Minor HTTP refactor
This commit is contained in:
parent
159f1c28cc
commit
0ce315368a
9 changed files with 190 additions and 180 deletions
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@ -3,13 +3,15 @@ const ciutf8 = @import("util").ciutf8;
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const request = @import("./request.zig");
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pub const server = @import("./server.zig");
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const server = @import("./server.zig");
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pub const Method = std.http.Method;
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pub const Status = std.http.Status;
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pub const Request = request.Request;
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pub const Server = server.Server;
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pub const serveConn = server.serveConn;
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pub const Response = server.Response;
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pub const Handler = server.Handler;
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pub const Headers = std.HashMap([]const u8, []const u8, struct {
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pub fn eql(_: @This(), a: []const u8, b: []const u8) bool {
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@ -4,13 +4,25 @@ const http = @import("./lib.zig");
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const parser = @import("./request/parser.zig");
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pub const Request = struct {
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pub const Protocol = enum {
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http_1_0,
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http_1_1,
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};
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protocol: Protocol,
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source_address: ?std.net.Address,
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method: http.Method,
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path: []const u8,
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uri: []const u8,
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headers: http.Headers,
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body: ?[]const u8 = null,
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pub fn parse(alloc: std.mem.Allocator, reader: anytype) !Request {
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return parser.parse(alloc, reader);
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pub fn parse(alloc: std.mem.Allocator, reader: anytype, addr: std.net.Address) !Request {
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return parser.parse(alloc, reader, addr);
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}
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pub fn parseFree(self: Request, alloc: std.mem.Allocator) void {
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parser.parseFree(alloc, self);
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}
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};
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@ -22,34 +22,45 @@ const Encoding = enum {
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chunked,
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};
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pub fn parse(alloc: std.mem.Allocator, reader: anytype) !Request {
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var request: Request = undefined;
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try parseLine(alloc, &request, reader);
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request.headers = try parseHeaders(alloc, reader);
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if (request.method.requestHasBody()) {
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request.body = try readBody(alloc, request.headers, reader);
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} else {
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request.body = null;
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}
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return request;
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}
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fn parseLine(alloc: std.mem.Allocator, request: *Request, reader: anytype) !void {
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request.method = try parseMethod(reader);
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request.path = reader.readUntilDelimiterAlloc(alloc, ' ', max_path_len) catch |err| switch (err) {
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pub fn parse(alloc: std.mem.Allocator, reader: anytype, address: std.net.Address) !Request {
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const method = try parseMethod(reader);
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const uri = reader.readUntilDelimiterAlloc(alloc, ' ', max_path_len) catch |err| switch (err) {
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error.StreamTooLong => return error.RequestUriTooLong,
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else => return err,
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};
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errdefer alloc.free(request.path);
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errdefer alloc.free(uri);
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try checkProto(reader);
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const proto = try parseProto(reader);
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// discard \r\n
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_ = try reader.readByte();
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_ = try reader.readByte();
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var headers = try parseHeaders(alloc, reader);
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errdefer freeHeaders(alloc, &headers);
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const body = if (method.requestHasBody())
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try readBody(alloc, headers, reader)
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else
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null;
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errdefer if (body) |b| alloc.free(b);
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const eff_addr = if (headers.get("X-Real-IP")) |ip|
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std.net.Address.parseIp(ip, address.getPort()) catch {
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return error.BadRequest;
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}
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else
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address;
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return Request{
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.protocol = proto,
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.source_address = eff_addr,
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.method = method,
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.uri = uri,
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.headers = headers,
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.body = body,
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};
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}
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fn parseMethod(reader: anytype) !Method {
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@ -68,7 +79,7 @@ fn parseMethod(reader: anytype) !Method {
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return error.MethodNotImplemented;
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}
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fn checkProto(reader: anytype) !void {
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fn parseProto(reader: anytype) !Request.Protocol {
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var buf: [8]u8 = undefined;
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const proto = reader.readUntilDelimiter(&buf, '/') catch |err| switch (err) {
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error.StreamTooLong => return error.UnknownProtocol,
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@ -84,14 +95,24 @@ fn checkProto(reader: anytype) !void {
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return error.BadRequest;
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}
