--- /dev/null
+const std = @import("std");
+const posix = std.posix;
+const linux = std.os.linux;
+
+pub const Server = struct {
+ // TODO: factor out
+ const BACKLOG = 2048;
+
+ listener: posix.socket_t,
+ efd: i32,
+ ready_list: [BACKLOG]linux.epoll_event = undefined,
+
+ ready_count: usize = 0,
+ ready_index: usize = 0,
+
+ pub fn init(name: []const u8, port: u16) !Server {
+ const address = try std.net.Address.resolveIp(name, port);
+
+ const tpe: u32 = posix.SOCK.STREAM | posix.SOCK.NONBLOCK;
+ const protocol = posix.IPPROTO.TCP;
+ const listener = try posix.socket(address.any.family, tpe, protocol);
+
+ try posix.setsockopt(listener, posix.SOL.SOCKET, posix.SO.REUSEADDR, &std.mem.toBytes(@as(c_int, 1)));
+ try posix.bind(listener, &address.any, address.getOsSockLen());
+ try posix.listen(listener, BACKLOG);
+
+ // epoll_create1 takes flags. We aren't using any in these examples
+ const efd = try posix.epoll_create1(0);
+
+ var event = linux.epoll_event{ .events = linux.EPOLL.IN, .data = .{ .fd = listener } };
+ try posix.epoll_ctl(efd, linux.EPOLL.CTL_ADD, listener, &event);
+
+ return .{
+ .listener = listener,
+ .efd = efd,
+ };
+ }
+
+ pub fn deinit(self: Server) void {
+ posix.close(self.efd);
+ posix.close(self.listener);
+ }
+
+ pub fn wait(self: *Server) void {
+ if (self.ready_index >= self.ready_count) {
+ self.ready_index = 0;
+ self.ready_count = posix.epoll_wait(self.efd, &self.ready_list, -1);
+ }
+ }
+
+ pub fn next_request(self: *Server, buf: []u8) !?Request {
+ while (self.ready_index < self.ready_count) {
+ const ready = self.ready_list[self.ready_index];
+ const ready_socket = ready.data.fd;
+ self.ready_index += 1;
+
+ if (ready_socket == self.listener) {
+ const client_socket = try posix.accept(self.listener, null, null, posix.SOCK.NONBLOCK);
+ errdefer posix.close(client_socket);
+ var event = linux.epoll_event{ .events = linux.EPOLL.IN, .data = .{ .fd = client_socket } };
+ try posix.epoll_ctl(self.efd, linux.EPOLL.CTL_ADD, client_socket, &event);
+ } else {
+ var closed = false;
+ var req = Request{ .fd = ready_socket };
+
+ const read = posix.read(ready_socket, buf) catch 0;
+ if (read == 0) {
+ closed = true;
+ } else {
+ if (req.parse(buf[0..read]))
+ return req;
+ }
+
+ if (closed or ready.events & linux.EPOLL.RDHUP == linux.EPOLL.RDHUP) {
+ posix.close(ready_socket);
+ }
+ }
+ }
+ return null;
+ }
+};
+
+// pub const Method = enum { GET, POST };
+pub const Method = std.http.Method;
+
+// pub const Header = struct {
+// const NAME_SIZE = 32;
+// const VALUE_SIZE = 128;
+
+// name: std.BoundedArray(u8, NAME_SIZE),
+// value: std.BoundedArray(u8, VALUE_SIZE),
+// };
+pub const Header = struct {
+ const Name = std.BoundedArray(u8, 32);
+ const Value = std.BoundedArray(u8, 128);
+
+ name: Name = Name.init(0) catch unreachable,
+ value: Value = Value.init(0) catch unreachable,
+};
+pub const Status = std.http.Status;
+
+pub const Request = struct {
+ fd: posix.fd_t,
+
+ method: Method = undefined,
+ target: []const u8 = undefined,
+ version: ?[]const u8 = null,
+ head: ?[]const u8 = null,
+ body: ?[]const u8 = null,
+
+ pub fn parse(self: *Request, buf: []const u8) bool {
+ var state: u8 = 0;
