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);
62 var addr: std.c.sockaddr = undefined;
63 var addr_size: std.c.socklen_t = @sizeOf(std.c.sockaddr);
64 _ = std.c.getpeername(client_socket, &addr, &addr_size);
65 std.debug.print("new connection from {}\n", .{addr});
68 var req = Request{ .fd = ready_socket };
72 const newly_read = posix.read(ready_socket, buf[read..]) catch 0;
80 if (req.parse(buf[0..read]))
84 if (closed or ready.events & linux.EPOLL.RDHUP == linux.EPOLL.RDHUP) {
85 posix.close(ready_socket);
93 // pub const Method = enum { GET, POST };
94 pub const Method = std.http.Method;
96 // pub const Header = struct {
97 // const NAME_SIZE = 32;
98 // const VALUE_SIZE = 128;
100 // name: std.BoundedArray(u8, NAME_SIZE),
101 // value: std.BoundedArray(u8, VALUE_SIZE),
103 pub const Header = struct {
104 const Name = std.BoundedArray(u8, 32);
105 const Value = std.BoundedArray(u8, 128);
107 name: Name = Name.init(0) catch unreachable,
108 value: Value = Value.init(0) catch unreachable,
110 pub const Status = std.http.Status;
112 pub const Request = struct {
115 method: Method = undefined,
116 target: []const u8 = undefined,
117 query: ?[]const u8 = null,
118 version: ?[]const u8 = null,
119 head: ?[]const u8 = null,
122 pub fn parse(self: *Request, buf: []u8) bool {
123 // std.debug.print("buf: {s}\n", .{buf});
129 while (index < buf.len) {
132 const c = buf[index];
137 self.method = @enumFromInt(Method.parse(buf[start..index]));
144 self.target = buf[start..index];
147 } else if (c == ' ') {
148 self.target = buf[start..index];
155 self.query = buf[start..index];
162 self.version = buf[start..index];
169 if (c == '\r' and (index + 2) < buf.len and buf[index + 2] == '\r') {
170 self.head = buf[start .. index + 2];
172 if (index + 4 < buf.len) {
173 self.body = buf[index + 4 .. buf.len];
185 pub fn get_cookie(self: Request, name: []const u8) ?[]const u8 {
186 const cookie = self.get_header("Cookie") orelse return null;
187 var start: usize = 0;
188 var matching: usize = 0;
189 for (0..cookie.len) |i| {
192 if (matching < name.len) {
193 if (c == name[matching]) {
194 if (matching == 0) start = i;
201 if (std.mem.indexOfScalarPos(u8, cookie, i, ';')) |semi_index| {
202 return cookie[i + 1 .. semi_index];
204 return cookie[i + 1 .. cookie.len];
214 pub fn get_header(self: Request, name: []const u8) ?[]const u8 {
215 const head = self.head orelse return null;
216 const header_start = std.mem.indexOf(u8, head, name) orelse return null;
217 const colon_index = std.mem.indexOfPos(u8, head, header_start, ": ") orelse return null;
218 const header_end = std.mem.indexOfPos(u8, head, colon_index, "\r\n") orelse return null;
219 return head[colon_index + 2 .. header_end];
222 pub fn get_param(self: Request, name: []const u8) ?[]const u8 {
223 const query = self.query orelse return null;
224 const name_index = std.mem.indexOf(u8, query, name) orelse return null;
225 const eql_index = std.mem.indexOfScalarPos(u8, query, name_index, '=') orelse return null;
226 if (std.mem.indexOfScalarPos(u8, query, name_index, '&')) |amp_index| {
227 const result = query[eql_index + 1 .. amp_index];
230 const result = query[eql_index + 1 .. query.len];
235 pub fn get_value(self: Request, name: []const u8) ?[]const u8 {
236 const body = self.body orelse return null;
237 const name_index = std.mem.indexOf(u8, body, name) orelse return null;
238 const eql_index = std.mem.indexOfScalarPos(u8, body, name_index, '=') orelse return null;
239 if (std.mem.indexOfScalarPos(u8, body, name_index, '&')) |amp_index| {
240 const result = body[eql_index + 1 .. amp_index];
243 const result = body[eql_index + 1 .. body.len];
248 pub fn get_cookie1(self: Request, name: []const u8) ?[]const u8 {
249 const cookie = self.get_header("Cookie") orelse return null;
250 const name_index = std.mem.indexOf(u8, cookie, name) orelse return null;
251 const eql_index = std.mem.indexOfScalarPos(u8, cookie, name_index, '=') orelse return null;
252 if (std.mem.indexOfScalarPos(u8, cookie, eql_index, ';')) |semi_index| {
253 return cookie[eql_index + 1 .. semi_index];
255 return cookie[eql_index + 1 .. cookie.len];
258 pub fn get_header1(self: Request, name: []const u8) ?[]const u8 {
