在 4.6 版本中，对 Swoole\Http\Response 进行了一些加强：

  • 增加 Http\Response::isWritable (db56827) (@matyhtf)
  • 加强 Response\create() 办法，能够独立于 Server 应用 (#3998) (@matyhtf)

再来看一下上一篇文章的示例代码：

use Swoole\Server;use Swoole\Http\Request;$server = new Server('127.0.0.1', 9501);$server->on('Receive', function (Server $server, $fd, $reactor_id, $data) {    /** @var Request $request */    $request = Request::create();    $request->parse($data);    $body = 'Hello, Swoole';    $body_len = strlen($body);    $send_data = "HTTP/1.1 200 OK\r\nServer: swoole-server\r\nContent-Type: text/html;charset=utf-8\r\nContent-Length: {$body_len}\r\nConnection: keep-alive\r\n\r\n{$body}";    $server->send($fd, $send_data);});$server->start();

须要用户自行处理$send_data的数据，而此次加强当前，能够这样应用：

use Swoole\Server;use Swoole\Http\Request;use Swoole\Http\Response;$server = new Server('127.0.0.1', 9501);$server->on('Receive', function (Server $server, $fd, $reactor_id, $data) {    /** @var Request $request */    $request = Request::create();    $request->parse($data);    /** @var Response $response */    $response = Response::create($server, $fd);    $response->status(200);    $response->end('Hello, Swoole');});$server->start();

还能够这样：

$server->on('Receive', function (Server $server, $fd, $reactor_id, $data) {    /** @var Request $request */    $request = Request::create();    $request->parse($data);    /** @var Response $response */    $response = Response::create([$server, $request], $fd);    $response->status(200);    $response->end('Hello, Swoole');});

岂但异步 Server 中能够应用，而且协程 Server 中也能够应用：

use Swoole\Coroutine\Server;use Swoole\Coroutine\Server\Connection;use Swoole\Http\Request;use Swoole\Http\Response;use function Swoole\Coroutine\run;run(function () {    $server = new Server('0.0.0.0', 9501, false);    $server->handle(function (Connection $conn) use ($server) {        $request = Request::create();        while(true) {            $data = $conn->recv();            if (strlen($data) != $request->parse($data) || $request->isCompleted()) {                break;            }        }        $response = Response::create([$conn->exportSocket(), $request]);        $response->end('Hello, Swoole');    });    $server->start();});

这样就能够间接应用 Http\Response 的 API 进行响应解决，而不必自行组装 HTTP 协定响应数据。

isWritable

isWritable() 用来判断 Http\Response 对象是否已完结 (end) 或已拆散 (detach)，例如：

use Swoole\Http\Server;use Swoole\Http\Request;use Swoole\Http\Response;$http = new Server('0.0.0.0', 9501);$http->on('request', function (Request $req, Response $resp) {    assert($resp->isWritable(), true);    $resp->end('hello');    assert($resp->isWritable(), false);    $resp->setStatusCode(403);});$http->start();

如果在调用end()之后，再次调用相干 API，就会产生谬误

PHP Warning:  Swoole\Http\Response::setStatusCode(): http response is unavailable (maybe it has been ended or detached)