CODEWITHSUNDEEP
javaregex
MrMr
MrMr

Reputation: 493

Regex to Find Anything Between Multiple Delimiters

I'm attempting to match anything between different delimiters, using a Java based regex engine/interpreter. The text I'm after is the server.domain.com I do not believe I can use any Java either, only a regular expression. The log will only have one OR the other, never both. This must be accomplished with a single regex, or the application will have to be re-written.

Examples of the logs:

Host = server.domain.com|

OR

Host="server.domain.com"

Thus far I've tried the following, along with a number of other combinations...

Host="(.*?)"|Host\s=\s(.*?)\|

I must also use Host as part of the delimiter, as it is parsing out of a log with many other similar pieces.

Thanks for any help on this!

Upvotes: 0

Views: 1072

Answers (3)

MrMr
MrMr

Reputation: 493

Thanks to aliteral mind, I learned about non capture groups and that was key...

Behold!...

Host(?:\s=\s|=\")(.*?)(?:\||\")

Upvotes: 0

Braj
Braj

Reputation: 46841

Try this one with both the string

    String str1 = "Host = server.domain.com|";
    String str2 = "Host=\"server.domain.com\"";

    //Host(no or one space)=(" or one space)server.domain.com(| or ")
    Pattern p = Pattern.compile("Host\\s?=[\\\"|\\s]server.domain.com[\\||\\\"]");
    Matcher m = p.matcher(str1);
    if (m.find()) {
        System.out.println("found");
    }

You can try this one also if no of spaces are not known on either side of equal to.

//Host(zero or more spaces)=(zero or more spaces)(" or spaces)server.domain.com(" or |)
Pattern p = Pattern.compile("Host\\s*=\\s*[\\\"|\\s*]server.domain.com[\\\"|\\|]");

Upvotes: 0

dognose
dognose

Reputation: 20899

For the example given, you could use:

^Host\s*=\s*(?:")?(?:[^|"])+[|"]$

Regular expression visualization

Debuggex Demo

it will also accept

host=server.domain.com"

but if the logs are either / or that shouldn't be an issue.

Upvotes: 1

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