[ISSUE #4290] queryWebHookConfigByManufacturer endpoint causes NPE and unable to response

[Pil0tXia]

Fixes #4290.

Motivation

1. Can not get webHookConfig from node because there is no webHookConfig in node.

2. pageSize and pageNum are required, but they are missing from the document.

Modifications

Fix code and document:

Documentation

• Does this pull request introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)
• If a feature is not applicable for documentation, explain why?
• If a feature is not documented yet in this PR, please create a followup issue for adding the documentation

[codecov]

Codecov Report

Merging #4291 (332268e) into master (c18ef05) will not change coverage.
Report is 1 commits behind head on master.
The diff coverage is 0.00%.

❗ Current head 332268e differs from pull request most recent head b963cc9. Consider uploading reports for the commit b963cc9 to get more accurate results

@@            Coverage Diff            @@
##             master    #4291   +/-   ##
=========================================
  Coverage     16.87%   16.87%           
  Complexity     1426     1426           
=========================================
  Files           593      593           
  Lines         26068    26068           
  Branches       2396     2396           
=========================================
  Hits           4398     4398           
  Misses        21229    21229           
  Partials        441      441           

Files Changed	Coverage Δ
...ndler/QueryWebHookConfigByManufacturerHandler.java	28.57% <0.00%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

I have a new question.

[pandaapo]

I am confused how the field cloudEventIdGenerateMode value is generated after JsonUtils.parseObject(node.toString(), WebHookConfig.class).

[Pil0tXia]

@pandaapo This field has a default value in WebHookConfig constructor~