Text Conversion Chain

This servlet is a collection of text converters.

Just as you chain commands with pipe in a UNIX shell to pass inputs around, you can apply multiple converters to the source string one by one.

Example

Let's decode this Base64 text.

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

1. Copy the above text into the text box.
2. Choose "Base64 → Text (UTF-8)" from the first pull-down menu.
3. Choose "Visualize control codes" from the second pull-down menu.
4. Press Convert.

This is the result.

Environment

• Java 8 or higher
• Tomcat 8.5 or higher

Build and Deploy

Use maven to build the application and tcc.war will be generated.

For tomcat, copy tcc.war into webapps directory.

Usage

1. Enter the source string that needs conversion (up to 4000 bytes, but customizable in web.xml.)
2. Choose converters to apply from the pull down menus.
3. Press 'convert' button.
4. The results will be shown in the right column of the table.

Text Formats

Value Type	Format
Date/Time	y/M/d H:m:s (See Customizations below.)
Date/Time (microsecond)	y/M/d H:m:s.nnnnnn (See Customizations below.)
Hexadecimal	Should not be prefixed with "0x". Use the "Remove 0x" converter to remove it from source.

Converters

Conveter	Description
text → base64	Encode UTF-8 string using BASE64 encoder.
base64 → text (ISO-2022-JP)	Decode BASE64 string and interpret as ISO-2022-JP encoding.
base64 → text (UTF-8)	Decode BASE64 string and interpret as UTF-8 encoding.
lower case → upper case	Convert lower case characters to upper case.
upper case → lower case	Convert upper case characters to lower case.
hex → decimal	Convert a hexadecimal number to a decimal number. Source number must not have 0x prefix.
decimal → hex	Convert a decimal number to a hexadecimal number.
hex (character codes) → UTF-8 text	Treat a hexadecimal string as UTF-8 character codes and translate into a UTF-8 string.
UTF-8 text → hex (character codes)	Convert UTF-8 encoded string into its hexadecimal representation.
Remove 0x	Remove all "0x" from source string.
Encode non-hexadecimal chars	Convert characters into UTF-8 codes. 0-9, A-F, and a-f remain as they are.
text → HTML entity reference	Encode space, <, >, " and & into HTML character entity reference like "&nbsp;".
Entity references → bytes	Decode entity references like "&#nnn;" and "&#xnnn;" into bytes (minus sign can be used).
Visualize control codes	Visualize control codes like CR, LF, TAB.
Remove control codes	Remove control codes like CR, LF, TAB.
Seconds → Minutes:Seconds	Convert seconds to minutes:seconds
Seconds → Hours:Minutes:Seconds	Convert seconds to hours:minutes:seconds
Seconds → Days+Hours:Minutes:Seconds	Convert seconds to days+hours:minutes:seconds
unix clock → UTC date-time	Convert Unix epoch integer into UTC date-time string.
unix clock → local date-time	Convert Unix epoch integer into local date-time string.
unix clock (millisec) → UTC date-time	Convert Unix epoch integer with millisecond into UTC date-time string.
unix clock (millisec) → Local date-time	Convert Unix epoch integer with millisecond into Local date-time string.
unix clock (microsec) → UTC date-time	Convert Unix epoch integer with microsecond into UTC date-time string.
unix clock (microsec) → local date-time	Convert Unix epoch integer with microsecond into local date-time string.
UTC date-time → unix clock	Convert UTC date-time string into Unix epoch integer.
local date-time → unix clock	Convert local date-time string into Unix epoch integer.
UTC date-time (millisec) → unix clock	Convert UTC date-time string with millisecond into Unix epoch integer.
Local date-time (millisec) → unix clock	Convert Local date-time string with millisecond into Unix epoch integer.
UTC date-time (microsec) → unix clock	Convert UTC date-time string with microsecond into Unix epoch integer.
local date-time (microsec) → unix clock	Convert local date-time string with microsecond into Unix epoch integer.
FQDN → IPv4 (DNS lookup)	Perform DNS lookup to get an IPv4 address for FQDN.
little endian → IPv4	Convert little-endian hexadecimal string into IPv4 address.
big endian → IPv4	Convert big-endian hexadecimal string into IPv4 address.
IPv4 → big endian	Convert an IPv4 address into big-endian hexadecimal striing.
URL encoded (UTF-8) → text	Decode URL-encoded string. % encoded codes are interpreted as UTF-8.
URL encoded (SJIS) → text	Decode URL-encoded string. % encoded codes are interpreted as SJIS.
URL encoded (EUC-JP) → text	Decode URL-encoded string. % encoded codes are interpreted as EUC-JP.
URL encoded (ISO-2022-JP) → text	Decode URL-encoded string. % encoded codes are interpreted as ISO-2022-JP.
text → URL encode (UTF-8)	URL-encode string using UTF-8 character encoding.
text → URL encode (SJIS)	URL-encode string using SJIS character encoding.
text → URL encode (EUC-JP)	URL-encode string using EUC-JP character encoding.
text → URL encode (ISO-2022-JP)	URL-encode string using ISO-2022-JP character encoding.
Modified UTF-7 (IMAP) → text	Decode modified UTF-7 (IMAP) string to text
text → Modified UTF-7 (IMAP)	Encode text to modified UTF-7 format (IMAP)

* "local date-time" is interpreted according to the server's time zone.

Customizations

web.xml

Several parameters are defined in web.xml. They can be changed if required.

Parameter	Default Value	Description
converterList	converters.txt	Converters shown in the pull-down menus are defined in this text file.
dateTimeFormat	y/M/d H:m:s	Date and time format for parsing and printing. See here for details.
numConverters	10	The number of converters (pull-down menus) to show in the conversion table.
postDataLimit	4000	The number of bytes that can be entered as the source text.

Rearranging Converters

Converters shown in a pull-down menu can be customized without code change. They are defined in the "converters.txt" file.

This file lists all the converter class names, which are instantiated in the order defined in this file when the servlet is initialized.

If you do not need certain converters, just remove them from the file. For example, local date-time converters will be redundant if this application is deployed in UTC time zone.

Enhancements

In order to add a converter to the program:

1. Create a converter class by inheriting from nx.domain.tcc.AbstractConverter and put it below nx.domain.tcc.converters.
2. Implement a no-argument constructor for your new converter class. This will be the only constructor invoked because of the way it is instantiated.
3. Write something for the shortHelp field in the constructor. This will appear in the usage link (usage.jsp).
4. Implement convert() method that performs conversion.
5. Insert your converter's class name to src/main/webapp/converters.txt.
6. Build and deploy!