escaping | 易学教程

Safe html in java

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问题 I have some input containing HTML like <br> <b> <i> etc. I need a way to escape only the "bad" HTML that exposes my site to XSS etc. After hours of Googeling I found the GWT which looks kinda promising. What is the recommended way to escape bad HTML ? Edit: Let me clear things up. I am using a javascript text editor which outputs html. Wouldn't it be much easier if i use something like bbcode? 回答1: Google caja is a tool for making third party HTML, CSS and JavaScript safe to embed in your

CMake quote escape conumdrum

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I just don't seem to be able to wrap my head around CMake's escape rules. Given: set(X A B C) add_custom_target( works COMMAND DUMMY=0 X="${X}" env | grep ^X= COMMENT "This works") add_custom_target( fails COMMAND X="${X}" env | grep ^X= COMMENT "This fails") The intention is to execute command X="A B C" env . The custom target works correctly constructs the command, where as fails incorrectly executes: X=\"A B C\" env ... But why? Florian Actually you ran into two problems: Don't quote CMake variables in custom commands. CMake will do the necessary escape sequences for you. The first literal

Mysql regex error #1139 using literal -

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I tried running this query: SELECT column FROM table WHERE column REGEXP '[^A-Za-z\-\']' but this returns #1139 - Got error 'invalid character range' from regexp which seems to me like the - in the character class is not being escaped, and instead read as an invalid range. Is there some other way that it's suppose to be escaped for mysql to be the literal - ? This regex works as expected outside of mysql, https://regex101.com/r/wE8vY5/1 . I came up with an alternative to that regex which is SELECT column FROM table WHERE column NOT REGEXP '([:alpha:]|-|\')' so the question isn't how do I get

PHP: Work with a large string with quotes

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Suppose I have a large string of HTML code. It has both double quotes and single quotes. How can I work with such a string? I want to assign it to a php var but there's a quote clash whether I use double quotes or single quotes. Is there any way to assign this string to a var without having to manually add slashes to all the quotes? It could be something like this: <div class="name">Sally O'Connel</div> Only the string is longer so there will be multiple occurances of single quotes and double quotes. You could use HEREDOC/NOWDOC : $var = <<<HTML <div class="name">Sally O'Connel</div> HTML;

Escaping backslashes in string

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I would like to know what is a good way to escape back slashes in a string without adding unnecessary slashes to it. I mean, usually if I want to escape a backslash in a string, the simplest way is to use String.Replace() like so: string s = someString.Replace("\\", "\\\\"); A similar thing can be done with regular expressions using Regex.Replace() . Now my question is, lets say I have a string that has some of its back slashes escaped like for example: "C:\some_folder\\some_file.bin" Now if I try and replace the backslashes in that by adding another backslash before each occurrence, I will

Using a BackSlash in Java [duplicate]

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This question already has an answer here: What is the backslash character (\\)? 6 answers I want to print out a backslash. However, I get an error: //Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ ) System.out.println("\"); System.out.println("\\"); \ will escape the second \ character. 来源： https://stackoverflow.com/questions/30781026/using-a-backslash-in-java

What does it mean to call an escaping closure after the function returns? [duplicate]

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This question already has an answer here: Escaping Closures in Swift 5 answers I was reading the apple developer documentation's definition of escaping closures. It says "a closure is said to escape a function when the closure is passed as an argument to the function, but is called after the function returns" I am not sure what the last part is supposed to mean, what does it mean by "after the function returns"? Does it mean "after the function returns a value"? Take for example a call to an API. This call is going to take time, but we are going to want to do something after the call is

How to escape apostrophe in WSO2 property XPath expression

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My problem is to quote the values obtained from get-property('cf') in <property expression="fn:concat(get-property('whereConcat'),' AND PA_INATO=', get-property('cf'))" name="whereConcat" scope="default" type="STRING"/> I have tried in different ways(character encoding: ' , character escape: \' ) but without success. the cleanest way is to define a constant: <property name="apos" scope="default" type="STRING" value="'"/> and then use it as follow: <property expression="fn:concat(get-property('whereConcat'),' AND PA_INATO=',get-property('apos'), get-property('cf'),get-property('apos'))"

Escape dynamic strings in JavaScript

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I'm writing a script for a signature function in a forum program and any time someone puts a quote or some other JavaScript parse-able character into it, it breaks my program. Is there a way either to force JavaScript to recognize it as a string without parsing it as script or, failing that, a function that escapes all scripting within a string that will be dynamic? I did a search and all I could find were endless webpages on how to escape individual characters with a slash - perhaps my search skills need work. Are you putting the contents of the signature using a server-side language,

Escaping square bracket in bash inside a string for an if

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问题 I'm trying to do a simple if statement but one of the string contains square brackets. I've tried with \ ' " + and everything came in my mind. I've basically this: if [ $MESSAGE = "username [$USERNAME] is already taken" ] and in this case I would like to throw an error message. 回答1: Quote $MESSAGE as well. If that variable does contain a [, it will affect the parsing. if [ "$MESSAGE" = "username [$USERNAME] is already taken" ] 来源： https://stackoverflow.com/questions/11419668/escaping-square