ASP-generated pseudo-parametric programming techniques-application techniques

The first two days in a station version of the enterprise search engine, found that some sites can link site content.
Strange under Look, the original is according to the database ID automatic numbering rules to link ~ ~
Spare time to get the following this dongdong, hope for everyone in the future to write ASP program Help!
<%

'//Generate random digits of specified number of digits

"//can also use Guidy write Ixuer_rnd_str function, with 15 kinds of styles, can be pseudo MD5!!

Function Rndstr (Strlong)

Dim TempStr

Randomize

Do While Len (RNDSTR) < Strlong

Tempstr=cstr (CHR (57-48) *rnd+48)

Rndstr=rndstr&tempstr

Loop

Rndstr=rndstr

End Function

%>

The following are examples of parameters submitted in form forms for Request.Form, parameters that need to be passed doaction the original value is the ID read from the database

<form name=iform action= "abc.asp" method= "POST" >

<input name=doaction type= "hidden" value= "<%=rndstr (a)%><%=rs (" ID ")%><%=rndstr (a)%>" >

</form>

Attention:

The value of the above doaction has changed, each refresh page to get a different value ~ ~

Here is the abc.asp page

First get the value of Doaction

Doaction = Trim (Request.Form ("Doaction"))

Below you can add a little verification, such as IsNumeric!

And then we'll break down the doaction value.

Dim LastID

Doaction = Mid (doaction,11)

LastID = Mid (Doaction,1,len (doaction)-10)

If you are familiar with the mid function, the contents of the above can be easily guessed, simple?

Here is the actual example:

Original Doaction the ID to pass is in the database (field type is AutoNumber) value is: 34

Description

11 of Mid (doaction,11) generates random character digits of +1 for you

The 10 LastID = Mid (doaction)-10) is the number of random character digits that are generated for the specified generation!

Dim LastID

Doaction = 3614354944348151287527-After a disguised ID value (can be validated as a number)

Doaction = Mid (doaction,11)

LastID = Mid (Doaction,1,len (doaction)-10)

LastID = 34

I experimented with it, and if combined with randomly generated letters and numbers, it could be a MD5-like value!

Just a condition, to be able to specify the number of digits of random characters!

Haha, now everybody Response.Write output LastID value to see, is it also the ID of the database?

This method can be applied to the video parameters of the encryption, download and so on. If you do the government's official document circulation system, you can also use the file above!

For Request.QueryString is also the same reason! Divert ...

The above is I in the preparation of ASP program a little experience, deficiencies please correct me!