正则表达式匹配精确的字符串-进入循环

Question

Need help in solving this regex issues, I am stuck at, and not able to solve. I am using nodejs 6.10

For example following are the incoming patterns

• test
• test123
• test/

I need help creating a regex match so -
- only test is matched , and not test123 or test/ or
- for test123, it shall not prematch at test

Presently I am using the following rules for redirect

‘^/test /test-videos.html [R=302,L]’  
'^/test/ /test/videos.html [R=302,L]’  
'^/test123 /test/test-videos.html [R=302,L]’

GET www.domain.com/test
It matches test and return 302 on /test-videos.html
on 302 when the request reaches for /test-videos.html again at the server
test is matched again, and a 302 is returned with /test-videos.html-videos.html,
and again the same on that request, so it gets into an unending loop of
/test-videos.html-videos.html-videos.html
/test-videos.html-videos.html-videos.html-videos.html-videos.html-videos.html-videos.html-videos.html-videos.html

Need help with an expression which matches test with nothing succeeding it.

Answer 1

You can use the $ to match the end of the string, eg '^test$'

Check out http://regular-expressions.mobi/anchors.html?wlr=1

Answer 2

You are nearly there. You have the ^ for matching the start of the string. You just need to add a $ to match the end of an input after the test . From the Regex guide in MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#special-dollar

$ Matches end of input. If the multiline flag is set to true, also matches immediately before a line break character. For example, /t$/ does not match the 't' in "eater", but does match it in "eat".

 const testRegex = /^test$/; const justTest = testRegex.test('test'); const trailingSlash = testRegex.test('test/'); const numbers = testRegex.test('test123'); console.log('match test', justTest) console.log('trailing slash', trailingSlash) console.log('numbers', numbers)