实战：Zig 编写高性能 Web 服务（2）

1.1 编写 HTTP server

我们从python -m http.server 8000启动得到灵感，先确定好目标：

• 编写一个HTTP/1.1 http server
• zig version 0.12.0

使用zig init搭建项目的前置工作你先自行搭建好，不会的翻看前面铺垫的章节熟悉zig的项目结构。

关键文件build.zig:

const std = @import("std");

// Although this function looks imperative, note that its job is to
// declaratively construct a build graph that will be executed by an external
// runner.
pub fn build(b: *std.Build) void {
    // Standard target options allows the person running `zig build` to choose
    // what target to build for. Here we do not override the defaults, which
    // means any target is allowed, and the default is native. Other options
    // for restricting supported target set are available.
    const target = b.standardTargetOptions(.{});

    // Standard optimization options allow the person running `zig build` to select
    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not
    // set a preferred release mode, allowing the user to decide how to optimize.
    const optimize = b.standardOptimizeOption(.{});

    const exe = b.addExecutable(.{
        .name = "zig-http-server",
        .root_source_file = .{ .path = "src/main.zig" },
        .target = target,
        .optimize = optimize,
        // .use_llvm = false,
        // .use_lld = false,
    });

    const xev = b.dependency("libxev", .{ .target = target, .optimize = optimize });
    exe.root_module.addImport("xev", xev.module("xev"));

    // This declares intent for the executable to be installed into the
    // standard location when the user invokes the "install" step (the default
    // step when running `zig build`).
    b.installArtifact(exe);

    // This *creates* a Run step in the build graph, to be executed when another
    // step is evaluated that depends on it. The next line below will establish
    // such a dependency.
    const run_cmd = b.addRunArtifact(exe);

    // By making the run step depend on the install step, it will be run from the
    // installation directory rather than directly from within the cache directory.
    // This is not necessary, however, if the application depends on other installed
    // files, this ensures they will be present and in the expected location.
    run_cmd.step.dependOn(b.getInstallStep());

    // This allows the user to pass arguments to the application in the build
    // command itself, like this: `zig build run -- arg1 arg2 etc`
    if (b.args) |args| {
        run_cmd.addArgs(args);
    }

    // This creates a build step. It will be visible in the `zig build --help` menu,
    // and can be selected like this: `zig build run`
    // This will evaluate the `run` step rather than the default, which is "install".
    const run_step = b.step("run", "Run the app");
    run_step.dependOn(&run_cmd.step);
}

build.zig.zon文件：

.{
    .name = "zig-http-server",
    .version = "0.0.0",
    .dependencies = .{
        .libxev = .{
            .url = "https://codeload.github.com/mitchellh/libxev/tar.gz/b3f9918776b8700b337b7ebe76906032