52 lines
1.7 KiB
JavaScript
52 lines
1.7 KiB
JavaScript
const fs = require("fs");
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const PSTExtractor = require("pst-extractor");
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const XLSX = require("xlsx");
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/* walk the PST file and add all attachments to the specified array */
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function walk(f,arr) {
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if(f.hasSubfolders) for(let sf of f.getSubFolders()) walk(sf,arr);
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if(f.contentCount <= 0) return;
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for(let e = f.getNextChild(); e != null; e = f.getNextChild()) {
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for(let i = 0; i < e.numberOfAttachments; ++i) {
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var a = e.getAttachment(i);
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/* XLS spreadsheet test by filename */
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if(/.xls[xmb]?$/.test(a.filename)) arr.push(a);
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}
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}
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}
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/* collect data from the attachment into a "Buffer" */
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function collect(file) {
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const strm = file.fileInputStream;
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const data = Buffer.alloc(strm._length.low);
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strm.readCompletely(data);
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return data;
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}
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(async() => {
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/* fetch https://docs.sheetjs.com/pst/enron.pst */
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const ab = await (await fetch("https://docs.sheetjs.com/pst/enron.pst")).arrayBuffer();
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const pst = new (PSTExtractor.PSTFile)(Buffer.from(ab));
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/* generate a list of attachments */
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const files = [];
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walk(pst.getRootFolder(), files);
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files.forEach((file, idx) => {
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/* extract and save workbook to file */
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const ext = file.filename.slice(file.filename.lastIndexOf(".") + 1);
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console.log(`saving file ${idx} |${file.filename}| to file${idx}.${ext}`);
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const buf = collect(file);
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fs.writeFileSync(`file${idx}.${ext}`, buf);
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/* parse workbook and print CSV contents of each sheet */
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const wb = XLSX.read(buf);
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wb.SheetNames.forEach(n => {
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const ws = wb.Sheets[n];
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const csv = XLSX.utils.sheet_to_csv(ws);
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console.log(`#### ${file.filename} ! ${n}`);
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console.log(csv);
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});
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});
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})();
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