github.com/aacfactory/fns@v1.2.86-0.20240310083819-80d667fc0a17/clusters/proxy/shareds.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  	"bytes"
    22  	"github.com/aacfactory/errors"
    23  	"github.com/aacfactory/fns/commons/signatures"
    24  	"github.com/aacfactory/fns/shareds"
    25  	"github.com/aacfactory/fns/transports"
    26  )
    27  
    28  var (
    29  	sharedHandlerPath = append(handlerPathPrefix, []byte("/clusters/shared")...)
    30  	sharedHeader      = []byte("X-Fns-Shared")
    31  )
    32  
    33  type ClientFetcher func() transports.Client
    34  
    35  func NewShared(client ClientFetcher, signature signatures.Signature) shareds.Shared {
    36  	return &Shared{
    37  		lockers: shareds.LocalLockers(),
    38  		store: &Store{
    39  			client:    client,
    40  			signature: signature,
    41  		},
    42  	}
    43  }
    44  
    45  type Shared struct {
    46  	lockers shareds.Lockers
    47  	store   shareds.Store
    48  }
    49  
    50  func (shared *Shared) Construct(_ shareds.Options) (err error) {
    51  	return
    52  }
    53  
    54  func (shared *Shared) Lockers() (lockers shareds.Lockers) {
    55  	lockers = shared.lockers
    56  	return
    57  }
    58  
    59  func (shared *Shared) Store() (store shareds.Store) {
    60  	store = shared.store
    61  	return
    62  }
    63  
    64  func (shared *Shared) Close() {}
    65  
    66  // +-------------------------------------------------------------------------------------------------------------------+
    67  
    68  func NewSharedHandler(shared shareds.Shared) transports.Handler {
    69  	return &SharedHandler{
    70  		store: NewSharedStoreHandler(shared.Store()),
    71  	}
    72  }
    73  
    74  type SharedHandler struct {
    75  	store transports.Handler
    76  }
    77  
    78  func (handler *SharedHandler) Handle(w transports.ResponseWriter, r transports.Request) {
    79  	kind := r.Header().Get(sharedHeader)
    80  	if bytes.Equal(kind, sharedHeaderStoreValue) {
    81  		handler.store.Handle(w, r)
    82  	} else {
    83  		w.Failed(errors.Warning("fns: X-Fns-Shared is required"))
    84  	}
    85  	return
    86  }