TL;DR Regarding user input and queries: Make sure to always use the active record query methods (such as .where), and avoid passing parameters using string interpolation; pass them as hash parameter values, or as parameterized statements. Regarding rendering potentially unsafe user-generated html / javascript content: As of Rails 3, html/javascript text is automatically properly escaped … Read more
You can try OWASP Java HTML Sanitizer. It is very simple to use. PolicyFactory policy = new HtmlPolicyBuilder() .allowElements(“a”) .allowUrlProtocols(“https”) .allowAttributes(“href”).onElements(“a”) .requireRelNofollowOnLinks() .build(); String safeHTML = policy.sanitize(untrustedHTML);
For most of the framework, you can use sanitize node module: npm install sanitize –save And then can use like: var sanitizer = require(‘sanitize’)(); var name = sanitizer.value(req.name, ‘string’); var surname= sanitizer.value(req.surname, ‘string’); For more can go through sanitize documentation If you are using express, then you can validate and sanitize using express-validator and express-sanitize-input … Read more
The proper way to sanitize data for insertion into your database is to use placeholders for all variables to be inserted into your SQL strings. In other words, NEVER do this: my $sql = “INSERT INTO foo (bar, baz) VALUES ( $bar, $baz )”; Instead, use ? placeholders: my $sql = “INSERT INTO foo (bar, … Read more
Just use filter_input_array() from the filter extension. /* prevent XSS. */ $_GET = filter_input_array(INPUT_GET, FILTER_SANITIZE_STRING); $_POST = filter_input_array(INPUT_POST, FILTER_SANITIZE_STRING); This will sanitize your $_GET and $_POST.
You can just use: ActiveRecord::Base::sanitize_sql(string)
As dj_segfault points out, the shell can do most of this for you. Looks like you’ll have to fall back on something external for lower-casing the string, though. For this you have many options, like the perl one-liners above, etc., but I think tr is probably the simplest. # first, strip underscores CLEAN=${STRING//_/} # next, … Read more
According to PHP Manual: Strip tags, optionally strip or encode special characters. According to W3Schools: The FILTER_SANITIZE_STRING filter strips or encodes unwanted characters. This filter removes data that is potentially harmful for your application. It is used to strip tags and remove or encode unwanted characters. Now, that doesn’t tell us much. Let’s go see … Read more
This filter had an unclear purpose. It’s difficult to say what exactly it was meant to accomplish or when it should be used. It was also confused with the default string filter, due to its name, when in reality the default string filter is called FILTER_UNSAFE_RAW. The PHP community decided that the usage of this … Read more
Unfortunately, almost no one of the participants ever clearly understands what are they talking about. Literally. Only Kibbee managed to make it straight. This topic is all about sanitization. But the truth is, such a thing like wide-termed “general purpose sanitization” everyone is so eager to talk about is just doesn’t exist. There are a … Read more