Zig

Get Delivery-Status Info as JSON

Demonstrates the Chilkat Email.GetDsnInfo method, which — when IsMultipartReport indicates the email is a multipart/report — obtains the delivery-status information as a JsonObject. This example loads a bounce message, confirms it is a report, and prints the extracted DSN details as JSON.

Background: A bounce (DSN) carries its key facts — which recipient failed, the status code, the reporting server — in a machine-readable message/delivery-status part. Rather than parsing those raw fields yourself, GetDsnInfo gathers them into a structured JSON document you can query with the JsonObject API, making it easy to automate bounce handling and prune failed addresses from a mailing list.

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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 GetDsnInfo method, which, for a multipart/report email, obtains the
    // delivery-status information as a JSON object.

    const email = try chilkat.Email.init();
    defer email.deinit();

    email.loadEml("qa_data/eml/dsn_bounce.eml") catch {
        std.debug.print("{s}\n", .{try email.getLastErrorText(alloc)});
        return;
    };

    // Only meaningful for a multipart/report email.
    if (email.isMultipartReport()) {
        const json = try chilkat.JsonObject.init();
        defer json.deinit();
        if (email.getDsnInfo(json)) {
            std.debug.print("{s}\n", .{try json.emit(alloc)});
        } else |_| {}
    } else {
        std.debug.print("This email is not a multipart/report.\n", .{});
    }

    // Note: The path "qa_data/..." is a relative local filesystem path,
    // relative to the current working directory of the running application.
}