facilmap/frontend/gulpfile-img64.js

50 wiersze
1.3 KiB
JavaScript

var cheerio = require("cheerio");
var through = require('through2');
var mime = require('mime');
var path = require('path');
var fs = require('fs');
var gutil = require('gulp-util');
function replacePath(ssrc, file) {
var isdata = ssrc.indexOf("data");
if (ssrc != "" && typeof ssrc != 'undefined' && isdata !== 0) {
var spath = path.isAbsolute(ssrc) ? path.join(file.base, ssrc) : path.resolve(path.dirname(file.path), ssrc);
var mtype = mime.lookup(spath);
if (mtype != 'application/octet-stream') {
var sfile = fs.readFileSync(spath);
var simg64 = new Buffer(sfile).toString('base64');
return 'data:' + mtype + ';base64,' + simg64;
}
}
}
module.exports = function() {
return through.obj(function(file, enc, callback) {
if (file.isNull()) {
this.push(file);
// do nothing if no contents
return callback();
}
if (file.isStream()) {
this.emit('error', new gutil.PluginError('gulp-img64', 'Streaming not supported'));
return callback();
}
if (file.isBuffer()) {
var $ = cheerio.load(String(file.contents));
$('img').each(function() {
$(this).attr('src', replacePath($(this).attr('src'), file));
});
$('link[rel~=icon]').each(function() {
$(this).attr('href', replacePath($(this).attr('href'), file));
});
file.contents = new Buffer($.html());
return callback(null, file);
}
});
};