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server.js
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server.js
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'use strict';
var crypto = require('crypto')
, connect = require('connect')
, statik = require('serve-static')
, query = require('connect-query')
, http = require('http')
, path = require('path')
, process = require('./process-image').process
;
module.exports.create = function (config) {
config = config || {};
var imagesFolder = config.imagesFolder || path.resolve(__dirname, 'images', 'resized')
, originalsFolder = config.originalsFolder || path.resolve(__dirname, 'images', 'originals')
, imagesRoute = config.imagesRoute || '/images'
, apiRoute = config.apiRoute || '/api'
//, limit = config.limit || 255 * (1024) // 255kb
, app = connect()
;
function resize(req, res, next) {
/*
function redirect(fname) {
var address = (config.href) + imagesRoute + '/' + fname
;
res.writeHead(301, { Location: address });
res.write(301 + ' ' + http.STATUS_CODES[301] + ' ' + address + '\n');
res.end();
}
*/
function status(code) {
res.statusCode = code;
// why are we responding with JSON when the client is expecting images and
// probably has no way of parsing this JSON?
res.end(JSON.stringify({
error: {
message: '' + code + ' ' + http.STATUS_CODES[code]
}
}));
}
var url = req.query.url
, crop = req.query.crop || ''
, targetFormat = (req.query.format || '').toLowerCase()
, quality = (req.query.quality || null)
, width = parseInt(req.query.width || req.query.w || 0, 10)
, height = parseInt(req.query.height || req.query.h || 0, 10)
, refresh = parseInt(req.query.refresh || 0, 10)
, state = req.query.state || ''
, id = url
+ (state||'')
+ (width||'')
+ (height||'')
+ (crop||'')
+ (targetFormat||'')
+ (quality||'')
, hash = crypto.createHash('md5').update(id).digest('hex')
, origsum = crypto.createHash('md5').update(url + (state||'')).digest('hex')
, match = url.match(/\.(jpe?g|png|ico|gif|tiff?|jf?if)(?=[^.]*$)/i)
, conf
, opts
;
if (!url) {
status(422);
return;
}
// security check
if (/\.\./.test(url)) {
console.error('[resize-as-a-servize] attack? ' + url);
next(); // TODO: fix this behavior
return;
}
if (isNaN(width) || isNaN(height)) {
status(422);
return;
}
if (!match) {
status(415);
return;
}
if ('bmp' === targetFormat) {
status(422);
return;
}
conf = {
imagesFolder: imagesFolder
, originalsFolder: originalsFolder
};
opts = {
width: width
, height: height
//, crop: crop
, originalFilename: origsum
, targetBaseName: hash
, targetFormat: targetFormat
, quality: quality
, refresh: refresh
, state: state
};
return process(conf, url, opts).then(function (data) {
// TODO use different routes
req.originalUrl = imagesRoute + '/' + data.filename;
req.url = '/' + imagesRoute + '/' + data.filename;
next();
return;
}).error(function (err) {
console.error('[e] resize 1');
console.error(err);
status(500);
throw err;
});
}
app
.use(query())
.use(apiRoute, resize)
// resized
.use(apiRoute + imagesRoute, statik(imagesFolder))
.use(imagesRoute, statik(imagesFolder))
// originals
.use(apiRoute + imagesRoute, statik(originalsFolder))
.use(imagesRoute, statik(originalsFolder))
;
return app;
};