这让我抓狂！我正在尝试使用Amazon S3 CORS请求，但他们无法在我的计算机上运行。我的计算机似乎阻止或忽略了OPTIONS请求。如果我从终端运行CURL命令：
curl -i -X OPTIONS http://testing.bennadel.com.s3.amazonaws.com
......我明白了：
curl：（52）来自服务器的空回复
但是，如果我在相同的路由器上的另一台计算机（AirBook）上运行相同的请求，我会得到预期的响应（以XML格式）：
信息不足。需要原始请求标题。
我试过刷新我的dsn缓存（通过dscacheutil）。我已尝试更改DNS以使用Google的公共DNS。我试过重新启动电脑。没运气！这台计算机不断阻止OPTIONS请求，我尝试的每台其他计算机都允许它。
连连呢？这台电脑（iMac）通过WiFi连接到我的路由器;但是，AirBook也是如此，它提出了成功的OPTIONS请求。
另请注意，对同一URL的非OPTIONS请求可以正常工作（即GET）。
答案 0 :(得分：8)
更具体地说，问题似乎出现在AnyConnect的Web安全模块中。通过卸载并重新安装AnyConnect，并且未选中Web Security选项，我能够解决问题。或者，只需运行websecurity_uninstall.sh脚本即可。 （这与AnyConnect 3.1.04074有关。）
感谢@ user3021922和其他人发现问题 - 这也让我发疯了。
答案 1 :(得分：0)
问题是Cisco AnyConnect的网络安全模块。在我们的例子中，我们无法卸载AnyConnect或对其进行任何更改（大型企业设置，其中更改将非常昂贵/耗时）。幸运的是，似乎有两种解决方案可行。
# 1.To use URL Alias you need to be running apache with mod_rewrite enabled.
# 2. In your opencart directory rename htaccess.txt to .htaccess.
# For any support issues please visit: http://www.opencart.com
Options +FollowSymlinks
# Prevent Directoy listing
Options -Indexes
# Prevent Direct Access to files
<FilesMatch "(?i)((\.tpl|\.ini|\.log|(?<!robots)\.txt))">
Order deny,allow
Deny from all
</FilesMatch>
# SEO URL Settings
RewriteEngine On
# If your opencart installation does not run on the main web folder make sure you folder it does run in ie. / becomes /shop/
# RewriteBase /
RewriteRule ^sitemap.xml$ index.php?route=feed/google_sitemap [L]
RewriteRule ^googlebase.xml$ index.php?route=feed/google_base [L]
RewriteRule ^system/download/(.*) /index.php?route=error/not_found [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !.*\.(ico|gif|jpg|jpeg|png|js|css)
RewriteRule ^([^?]*) index.php?_route_=$1 [L,QSA]
### Additional Settings that may need to be enabled for some servers
### Uncomment the commands by removing the # sign in front of it.
### If you get an "Internal Server Error 500" after enabling any of the following settings, restore the # as this means your host doesn't allow that.
# 1. If your cart only allows you to add one item at a time, it is possible register_globals is on. This may work to disable it:
# php_flag register_globals off
# 2. If your cart has magic quotes enabled, This may work to disable it:
# php_flag magic_quotes_gpc Off
# 3. Set max upload file size. Most hosts will limit this and not allow it to be overridden but you can try
# php_value upload_max_filesize 999M
# 4. set max post size. uncomment this line if you have a lot of product options or are getting errors where forms are not saving all fields
# php_value post_max_size 999M
# 5. set max time script can take. uncomment this line if you have a lot of product options or are getting errors where forms are not saving all fields
# php_value max_execution_time 200
# 6. set max time for input to be recieved. Uncomment this line if you have a lot of product options or are getting errors where forms are not saving all fields
# php_value max_input_time 200
# 7. disable open_basedir limitations
# php_admin_value open_basedir none
和80（其他端口似乎正常）。8080请求。因此，如果您可以控制服务器，请将其放在不同的端口或使用https，您的用户就可以了。