259 const head = self.head orelse return null;
260 var start: usize = 0;
261 var matching: usize = 0;
262 for (0..head.len) |i| {
265 if (matching < name.len) {
266 if (c == name[matching]) {
267 // if (matching == 0) start = i;
275 return head[start..i];
282 pub fn parse1(self: *Request, buf: []const u8) bool {
283 const method_start: usize = 0;
284 const method_end = std.mem.indexOfScalar(u8, buf, ' ') orelse return false;
285 self.method = @enumFromInt(Method.parse(buf[method_start..method_end]));
287 const target_start = method_end + 1;
288 const target_end = std.mem.indexOfScalarPos(u8, buf, target_start, ' ') orelse return false;
289 self.target = buf[target_start..target_end];
291 const version_start = target_end + 1;
292 const version_end = std.mem.indexOfPos(u8, buf, version_start, "\r\n") orelse buf.len;
293 self.version = buf[version_start..version_end];
295 if (version_end + 2 >= buf.len)
297 const head_start = version_end + 2;
298 const head_end = std.mem.indexOfPos(u8, buf, head_start, "\r\n\r\n") orelse buf.len;
299 self.head = buf[head_start..head_end];
301 if (head_end + 4 >= buf.len)
303 const body_start = head_end + 4;
304 const body_end = buf.len;
305 self.body = buf[body_start..body_end];
311 pub const Response = struct {
312 const ExtraHeadersMax = 16;
313 const HeaderList = std.BoundedArray(Header, ExtraHeadersMax);
316 stream_head: std.io.FixedBufferStream([]u8),
317 stream_body: std.io.FixedBufferStream([]u8),
318 status: Status = .ok,
319 extra_headers: HeaderList = HeaderList.init(0) catch unreachable,
321 pub fn init(req: Request, buf_head: []u8, buf_body: []u8) Response {
324 .stream_head = std.io.fixedBufferStream(buf_head),
325 .stream_body = std.io.fixedBufferStream(buf_body),
329 pub fn redirect(self: *Response, location: []const u8) !void {
330 self.status = .see_other;
331 try self.add_header("Location", .{ "{s}", .{location} });
334 /// value can be a "string" or a struct .{ "fmt", .{ args }}
335 pub fn add_header(self: *Response, name: []const u8, value: anytype) !void {
336 const header = try self.extra_headers.addOne();
337 try header.name.writer().writeAll(name);
338 if (@typeInfo(@TypeOf(value)).Struct.fields.len < 2 or @sizeOf(@TypeOf(value[1])) == 0) {
339 try header.value.writer().writeAll(value[0]);
341 try std.fmt.format(header.value.writer(), value[0], value[1]);
345 pub fn has_header(self: Response, name: []const u8) bool {
346 for (self.extra_headers.constSlice()) |h| {
347 if (std.mem.eql(u8, h.name.constSlice(), name)) {
354 pub fn write(self: *Response, comptime fmt: []const u8, args: anytype) !void {
355 const writer = self.stream_body.writer();
357 if (@sizeOf(@TypeOf(args)) == 0) {
358 try writer.writeAll(fmt);
360 try std.fmt.format(writer, fmt, args);
364 pub fn send(self: *Response) !void {
366 const compress = false;
367 var compress_buffer = try std.BoundedArray(u8, 1024 * 32).init(0);
370 const writer = self.stream_head.writer();
373 var cfbs = std.io.fixedBufferStream(self.stream_body.getWritten());
374 var compressor = try std.compress.gzip.compressor(compress_buffer.writer(), .{ .level = .default });
375 try compressor.compress(cfbs.reader());
376 // try compressor.flush();
377 try compressor.finish();
378 try std.fmt.format(writer, "HTTP/1.1 {} {?s}\r\n" ++
379 "Content-Length: {}\r\n" ++
380 "Content-Encoding: gzip\r\n", .{ @intFromEnum(self.status), self.status.phrase(), compress_buffer.constSlice().len });
382 try std.fmt.format(writer, "HTTP/1.1 {} {?s}\r\n" ++
383 "Content-Length: {}\r\n", .{ @intFromEnum(self.status), self.status.phrase(), self.stream_body.pos });
386 for (self.extra_headers.constSlice()) |header| {
387 try std.fmt.format(writer, "{s}: {s}\r\n", .{ header.name.constSlice(), header.value.constSlice() });
390 try std.fmt.format(writer, "\r\n", .{});
392 // write body to head
394 try std.fmt.format(writer, "{s}", .{compress_buffer.constSlice()});
396 try std.fmt.format(writer, "{s}", .{self.stream_body.getWritten()});
400 const res = self.stream_head.getWritten();
401 var written: usize = 0;
402 while (written < res.len) {
403 written += posix.write(self.req.fd, res[written..res.len]) catch |err| {
404 std.debug.print("posix.write: {}\n", .{err});