Parse string for specific substring?-CodePudding

I have a file with n amount of strings like this:

something.other.com - - [01/Jul/1995:00:00:12 -0400] "GET /images/logosmall.gif HTTP/1.0" 304 0

I need to parse *.gif and HTTP status only - 304

My approach is either first split the string into string arrays and look at the exact index. 6 for the path, 8 for status code. Then search 6 for .gif and copy the point from the last /. Or simply search for .gif in the whole string, make a new subtring from the begininng until the .gif then get substring from the last / It's not clean. Is there a regex expression for something like /*.gif that'll pick up logosmall.gif?

CodePudding user response：

Regex

[^/] \.gif

One or many characters that are not forward slash, followed by the literal ".gif"

This site offers interactive tutorials to learn regex https://regexone.com/lesson/introduction_abcs

If this is not what you are looking for or you would like to know more, please comment on this answer or add to your question.

CodePudding user response：

For the String provided:

String a = "something.other.com - - [01/Jul/1995:00:00:12 -0400] \"GET /images/logosmall.gif HTTP/1.0\" 304 0";
String imageFile = a.replaceAll(".(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)", "").replace("\"", "").split("\\s ")[1].replaceAll("/.*/", "");
String status = a.split("\"\\s*")[2].split("\\s ")[0];

System.out.println("File Name:   -> "   imageFile);
System.out.println("HTTP Status: -> "   status);

For an explanation of the regular expressions used, copy/paste each one (without the outer quotation marks) into regex101.com.

The Console Window will display:

File Name:   -> logosmall.gif
HTTP Status: -> 304