github.com/bugraaydogar/snapd@v0.0.0-20210315170335-8c70bb858939/daemon/api_snap_conf.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2015-2020 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package daemon
    21  
    22  import (
    23  	"fmt"
    24  	"net/http"
    25  
    26  	"github.com/snapcore/snapd/client"
    27  	"github.com/snapcore/snapd/jsonutil"
    28  	"github.com/snapcore/snapd/overlord/auth"
    29  	"github.com/snapcore/snapd/overlord/configstate"
    30  	"github.com/snapcore/snapd/overlord/configstate/config"
    31  	"github.com/snapcore/snapd/overlord/state"
    32  	"github.com/snapcore/snapd/snap"
    33  	"github.com/snapcore/snapd/strutil"
    34  )
    35  
    36  var (
    37  	snapConfCmd = &Command{
    38  		Path: "/v2/snaps/{name}/conf",
    39  		GET:  getSnapConf,
    40  		PUT:  setSnapConf,
    41  	}
    42  )
    43  
    44  func getSnapConf(c *Command, r *http.Request, user *auth.UserState) Response {
    45  	vars := muxVars(r)
    46  	snapName := configstate.RemapSnapFromRequest(vars["name"])
    47  
    48  	keys := strutil.CommaSeparatedList(r.URL.Query().Get("keys"))
    49  
    50  	s := c.d.overlord.State()
    51  	s.Lock()
    52  	tr := config.NewTransaction(s)
    53  	s.Unlock()
    54  
    55  	currentConfValues := make(map[string]interface{})
    56  	// Special case - return root document
    57  	if len(keys) == 0 {
    58  		keys = []string{""}
    59  	}
    60  	for _, key := range keys {
    61  		var value interface{}
    62  		if err := tr.Get(snapName, key, &value); err != nil {
    63  			if config.IsNoOption(err) {
    64  				if key == "" {
    65  					// no configuration - return empty document
    66  					currentConfValues = make(map[string]interface{})
    67  					break
    68  				}
    69  				return SyncResponse(&resp{
    70  					Type: ResponseTypeError,
    71  					Result: &errorResult{
    72  						Message: err.Error(),
    73  						Kind:    client.ErrorKindConfigNoSuchOption,
    74  						Value:   err,
    75  					},
    76  					Status: 400,
    77  				}, nil)
    78  			} else {
    79  				return InternalError("%v", err)
    80  			}
    81  		}
    82  		if key == "" {
    83  			if len(keys) > 1 {
    84  				return BadRequest("keys contains zero-length string")
    85  			}
    86  			return SyncResponse(value, nil)
    87  		}
    88  
    89  		currentConfValues[key] = value
    90  	}
    91  
    92  	return SyncResponse(currentConfValues, nil)
    93  }
    94  
    95  func setSnapConf(c *Command, r *http.Request, user *auth.UserState) Response {
    96  	vars := muxVars(r)
    97  	snapName := configstate.RemapSnapFromRequest(vars["name"])
    98  
    99  	var patchValues map[string]interface{}
   100  	if err := jsonutil.DecodeWithNumber(r.Body, &patchValues); err != nil {
   101  		return BadRequest("cannot decode request body into patch values: %v", err)
   102  	}
   103  
   104  	st := c.d.overlord.State()
   105  	st.Lock()
   106  	defer st.Unlock()
   107  
   108  	taskset, err := configstate.ConfigureInstalled(st, snapName, patchValues, 0)
   109  	if err != nil {
   110  		// TODO: just return snap-not-installed instead ?
   111  		if _, ok := err.(*snap.NotInstalledError); ok {
   112  			return SnapNotFound(snapName, err)
   113  		}
   114  		return errToResponse(err, []string{snapName}, InternalError, "%v")
   115  	}
   116  
   117  	summary := fmt.Sprintf("Change configuration of %q snap", snapName)
   118  	change := newChange(st, "configure-snap", summary, []*state.TaskSet{taskset}, []string{snapName})
   119  
   120  	st.EnsureBefore(0)
   121  
   122  	return AsyncResponse(nil, &Meta{Change: change.ID()})
   123  }