github.com/splucs/witchcraft-go-server@v1.7.0/rest/errors.go (about)

     1  // Copyright (c) 2018 Palantir Technologies. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package rest
    16  
    17  import (
    18  	werror "github.com/palantir/witchcraft-go-error"
    19  )
    20  
    21  const (
    22  	httpStatusCodeParamKey = "httpStatusCode"
    23  )
    24  
    25  type errorMetadata struct {
    26  	statusCode int
    27  }
    28  
    29  type ErrorParam interface {
    30  	apply(error *errorMetadata)
    31  }
    32  
    33  type errorParamFunc func(metadata *errorMetadata)
    34  
    35  func (f errorParamFunc) apply(err *errorMetadata) {
    36  	f(err)
    37  }
    38  
    39  func NewError(err error, params ...ErrorParam) error {
    40  	e := errorMetadata{}
    41  	for _, param := range params {
    42  		param.apply(&e)
    43  	}
    44  	return werror.Wrap(err, "witchcraft-server rest error", werror.SafeParam(httpStatusCodeParamKey, e.statusCode))
    45  }
    46  
    47  func StatusCode(code int) ErrorParam {
    48  	return errorParamFunc(func(err *errorMetadata) {
    49  		err.statusCode = code
    50  	})
    51  }