Zig

Set a Multipart Part Body from a StringBuilder

Demonstrates Rest.SetMultipartBodySb, which sets the text body of the selected multipart part from a StringBuilder.

Background. A multipart request is assembled part by part: the part selector chooses the part being built, header fields describe it, and a SetMultipartBody method supplies its content. The request is then sent with a multipart send or full-request method.

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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();

    const rest = try chilkat.Rest.init();
    defer rest.deinit();
    const b_tls = true;
    const b_auto_reconnect = true;
    rest.connect("example.com", 443, b_tls, b_auto_reconnect) catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    // Select the multipart part to build, and set its header fields.
    rest.setPartSelector("1");
    rest.addHeader("Content-Disposition", "form-data; name=\"field1\"") catch {};
    rest.addHeader("Content-Type", "application/json") catch {};

    // Set the text body of the selected part from a StringBuilder.
    const sb_body = try chilkat.StringBuilder.init();
    defer sb_body.deinit();
    sb_body.append("{ \"key\": \"value\" }") catch {};
    rest.setMultipartBodySb(sb_body) catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    const response_text = rest.fullRequestMultipart(alloc, "POST", "/api/upload") catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("{s}\n", .{response_text});
}