C:>set /p x=
C:>set x
C:>x=filestring
Thursday, February 24, 2011
set an environment variable to a string from file
C:>echo filestring > f
C:>set /p x=del f
C:>set x
C:>x=filestring
C:>set /p x=
C:>set x
C:>x=filestring
sample command line to extract registry value via command line
C:>for /F "skip=2 tokens=3" %i in ('reg query hkcr\.pdf\ /ve') do echo %i
Thursday, February 10, 2011
How to Allow JavaScript in Local HTML Files For Specific Files Only
This little annoying thing happens when you author an HTML file on your local computer and include JavaScript in it.
If you use Internet Explorer with default Security options your JavaScript code does not run and you get this information bar message:
IE Help explains:
OK, there is more help online, thanks to Google. Open Internet Options, Advanced tab, scroll down to Security section check "Allow Active Content to run in files on My Computer".
But what if I don't want to lower the advanced security settings? I want to be protected from potential risk and just allow running scripts from local files I created myself. Is there a way to disable the information bar message for some local files, without modifying IE security options? For example, I want all files blocked, except my own local HTML files that include JavaScript I need to run automatically?
It turns out there is a way to mark file as safe to run scripts in it. I tested it on IE 8 on Windows 7. All you need to do to automatically enable script is add a HTML commented indicating that the file was saved from some internet URL. There is a little trick - the comment needs to include a certain number equal to the number of characters in the URL.
Here is an example:
<!-- saved from url=(0020)http://regmagik.com/ -->
<html>
If you add saved from url line abouve to the local HTML file the script will not be blocked by IE.
<script>
your script goes here
</script>
</html>
If you use Internet Explorer with default Security options your JavaScript code does not run and you get this information bar message:
"To help protect your security, Internet Explorer has restricted this webpage from running scripts or ActiveX controls that could access your computer. Click here for options..."
IE Help explains:
A webpage being displayed on your computer tried to run a script or ActiveX control. If you want to allow the control to run, click the Information bar, and then click Allow Blocked Content.There is a way to turn this feature off. But it is not recommended by Microsoft. IE Help goes on:
"Can I turn off the Information bar?Turn it off for each type of message means you need to make several changes in several different places to disable protection. And they don't even have a map of where and how to turn off each type of message, only give a couple of examples.
Yes, you can, but we don't recommend it. If you do want to turn it off, you have to turn it off for each type of message..."
OK, there is more help online, thanks to Google. Open Internet Options, Advanced tab, scroll down to Security section check "Allow Active Content to run in files on My Computer".
But what if I don't want to lower the advanced security settings? I want to be protected from potential risk and just allow running scripts from local files I created myself. Is there a way to disable the information bar message for some local files, without modifying IE security options? For example, I want all files blocked, except my own local HTML files that include JavaScript I need to run automatically?
It turns out there is a way to mark file as safe to run scripts in it. I tested it on IE 8 on Windows 7. All you need to do to automatically enable script is add a HTML commented indicating that the file was saved from some internet URL. There is a little trick - the comment needs to include a certain number equal to the number of characters in the URL.
Here is an example:
<!-- saved from url=(0020)http://regmagik.com/ -->
<html>
If you add saved from url line abouve to the local HTML file the script will not be blocked by IE.
<script>
your script goes here
</script>
</html>
Thursday, December 30, 2010
customErrors defaultRedirect does not work with authentication problems
ASP.NET has a custom error message feature that sometimes does not work. A default generated error page is displayed even if your web.config file includes this configuration:
<customerrors defaultredirect="InternalError.htm" mode="On" />
Microsoft documentation explains it very well, except this detail that I ran into and want to explain here: a custom error page specified in defaultRedirect must be available to unauthenticated uses, otherwise a default generated error page is displayed if an error happens before a user is authenticated. I add the following section to web.config to make it work
web.config snippet:
...
<system.web>
...
<customErrors defaultRedirect="InternalError.htm" mode="On" />
...
</system.web >
...
<!--
this is necessary to allow user to see error page even if they are not logged in
for example this happens when database server is unavailable
-->
<location path="InternalError.htm" >
<system.web>
<authorization>
<allow users="?"/>
</authorization>
</system.web>
</location>
<customerrors defaultredirect="InternalError.htm" mode="On" />
Microsoft documentation explains it very well, except this detail that I ran into and want to explain here: a custom error page specified in defaultRedirect must be available to unauthenticated uses, otherwise a default generated error page is displayed if an error happens before a user is authenticated. I add the following section to web.config to make it work
web.config snippet:
...
<system.web>
...
<customErrors defaultRedirect="InternalError.htm" mode="On" />
...
</system.web >
...
<!--
this is necessary to allow user to see error page even if they are not logged in
for example this happens when database server is unavailable
-->
<location path="InternalError.htm" >
<system.web>
<authorization>
<allow users="?"/>
</authorization>
</system.web>
</location>
Saturday, January 16, 2010
Tuesday, January 5, 2010
How to blog via url
The URL below will open Blog Post entry form with Title "How to blog via url", message "I blogged about blogging", URL and default Blog to Post to selected ("Play and Learn").
How to blog via url: "I blogged about blogging"
http://www.blogger.com/blog-this.g?u=http://regmagik.com&n=How+to+blog+via+url&t=I+blogged+about+blogging&blogID=6694738083154631520
How to blog via url: "I blogged about blogging"
http://www.blogger.com/blog-this.g?u=http://regmagik.com&n=How+to+blog+via+url&t=I+blogged+about+blogging&blogID=6694738083154631520
How to blog via url
How to blog via url:
This url combines blog to post to, title, message and URL that is embedded in a message.
http://www.blogger.com/blog-this.g?u=http://regmagik.com&n=How+to+blog+via+url&t=I+blogged+about+regmagik&blogID=9633914
This url combines blog to post to, title, message and URL that is embedded in a message.
http://www.blogger.com/blog-this.g?u=http://regmagik.com&n=How+to+blog+via+url&t=I+blogged+about+regmagik&blogID=9633914
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