如何从nginx发出相对URL重定向? [英] how to issue a relative url redirect from nginx?

问题描述

如何在nginx中配置重定向，以使用相对于特定路径的相对重定向来响应某个URL?

How can a redirect be configured in nginx to respond to a certain url with a relative redirect to a specific path?

nginx文档建议这是nginx的默认模式，但实际上，如果重定向到以/nginx开头的位置以位置"字段中的绝对URL进行响应.

The nginx documentation suggests that this is the default mode for nginx, but in reality if the location being redirected to starts with a / nginx is responding with an absolute url in the Location field.

对于包含位置的本地服务器配置:

For local server configuration containing locations:

location = /a {
  return 301 some/path;
}
location = /b {
  return 301 /qwerty;
}

对/a请求的响应位置为:

the response Location to a request to /a is:

Location: some/path

对于/b，它是:

Location: http://127.0.0.1/qwerty

但是，我们希望/b做出回应:

however, we would like /b to respond with:

Location: /qwerty

我们要使用相对重定向的原因是，我们希望从不同的域和代理访问nginx，例如可以通过dev或通过ssl终止负载均衡器来实现，并且宁可通过减轻需要了解该上下文的nginx来简化事情.

The reason we would like to use relative redirects is that we would like to access nginx from different domains and proxies, e.g. in clear in dev or via ssl-terminating load-balancer, and would rather keep things simple by relieving nginx of needing to understand that context.

仅供参考，这些示例使用例如curl进行了针对nginx版本1.4.6和1.9.6的测试:

FYI these examples were tested against nginx versions 1.4.6 and 1.9.6, using curl e.g.:

curl --head http://127.0.0.1/b

推荐答案

如果return uri以/开头，nginx标头过滤器总是插入<scheme>://<host>. (请参阅nginx源中的ngx_http_script_return_code()和ngx_http_header_filter()函数以供参考)

nginx header filter always inserts <scheme>://<host> if return uri starts with /.
(see ngx_http_script_return_code() and ngx_http_header_filter() function in nginx source for reference)

因此，如果客户端(例如Google chrome)可以接受Location: /qwerty，则可以使用以下配置:

So, if client (e.g. google chrome) can accept Location: /qwerty, you can use the following configure:

location = /b {
    return 301 " /qwerty";    # insert space char before "/qwerty"
}

---

另一种解决方案可以通过 lua-nginx-module 完全生成Location: /qwerty add_header 指令:

---

Another solution can generate Location: /qwerty exactly, via lua-nginx-module and add_header directive:

location = /b {
    add_header Location "/qwerty";
    content_by_lua 'ngx.exit(301)';
}

这个奇怪的配置如何工作?

How does this weird configure work?

• 使用ngx.exit以状态代码301退出，它不会创建"Location"标头(return指令始终创建"Location"标头，即使标头值为空)
• 使用add_header添加Location: /qwerty标头，但不插入<scheme>://<host>

• use ngx.exit to exit with status code with 301, it does not create "Location" header (return directive always create "Location" header, even empty header value)
• use add_header to add Location: /qwerty header, it does not insert <scheme>://<host>

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