Server.HTMLEncode usage in ASP (with custom functions)

Server.HTMLEncode definition and usage

The HTMLEncode method applies HTML encoding to a specified string. Mainly for safety reasons.

grammar

Server.HTMLEncode(string)

Example

script:

 <%response.write(Server.HTMLEncode("The image tag: <img>"))%>

Output:

The image tag: <img>

Browser output:

The image tag: <img>

In the writing of asp backend, we often use server.htmlencode all the content input by the user, for example

username=server.htmlencode(request("username"))

Then enter the database again. For security reasons, what users input is the most unreliable.

Below is the custom function of htmlencode

The HTMLEncode() function is a custom function that not only encodes HTML symbols, but also encodes carriage return and line breaks, allowing the content entered in the text box to be output in the original display format.

 function HTMLEncode(fString) fString = replace(fString, "&", "&amp;") fString = replace(fString, """", "&quot;") fString = replace(fString, "'", "&#39;") fString = replace(fString, ">", "&gt;") fString = replace(fString, "< ", "&lt;") fString = replace(fString, "", "&nbsp;") fString = replace(fString, CHR(13), "") fString = replace(fString, CHR(10) & CHR(10), "<p>") fString = replace(fString, CHR(10), "<br />") HTMLEncode = fStringend function

Here you can add the code you need to replace.

HTMLDecode function: It is the inverse function of HTMLEncode function. It displays characters in HTML as is in textarea, which is very useful when modifying information.

 function HTMLDecode(fString) fString = replace(fString,"&gt;",">") fString = replace(fString,"&lt;","<") fString = Replace(fString,"&nbsp;",chr(32)) fString = Replace(fString,"&quot;",chr(34)) fString = Replace(fString,"&#39;",chr(39)) fString = Replace(fString,"",CHR(13)) fString = Replace(fString,"</P><P>",CHR(10)& CHR(10)) fString = Replace(fString,"<BR>",CHR(10)) HTMLDecode = fString

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