feat: support hostname target

[ldysdu]

support hostname target

• I hereby agree to the terms of the HertzBeat CLA
• I have read the Contributing Guide
• I have written the necessary doc or comment.
• I have added the necessary unit tests and all cases have passed.

close #1452

[tomsun28]

👍👍 hi, please help us fix the unit test error.

Error:  Failures: 
Error:    IpDomainUtilTest.validateIpDomain:43 expected: <false> but was: <true>
[INFO] 
Error:  Tests run: 37, Failures: 1, Errors: 0, Skipped: 0
[INFO] 

[ldysdu]

updated the test case, improved the regex.
wish you all have a happy new year!

[tomsun28]

@ldysdu Happy New Year!

[tomsun28]

hi, it seem something wrong in Pattern.compile("^[-\w]+(\.[-\w]+)*$");

[INFO] -------------------------------------------------------------
Error: COMPILATION ERROR :
[INFO] -------------------------------------------------------------
Error: /home/runner/work/hertzbeat/hertzbeat/common/src/main/java/org/dromara/hertzbeat/common/util/IpDomainUtil.java:[39,34] illegal escape character
Error: /home/runner/work/hertzbeat/hertzbeat/common/src/main/java/org/dromara/hertzbeat/common/util/IpDomainUtil.java:[39,39] illegal escape character
Error: /home/runner/work/hertzbeat/hertzbeat/common/src/main/java/org/dromara/hertzbeat/common/util/IpDomainUtil.java:[39,43] illegal escape character
[INFO] 3 errors

[hertzbeat]

Bot detected the issue body's language is not English, translate it automatically. 👯👭🏻🧑‍🤝‍🧑👫🧑🏿‍🤝‍🧑🏻👩🏾‍🤝‍👨🏿👬🏿

---

hi, it seem something wrong in Pattern.compile("^[-\w]+(\.[-\w]+)*$");

[INFO] -------------------------------------------------------------
Error: COMPILATION ERROR :
[INFO] -------------------------------------------------------------
Error: /home/runner/work/hertzbeat/hertzbeat/common/src/main/java/org/dromara/hertzbeat/common/util/IpDomainUtil.java:[39,34] illegal escape character
Error: /home/runner/work/hertzbeat/hertzbeat/common/src/main/java/org/dromara/hertzbeat/common/util/IpDomainUtil.java:[39,39] illegal escape character
Error: /home/runner/work/hertzbeat/hertzbeat/common/src/main/java/org/dromara/hertzbeat/common/util/IpDomainUtil.java:[39,43] illegal escape character
[INFO] 3 errors

[ldysdu]

sorry for my poor java skill, and the poor network connection. 😂
a double slash should fix the illegal escape character issue hopefully.

[tomsun28]

@ldysdu No need to apologize, it’s a great job to take the first step contribute 👍

[tomsun28]

LGTM！

[tomsun28]

@all-contributors please add @ldysdu for code

[allcontributors]

@tomsun28

I've put up a pull request to add @ldysdu! 🎉