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Enpoint example: from singleton to @fieldParentPtr

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Rene Schallner 2023-04-18 21:02:43 +02:00
parent 9a9decbdd4
commit dfaadf3140
2 changed files with 48 additions and 47 deletions
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77
examples/endpoint/endpoint.zig
View file

@ -3,57 +3,60 @@ const zap = @import("zap");
const Users = @import("users.zig"); const Users = @import("users.zig");
const User = Users.User; const User = Users.User;
// the Endpoint // an Endpoint
pub const Self = @This(); pub const Self = @This();
var alloc: std.mem.Allocator = undefined; alloc: std.mem.Allocator = undefined,
var endpoint: zap.SimpleEndpoint = undefined; endpoint: zap.SimpleEndpoint = undefined,
var users: Users = undefined; users: Users = undefined,
pub fn init( pub fn init(
a: std.mem.Allocator, a: std.mem.Allocator,
user_path: []const u8, user_path: []const u8,
) void { ) Self {
users = Users.init(a); return .{
alloc = a; .alloc = a,
endpoint = zap.SimpleEndpoint.init(.{ .users = Users.init(a),
.endpoint = zap.SimpleEndpoint.init(.{
.path = user_path, .path = user_path,
.get = getUser, .get = getUser,
.post = postUser, .post = postUser,
.put = putUser, .put = putUser,
.delete = deleteUser, .delete = deleteUser,
}); }),
};
} }
pub fn getUsers() *Users { pub fn getUsers(self: *Self) *Users {
return &users; return &self.users;
} }
pub fn getUserEndpoint() *zap.SimpleEndpoint { pub fn getUserEndpoint(self: *Self) *zap.SimpleEndpoint {
return &endpoint; return &self.endpoint;
} }
fn userIdFromPath(path: []const u8) ?usize { fn userIdFromPath(self: *Self, path: []const u8) ?usize {
if (path.len >= endpoint.settings.path.len + 2) { if (path.len >= self.endpoint.settings.path.len + 2) {
if (path[endpoint.settings.path.len] != '/') { if (path[self.endpoint.settings.path.len] != '/') {
return null; return null;
} }
const idstr = path[endpoint.settings.path.len + 1 ..]; const idstr = path[self.endpoint.settings.path.len + 1 ..];
return std.fmt.parseUnsigned(usize, idstr, 10) catch null; return std.fmt.parseUnsigned(usize, idstr, 10) catch null;
} }
return null; return null;
} }
fn getUser(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void { fn getUser(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void {
const self = @fieldParentPtr(Self, "endpoint", e);
if (r.path) |path| { if (r.path) |path| {
// /users // /users
if (path.len == e.settings.path.len) { if (path.len == e.settings.path.len) {
return listUsers(e, r); return self.listUsers(r);
} }
var jsonbuf: [256]u8 = undefined; var jsonbuf: [256]u8 = undefined;
if (userIdFromPath(path)) |id| { if (self.userIdFromPath(path)) |id| {
if (users.get(id)) |user| { if (self.users.get(id)) |user| {
if (zap.stringifyBuf(&jsonbuf, user, .{})) |json| { if (zap.stringifyBuf(&jsonbuf, user, .{})) |json| {
r.sendJson(json) catch return; r.sendJson(json) catch return;
} }
@ -62,11 +65,9 @@ fn getUser(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void {
} }
} }
fn listUsers(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void { fn listUsers(self: *Self, r: zap.SimpleRequest) void {
_ = e; if (self.users.toJSON()) |json| {
defer self.alloc.free(json);
if (users.toJSON()) |json| {
defer alloc.free(json);
r.sendJson(json) catch return; r.sendJson(json) catch return;
} else |err| { } else |err| {
std.debug.print("LIST error: {}\n", .{err}); std.debug.print("LIST error: {}\n", .{err});
@ -74,13 +75,13 @@ fn listUsers(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void {
} }
fn postUser(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void { fn postUser(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void {
_ = e; const self = @fieldParentPtr(Self, "endpoint", e);
