Zig

Unobfuscate a Spammy Email

Demonstrates the Chilkat Email.UnSpamify method, which unobfuscates an email by undoing common spammer tricks — it removes comments from HTML bodies and unobfuscates hyperlinked URLs. This example cleans an HTML body whose link was broken up by an inserted comment.

Background: Spammers deliberately scramble HTML to slip past filters — inserting empty comments in the middle of words or URLs (example.com), or otherwise obfuscating links — so the message renders normally to a human but confuses naive keyword matching. UnSpamify reverses those tricks, producing a normalized body that is easier to analyze, classify, or scan for the real destination of its links.

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Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // Demonstrates the UnSpamify method, which unobfuscates an email by undoing common spammer
    // tricks: it removes comments from HTML bodies and unobfuscates hyperlinked URLs.

    const email = try chilkat.Email.init();
    defer email.deinit();
    email.setSubject("UnSpamify example");

    // An HTML body with an obfuscating comment inserted into a hyperlink.
    email.setHtmlBody("<html><body>Visit <a href=\"http://exa<!--x-->mple.com\">our site</a>.</body></html>");

    // Undo the obfuscation.
    email.unSpamify();

    const cleaned = try email.getHtmlBody(alloc);
    std.debug.print("{s}\n", .{cleaned});
}