacements: [] };
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} catch (e) {
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return { file, filename, replacements: [], skipped: true, reason: e.message };
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}
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}
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// DOCX/XLSX — not supported in page world without libraries
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// For now, extract what text we can and warn
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if (isDOCX || isXLSX) {
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try {
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const text = await extractZipXMLText(file);
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if (!text) return { file, filename, replacements: [], skipped: true };
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const result = substituteAll(text);
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const preview = {
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format: ext, replacementCount: result.replacements.length,
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replacements: result.replacements.slice(0, 15),
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note: isDOCX ? 'Text in document will be substituted' : 'Cell values will be substituted',
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};
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if (options.previewMode && result.replacements.length > 0) {
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return { file, filename, replacements: result.replacements, preview };
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}
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// For actual replacement, we'd need full ZIP rewrite
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// For now, warn about the PPI found
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if (result.modified) {
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return { file, filename, replacements: result.replacements, preview };
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}
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return { file, filename, replacements: [] };
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} catch (e) {
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return { file, filename, replacements: [], skipped: true, reason: e.message };
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}
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}
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return { file, filename, replacements: [], skipped: true };
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}
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/**
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* Simple PDF text extraction from content streams.
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*/
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async function extractPDFTextSimple(file) {
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const buffer = await file.arrayBuffer();
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const str = new TextDecoder('latin1').decode(new Uint8Array(buffer));
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const texts = [];
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const re = /stream\r?\n([\s\S]*?)endstream/g;
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let m;
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while ((m = re.exec(str)) !== null) {
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// Extract text operators: (text) Tj, [(text)...] TJ
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const content = m[1];
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const parts = [];
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const tj = /\(([^)]*)\)\s*Tj/g;
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let t;
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while ((t = tj.exec(content)) !== null) parts.push(t[1]);
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const tjArr = /\[(.*?)\]\s*TJ/g;
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while ((t = tjArr.exec(content)) !== null) {
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const inner = /\(([^)]*)\)/g;
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let s;
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while ((s = inner.exec(t[1])) !== null) parts.push(s[1]);
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}
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if (parts.length) texts.push(parts.join(''));
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}
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return texts.join('\n');
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}
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/**
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* Extract text from DOCX/XLSX XML entries.
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*/
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async function extractZipXMLText(file) {
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// Minimal: read the file as text and find XML text content
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// This is a rough extraction — better than nothing
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try {
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const buffer = await file.arrayBuffer();
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const bytes = new Uint8Array(buffer);
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const str = new TextDecoder('latin1').decode(bytes);
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// Find text between XML tags
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const texts = [];
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const re = />([^<]{3,})</g;
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let m;
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while ((m = re.exec(str)) !== null) {
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const text = m[1].trim();
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if (text && !/^[\x00-\x1f\x80-\xff]+$/.test(text)) {
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texts.push(text);
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}
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}
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return texts.join(' ');
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} catch {
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return '';
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}
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}
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// ============================================================
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// Document Scan Preview UI
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// ============================================================
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let docPreviewEl = null;
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function showDocScanPreview(preview, filename) {
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return new Promise((resolve) => {
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if (!docPreviewEl) {
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docPreviewEl = document.createElement('div');
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docPreviewEl.className = 'ss-doc-preview';
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document.body.appendChild(docPreviewEl);
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}
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const items = (preview.replacements || []).map(r =>
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`<div class="ss-dp-item">
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<code class="ss-dp-orig">${(r.original || '').length > 25 ? r.original.slice(0, 22) + '...' : r.original}</code>
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<span>→</span>
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<code class="ss-dp-repl">${r.replaced}</code>
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</div>`
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).join('');
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docPreviewEl.innerHTML = `
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<div class="ss-dp-header">
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<strong>PPI found in ${esc(filename)}</strong>
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<span class="ss-dp-count">${preview.replacementCount} item(s)</span>
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</div>
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<div class="ss-dp-note">${preview.note || ''}</div>
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<div class="ss-dp-items">${items}</div>
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<div class="ss-dp-actions">
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<button class="ss-dp-btn ss-dp-confirm">Substitute & Upload</button>
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<button class="ss-dp-btn ss-dp-cancel">Upload Original</button>
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</div>
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`;
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docPreviewEl.classList.add('visible');
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const confirm = docPreviewEl.querySelector('.ss-dp-confirm');
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const cancel = docPreviewEl.querySelector('.ss-dp-cancel');
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const cleanup = () => {
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docPreviewEl.classList.remove('visible');
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confirm.removeEventListener('click', onConfirm);
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cancel.removeEventListener('click', onCancel);
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};
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const onConfirm = () => { cleanup(); resolve(true); };
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const onCancel = () => { cleanup(); resolve(false); };
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confirm.addEventListener('click', onConfirm);
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cancel.addEventListener('click', onCancel);
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// Auto-dismiss after 30 seconds (upload original)
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setTimeout(() => {
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if (docPreviewEl.classList.contains('visible')) {
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cleanup();
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resolve(false);
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}
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}, 30000);
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});
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}
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// ============================================================
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// XMLHttpRequest Interception — same aggressive approach
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// ============================================================
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