Zig

Send StringBuilder Contents over a Socket

Demonstrates Socket.SendSb, which encodes the contents of a StringBuilder using StringCharset and sends the resulting bytes.

Background. Text send and receive operations encode and decode bytes using the StringCharset property. For plain ASCII or UTF-8 protocols, setting StringCharset to utf-8 is a safe default.

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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();

    const socket = try chilkat.Socket.init();
    defer socket.deinit();

    // Connect to the server using TLS.  The 3rd argument enables the TLS handshake after the TCP
    // connection succeeds; the 4th is the maximum time to wait, in milliseconds.
    const b_tls = true;
    const max_wait_ms = 5000;
    socket.connect("example.com", 5000, b_tls, max_wait_ms) catch {
        std.debug.print("{s}\n", .{try socket.getLastErrorText(alloc)});
        return;
    };

    // StringCharset controls the character encoding used when sending and receiving text.
    socket.setStringCharset("utf-8");

    // Build the text to send in a StringBuilder, then send its contents.
    const sb = try chilkat.StringBuilder.init();
    defer sb.deinit();
    sb.append("SET temperature 21\r\n") catch {};

    socket.sendSb(sb) catch {
        std.debug.print("{s}\n", .{try socket.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("Message sent.\n", .{});
}