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Set a MIME Body from Binary Bytes (BinData)

Demonstrates the Chilkat Mime.SetBodyBd method, which sets the decoded body bytes from a BinData, changes the transfer encoding to base64, and preserves the bytes exactly. The only argument is the BinData.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This is the direct way to put arbitrary binary content into a part from memory — a generated image, a decrypted blob — without a temporary file. Chilkat base64-encodes it so the bytes survive text-based transports unchanged. Note it does not set a Content-Type or disposition, so assign those yourself to describe what the bytes are.

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

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

    // Demonstrates the Mime.SetBodyBd method, which sets the decoded body bytes from a BinData,
    // changes the transfer encoding to base64, and preserves the bytes exactly.  The only argument is
    // the BinData.

    // Put the binary body bytes into a BinData.
    const bd = try chilkat.BinData.init();
    defer bd.deinit();
    bd.loadFile("qa_data/photo.jpg") catch {
        std.debug.print("{s}\n", .{try bd.getLastErrorText(alloc)});
        return;
    };

    const mime = try chilkat.Mime.init();
    defer mime.deinit();

    // Set a Content-Type for the binary content (SetBodyBd does not set one itself).
    mime.setContentType("image/jpeg");

    mime.setBodyBd(bd) catch {
        std.debug.print("{s}\n", .{try mime.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("Body set from {d} bytes.\n", .{bd.getNumBytes()});
}