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if (buf[0] != '1' or buf[2] != '1') {
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return error.HttpVersionNotSupported;
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}
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if (buf[0] != '1') return error.HttpVersionNotSupported;
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return switch (buf[2]) {
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'0' => .http_1_0,
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'1' => .http_1_1,
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else => error.HttpVersionNotSupported,
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};
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}
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fn parseHeaders(allocator: std.mem.Allocator, reader: anytype) !Headers {
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var map = Headers.init(allocator);
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errdefer map.deinit();
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errdefer {
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var iter = map.iterator();
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while (iter.next()) |it| {
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allocator.free(it.key_ptr.*);
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allocator.free(it.value_ptr.*);
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}
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}
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// todo:
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//errdefer {
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//var iter = map.iterator();
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@ -167,6 +188,21 @@ fn parseEncoding(encoding: ?[]const u8) !Encoding {
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return error.UnsupportedMediaType;
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}
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pub fn parseFree(allocator: std.mem.Allocator, request: *Request) void {
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allocator.free(request.uri);
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freeHeaders(allocator, &request.headers);
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if (request.body) |body| allocator.free(body);
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}
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fn freeHeaders(allocator: std.mem.Allocator, headers: *http.Headers) void {
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var iter = headers.iterator();
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while (iter.next()) |it| {
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allocator.free(it.key_ptr.*);
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allocator.free(it.value_ptr.*);
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}
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headers.deinit();
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}
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const _test = struct {
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const expectEqual = std.testing.expectEqual;
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const expectEqualStrings = std.testing.expectEqualStrings;
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@ -2,67 +2,69 @@ const std = @import("std");
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const util = @import("util");
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const http = @import("./lib.zig");
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const connection = @import("./server/connection.zig");
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const response = @import("./server/response.zig");
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pub const Connection = connection.Connection;
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pub const Response = response.ResponseStream(Connection.Writer);
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pub const Response = struct {
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alloc: std.mem.Allocator,
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stream: std.net.Stream,
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should_close: bool = false,
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pub const Stream = response.ResponseStream(std.net.Stream.Writer);
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pub fn open(self: *Response, status: http.Status, headers: *const http.Headers) !Stream {
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if (headers.get("Connection")) |hdr| {
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if (std.ascii.indexOfIgnoreCase(hdr, "close")) |_| self.should_close = true;
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}
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return response.open(self.alloc, self.stream.writer(), headers, status);
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}
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};
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const ConnectionServer = connection.Server;
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const Request = http.Request;
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const request_buf_size = 1 << 16;
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pub const Context = struct {
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alloc: std.mem.Allocator,
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request: Request,
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connection: Connection,
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pub fn Handler(comptime Ctx: type) type {
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return fn (Ctx, Request, *Response) void;
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}
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pub fn openResponse(self: *Context, headers: *const http.Headers, status: http.Status) !Response {
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return try response.open(self.alloc, self.connection.stream.writer(), headers, status);
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}
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pub fn serveConn(conn: std.net.StreamServer.Connection, ctx: anytype, handler: anytype, alloc: std.mem.Allocator) !void {
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// TODO: Timeouts
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while (true) {
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std.log.debug("waiting for request", .{});
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var arena = std.heap.ArenaAllocator.init(alloc);
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defer arena.deinit();
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pub fn close(self: *Context) void {
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// todo: deallocate request
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self.connection.close();
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}
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};
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pub const Server = struct {
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conn_server: ConnectionServer,
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pub fn listen(addr: std.net.Address) !Server {
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return Server{
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.conn_server = try ConnectionServer.listen(addr),
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const req = Request.parse(arena.allocator(), conn.stream.reader(), conn.address) catch |err| {
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return handleError(conn.stream.writer(), err) catch {};
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};
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std.log.debug("done parsing", .{});
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var res = Response{
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.alloc = arena.allocator(),
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.stream = conn.stream,
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};
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handler(ctx, req, &res);
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std.log.debug("done handling", .{});
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if (req.headers.get("Connection")) |hdr| {
