假设您正在使用proxy_pass指令并且您的 cookie 名称是my_cookie，您可以通过Cookie以下方式从HTTP 标头中剪切此 cookie 及其值：

location /api {

    # save original "Cookie" header value
    set $altered_cookie $http_cookie;

    # check if the "my_cookie" cookie is present
    if ($http_cookie ~ '(.*)(^|;s)my_cookie=("[^"]*"|[^s]*[^;]?)(2|$|;$)(?:;s)?(.*)') {
        # cut "my_cookie" cookie from the string
        set $altered_cookie $1$4$5;
    }

    # hide original "Cookie" header
    proxy_hide_header Cookie;

    # set "Cookie" header to the new value
    proxy_set_header  Cookie $altered_cookie;

    ... # other proxy settings here

    proxy_pass <upstream>; # change to your upstream server
}

这个复杂的正则表达式允许检查my_cookiecookie 是否存在，无论它是在Cookie头值的开头、中间还是结尾。这里有几个例子展示了这个正则表达式如何在不同的字符串上工作：

Whole "Cookie" string                                          $1                      $2      $3            $4      $5                       $1$4$5
-----------------------------------------------------------    --------------------    ----    ----------    ----    ---------------------    -----------------------------------------
"some_cookie=value1; my_cookie=value2; other_cookie=value3"    "some_cookie=value1"    "; "    "value2"      "; "    "other_cookie=value3"    "some_cookie=value1; other_cookie=value3"
"some_cookie=value1; my_cookie=value2"                         "some_cookie=value1"    "; "    "value2"      ""      ""                       "some_cookie=value1"
"my_cookie=value2; other_cookie=value3"                        ""                      ""      "value2; "    ""      "other_cookie=value3"    "other_cookie=value3"
"my_cookie=value2"                                             ""                      ""      "value2"      ""      ""                       ""

对于那些正在寻找相同配方但使用fastcgi_pass代替proxy_pass- 使用fastcgi_param HTTP_COOKIE $altered_cookie if_not_empty;代替proxy_hide_header和proxy_set_header指令的人。