Zig

Strip Path Info from Attachment Filenames

Demonstrates the Chilkat Email.RemoveAttachmentPaths method, which removes relative or absolute path information from the attachment filenames stored in the MIME, leaving only each final filename component. This example adds an attachment whose name includes a path and shows the filename before and after.

Background: An attachment filename that carries a path (like reports/2026/q3/summary.txt) is a problem: some mail clients display the whole path, and — more seriously — a path with .. segments can be a directory-traversal risk when attachments are saved to disk. Reducing every filename to just its final component (summary.txt) makes the message cleaner and safer to handle.

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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 RemoveAttachmentPaths method, which removes relative or absolute path
    // information from attachment filenames stored in the MIME, leaving only each final
    // filename component.

    const email = try chilkat.Email.init();
    defer email.deinit();
    email.setSubject("Remove attachment paths");

    // Add an attachment whose filename includes path information.
    email.addStringAttachment("reports/2026/q3/summary.txt", "Attachment content.") catch {};
    std.debug.print("Filename before: {s}\n", .{try email.getAttachmentFilename(alloc, 0)});

    // Strip the path, leaving only the final filename component.
    email.removeAttachmentPaths();
    std.debug.print("Filename after: {s}\n", .{try email.getAttachmentFilename(alloc, 0)});
}