+
+ var start: u32 = 0;
+ // var end: u32 = 0;
+
+ var index: u32 = 0;
+ while (index < buf.len) {
+ defer index += 1;
+
+ const c = buf[index];
+
+ switch (state) {
+ 0 => {
+ if (c == ' ') {
+ self.method = @enumFromInt(Method.parse(buf[start..index]));
+ start = index + 1;
+ state += 1;
+ }
+ },
+ 1 => {
+ if (c == ' ') {
+ self.target = buf[start..index];
+ start = index + 1;
+ state += 1;
+ }
+ },
+ 2 => {
+ if (c == '\r') {
+ self.version = buf[start..index];
+ start = index + 2;
+ index += 1;
+ state += 1;
+ }
+ },
+ 3 => {
+ if (c == '\r' and (index + 2) < buf.len and buf[index + 2] == '\r') {
+ self.head = buf[start..index];
+
+ if (index + 4 < buf.len) {
+ self.body = buf[index + 4 .. buf.len];
+ }
+ return true;
+ }
+ },
+ else => {},
+ }
+ }
+
+ return true;
+ }
+
+ pub fn get_header(self: Request, name: []const u8) ?[]const u8 {
+ const head = self.head orelse return null;
+ var start: usize = 0;
+ var matching: usize = 0;
+ for (0..head.len) |i| {
+ const c = head[i];
+
+ if (matching < name.len) {
+ if (c == name[matching]) {
+ if (matching == 0) start = i;
+ matching += 1;
+ } else {
+ matching = 0;
+ }
+ } else {
+ if (c == '\r') {
+ return head[start..i];
+ }
+ }
+ }
+ return null;
+ }
+
+ pub fn get_cookie(self: Request, name: []const u8) ?[]const u8 {
+ const cookie = self.get_header("Cookie") orelse return null;
+ var start: usize = 0;
+ var matching: usize = 0;
+ for (0..cookie.len) |i| {
+ const c = cookie[i];
+
+ if (matching < name.len) {
+ if (c == name[matching]) {
+ if (matching == 0) start = i;
+ matching += 1;
+ } else {
+ matching = 0;
+ }
+ } else {
+ if (c == '=') {
+ if (std.mem.indexOfScalarPos(u8, cookie, i, ';')) |semi_index| {
+ return cookie[i + 1 .. semi_index];
+ } else {
+ return cookie[i + 1 .. cookie.len];
+ }
+ } else {
+ matching = 0;
+ }
+ }
+ }
+ return null;
+ }
+
+ pub fn parse1(self: *Request, buf: []const u8) bool {
+ const method_start: usize = 0;
+ const method_end = std.mem.indexOfScalar(u8, buf, ' ') orelse return false;
+ self.method = @enumFromInt(Method.parse(buf[method_start..method_end]));
+
+ const target_start = method_end + 1;
+ const target_end = std.mem.indexOfScalarPos(u8, buf, target_start, ' ') orelse return false;
+ self.target = buf[target_start..target_end];
+
+ const version_start = target_end + 1;
+ const version_end = std.mem.indexOfPos(u8, buf, version_start, "\r\n") orelse buf.len;
+ self.version = buf[version_start..version_end];
+
+ if (version_end + 2 >= buf.len)
+ return true;
+ const head_start = version_end + 2;
+ const head_end = std.mem.indexOfPos(u8, buf, head_start, "\r\n\r\n") orelse buf.len;
+ self.head = buf[head_start..head_end];
+
+ if (head_end + 4 >= buf.len)
+ return true;
+ const body_start = head_end + 4;
+ const body_end = buf.len;
+ self.body = buf[body_start..body_end];
+
+ return true;
+ }
+
+ pub fn get_header1(self: Request, name: []const u8) ?[]const u8 {
+ const head = self.head orelse return null;
+ const header_start = std.mem.indexOf(u8, head, name) orelse return null;
+ const header_end = std.mem.indexOfPos(u8, head, header_start, "\r\n") orelse return null;
+ return head[header_start..header_end];
