Haskell: Remove html character entities in a strin

Question

I'm looking to take a string containing html character entities such as   etc and replace them with the literal string characters. I'm getting data via twitter's api and the text contains those entities. Anyone know of an existing library which does this?

Thanks for your help!

Answer 1

Hello try the code below it will work out

labelTR = labelTR.replace(/(?: |")/g,'');

Answer 2

The Web.Encodings package on hackage looks promising (the decodeHtml function):

http://hackage.haskell.org/packages/archive/web-encodings/0.3.0.2/doc/html/Web-Encodings.html

Answer 3

I built the following function with functions from the package tagsoup. It handles all named and numeric entities from the HTML5 Standard (more than 2000, see the list).

import   qualified          Text.HTML.TagSoup as TS

decodeHTMLentities :: (StringLike str, Show str) => str -> str   
decodeHTMLentities s = TS.fromTagText $ head $ TS.parseTags s

StringLike has instances for String, Lazy and Strict ByteString and Text.

Unknown entites will be left intact. If you want a warning about unknown entities use:

> parseTagsOptions parseOptions{optTagWarning=True} "&asdasd;"
[TagText "&asdasd;",TagWarning "Unknown entity: asdasd"]