php - HTTPS 导致重定向循环？

Question

我正在使用 code igniter，我们的服务器支持一些奇怪的配置。

我希望 certian 页面位于 https 之后，certian 页面位于 http 之后，其他我不关心。

下面是我的设置，

• 如果我转到 http://test.example.com(其中调用了 disable_ssl())，页面加载正常
• 如果我转到 https://test.example.com/login(它调用了 require_ssl())，页面加载正常。
• 如果我访问 http://test.example.com/login，我将被重定向到 https 版本。这很好。
• 如果我转到 https://test.example.com 然后我会遇到重定向循环...出于某种原因， header 一直设置为 https 而不是 http，即使我明确地写了 http。

我的 $_SERVER 数组在 http 请求上看起来像这样

Array
(
    [REDIRECT_STATUS] => 200
    [HTTP_HOST] => test.example.com:80
    [HTTP_X_REAL_IP] => 119.224.22.142
    [HTTP_X_FORWARDED_FOR] => 119.224.22.142
    [HTTP_X_URL_SCHEME] => http
    [HTTP_CONNECTION] => close
    [HTTP_CACHE_CONTROL] => max-age=0
    [HTTP_USER_AGENT] => Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.100 Safari/534.30
    [HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9;q=0.8
    [HTTP_ACCEPT_ENCODING] => gzip,deflate,sdch
    [HTTP_ACCEPT_LANGUAGE] => en-US,en;q=0.8,en-NZ;q=0.6
    [HTTP_ACCEPT_CHARSET] => ISO-8859-1,utf-8;q=0.7,*;q=0.3
    [HTTP_COOKIE] => [...]
    [PATH] => /usr/local/bin:/usr/bin:/bin
    [SERVER_SIGNATURE] => 
Apache/2.2.14 (Ubuntu) Server at test.example.com Port 8080


    [SERVER_SOFTWARE] => Apache/2.2.14 (Ubuntu)
    [SERVER_NAME] => test.example.com
    [SERVER_ADDR] => 127.0.0.1
    [SERVER_PORT] => 8080
    [REMOTE_ADDR] => 127.0.0.1
    [DOCUMENT_ROOT] => /var/www
    [SERVER_ADMIN] => webmaster@localhost
    [SCRIPT_FILENAME] => /var/www/index.php
    [REMOTE_PORT] => 54833
    [REDIRECT_URL] => /
    [GATEWAY_INTERFACE] => CGI/1.1
    [SERVER_PROTOCOL] => HTTP/1.0
    [REQUEST_METHOD] => GET
    [QUERY_STRING] => 
    [REQUEST_URI] => /
    [SCRIPT_NAME] => /index.php
    [PATH_INFO] => /
    [PATH_TRANSLATED] => redirect:/index.php/
    [PHP_SELF] => /index.php/
    [PHP_AUTH_USER] => ******
    [PHP_AUTH_PW] => ******
    [REQUEST_TIME] => 1308972068
)

在 https 请求上它看起来像

Array
(
    [REDIRECT_STATUS] => 200
    [HTTP_HOST] => test.example.com:443
    [HTTP_X_REAL_IP] => 119.224.22.142
    [HTTP_X_FORWARDED_FOR] => 119.224.22.142
    [HTTP_X_URL_SCHEME] => https
    [HTTP_X_FORWARDED_PROTO] => https
    [HTTP_CONNECTION] => close
    [HTTP_USER_AGENT] => Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.100 Safari/534.30
    [HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9;q=0.8
    [HTTP_ACCEPT_ENCODING] => gzip,deflate,sdch
    [HTTP_ACCEPT_LANGUAGE] => en-US,en;q=0.8,en-NZ;q=0.6
    [HTTP_ACCEPT_CHARSET] => ISO-8859-1,utf-8;q=0.7,*;q=0.3
    [HTTP_COOKIE] => [...]
    [PATH] => /usr/local/bin:/usr/bin:/bin
    [SERVER_SIGNATURE] => 
Apache/2.2.14 (Ubuntu) Server at test.example.com Port 8080


    [SERVER_SOFTWARE] => Apache/2.2.14 (Ubuntu)
    [SERVER_NAME] => test.example.com
    [SERVER_ADDR] => 127.0.0.1
    [SERVER_PORT] => 8080
    [REMOTE_ADDR] => 127.0.0.1
    [DOCUMENT_ROOT] => /var/www
    [SERVER_ADMIN] => webmaster@localhost
    [SCRIPT_FILENAME] => /var/www/index.php
    [REMOTE_PORT] => 54841
    [REDIRECT_URL] => /
    [GATEWAY_INTERFACE] => CGI/1.1
    [SERVER_PROTOCOL] => HTTP/1.0
    [REQUEST_METHOD] => GET
    [QUERY_STRING] => 
    [REQUEST_URI] => /
    [SCRIPT_NAME] => /index.php
    [PATH_INFO] => /
    [PATH_TRANSLATED] => redirect:/index.php/
    [PHP_SELF] => /index.php/
    [PHP_AUTH_USER] => ********
    [PHP_AUTH_PW] => ********
    [REQUEST_TIME] => 1308972250
)

我的 .htaccess 看起来像

Options +FollowSymlinks
RewriteEngine on

RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ %1/$1 [R=301,L]


RewriteCond $1 !^(index\.php|robots\.txt|favicon\.ico|css|images|js)
RewriteRule ^(.*)$ index.php/$1 [L] 

所以在我的 index.php 的最顶部有

$_SERVER['SERVER_PORT'] = explode(':', $_SERVER['HTTP_HOST']);
$_SERVER['HTTP_HOST'] = $_SERVER['SERVER_PORT'][0];
$_SERVER['SERVER_PORT'] = $_SERVER['SERVER_PORT'][1];
if($_SERVER['SERVER_PORT'] == 443)
  $_SERVER['HTTPS'] = 'On';
else
  $_SERVER['HTTPS'] = 'Off';

在我需要 HTTPS 的页面上调用

function require_ssl(){
    if($_SERVER['HTTPS'] == 'Off') {
        $host = explode(':', $_SERVER['HTTP_HOST']);
        header('location: https://' . $host[0] . $_SERVER['REQUEST_URI']);
        exit;
    }
}

在我只需要调用 HTTP 的页面上

function disable_ssl(){
    if($_SERVER['HTTPS'] == 'On') {
        $host = explode(':', $_SERVER['HTTP_HOST']);
        header('location: http://' . $host[0] . $_SERVER['REQUEST_URI']);
        exit;
    }
}

Answer 1

因此，经过数小时的痛苦调试，我们终于解决了这个问题。

Nginx
是的，负载均衡器正在执行它自己的重定向。

在 nginx 设置中存在这一行 proxy_redirect http://https://;

那么，发生了什么事？

嗯，我的代码是说“这个页面不应该是 https，重定向”
然后 nginx 说“这个请求不是 https，重定向”
然后我的代码是...
boom 重定向循环。

因此，通过将 proxy_redirect http://https://; 更改为 proxy_redirect Off; 我们解决了问题:)