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if (std.ascii.indexOfIgnoreCase(hdr, "close")) |_| return;
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} else if (req.headers.get("Keep-Alive")) |hdr| {
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std.log.debug("keep-alive: {s}", .{hdr});
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} else if (req.protocol == .http_1_0) return;
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if (res.should_close) return;
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}
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}
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pub fn accept(self: *Server, alloc: std.mem.Allocator) !Context {
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while (true) {
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const conn = try self.conn_server.accept();
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errdefer conn.close();
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const req = http.Request.parse(alloc, conn.stream.reader()) catch |err| {
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handleError(conn.stream.writer(), err) catch unreachable;
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continue;
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};
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return Context{ .connection = conn, .request = req, .alloc = alloc };
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}
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}
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pub fn shutdown(self: *Server) void {
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self.conn_server.shutdown();
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}
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};
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// TODO: We should get more specific about what type of errors can happen
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/// Writes an error response message and requests closure of the connection
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fn handleError(writer: anytype, err: anyerror) !void {
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const status: http.Status = switch (err) {
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error.EndOfStream => return, // Do nothing, the client closed the connection
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error.BadRequest => .bad_request,
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error.UnsupportedMediaType => .unsupported_media_type,
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error.HttpVersionNotSupported => .http_version_not_supported,
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else => return err,
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else => .internal_server_error,
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};
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try writer.print("HTTP/1.1 {} {?s}\r\n\r\n", .{ @enumToInt(status), status.phrase() });
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try writer.print("HTTP/1.1 {} {?s}\r\nConnection: close\r\n\r\n", .{ @enumToInt(status), status.phrase() });
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}
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@ -1,51 +0,0 @@
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const std = @import("std");
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pub const Connection = struct {
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pub const Id = u64;
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pub const Writer = std.net.Stream.Writer;
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pub const Reader = std.net.Stream.Reader;
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id: Id,
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address: std.net.Address,
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stream: std.net.Stream,
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fn new(id: Id, std_conn: std.net.StreamServer.Connection) Connection {
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std.log.debug("new connection conn_id={}", .{id});
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return .{
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.id = id,
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.address = std_conn.address,
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.stream = std_conn.stream,
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};
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}
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pub fn close(self: Connection) void {
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std.log.debug("terminating connection conn_id={}", .{self.id});
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self.stream.close();
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}
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};
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pub const Server = struct {
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next_conn_id: std.atomic.Atomic(Connection.Id) = std.atomic.Atomic(Connection.Id).init(1),
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stream_server: std.net.StreamServer,
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pub fn listen(addr: std.net.Address) !Server {
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var self = Server{
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.stream_server = std.net.StreamServer.init(.{ .reuse_address = true }),
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};
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errdefer self.stream_server.deinit();
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try self.stream_server.listen(addr);
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return self;
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}
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pub fn accept(self: *Server) !Connection {
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const conn = try self.stream_server.accept();
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const id = self.next_conn_id.fetchAdd(1, .SeqCst);
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return Connection.new(id, conn);
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}
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pub fn shutdown(self: *Server) void {
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self.stream_server.deinit();
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}
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};
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@ -111,9 +111,7 @@ pub fn ResponseStream(comptime BaseWriter: type) type {
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}
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fn flushBodyUnchunked(self: *Self) Error!void {
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if (self.buffer_pos != 0) {
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try self.base_writer.print("Content-Length: {}\r\n", .{self.buffer_pos});
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}
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try self.base_writer.print("Content-Length: {}\r\n", .{self.buffer_pos});
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try self.base_writer.writeAll("\r\n");
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@ -128,6 +126,7 @@ pub fn ResponseStream(comptime BaseWriter: type) type {
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}
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pub fn finish(self: *Self) Error!void {
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std.log.debug("finishing", .{});
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if (!self.chunked) {
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try self.flushBodyUnchunked();
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} else {
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@ -13,14 +13,13 @@ pub const invites = @import("./controllers/invites.zig");
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pub const users = @import("./controllers/users.zig");
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pub const notes = @import("./controllers/notes.zig");
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pub fn routeRequest(api_source: anytype, ctx: http.server.Context, alloc: std.mem.Allocator) void {
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pub fn routeRequest(api_source: anytype, req: http.Request, res: *http.Response, alloc: std.mem.Allocator) void {
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// TODO: hashmaps?
