46 lines
1.4 KiB
JavaScript
46 lines
1.4 KiB
JavaScript
/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
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/* eslint-env node */
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// base64 sheetjs.xlsb | curl -F "data=@-;filename=test.xlsb" http://localhost:7262/api/AzureHTTPTrigger
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const XLSX = require('xlsx');
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const formidable = require('formidable');
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const Readable = require('stream').Readable;
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var fs = require('fs');
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/* formidable expects the request object to be a stream */
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const streamify = (req) => {
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if(typeof req.on !== 'undefined') return req;
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const s = new Readable();
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s._read = ()=>{};
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s.push(new Buffer(req.body));
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s.push(null);
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Object.assign(s, req);
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return s;
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};
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module.exports = (context, req) => {
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const form = new formidable.IncomingForm();
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form.parse(streamify(req), (err, fields, files) => {
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/* grab the first file */
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var f = Object.values(files)[0];
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if(!f) {
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context.res = { status: 400, body: "Must submit a file for processing!" };
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} else {
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/* since the file is Base64-encoded, read the file and parse as "base64" */
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const b64 = fs.readFileSync(f.path).toString();
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const wb = XLSX.read(b64, {type:"base64"});
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/* convert to specified output type -- default CSV */
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const ext = (fields.bookType || "csv").toLowerCase();
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const out = XLSX.write(wb, {type:"string", bookType:ext});
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context.res = {
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status: 200,
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headers: { "Content-Disposition": `attachment; filename="download.${ext}";` },
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body: out
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};
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}
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context.done();
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});
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};
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