vertx / io.vertx.reactivex.ext.web.api.validation / HTTPRequestValidationHandler / addHeaderParamWithPattern

# addHeaderParamWithPattern

`open fun addHeaderParamWithPattern(headerName: String, pattern: String, required: Boolean): HTTPRequestValidationHandler`

Add a header parameter with a custom pattern

### Parameters

`headerName` - expected header name

`pattern` - regular expression for validation

`required` - true if parameter is required

Return
this handler