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Added PDF service

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This commit is contained in:
benweet 2014-08-13 22:06:14 +01:00
parent ae2c687524
commit ae8adddf5d
8 changed files with 131 additions and 49 deletions
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9
app/.jshintrc Normal file
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@ -0,0 +1,9 @@
{
"curly": true,
"node": true,
"indent": 4,
"latedef": true,
"undef": true,
"unused": true,
"expr": true
}

38
app/index.js Normal file
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@ -0,0 +1,38 @@
var express = require('express');
var app = express();
// Configure ejs engine
app.set('views', __dirname + '/../public');
app.engine('html', require('ejs').renderFile);
// Force HTTPS on stackedit.io
app.all('*', function(req, res, next) {
if (req.headers.host == 'stackedit.io' && req.headers['x-forwarded-proto'] != 'https') {
res.redirect('https://stackedit.io' + req.url);
}
else {
/\.(eot|ttf|woff)$/.test(req.url) && res.header('Access-Control-Allow-Origin', '*');
next();
}
});
// Use gzip compression
app.use(express.compress());
// Serve static resources
app.use(express.static(__dirname + '/../public'));
// Serve viewer.html in /viewer
app.get('/viewer', function (req, res) {
res.render('viewer.html');
});
app.post('/pdf', require('./pdf'));
// Error 404
app.use(function(req, res, next) {
res.status(404);
res.render('error_404.html');
});
module.exports = app;

75
app/pdf.js Normal file
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@ -0,0 +1,75 @@
var spawn = require('child_process').spawn;
var fs = require('fs');
var authorizedPageSizes = [
'A3',
'A4',
'Legal',
'Letter'
];
module.exports = function(req, res, next) {
var options, params = [];
try {
options = JSON.parse(req.query.options);
}
catch(e) {
options = {};
}
// Margins
var marginRight = parseInt(options.marginRight);
params.push('-R', isNaN(marginRight) ? 25 : marginRight);
var marginTop = parseInt(options.marginTop);
params.push('-T', isNaN(marginTop) ? 25 : marginTop);
var marginBottom = parseInt(options.marginBottom);
params.push('-B', isNaN(marginBottom) ? 25 : marginBottom);
var marginLeft = parseInt(options.marginLeft);
params.push('-L', isNaN(marginLeft) ? 25 : marginLeft);
// Header
options.headerCenter && params.push('--header-center', options.headerCenter);
options.headerLeft && params.push('--header-left', options.headerLeft);
options.headerRight && params.push('--header-left', options.headerRight);
options.headerFontName && params.push('--header-font-name ', options.headerFontName);
options.headerFontSize && params.push('--header-font-size ', options.headerFontSize);
// Footer
options.footerCenter && params.push('--footer-center', options.footerCenter);
options.footerLeft && params.push('--footer-left', options.footerLeft);
options.footerRight && params.push('--footer-left', options.footerRight);
options.footerFontName && params.push('--footer-font-name ', options.footerFontName);
options.footerFontSize && params.push('--footer-font-size ', options.footerFontSize);
// Page size
var pageSize = options.pageSize;
params.push('--page-size', authorizedPageSizes.indexOf(pageSize) === -1 ? 'A4' : pageSize);
// wkhtmltopdf can't access /dev/stdout on Amazon EC2 for some reason
var filePath = '/tmp/' + Date.now() + '.pdf';
var wkhtmltopdf = spawn('wkhtmltopdf', params.concat('--javascript-delay', '6000', '-', filePath), {
stdio: [
'pipe',
'ignore',
'ignore'
]
});
function onError(err) {
next(err);
}
wkhtmltopdf.on('error', onError);
wkhtmltopdf.stdin.on('error', onError);
wkhtmltopdf.on('close', function(code) {
if(code) {
res.statusCode = 400;
return res.end('Unknown error');
}
var readStream = fs.createReadStream(filePath);
readStream.on('close', function() {
fs.unlink(filePath, function() {
});
});
readStream.pipe(res);
});
req.pipe(wkhtmltopdf.stdin);
};

2
public/res/constants.js
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@ -26,7 +26,7 @@ define([], function() {
constants.DOWNLOAD_PROXY_URL = "https://stackedit-download-proxy.herokuapp.com/";
constants.PICASA_PROXY_URL = "https://stackedit-picasa-proxy.herokuapp.com/";
constants.SSH_PROXY_URL = "https://stackedit-ssh-proxy.herokuapp.com/";
constants.HTMLTOPDF_URL = "https://stackedit-htmltopdf.herokuapp.com/";
constants.HTMLTOPDF_URL = "/pdf";
// Site dependent
constants.BASE_URL = "http://localhost/";

1
public/res/publisher.js
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@ -348,7 +348,6 @@ define([
var xhr = new XMLHttpRequest();
xhr.open('POST', constants.HTMLTOPDF_URL, true);
xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
xhr.setRequestHeader('page-size', settings.pdfPageSize);
xhr.responseType = 'blob';
xhr.onreadystatechange = function() {
if(this.readyState == 4) {

15
public/res/styles/base.less
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@ -218,6 +218,10 @@ hr {
margin: 2em 0;
}
img {
max-width: 100%;
}
.sequence-diagram, .flow-chart {
text-align: center;
margin-bottom: @p-margin;
@ -468,14 +472,3 @@ body.rtl {
direction: rtl;
}
}
/*******************
* PDF
*******************/
body.pdf {
font-family: "DejaVu Sans";
code, pre {
font-family: "DejaVu Sans Mono";
}
}

3
public/res/styles/main.less
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@ -1558,9 +1558,10 @@ div.jGrowl {
-ms-filter: none;
filter: none;
border-radius: 4px;
font-family: @font-family-base;
}
div.jGrowl-notification {
min-height: 60px;
min-height: 65px;
}
}

35
server.js
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@ -1,37 +1,4 @@
var express = require('express');
var app = express();
// Configure ejs engine
app.set('views', __dirname + '/public');
app.engine('html', require('ejs').renderFile);
// Force HTTPS on stackedit.io
app.all('*', function(req, res, next) {
if (req.headers.host == 'stackedit.io' && req.headers['x-forwarded-proto'] != 'https') {
res.redirect('https://stackedit.io' + req.url);
}
else {
/\.(eot|ttf|woff)$/.test(req.url) && res.header('Access-Control-Allow-Origin', '*');
next();
}
});
// Use gzip compression
app.use(express.compress());
// Serve static resources
app.use(express.static(__dirname + '/public'));
// Serve viewer.html in /viewer
app.get('/viewer', function (req, res) {
res.render('viewer.html');
});
// Error 404
app.use(function(req, res, next) {
res.status(404);
res.render('error_404.html');
});
var app = require('./app');
// Listen on port 3000
var port = process.env.PORT || 3000;