github.com/go-kivik/kivik/v4@v4.3.2/x/fsdb/cdb/errors.go (about)

     1  // Licensed under the Apache License, Version 2.0 (the "License"); you may not
     2  // use this file except in compliance with the License. You may obtain a copy of
     3  // the License at
     4  //
     5  //  http://www.apache.org/licenses/LICENSE-2.0
     6  //
     7  // Unless required by applicable law or agreed to in writing, software
     8  // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
     9  // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    10  // License for the specific language governing permissions and limitations under
    11  // the License.
    12  
    13  package cdb
    14  
    15  import (
    16  	"errors"
    17  	"net/http"
    18  	"os"
    19  )
    20  
    21  var (
    22  	errNotFound         = statusError{status: http.StatusNotFound, error: errors.New("missing")}
    23  	errUnrecognizedFile = errors.New("unrecognized file")
    24  	errConflict         = statusError{status: http.StatusConflict, error: errors.New("document update conflict")}
    25  )
    26  
    27  // missing transforms a NotExist error into a standard CouchDBesque 'missing'
    28  // error. All other values are passed through unaltered.
    29  func missing(err error) error {
    30  	if !os.IsNotExist(err) {
    31  		return err
    32  	}
    33  	return errNotFound
    34  }
    35  
    36  func kerr(err error) error {
    37  	if err == nil {
    38  		return nil
    39  	}
    40  	if errors.Is(err, &statusError{}) {
    41  		// Error has already been converted
    42  		return err
    43  	}
    44  	if os.IsNotExist(err) {
    45  		return statusError{status: http.StatusNotFound, error: err}
    46  	}
    47  	if os.IsPermission(err) {
    48  		return statusError{status: http.StatusForbidden, error: err}
    49  	}
    50  	return err
    51  }
    52  
    53  type statusError struct {
    54  	error
    55  	status int
    56  }
    57  
    58  func (e statusError) Unwrap() error   { return e.error }
    59  func (e statusError) HTTPStatus() int { return e.status }