Unicode C

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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Unicode C

#include <C_CkEmailW.h>

void ChilkatSample(void)
    {
    HCkEmailW email;
    const wchar_t *cleaned;

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

    email = CkEmailW_Create();
    CkEmailW_putSubject(email,L"UnSpamify example");

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

    //  Undo the obfuscation.
    CkEmailW_UnSpamify(email);

    cleaned = CkEmailW_getHtmlBody(email);
    wprintf(L"%s\n",cleaned);


    CkEmailW_Dispose(email);

    }