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inline for (routes) |route| {
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if (Context(route).matchAndHandle(api_source, ctx, alloc)) return;
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}
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var response = Response{ .headers = http.Headers.init(alloc), .ctx = ctx };
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var response = Response{ .headers = http.Headers.init(alloc), .res = res };
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defer response.headers.deinit();
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inline for (routes) |route| {
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if (Context(route).matchAndHandle(api_source, req, &response, alloc)) return;
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}
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response.status(.not_found) catch {};
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}
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@ -53,7 +52,7 @@ pub fn Context(comptime Route: type) type {
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allocator: std.mem.Allocator,
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method: http.Method,
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request_line: []const u8,
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uri: []const u8,
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headers: http.Headers,
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args: Args,
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@ -84,20 +83,16 @@ pub fn Context(comptime Route: type) type {
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@compileError("Unsupported Type " ++ @typeName(T));
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}
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pub fn matchAndHandle(api_source: *api.ApiSource, ctx: http.server.Context, alloc: std.mem.Allocator) bool {
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const req = ctx.request;
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pub fn matchAndHandle(api_source: *api.ApiSource, req: http.Request, res: *Response, alloc: std.mem.Allocator) bool {
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if (req.method != Route.method) return false;
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var path = std.mem.sliceTo(std.mem.sliceTo(req.path, '#'), '?');
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var path = std.mem.sliceTo(std.mem.sliceTo(req.uri, '#'), '?');
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var args: Args = parseArgs(path) orelse return false;
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var response = Response{ .headers = http.Headers.init(alloc), .ctx = ctx };
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defer response.headers.deinit();
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var self = Self{
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.allocator = alloc,
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.method = req.method,
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.request_line = req.path,
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.uri = req.uri,
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.headers = req.headers,
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.args = args,
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@ -105,7 +100,7 @@ pub fn Context(comptime Route: type) type {
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.query = undefined,
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};
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self.prepareAndHandle(api_source, req, &response);
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self.prepareAndHandle(api_source, req, res);
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return true;
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}
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@ -149,15 +144,20 @@ pub fn Context(comptime Route: type) type {
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fn parseQuery(self: *Self) !void {
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if (Query != void) {
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const path = std.mem.sliceTo(self.request_line, '?');
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const q = std.mem.sliceTo(self.request_line[path.len..], '#');
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const path = std.mem.sliceTo(self.uri, '?');
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const q = std.mem.sliceTo(self.uri[path.len..], '#');
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self.query = try query_utils.parseQuery(Query, q);
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}
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}
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fn handle(self: Self, response: *Response, api_conn: anytype) void {
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Route.handler(self, response, api_conn) catch |err| std.log.err("{}", .{err});
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Route.handler(self, response, api_conn) catch |err| switch (err) {
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else => {
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std.log.err("{}", .{err});
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response.err(.internal_server_error, "", {}) catch {};
