github.com/greenpau/go-authcrunch@v1.0.50/pkg/authn/respond_json.go (about)

     1  // Copyright 2022 Paul Greenberg greenpau@outlook.com
     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 authn
    16  
    17  import (
    18  	"context"
    19  	"encoding/json"
    20  	"github.com/greenpau/go-authcrunch/pkg/requests"
    21  	addrutil "github.com/greenpau/go-authcrunch/pkg/util/addr"
    22  	"go.uber.org/zap"
    23  	"net/http"
    24  	"strings"
    25  	"time"
    26  )
    27  
    28  // AccessDeniedResponse is the access denied response.
    29  type AccessDeniedResponse struct {
    30  	Error     bool   `json:"error,omitempty" xml:"error,omitempty" yaml:"error,omitempty"`
    31  	Message   string `json:"message,omitempty" xml:"message,omitempty" yaml:"message,omitempty"`
    32  	Timestamp string `json:"timestamp,omitempty" xml:"timestamp,omitempty" yaml:"timestamp,omitempty"`
    33  }
    34  
    35  func newAccessDeniedResponse(msg string) *AccessDeniedResponse {
    36  	return &AccessDeniedResponse{
    37  		Error:     true,
    38  		Message:   msg,
    39  		Timestamp: time.Now().UTC().Format(time.RFC3339Nano),
    40  	}
    41  }
    42  
    43  func (p *Portal) handleJSONErrorWithLog(ctx context.Context, w http.ResponseWriter, r *http.Request, rr *requests.Request, code int, msg string) error {
    44  	p.logger.Warn(
    45  		"Access denied",
    46  		zap.String("session_id", rr.Upstream.SessionID),
    47  		zap.String("request_id", rr.ID),
    48  		zap.String("error", msg),
    49  	)
    50  	switch code {
    51  	case http.StatusBadRequest:
    52  		return p.handleJSONError(ctx, w, code, "Bad Request")
    53  	case http.StatusForbidden:
    54  		return p.handleJSONError(ctx, w, code, "Forbidden")
    55  	case http.StatusInternalServerError:
    56  		return p.handleJSONError(ctx, w, code, "Internal Server Error")
    57  	}
    58  	return p.handleJSONError(ctx, w, code, "Access denied")
    59  }
    60  
    61  func (p *Portal) handleJSONError(ctx context.Context, w http.ResponseWriter, code int, msg string) error {
    62  	resp := newAccessDeniedResponse(msg)
    63  	respBytes, _ := json.Marshal(resp)
    64  	w.WriteHeader(code)
    65  	w.Write(respBytes)
    66  	return nil
    67  }
    68  
    69  func (p *Portal) handleJSON(ctx context.Context, w http.ResponseWriter, r *http.Request, rr *requests.Request) error {
    70  	p.disableClientCache(w)
    71  	p.injectSessionID(ctx, w, r, rr)
    72  	w.Header().Set("Content-Type", "application/json")
    73  	p.logger.Debug(
    74  		"Received JSON API request",
    75  		zap.String("session_id", rr.Upstream.SessionID),
    76  		zap.String("request_id", rr.ID),
    77  		zap.String("url_path", r.URL.Path),
    78  		zap.String("source_address", addrutil.GetSourceAddress(r)),
    79  	)
    80  
    81  	usr, err := p.authorizeRequest(ctx, w, r, rr)
    82  	if err != nil {
    83  		return p.handleJSONErrorWithLog(ctx, w, r, rr, http.StatusUnauthorized, err.Error())
    84  	}
    85  
    86  	switch {
    87  	case strings.Contains(r.URL.Path, "/login"):
    88  		return p.handleJSONLogin(ctx, w, r, rr)
    89  	case strings.Contains(r.URL.Path, "/whoami"):
    90  		return p.handleJSONWhoami(ctx, w, r, rr, usr)
    91  	case strings.Contains(r.URL.Path, "/beacon"):
    92  		return p.handleJSONBeacon(ctx, w, r, rr, usr)
    93  	}
    94  
    95  	if usr != nil {
    96  		p.logger.Debug(
    97  			"No route found",
    98  			zap.String("session_id", rr.Upstream.SessionID),
    99  			zap.String("request_id", rr.ID),
   100  			zap.Any("user", usr.Claims),
   101  		)
   102  		return p.handleJSONError(ctx, w, http.StatusBadRequest, "Bad Request")
   103  	}
   104  	return p.handleJSONError(ctx, w, http.StatusUnauthorized, "Access denied")
   105  }