httptest.zig

const olin = @import("./olin/olin.zig");
const log = olin.log;
const resource = olin.resource;

const assert = @import("std").debug.assert;
const mem = @import("std").mem;
const fmt = @import("std").fmt;
const heap = @import("std").heap;
const Headers = @import("std").http.Headers;

const userAgent = "Olin+Zig@master";

export fn cwa_main() i32 {
    log.info("making request to http://127.0.0.1:3000/foo.txt");

    doRequest(heap.wasm_allocator) catch return 1;

    return 0;
}

fn doRequest(alloc: *mem.Allocator) !void {
    const fout = try resource.open("http://127.0.0.1:3000");
    var buf: []u8 = undefined;
    buf = try alloc.alloc(u8, 256);
    defer alloc.free(buf);
    var h = Headers.init(alloc);
    defer h.deinit();
    try h.append("User-Agent", userAgent, null);
    try h.append("Host", "127.0.0.1:3000", null);

    var res = try fmt.bufPrint(buf[0..], "GET /foo.txt HTTP/1.1\n{}\n\n", h);
    const n = try fout.write(res.ptr, res.len);
    log.info(res);

    try fout.flush();

    var resp: []u8 = undefined;
    resp = try alloc.alloc(u8, 2048);
    defer alloc.free(resp);

    const nresp = try fout.read(resp.ptr, resp.len);
    log.info(resp[0..nresp]);
}

output.txt

unoptimized build

httptest.wasm: 2019/10/12 11:27:37 info: making request to http://127.0.0.1:3000/foo.txt
httptest.wasm: 2019/10/12 11:27:37 info: GET /foo.txt HTTP/1.1
User-Agent: Olin+Zig@master
Host: 127.0.0.1:3000


2019/10/12 11:27:37 http://127.0.0.1:3000: 207 bytes waiting in resp
httptest.wasm: 2019/10/12 11:27:37 info: HTTP/1.1 200 OK
Content-Length: 22
Accept-Ranges: bytes
Content-Type: text/plain; charset=utf-8
Date: Sat, 12 Oct 2019 15:27:37 GMT
Last-Modified: Sat, 12 Oct 2019 14:50:12 GMT

Hello this is a test!
2019/10/12 11:27:37 reading file time: 176.21µs
2019/10/12 11:27:37 vm init time:      42.639344ms
2019/10/12 11:27:37 vm gas limit:      4194304
2019/10/12 11:27:37 vm gas used:       294649
2019/10/12 11:27:37 vm gas percentage: 7.024979591369629
2019/10/12 11:27:37 vm syscalls:       7
2019/10/12 11:27:37 execution time:    49.13221ms
2019/10/12 11:27:37 memory pages:      3

optimized build (--release-fast)

httptest.wasm: 2019/10/12 11:28:54 info: making request to http://127.0.0.1:3000/foo.txt
httptest.wasm: 2019/10/12 11:28:54 info: GET /foo.txt HTTP/1.1
User-Agent: Olin+Zig@master
Host: 127.0.0.1:3000


2019/10/12 11:28:54 http://127.0.0.1:3000: 207 bytes waiting in resp
httptest.wasm: 2019/10/12 11:28:54 info: HTTP/1.1 200 OK
Content-Length: 22
Accept-Ranges: bytes
Content-Type: text/plain; charset=utf-8
Date: Sat, 12 Oct 2019 15:28:54 GMT
Last-Modified: Sat, 12 Oct 2019 14:50:12 GMT

Hello this is a test!
2019/10/12 11:28:54 reading file time: 123.688µs
2019/10/12 11:28:54 vm init time:      10.769802ms
2019/10/12 11:28:54 vm gas limit:      4194304
2019/10/12 11:28:54 vm gas used:       59120
2019/10/12 11:28:54 vm gas percentage: 1.4095306396484375
2019/10/12 11:28:54 vm syscalls:       7
2019/10/12 11:28:54 execution time:    13.301229ms
2019/10/12 11:28:54 memory pages:      3