132 lines
4.3 KiB
Zig
132 lines
4.3 KiB
Zig
const std = @import("std");
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const builtin = @import("builtin");
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const http = @import("http");
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const util = @import("util");
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const api = @import("./api.zig");
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const models = @import("./models.zig");
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const Uuid = util.Uuid;
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// this thing is overcomplicated and weird. stop this
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const Router = http.Router(*RequestServer);
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const Route = Router.Route;
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const RouteArgs = http.RouteArgs;
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const router = Router{
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.routes = &[_]Route{
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Route.new(.GET, "/healthcheck", healthcheck),
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Route.new(.GET, "/notes/:id", getNote),
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Route.new(.POST, "/notes", createNote),
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Route.new(.POST, "/users", createUser),
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},
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};
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const json_options = if (builtin.mode == .Debug)
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.{
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.whitespace = .{
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.indent = .{ .Space = 2 },
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.separator = true,
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},
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} else .{
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.whitespace = .{
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.indent = .None,
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.separator = false,
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},
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};
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// Responds to a request with a json value
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fn respondJson(ctx: *http.server.Context, status: http.Status, value: anytype, alloc: std.mem.Allocator) !void {
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var headers = http.Headers.init(alloc);
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defer headers.deinit();
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// Don't need to free this k/v pair because they aren't dynamically allocated
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try headers.put("Content-Type", "application/json");
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var stream = try ctx.openResponse(&headers, status);
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defer stream.close();
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const writer = stream.writer();
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try std.json.stringify(value, json_options, writer);
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try stream.finish();
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}
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fn parseRequestBody(comptime T: type, ctx: *http.server.Context, alloc: std.mem.Allocator) !T {
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const body = ctx.request.body orelse return error.BodyRequired;
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var tokens = std.json.TokenStream.init(body);
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const parsed = try std.json.parse(T, &tokens, .{ .allocator = alloc });
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return parsed;
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}
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fn freeRequestBody(value: anytype, alloc: std.mem.Allocator) void {
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std.json.parseFree(@TypeOf(value), value, .{ .allocator = alloc });
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}
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fn createNote(srv: *RequestServer, ctx: *http.server.Context, _: RouteArgs) !void {
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const info = try parseRequestBody(api.CreateInfo(models.Note), ctx, srv.alloc);
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defer freeRequestBody(info, srv.alloc);
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const note = try srv.api.createNote(info);
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try respondJson(ctx, .created, note, srv.alloc);
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}
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fn createUser(srv: *RequestServer, ctx: *http.server.Context, _: RouteArgs) !void {
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const info = try parseRequestBody(api.CreateInfo(models.User), ctx, srv.alloc);
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defer freeRequestBody(info, srv.alloc);
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const user = try srv.api.createUser(info);
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try respondJson(ctx, .created, user, srv.alloc);
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}
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fn getNote(srv: *RequestServer, ctx: *http.server.Context, args: RouteArgs) !void {
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const id_str = args.get("id") orelse return error.NotFound;
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const id = Uuid.parse(id_str) catch return respondJson(ctx, .bad_request, .{ .@"error" = "Invalid UUID" }, srv.alloc);
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const note = (try srv.api.getNote(id, srv.alloc)) orelse return respondJson(ctx, .not_found, .{ .@"error" = "Note not found" }, srv.alloc);
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defer api.free(srv.alloc, note);
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try respondJson(ctx, .ok, note, srv.alloc);
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}
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fn healthcheck(srv: *RequestServer, ctx: *http.server.Context, _: RouteArgs) !void {
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try respondJson(ctx, .ok, .{ .status = "ok" }, srv.alloc);
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}
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const RequestServer = struct {
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alloc: std.mem.Allocator,
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api: api.ApiServer,
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fn init(alloc: std.mem.Allocator) !RequestServer {
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return RequestServer{
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.alloc = alloc,
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.api = try api.ApiServer.init(alloc),
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};
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}
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fn listenAndRun(self: *RequestServer, addr: std.net.Address) noreturn {
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var srv = http.Server.listen(addr) catch unreachable;
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defer srv.shutdown();
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while (true) {
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var buf: [1 << 20]u8 = undefined;
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var fba = std.heap.FixedBufferAllocator.init(&buf);
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const alloc = fba.allocator();
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var ctx = srv.accept(alloc) catch unreachable;
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defer ctx.close();
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router.dispatch(self, &ctx, ctx.request.method, ctx.request.path) catch |err| switch (err) {
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error.NotFound, error.RouteNotApplicable => respondJson(&ctx, .not_found, .{ .@"error" = "Not Found" }, alloc) catch unreachable,
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else => unreachable,
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};
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}
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}
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};
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pub fn main() anyerror!void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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var srv = try RequestServer.init(gpa.allocator());
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srv.listenAndRun(std.net.Address.parseIp("0.0.0.0", 8080) catch unreachable);
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}
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