今天配置nginx的basic authentication折腾了好半天，开始error_log一直报错：
no user/password was provided for basic authentication

我是按照nginx的wiki配置的：
location  /  {
  auth_basic            “Restricted”;
  auth_basic_user_file  htpasswd;
}

cat htpasswd
2hei:j3M4coizxFLDM

Since version 0.6.7 the filename path is relative to directory of nginx configuration file nginx.conf, but not to nginx prefix directory.

google了半天，发现了nginx作者Igor的一个回复：

Igor Sysoev
The HTTP Basic authentication works as following:
*) A browser requests a page without user/password.
*) A server response with 401 page, sending realm as well.
   At this stage the 401 code appears in access_log and the message
   “no user/password …” appears in error_log.
*) The browser shows a realm/login/password prompt.
*) If a user will press cancel, then the browser will show the received
   401 page.
*) If the user enters login/password, then the browser repeats the request
   with login/password.

Then until you will exit the browser, it will send these login/password
with all requests in protected hierarchy.

赞一个，牛人果然就是牛人！

经过提示找到了罪魁祸首是error_page的配置 401 403 404 /40x.html;

error_page 401 403 404 /40x.html;
实际上是由于40x.html文件并不存在导致的。把文件建好问题得以解决！

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