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},
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};
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}
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fn getApiConn(self: *Self, api_source: anytype) !api.ApiSource.Conn {
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@ -180,18 +180,25 @@ pub fn Context(comptime Route: type) type {
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pub const Response = struct {
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const Self = @This();
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headers: http.Headers,
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ctx: http.server.Context,
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res: *http.Response,
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opened: bool = false,
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pub fn status(self: *Self, status_code: http.Status) !void {
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var stream = try self.ctx.openResponse(&self.headers, status_code);
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std.debug.assert(!self.opened);
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self.opened = true;
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var stream = try self.res.open(status_code, &self.headers);
|
||||
defer stream.close();
|
||||
try stream.finish();
|
||||
}
|
||||
|
||||
pub fn json(self: *Self, status_code: http.Status, response_body: anytype) !void {
|
||||
std.debug.assert(!self.opened);
|
||||
self.opened = true;
|
||||
|
||||
try self.headers.put("Content-Type", "application/json");
|
||||
|
||||
var stream = try self.ctx.openResponse(&self.headers, status_code);
|
||||
var stream = try self.res.open(status_code, &self.headers);
|
||||
defer stream.close();
|
||||
|
||||
const writer = stream.writer();
|
||||
|
|
|
|||
|
|
@ -8,36 +8,8 @@ const api = @import("api");
|
|||
pub const migrations = @import("./migrations.zig"); // TODO
|
||||
const c = @import("./controllers.zig");
|
||||
|
||||
pub const RequestServer = struct {
|
||||
alloc: std.mem.Allocator,
|
||||
api: *api.ApiSource,
|
||||
config: Config,
|
||||
|
||||
fn init(alloc: std.mem.Allocator, src: *api.ApiSource, config: Config) !RequestServer {
|
||||
return RequestServer{
|
||||
.alloc = alloc,
|
||||
.api = src,
|
||||
.config = config,
|
||||
};
|
||||
}
|
||||
|
||||
fn listenAndRun(self: *RequestServer, addr: std.net.Address) !void {
|
||||
var srv = http.Server.listen(addr) catch unreachable;
|
||||
defer srv.shutdown();
|
||||
|
||||
while (true) {
|
||||
var arena = std.heap.ArenaAllocator.init(self.alloc);
|
||||
defer arena.deinit();
|
||||
|
||||
var ctx = try srv.accept(arena.allocator());
|
||||
defer ctx.close();
|
||||
|
||||
c.routeRequest(self.api, ctx, arena.allocator());
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
pub const Config = struct {
|
||||
worker_threads: usize = 10,
|
||||
db: sql.Config,
|
||||
};
|
||||
|
||||
|
|
@ -91,6 +63,34 @@ fn prepareDb(pool: *sql.ConnPool, alloc: std.mem.Allocator) !void {
|
|||
}
|
||||
}
|
||||
|
||||
const ConnectionId = u64;
|
||||
var next_conn_id = std.atomic.Atomic(ConnectionId).init(0);
|
||||
|
||||
fn thread_main(src: *api.ApiSource, srv: *std.net.StreamServer) void {
|
||||
util.seedThreadPrng() catch unreachable;
|
||||
const thread_id = std.Thread.getCurrentId();
|
||||
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||||
|
||||
while (true) {
|
||||
var conn = srv.accept() catch |err| {
|
||||
std.log.err("Error accepting connection: {}", .{err});
|
||||
continue;
|
||||
};
|
||||
defer conn.stream.close();
|
||||
const conn_id = next_conn_id.fetchAdd(1, .SeqCst);
|
||||
std.log.debug("Accepting TCP connection id {} on thread {}", .{ conn_id, thread_id });
|
||||
defer std.log.debug("Closing TCP connection id {}", .{conn_id});
|
||||
|
||||
http.serveConn(conn, .{ .src = src, .conn_id = conn_id, .allocator = gpa.allocator() }, handle, gpa.allocator()) catch |err| {
|
||||
std.log.err("Error occured on connection {}: {}", .{ conn_id, err });
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
fn handle(ctx: anytype, req: http.Request, res: *http.Response) void {
|
||||
c.routeRequest(ctx.src, req, res, ctx.allocator);
|
||||
}
|
||||
|
||||
pub fn main() !void {
|
||||
try util.seedThreadPrng();
|
||||
|
||||
|
|
@ -100,6 +100,9 @@ pub fn main() !void {
|
|||
try prepareDb(&pool, gpa.allocator());
|
||||
|
||||
var api_src = try api.ApiSource.init(&pool);
|
||||
var srv = try RequestServer.init(gpa.allocator(), &api_src, cfg);
|
||||
return srv.listenAndRun(std.net.Address.parseIp("0.0.0.0", 8080) catch unreachable);
|
||||
var srv = std.net.StreamServer.init(.{ .reuse_address = true });
|
||||
defer srv.deinit();
|
||||
try srv.listen(std.net.Address.parseIp("0.0.0.0", 8080) catch unreachable);
|
||||
|
||||
thread_main(&api_src, &srv);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -453,7 +453,7 @@ fn Tx(comptime tx_level: u8) type {
|
|||
comptime var table_spec: []const u8 = table ++ "(";
|
||||
comptime var value_spec: []const u8 = "(";
|
||||
inline for (fields) |field, i| {
|
||||
// This causes a compile error. Why?
|
||||
// This causes a compiler crash. Why?
|
||||
//const F = field.field_type;
|
||||
const F = @TypeOf(@field(std.mem.zeroes(ValueType), field.name));
|
||||
// causes issues if F is @TypeOf(null), use dummy type
|
||||
|
|
|
|||
Loading…
Reference in a new issue