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data.uribl.js
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data.uribl.js
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// Look up URLs in SURBL
var url = require('url');
var dns = require('dns');
var two_level_tlds = {};
exports.hook_data = function (next, connection) {
// enable mail body parsing
connection.transaction.parse_body = 1;
next();
}
exports.hook_data_post = function (next, connection) {
var zones = this.config.get('data.uribl.zones', 'list');
this.config.get('data.uribl.two_level_tlds', 'list').forEach(function (tld) {
two_level_tlds[tld] = 1;
});
// this.loginfo(two_level_tlds);
var urls = {};
// this.loginfo(connection.transaction.body);
extract_urls(urls, connection.transaction.body);
var hosts = Object.keys(urls);
var pending_queries = 0;
var next_ran = 0;
var plugin = this;
for (var i=0,l=hosts.length; i < l; i++) {
var host = hosts[i];
var match = host.match(/([^\.]+\.)?([^\.]+\.[^\.]+)$/);
if (match && !host.match(/^\d+\.\d+\.\d+\.\d+$/)) {
if (two_level_tlds[match[2]]) {
host = match[0];
}
else {
host = match[2];
}
}
// Now query for "host".zone
for (var i=0,l=zones.length; i < l; i++) {
pending_queries++;
this.logdebug("Looking up: " + host + '.' + zones[i]);
dns.resolveTxt(host + '.' + zones[i], function (err, addresses) {
pending_queries--;
if (!err) {
if (!next_ran) {
next_ran++;
return next(DENY, addresses);
}
}
if (pending_queries === 0) {
next();
}
});
}
}
if (pending_queries === 0) {
// we didn't execute any DNS queries
next();
}
}
var numeric_ip = /\w{3,16}:\/+(\S+@)?(\d+|0[xX][0-9A-Fa-f]+)\.(\d+|0[xX][0-9A-Fa-f]+)\.(\d+|0[xX][0-9A-Fa-f]+)\.(\d+|0[xX][0-9A-Fa-f]+)/g;
var schemeless = /((?:www\.)?[a-zA-Z0-9][a-zA-Z0-9\-.]+\.(?:aero|arpa|asia|biz|cat|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|pro|tel|travel|[a-zA-Z]{2}))(?!\w)/g;
var schemed = /(\w{3,16}:\/+(?:\S+@)?([a-zA-Z0-9][a-zA-Z0-9\-.]+\.(?:aero|arpa|asia|biz|cat|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|pro|tel|travel|[a-zA-Z]{2})))(?!\w)/g;
function extract_urls (urls, body) {
// extract from body.bodytext
var match;
// extract numeric URIs
while (match = numeric_ip.exec(body.bodytext)) {
var uri = url.parse(match[0]);
urls[uri.hostname.split(/\./).reverse().join('.')] = uri;
}
// match plain hostname.tld
while (match = schemeless.exec(body.bodytext)) {
var uri = url.parse('http://' + match[1]);
urls[uri.hostname] = uri;
}
// match http:// URI
while (match = schemed.exec(body.bodytext)) {
var uri = url.parse(match[1]);
urls[uri.hostname] = uri;
}
for (var i=0,l=body.children.length; i < l; i++) {
extract_urls(urls, body.children[i]);
}
}