feat: support inbound plugin jsonschema validator

[cchenggit]

issue #227

[codecov]

Codecov Report

❌ Patch coverage is 85.34483% with 17 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
plugins/jsonschema_validator/plugin.go	81.48%	9 Missing and 6 partials ⚠️
...gins/jsonschema_validator/jsonschema/jsonschema.go	87.50%	1 Missing and 1 partial ⚠️

Flag	Coverage Δ
integration	79.00% <85.34%> (+0.27%)	⬆️
unit	13.33% <14.65%> (+0.05%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
plugins/plugins.go	100.00% <100.00%> (ø)
proxy/gateway.go	77.90% <ø> (ø)
utils/hash.go	100.00% <100.00%> (ø)
utils/validate.go	85.52% <100.00%> (+3.26%)	⬆️
...gins/jsonschema_validator/jsonschema/jsonschema.go	87.50% <87.50%> (ø)
plugins/jsonschema_validator/plugin.go	81.48% <81.48%> (ø)

... and 2 files with indirect coverage changes

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[vm-001]

• default_schema: to be used when event_type is not defined in the schemas
• version: define the jsonschema dialect version

[vm-001]

Requires a version field. (enum: draft4/draft6/draft7/etc..)

[cchenggit]

current jsonschema only support openapi3 schema, which based on the draft6

[vm-001]

why not use string? (draft4, draft6, draft202012)

[cchenggit]

let's use string value but simplify the version number
draft: 4/6/7/2019-09/2020-12

[vm-001]

I think we can design a feature to support loading values from external system(including file, env, and network), this would be a different topic. Let's remove the part of loading schema from the file and network to keep the plugin as simple as possible.

[cchenggit]

I think we can design a feature to support loading values from external system(including file, env, and network), this would be a different topic. Let's remove the part of loading schema from the file and network to keep the plugin as simple as possible.

good idea, this should the common requirement of plugin

[vm-001]

Please update the README.md to mention this cool plugin.

[vm-001]

Suggested change

fmt.Print(string(resp.Body()))

[vm-001]

Don't forget the plugin documentation (see https://docs.webhookx.io/docs/plugin/function/).

It would be great if we had a blog post introducing this awesome plugin!