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Question

I am using python bleach library to sanitize the data entered by the user on a webpage. What I am doing is get user data, clean it using bleach clean and compare if cleaned data is different than original user data, if it is then throw a warning to the user to fix it.But I am facing an issue where If a user enters some data in a text area with a carriage return bleach.clean removes \\r in the original text and my comparison fails.

For example:

If user enters abc (clicks enter) def

When we parse the html text box we get abc\\r\\ndef

and after bleach.clean() I am getting abc\\ndef

I don't mind a carriage return in user input , but for some reason bleach is cleaning it, how do I prevent that?

Answer 1

You can pre-sanitize the input before sending it to bleach by removing all carriage-returns . That should solve your problem. Here are some example use cases:

string.translate Example:

from string import maketrans   # Required to call maketrans function.

intab = "aeiou"
outtab = "12345"
trantab = maketrans(intab, outtab)

str = "this is string example....wow!!!"
print str.translate(trantab)

string.translate Output:

th3s 3s str3ng 2x1mpl2....w4w!!!

string.replace Example:

str = "this is string example....wow!!! this is really string";
print str.replace("is", "was");

string.replace Output:

thwas was string example....wow!!! thwas was really string

Edit: You can also try overriding the tags kwarg while using bleach.clean

Also you can check below for more information:

• Python docs string.translate
• Python docs string.replace
• bleach.clean docs