How can I encode Reserved Characters that are used for HTML?

The problem occurs when using reserved characters in the HTML request being sent back to the server to retrieve the barcode. Characters such as %, +, and & are reserved for specific purposes, when they are seen in the actual HTML text being sent, and the request for the barcode becomes distorted when these characters are used. A good example is to try to use the plus (+) sign in the encoded data; the barcode returns spaces everywhere the plus (+) sign is encountered. This is due to the HTML processor translating the plus (+) sign into a space.

The recommended work-around according to the W3C is to replace the reserved characters with the percent sign (ironically, this is the reason that the percent sign is a reserved character) and the hexadecimal value associated with the ASCII character. For instance, the hex value for the percent sign is 25; therefore replace all instances of the percent sign with %25.  For the ampersand, the hex value is 26, so replace all instances in the data to encode with %26.  Therefore, if the data string is 1%1&2%07, change the string to 1%251%262%2507.

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Products affected: ASP Barcode Server Component for IIS Advantage Package and Java Barcode Applets, Servlets, JavaBeans and Barcode Class Libraries

See also:

• ASP Barcode Server for IIS
• HTTP 500.100 - Internal Server Error - ASP error - Library not registered.
• "No Image" is displayed after several barcodes are created
• Java Products
• Why do the java.awt libraries require a functional X Server?
• "Can't connect to X window server" or similar errors using servlets
• Product Support Index

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