github.com/go-kivik/kivik/v4@v4.3.2/x/kivikd/authdb/couchauth/couchauth.go (about)

     1  // Licensed under the Apache License, Version 2.0 (the "License"); you may not
     2  // use this file except in compliance with the License. You may obtain a copy of
     3  // the License at
     4  //
     5  //  http://www.apache.org/licenses/LICENSE-2.0
     6  //
     7  // Unless required by applicable law or agreed to in writing, software
     8  // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
     9  // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    10  // License for the specific language governing permissions and limitations under
    11  // the License.
    12  
    13  // Package couchauth provides auth services to a remote CouchDB server.
    14  package couchauth
    15  
    16  import (
    17  	"context"
    18  	"encoding/json"
    19  	"errors"
    20  	"net/http"
    21  	"net/url"
    22  
    23  	"github.com/go-kivik/kivik/v4/couchdb/chttp"
    24  	"github.com/go-kivik/kivik/v4/x/kivikd/authdb"
    25  )
    26  
    27  type client struct {
    28  	*chttp.Client
    29  }
    30  
    31  var _ authdb.UserStore = &client{}
    32  
    33  // New returns a new auth user store, which authenticates users against a remote
    34  // CouchDB server.
    35  func New(dsn string) (authdb.UserStore, error) {
    36  	p, err := url.Parse(dsn)
    37  	if err != nil {
    38  		return nil, err
    39  	}
    40  	if p.User != nil {
    41  		return nil, errors.New("DSN must not contain authentication credentials")
    42  	}
    43  	c, err := chttp.New(&http.Client{}, dsn, nil)
    44  	return &client{c}, err
    45  }
    46  
    47  func (c *client) Validate(ctx context.Context, username, password string) (*authdb.UserContext, error) {
    48  	req, err := c.NewRequest(ctx, http.MethodGet, "/_session", nil, nil)
    49  	if err != nil {
    50  		return nil, err
    51  	}
    52  	req.SetBasicAuth(username, password)
    53  	resp, err := c.Do(req)
    54  	if err != nil {
    55  		return nil, err
    56  	}
    57  	if err = chttp.ResponseError(resp); err != nil {
    58  		return nil, err
    59  	}
    60  	result := struct {
    61  		Ctx struct {
    62  			Name  string   `json:"name"`
    63  			Roles []string `json:"roles"`
    64  		}
    65  	}{}
    66  	defer resp.Body.Close()
    67  	dec := json.NewDecoder(resp.Body)
    68  	if err = dec.Decode(&result); err != nil {
    69  		return nil, err
    70  	}
    71  	return &authdb.UserContext{
    72  		Name:  result.Ctx.Name,
    73  		Roles: result.Ctx.Roles,
    74  		Salt:  "", // FIXME
    75  	}, nil
    76  }
    77  
    78  func (c *client) UserCtx(context.Context, string) (*authdb.UserContext, error) {
    79  	// var result struct {
    80  	// 	Ctx struct {
    81  	// 		Roles []string `json:"roles"`
    82  	// 	} `json:"userCtx"`
    83  	// }
    84  	// return result.Ctx.Roles, c.DoJSON()
    85  	return nil, nil
    86  }