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Enpoint example: from singleton to @fieldParentPtr

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This commit is contained in:
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 User = Users.User;
// the Endpoint
// an Endpoint
pub const Self = @This();
var alloc: std.mem.Allocator = undefined;
var endpoint: zap.SimpleEndpoint = undefined;
var users: Users = undefined;
alloc: std.mem.Allocator = undefined,
endpoint: zap.SimpleEndpoint = undefined,
users: Users = undefined,
pub fn init(
a: std.mem.Allocator,
user_path: []const u8,
) void {
users = Users.init(a);
alloc = a;
endpoint = zap.SimpleEndpoint.init(.{
) Self {
return .{
.alloc = a,
.users = Users.init(a),
.endpoint = zap.SimpleEndpoint.init(.{
.path = user_path,
.get = getUser,
.post = postUser,
.put = putUser,
.delete = deleteUser,
});
}),
};
}
pub fn getUsers() *Users {
return &users;
pub fn getUsers(self: *Self) *Users {
return &self.users;
}
pub fn getUserEndpoint() *zap.SimpleEndpoint {
return &endpoint;
pub fn getUserEndpoint(self: *Self) *zap.SimpleEndpoint {
return &self.endpoint;
}
fn userIdFromPath(path: []const u8) ?usize {
if (path.len >= endpoint.settings.path.len + 2) {
if (path[endpoint.settings.path.len] != '/') {
fn userIdFromPath(self: *Self, path: []const u8) ?usize {
if (path.len >= self.endpoint.settings.path.len + 2) {
if (path[self.endpoint.settings.path.len] != '/') {
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 null;
}
fn getUser(e: *zap.SimpleEndpoint, r: zap.SimpleRequest) void {
const self = @fieldParentPtr(Self, "endpoint", e);
if (r.path) |path| {
// /users
if (path.len == e.settings.path.len) {
return listUsers(e, r);
return self.listUsers(r);
}
var jsonbuf: [256]u8 = undefined;
if (userIdFromPath(path)) |id| {
if (users.get(id)) |user| {
if (self.userIdFromPath(path)) |id| {
if (self.users.get(id)) |user| {
if (zap.stringifyBuf(&jsonbuf, user, .{})) |json| {
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 {
_ = e;
if (users.toJSON()) |json| {
defer alloc.free(json);
fn listUsers(self: *Self, r: zap.SimpleRequest) void {
if (self.users.toJSON()) |json| {
defer self.alloc.free(json);
r.sendJson(json) catch return;
} else |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 {
_ = e;
const self = @fieldParentPtr(Self, "endpoint", e);
if (r.body) |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| {
defer std.json.parseFree(User, u, .{ .allocator = alloc });
if (users.addByName(u.first_name, u.last_name)) |id| {
defer std.json.parseFree(User, u, .{ .allocator = self.alloc });
if (self.users.addByName(u.first_name, u.last_name)) |id| {
var jsonbuf: [128]u8 = undefined;
if (zap.stringifyBuf(&jsonbuf, .{ .status = "OK", .id = id }, .{})) |json| {
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 {
_ = e;
const self = @fieldParentPtr(Self, "endpoint", e);
if (r.path) |path| {
if (userIdFromPath(path)) |id| {
if (users.get(id)) |_| {
if (self.userIdFromPath(path)) |id| {
if (self.users.get(id)) |_| {
if (r.body) |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| {
defer std.json.parseFree(User, u, .{ .allocator = alloc });
defer std.json.parseFree(User, u, .{ .allocator = self.alloc });
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| {
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 {
_ = e;
const self = @fieldParentPtr(Self, "endpoint", e);
if (r.path) |path| {
if (userIdFromPath(path)) |id| {
if (self.userIdFromPath(path)) |id| {
var jsonbuf: [128]u8 = undefined;
if (users.delete(id)) {
if (self.users.delete(id)) {
if (zap.stringifyBuf(&jsonbuf, .{ .status = "OK", .id = id }, .{})) |json| {
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
try listener.addEndpoint(Endpoint.getUserEndpoint());
try listener.addEndpoint(endpoint.getUserEndpoint());
// fake some users
var uid: usize = undefined;
uid = try Endpoint.getUsers().addByName("renerocksai", null);
uid = try Endpoint.getUsers().addByName("renerocksai", "your mom");
uid = try endpoint.getUsers().addByName("renerocksai", null);
uid = try endpoint.getUsers().addByName("renerocksai", "your mom");
// listen
try listener.listen();