xsheetjs/demos/server/express.js

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/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
var fs = require('fs'), path = require('path'), URL = require('url');
var express = require('express'), app = express();
var sprintf = require('printj').sprintf;
var logit = require('./_logit');
var cors = require('./_cors');
var data = "a,b,c\n1,2,3".split("\n").map(function(x) { return x.split(","); });
var XLSX = require('xlsx');
/* helper to generate the workbook object */
function make_book() {
var ws = XLSX.utils.aoa_to_sheet(data);
var wb = XLSX.utils.book_new();
XLSX.utils.book_append_sheet(wb, ws, "SheetJS");
return wb;
}
function get_data(req, res, type) {
var wb = make_book();
/* send buffer back */
res.status(200).send(XLSX.write(wb, {type:'buffer', bookType:type}));
}
function get_file(req, res, file) {
var wb = make_book();
/* write using XLSX.writeFile */
XLSX.writeFile(wb, file);
res.status(200).send("wrote to " + file + "\n");
}
function load_data(file) {
var wb = XLSX.readFile(file);
/* generate array of arrays */
data = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]], {header:1});
console.log(data);
}
function post_data(req, res) {
var keys = Object.keys(req.files), k = keys[0];
load_data(req.files[k].path);
res.status(200).send("ok\n");
}
function post_file(req, res, file) {
load_data(file);
res.status(200).send("ok\n");
}
app.use(logit.mw);
app.use(cors.mw);
app.use(require('express-formidable')());
app.get('/', function(req, res, next) {
var url = URL.parse(req.url, true);
if(url.query.t) return get_data(req, res, url.query.t);
else if(url.query.f) return get_file(req, res, url.query.f);
res.status(403).end("Forbidden");
});
app.post('/', function(req, res, next) {
var url = URL.parse(req.url, true);
if(url.query.f) return post_file(req, res, url.query.f);
return post_data(req, res);
});
var port = +process.argv[2] || +process.env.PORT || 7262;
app.listen(port, function() { console.log('Serving HTTP on port ' + port); });