1 const std = @import("std");
2 const posix = std.posix;
3 const linux = std.os.linux;
5 pub const Server = struct {
9 listener: posix.socket_t,
11 ready_list: [BACKLOG]linux.epoll_event = undefined,
13 ready_count: usize = 0,
14 ready_index: usize = 0,
16 pub fn init(name: []const u8, port: u16) !Server {
17 const address = try std.net.Address.resolveIp(name, port);
19 const tpe: u32 = posix.SOCK.STREAM | posix.SOCK.NONBLOCK;
20 const protocol = posix.IPPROTO.TCP;
21 const listener = try posix.socket(address.any.family, tpe, protocol);
23 try posix.setsockopt(listener, posix.SOL.SOCKET, posix.SO.REUSEADDR, &std.mem.toBytes(@as(c_int, 1)));
24 try posix.bind(listener, &address.any, address.getOsSockLen());
25 try posix.listen(listener, BACKLOG);
27 // epoll_create1 takes flags. We aren't using any in these examples
28 const efd = try posix.epoll_create1(0);
30 var event = linux.epoll_event{ .events = linux.EPOLL.IN, .data = .{ .fd = listener } };
31 try posix.epoll_ctl(efd, linux.EPOLL.CTL_ADD, listener, &event);
39 pub fn deinit(self: Server) void {
40 posix.close(self.efd);
41 posix.close(self.listener);
44 pub fn wait(self: *Server) void {
45 if (self.ready_index >= self.ready_count) {
47 self.ready_count = posix.epoll_wait(self.efd, &self.ready_list, -1);
51 pub fn next_request(self: *Server, buf: []u8) !?Request {
52 while (self.ready_index < self.ready_count) {
53 const ready = self.ready_list[self.ready_index];
54 const ready_socket = ready.data.fd;
55 self.ready_index += 1;
57 if (ready_socket == self.listener) {
58 const client_socket = try posix.accept(self.listener, null, null, posix.SOCK.NONBLOCK);
59 errdefer posix.close(client_socket);
60 var event = linux.epoll_event{ .events = linux.EPOLL.IN, .data = .{ .fd = client_socket } };
61 try posix.epoll_ctl(self.efd, linux.EPOLL.CTL_ADD, client_socket, &event);
64 var req = Request{ .fd = ready_socket };
66 const read = posix.read(ready_socket, buf) catch 0;
70 if (req.parse(buf[0..read]))
74 if (closed or ready.events & linux.EPOLL.RDHUP == linux.EPOLL.RDHUP) {
75 posix.close(ready_socket);
83 // pub const Method = enum { GET, POST };
84 pub const Method = std.http.Method;
86 // pub const Header = struct {
87 // const NAME_SIZE = 32;
88 // const VALUE_SIZE = 128;
90 // name: std.BoundedArray(u8, NAME_SIZE),
91 // value: std.BoundedArray(u8, VALUE_SIZE),
93 pub const Header = struct {
94 const Name = std.BoundedArray(u8, 32);
95 const Value = std.BoundedArray(u8, 128);
97 name: Name = Name.init(0) catch unreachable,
98 value: Value = Value.init(0) catch unreachable,
100 pub const Status = std.http.Status;
102 pub const Request = struct {
105 method: Method = undefined,
106 target: []const u8 = undefined,
107 version: ?[]const u8 = null,
108 head: ?[]const u8 = null,
109 body: ?[]const u8 = null,
111 pub fn parse(self: *Request, buf: []const u8) bool {
118 while (index < buf.len) {
121 const c = buf[index];
126 self.method = @enumFromInt(Method.parse(buf[start..index]));
133 self.target = buf[start..index];
140 self.version = buf[start..index];
147 if (c == '\r' and (index + 2) < buf.len and buf[index + 2] == '\r') {
148 self.head = buf[start..index];
150 if (index + 4 < buf.len) {
151 self.body = buf[index + 4 .. buf.len];
163 pub fn get_header(self: Request, name: []const u8) ?[]const u8 {
164 const head = self.head orelse return null;
165 var start: usize = 0;
166 var matching: usize = 0;
167 for (0..head.len) |i| {
170 if (matching < name.len) {
171 if (c == name[matching]) {
172 if (matching == 0) start = i;
179 return head[start..i];
186 pub fn get_cookie(self: Request, name: []const u8) ?[]const u8 {
187 const cookie = self.get_header("Cookie") orelse return null;
188 var start: usize = 0;
189 var matching: usize = 0;
190 for (0..cookie.len) |i| {
193 if (matching < name.len) {
194 if (c == name[matching]) {
195 if (matching == 0) start = i;
202 if (std.mem.indexOfScalarPos(u8, cookie, i, ';')) |semi_index| {
203 return cookie[i + 1 .. semi_index];
205 return cookie[i + 1 .. cookie.len];
215 pub fn parse1(self: *Request, buf: []const u8) bool {
216 const method_start: usize = 0;
217 const method_end = std.mem.indexOfScalar(u8, buf, ' ') orelse return false;
