github.com/mendersoftware/go-lib-micro@v0.0.0-20240304135804-e8e39c59b148/rbac/rbac.go (about)

     1  // Copyright 2023 Northern.tech AS
     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  package rbac
    15  
    16  import (
    17  	"context"
    18  	"net/http"
    19  	"strings"
    20  )
    21  
    22  type scopeContextKeyType int
    23  
    24  const (
    25  	scopeContextKey        scopeContextKeyType = 0
    26  	ScopeHeader                                = "X-MEN-RBAC-Inventory-Groups"
    27  	ScopeReleaseTagsHeader                     = "X-MEN-RBAC-Releases-Tags"
    28  )
    29  
    30  type Scope struct {
    31  	DeviceGroups []string
    32  	ReleaseTags  []string
    33  }
    34  
    35  // FromContext extracts current scope from context.Context
    36  func FromContext(ctx context.Context) *Scope {
    37  	val := ctx.Value(scopeContextKey)
    38  	if v, ok := val.(*Scope); ok {
    39  		return v
    40  	}
    41  	return nil
    42  }
    43  
    44  // WithContext adds scope to context `ctx` and returns the resulting context.
    45  func WithContext(ctx context.Context, scope *Scope) context.Context {
    46  	return context.WithValue(ctx, scopeContextKey, scope)
    47  }
    48  
    49  func ExtractScopeFromHeader(r *http.Request) *Scope {
    50  	groupStr := r.Header.Get(ScopeHeader)
    51  	tagsStr := r.Header.Get(ScopeReleaseTagsHeader)
    52  	if len(groupStr) > 0 {
    53  		return &Scope{
    54  			DeviceGroups: strings.Split(groupStr, ","),
    55  			ReleaseTags:  strings.Split(tagsStr, ","),
    56  		}
    57  	}
    58  	return nil
    59  }