设置Host头无效

[sylingd]

测试代码：

<?php
require('vendor/autoload.php');

go(function() {
	$saber = Swlib\Saber::create([
		'base_uri' => 'http://127.0.0.1',
		'headers' => [
			'Host' => 'example.com',
			'X-Test' => 'test'
		]
	]);

	echo $saber->get('/host.php');
	
	echo "\n-------------------\n";
	
	$saber = Swlib\Saber::create([
		'base_uri' => 'http://127.0.0.1'
	]);
	$saber->setOptions([
		'headers' => [
			'Host' => 'example.com',
			'X-Test' => 'test'
		]
	]);

	echo $saber->get('/host.php');
});

服务器输出内容是：（打印了$_SERVER）：

HTTP/1.1 200 OK
Server: nginx
Date: Wed, 03 Oct 2018 02:57:14 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding
Content-Encoding: gzip

Array
(
    [TEMP] => /tmp
    [TMPDIR] => /tmp
    [TMP] => /tmp
    [PATH] => /usr/local/bin:/usr/bin:/bin
    [USER] => www
    [HOME] => /home/www
    [HTTP_X_TEST] => test
    [HTTP_CONTENT_TYPE] => application/x-www-form-urlencoded
    [HTTP_USER_AGENT] => Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36
    [HTTP_ACCEPT_ENCODING] => gzip
    [HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
    [HTTP_HOST] => 127.0.0.1
    [HTTP_CONNECTION] => keep-alive
    [REDIRECT_STATUS] => 200
    [SERVER_NAME] => _
    [SERVER_PORT] => 80
    [SERVER_ADDR] => 127.0.0.1
    [REMOTE_PORT] => 46126
    [REMOTE_ADDR] => 127.0.0.1
    [SERVER_SOFTWARE] => nginx/1.12.2
    [GATEWAY_INTERFACE] => CGI/1.1
    [REQUEST_SCHEME] => http
    [SERVER_PROTOCOL] => HTTP/1.1
    [DOCUMENT_ROOT] => /web/wwwroot/default
    [DOCUMENT_URI] => /host.php
    [REQUEST_URI] => /host.php
    [SCRIPT_NAME] => /host.php
    [CONTENT_LENGTH] =>
    [CONTENT_TYPE] => application/x-www-form-urlencoded
    [REQUEST_METHOD] => GET
    [QUERY_STRING] =>
    [SCRIPT_FILENAME] => /web/wwwroot/default/host.php
    [FCGI_ROLE] => RESPONDER
    [PHP_SELF] => /host.php
    [REQUEST_TIME_FLOAT] => 1538535434.4496
    [REQUEST_TIME] => 1538535434
)

-------------------
HTTP/1.1 200 OK
Server: nginx
Date: Wed, 03 Oct 2018 02:57:14 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding
Content-Encoding: gzip

Array
(
    [TEMP] => /tmp
    [TMPDIR] => /tmp
    [TMP] => /tmp
    [PATH] => /usr/local/bin:/usr/bin:/bin
    [USER] => www
    [HOME] => /home/www
    [HTTP_X_TEST] => test
    [HTTP_CONTENT_TYPE] => application/x-www-form-urlencoded
    [HTTP_USER_AGENT] => Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36
    [HTTP_ACCEPT_ENCODING] => gzip
    [HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
    [HTTP_HOST] => 127.0.0.1
    [HTTP_CONNECTION] => keep-alive
    [REDIRECT_STATUS] => 200
    [SERVER_NAME] => _
    [SERVER_PORT] => 80
    [SERVER_ADDR] => 127.0.0.1
    [REMOTE_PORT] => 46128
    [REMOTE_ADDR] => 127.0.0.1
    [SERVER_SOFTWARE] => nginx/1.12.2
    [GATEWAY_INTERFACE] => CGI/1.1
    [REQUEST_SCHEME] => http
    [SERVER_PROTOCOL] => HTTP/1.1
    [DOCUMENT_ROOT] => /web/wwwroot/default
    [DOCUMENT_URI] => /host.php
    [REQUEST_URI] => /host.php
    [SCRIPT_NAME] => /host.php
    [CONTENT_LENGTH] =>
    [CONTENT_TYPE] => application/x-www-form-urlencoded
    [REQUEST_METHOD] => GET
    [QUERY_STRING] =>
    [SCRIPT_FILENAME] => /web/wwwroot/default/host.php
    [FCGI_ROLE] => RESPONDER
    [PHP_SELF] => /host.php
    [REQUEST_TIME_FLOAT] => 1538535434.4521
    [REQUEST_TIME] => 1538535434
)

可以看到，X-Test头是成功了的，Host头修改无效

[twose]

设计失误, 被URI对象中的Host覆盖了两次, 一般场景都是直接填host的, 所以没有发现.