if (r.body) |body| { if (r.body) |body| {
var stream = std.json.TokenStream.init(body); var stream = std.json.TokenStream.init(body);
var maybe_user: ?User = std.json.parse(User, &stream, .{ .allocator = alloc }) catch null; var maybe_user: ?User = std.json.parse(User, &stream, .{ .allocator = self.alloc }) catch null;
if (maybe_user) |u| { if (maybe_user) |u| {
defer std.json.parseFree(User, u, .{ .allocator = alloc }); defer std.json.parseFree(User, u, .{ .allocator = self.alloc });
if (users.addByName(u.first_name, u.last_name)) |id| { if (self.users.addByName(u.first_name, u.last_name)) |id| {
var jsonbuf: [128]u8 = undefined; var jsonbuf: [128]u8 = undefined;
if (zap.stringifyBuf(&jsonbuf, .{ .status = "OK", .id = id }, .{})) |json| { if (zap.stringifyBuf(&jsonbuf, .{ .status = "OK", .id = id }, .{})) |json| {
r.sendJson(json) catch return; r.sendJson(json) catch return;
@ -94,17 +95,17 @@ fn postUser(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void {
} }
fn putUser(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void { fn putUser(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void {
_ = e; const self = @fieldParentPtr(Self, "endpoint", e);
if (r.path) |path| { if (r.path) |path| {
if (userIdFromPath(path)) |id| { if (self.userIdFromPath(path)) |id| {
if (users.get(id)) |_| { if (self.users.get(id)) |_| {
if (r.body) |body| { if (r.body) |body| {
var stream = std.json.TokenStream.init(body); var stream = std.json.TokenStream.init(body);
var maybe_user: ?User = std.json.parse(User, &stream, .{ .allocator = alloc }) catch null; var maybe_user: ?User = std.json.parse(User, &stream, .{ .allocator = self.alloc }) catch null;
if (maybe_user) |u| { if (maybe_user) |u| {
defer std.json.parseFree(User, u, .{ .allocator = alloc }); defer std.json.parseFree(User, u, .{ .allocator = self.alloc });
var jsonbuf: [128]u8 = undefined; var jsonbuf: [128]u8 = undefined;
if (users.update(id, u.first_name, u.last_name)) { if (self.users.update(id, u.first_name, u.last_name)) {
if (zap.stringifyBuf(&jsonbuf, .{ .status = "OK", .id = id }, .{})) |json| { if (zap.stringifyBuf(&jsonbuf, .{ .status = "OK", .id = id }, .{})) |json| {
r.sendJson(json) catch return; r.sendJson(json) catch return;
} }
@ -121,11 +122,11 @@ fn putUser(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void {
} }
fn deleteUser(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void { fn deleteUser(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void {
_ = e; const self = @fieldParentPtr(Self, "endpoint", e);
if (r.path) |path| { if (r.path) |path| {
if (userIdFromPath(path)) |id| { if (self.userIdFromPath(path)) |id| {
var jsonbuf: [128]u8 = undefined; var jsonbuf: [128]u8 = undefined;
if (users.delete(id)) { if (self.users.delete(id)) {
if (zap.stringifyBuf(&jsonbuf, .{ .status = "OK", .id = id }, .{})) |json| { if (zap.stringifyBuf(&jsonbuf, .{ .status = "OK", .id = id }, .{})) |json| {
r.sendJson(json) catch return; r.sendJson(json) catch return;
} }

8
examples/endpoint/main.zig
View file

@ -21,15 +21,15 @@ pub fn main() !void {
}, },
); );
Endpoint.init(allocator, "/users"); var endpoint = Endpoint.init(allocator, "/users");
// add endpoint // add endpoint
try listener.addEndpoint(Endpoint.getUserEndpoint()); try listener.addEndpoint(endpoint.getUserEndpoint());
// fake some users // fake some users
var uid: usize = undefined; var uid: usize = undefined;
uid = try Endpoint.getUsers().addByName("renerocksai", null); uid = try endpoint.getUsers().addByName("renerocksai", null);
uid = try Endpoint.getUsers().addByName("renerocksai", "your mom"); uid = try endpoint.getUsers().addByName("renerocksai", "your mom");
// listen // listen
try listener.listen(); try listener.listen();