218 self.method = @enumFromInt(Method.parse(buf[method_start..method_end]));
220 const target_start = method_end + 1;
221 const target_end = std.mem.indexOfScalarPos(u8, buf, target_start, ' ') orelse return false;
222 self.target = buf[target_start..target_end];
224 const version_start = target_end + 1;
225 const version_end = std.mem.indexOfPos(u8, buf, version_start, "\r\n") orelse buf.len;
226 self.version = buf[version_start..version_end];
228 if (version_end + 2 >= buf.len)
230 const head_start = version_end + 2;
231 const head_end = std.mem.indexOfPos(u8, buf, head_start, "\r\n\r\n") orelse buf.len;
232 self.head = buf[head_start..head_end];
234 if (head_end + 4 >= buf.len)
236 const body_start = head_end + 4;
237 const body_end = buf.len;
238 self.body = buf[body_start..body_end];
243 pub fn get_header1(self: Request, name: []const u8) ?[]const u8 {
244 const head = self.head orelse return null;
245 const header_start = std.mem.indexOf(u8, head, name) orelse return null;
246 const header_end = std.mem.indexOfPos(u8, head, header_start, "\r\n") orelse return null;
247 return head[header_start..header_end];
250 pub fn get_cookie1(self: Request, name: []const u8) ?[]const u8 {
251 const cookie = self.get_header("Cookie") orelse return null;
252 const name_index = std.mem.indexOf(u8, cookie, name) orelse return null;
253 const eql_index = std.mem.indexOfScalarPos(u8, cookie, name_index, '=') orelse return null;
254 if (std.mem.indexOfScalarPos(u8, cookie, eql_index, ';')) |semi_index| {
255 return cookie[eql_index + 1 .. semi_index];
257 return cookie[eql_index + 1 .. cookie.len];
261 pub fn get_value(self: Request, name: []const u8) ?[]const u8 {
262 const body = self.body orelse return null;
263 const name_index = std.mem.indexOf(u8, body, name) orelse return null;
264 const eql_index = std.mem.indexOfScalarPos(u8, body, name_index, '=') orelse return null;
265 if (std.mem.indexOfScalarPos(u8, body, name_index, '&')) |amp_index| {
266 return body[eql_index + 1 .. amp_index];
268 return body[eql_index + 1 .. body.len];
273 pub const Response = struct {
274 const ExtraHeadersMax = 16;
275 const HeaderList = std.BoundedArray(Header, ExtraHeadersMax);
278 stream_head: std.io.FixedBufferStream([]u8),
279 stream_body: std.io.FixedBufferStream([]u8),
280 status: Status = .ok,
281 extra_headers: HeaderList = HeaderList.init(0) catch unreachable,
283 pub fn init(fd: posix.fd_t, buf_head: []u8, buf_body: []u8) Response {
286 .stream_head = std.io.fixedBufferStream(buf_head),
287 .stream_body = std.io.fixedBufferStream(buf_body),
291 pub fn redirect(self: *Response, location: []const u8) !void {
292 self.status = .see_other;
293 try self.add_header("Location", .{ "{s}", .{location} });
296 pub fn add_header(self: *Response, name: []const u8, value: anytype) !void {
297 const header = try self.extra_headers.addOne();
298 try header.name.writer().writeAll(name);
299 if (@typeInfo(@TypeOf(value)).Struct.fields.len < 2 or @sizeOf(@TypeOf(value[1])) == 0) {
300 try header.value.writer().writeAll(value[0]);
302 try std.fmt.format(header.value.writer(), value[0], value[1]);
306 pub fn write(self: *Response, comptime fmt: []const u8, args: anytype) !void {
307 const writer = self.stream_body.writer();
309 if (@sizeOf(@TypeOf(args)) == 0) {
310 try writer.writeAll(fmt);
312 try std.fmt.format(writer, fmt, args);
316 pub fn send(self: *Response) !void {
318 const writer = self.stream_head.writer();
320 try std.fmt.format(writer, "HTTP/1.1 {} {?s}\r\n" ++
321 "Content-Length: {}\r\n", .{ @intFromEnum(self.status), self.status.phrase(), self.stream_body.pos });
323 for (self.extra_headers.constSlice()) |header| {
324 try std.fmt.format(writer, "{s}: {s}\r\n", .{ header.name.constSlice(), header.value.constSlice() });
327 try std.fmt.format(writer, "\r\n", .{});
329 // write body to head
331 try std.fmt.format(writer, "{s}", .{self.stream_body.getWritten()});
335 const res = self.stream_head.getWritten();
336 var written: usize = 0;
337 while (written < res.len) {
338 written += posix.write(self.fd, res[written..res.len]) catch |err| {
339 std.debug.print("posix.write: {}\n", .{err});