+ }
+
+ pub fn get_cookie1(self: Request, name: []const u8) ?[]const u8 {
+ const cookie = self.get_header("Cookie") orelse return null;
+ const name_index = std.mem.indexOf(u8, cookie, name) orelse return null;
+ const eql_index = std.mem.indexOfScalarPos(u8, cookie, name_index, '=') orelse return null;
+ if (std.mem.indexOfScalarPos(u8, cookie, eql_index, ';')) |semi_index| {
+ return cookie[eql_index + 1 .. semi_index];
+ } else {
+ return cookie[eql_index + 1 .. cookie.len];
+ }
+ }
+
+ pub fn get_value(self: Request, name: []const u8) ?[]const u8 {
+ const body = self.body orelse return null;
+ const name_index = std.mem.indexOf(u8, body, name) orelse return null;
+ const eql_index = std.mem.indexOfScalarPos(u8, body, name_index, '=') orelse return null;
+ if (std.mem.indexOfScalarPos(u8, body, name_index, '&')) |amp_index| {
+ return body[eql_index + 1 .. amp_index];
+ } else {
+ return body[eql_index + 1 .. body.len];
+ }
+ }
+};
+
+pub const Response = struct {
+ const ExtraHeadersMax = 16;
+ const HeaderList = std.BoundedArray(Header, ExtraHeadersMax);
+
+ fd: posix.fd_t,
+ stream_head: std.io.FixedBufferStream([]u8),
+ stream_body: std.io.FixedBufferStream([]u8),
+ status: Status = .ok,
+ extra_headers: HeaderList = HeaderList.init(0) catch unreachable,
+
+ pub fn init(fd: posix.fd_t, buf_head: []u8, buf_body: []u8) Response {
+ return .{
+ .fd = fd,
+ .stream_head = std.io.fixedBufferStream(buf_head),
+ .stream_body = std.io.fixedBufferStream(buf_body),
+ };
+ }
+
+ pub fn redirect(self: *Response, location: []const u8) !void {
+ self.status = .see_other;
+ try self.add_header("Location", .{ "{s}", .{location} });
+ }
+
+ pub fn add_header(self: *Response, name: []const u8, value: anytype) !void {
+ const header = try self.extra_headers.addOne();
+ try header.name.writer().writeAll(name);
+ if (@typeInfo(@TypeOf(value)).Struct.fields.len < 2 or @sizeOf(@TypeOf(value[1])) == 0) {
+ try header.value.writer().writeAll(value[0]);
+ } else {
+ try std.fmt.format(header.value.writer(), value[0], value[1]);
+ }
+ }
+
+ pub fn write(self: *Response, comptime fmt: []const u8, args: anytype) !void {
+ const writer = self.stream_body.writer();
+
+ if (@sizeOf(@TypeOf(args)) == 0) {
+ try writer.writeAll(fmt);
+ } else {
+ try std.fmt.format(writer, fmt, args);
+ }
+ }
+
+ pub fn send(self: *Response) !void {
+ // write head
+ const writer = self.stream_head.writer();
+
+ try std.fmt.format(writer, "HTTP/1.1 {} {?s}\r\n" ++
+ "Content-Length: {}\r\n", .{ @intFromEnum(self.status), self.status.phrase(), self.stream_body.pos });
+
+ for (self.extra_headers.constSlice()) |header| {
+ try std.fmt.format(writer, "{s}: {s}\r\n", .{ header.name.constSlice(), header.value.constSlice() });
+ }
+
+ try std.fmt.format(writer, "\r\n", .{});
+
+ // write body to head
+
+ try std.fmt.format(writer, "{s}", .{self.stream_body.getWritten()});
+
+ // send head
+
+ const res = self.stream_head.getWritten();
+ var written: usize = 0;
+ while (written < res.len) {
+ written += posix.write(self.fd, res[written..res.len]) catch |err| {
+ std.debug.print("posix.write: {}\n", .{err});
+ continue;
+ };
+ }
+ }
+};
projects / chirp / blobdiff