github.com/google/martian/v3@v3.3.3/auth/context.go (about)

     1  // Copyright 2015 Google Inc. 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 auth
    16  
    17  import (
    18  	"sync"
    19  
    20  	"github.com/google/martian/v3"
    21  )
    22  
    23  const key = "auth.Context"
    24  
    25  // Context contains authentication information.
    26  type Context struct {
    27  	mu  sync.RWMutex
    28  	id  string
    29  	err error
    30  }
    31  
    32  // FromContext retrieves the auth.Context from the session.
    33  func FromContext(ctx *martian.Context) *Context {
    34  	if v, ok := ctx.Session().Get(key); ok {
    35  		return v.(*Context)
    36  	}
    37  
    38  	actx := &Context{}
    39  	ctx.Session().Set(key, actx)
    40  
    41  	return actx
    42  }
    43  
    44  // ID returns the ID.
    45  func (ctx *Context) ID() string {
    46  	ctx.mu.RLock()
    47  	defer ctx.mu.RUnlock()
    48  
    49  	return ctx.id
    50  }
    51  
    52  // SetID sets the ID.
    53  func (ctx *Context) SetID(id string) {
    54  	ctx.mu.Lock()
    55  	defer ctx.mu.Unlock()
    56  
    57  	ctx.err = nil
    58  
    59  	if id == "" {
    60  		return
    61  	}
    62  
    63  	ctx.id = id
    64  }
    65  
    66  // SetError sets the error and resets the ID.
    67  func (ctx *Context) SetError(err error) {
    68  	ctx.mu.Lock()
    69  	defer ctx.mu.Unlock()
    70  
    71  	ctx.id = ""
    72  	ctx.err = err
    73  }
    74  
    75  // Error returns the error.
    76  func (ctx *Context) Error() error {
    77  	ctx.mu.RLock()
    78  	defer ctx.mu.RUnlock()
    79  
    80  	return ctx.err
    81  }