github.com/aacfactory/fns@v1.2.86-0.20240310083819-80d667fc0a17/clusters/proxy/command.go (about)

     1  /*
     2   * Copyright 2023 Wang Min Xiang
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   * 	http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   *
    16   */
    17  
    18  package proxy
    19  
    20  import (
    21  	"github.com/aacfactory/errors"
    22  	"github.com/aacfactory/fns/commons/signatures"
    23  	"github.com/aacfactory/fns/transports"
    24  	"github.com/aacfactory/json"
    25  )
    26  
    27  type Command struct {
    28  	Command string          `json:"command"`
    29  	Payload json.RawMessage `json:"payload"`
    30  }
    31  
    32  func ParseCommand(r transports.Request) (cmd Command, err error) {
    33  	body, bodyErr := r.Body()
    34  	if bodyErr != nil {
    35  		err = errors.Warning("fns: parse proxy command failed").WithCause(bodyErr)
    36  		return
    37  	}
    38  	err = json.Unmarshal(body, &cmd)
    39  	if err != nil {
    40  		err = errors.Warning("fns: parse proxy command failed").WithCause(err)
    41  		return
    42  	}
    43  	return
    44  }
    45  
    46  func encodeCommand(cmd Command, signature signatures.Signature) (body []byte, sign []byte, err error) {
    47  	body, err = json.Marshal(cmd)
    48  	if err != nil {
    49  		err = errors.Warning("fns: encode proxy command failed").WithCause(err)
    50  		return
    51  	}
    52  	sign = signature.Sign(body)
    53  	return
    54  }