asp.netweb-confignwebsec

Using configSource with NWebsec

In an attempt to simplify our web.config, I wanted to break out the NWebsec configuration into a separate file using the configSource attribute:

web.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <sectionGroup name="nwebsec">
      <section name="httpHeaderSecurityModule" type="NWebsec.Modules.Configuration.HttpHeaderSecurityConfigurationSection, NWebsec, Version=4.2.0.0, Culture=neutral, PublicKeyToken=3613da5f958908a1" requirePermission="false" />
    </sectionGroup>
  </configSections>
  <nwebsec configSource="App_Config\NWebsec.config" />
  <!--- remainder of file omitted for brevity -->
</configuration>

App_Config\NWebsec.config

<?xml version="1.0"?>
<nwebsec>
  <httpHeaderSecurityModule xmlns="http://nwebsec.com/HttpHeaderSecurityModuleConfig.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <redirectValidation enabled="true">
      <!-- omitted for brevity -->
    </redirectValidation>
    <securityHttpHeaders>
      <!-- omitted for brevity -->
    </securityHttpHeaders>
  </httpHeaderSecurityModule>
</nwebsec>

When I make a request to the application I now receive a HTTP 500 error with no other details. There is also nothing related in the Windows Event Viewer.

Is what I'm attempting possible with NWebsec configuration?

How do I get more detail on the error which is occurring and causing the HTTP 500 response?

Solution

  • I believe this is because the nwebsec element is defined as a sectionGroup:

    <sectionGroup name="nwebsec">
  <section name="httpHeaderSecurityModule" type="..." />
</sectionGroup>

    The configSource attribute works for the section element only.

    Amending the web.config:

    <nwebsec>
  <httpHeaderSecurityModule configSource="App_Config\NWebsec.config" />
</nwebsec>

    In addition to amending the root element of the referenced file (App_Config\NWebsec.config), enables this to work as desired:

    <?xml version="1.0"?>
<httpHeaderSecurityModule xmlns="http://nwebsec.com/HttpHeaderSecurityModuleConfig.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <redirectValidation enabled="true">
  ...