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* add: fdb_conf service * update: do not include fdb_conf service by default * update: add license header * update: add license header * fix: ignore directories without tests * update: move services/fdb_conf under services/fdb * fix: remove all references to fdb_conf * fix: lincese + go.sum
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| /* Copyright (c) 2019 Snowflake Inc. All rights reserved. | ||
| Licensed under the Apache License, Version 2.0 (the | ||
| "License"); you may not use this file except in compliance | ||
| with the License. You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, | ||
| software distributed under the License is distributed on an | ||
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| KIND, either express or implied. See the License for the | ||
| specific language governing permissions and limitations | ||
| under the License. | ||
| */ | ||
|
|
||
| package server | ||
|
|
||
| import ( | ||
| "context" | ||
| "io/ioutil" | ||
| "os" | ||
|
|
||
| "github.com/Snowflake-Labs/sansshell/services" | ||
| pb "github.com/Snowflake-Labs/sansshell/services/fdb" | ||
| "google.golang.org/grpc" | ||
| "google.golang.org/grpc/codes" | ||
| "google.golang.org/grpc/status" | ||
| "google.golang.org/protobuf/types/known/emptypb" | ||
| "gopkg.in/ini.v1" | ||
| ) | ||
|
|
||
| // TODO add section name validator https://apple.github.io/foundationdb/configuration.html#foundationdb-conf | ||
|
|
||
| type cserver struct { | ||
| } | ||
|
|
||
| func (s *cserver) Read(_ context.Context, req *pb.ReadRequest) (*pb.FdbConfResponse, error) { | ||
| cfg, err := ini.Load(req.Location.File) | ||
| if err != nil { | ||
| return nil, status.Errorf(codes.Internal, "could not load config file %s: %v", req.Location.File, err) | ||
| } | ||
|
|
||
| value := cfg.Section(req.Location.Section).Key(req.Location.Key).String() | ||
|
|
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| return &pb.FdbConfResponse{Value: value}, nil | ||
| } | ||
|
|
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| func (s *cserver) Write(_ context.Context, req *pb.WriteRequest) (*emptypb.Empty, error) { | ||
| section := req.Location.Section | ||
| if section == "" { | ||
| return nil, status.Error(codes.InvalidArgument, "section name can not be empty") | ||
| } | ||
|
|
||
| sectionKey := req.Location.Key | ||
| if sectionKey == "" { | ||
| return nil, status.Error(codes.InvalidArgument, "key name can not be empty") | ||
| } | ||
|
|
||
| sectionKeyVal := req.Value | ||
| // For now, disallow empty values since there are not usecases for that. | ||
| // But maybe, in the future, key = "" will be valid config, just not now | ||
| if sectionKeyVal == "" { | ||
| return nil, status.Error(codes.InvalidArgument, "key value can not be empty") | ||
| } | ||
|
|
||
| cfg, err := ini.Load(req.Location.File) | ||
| if err != nil { | ||
| return nil, status.Errorf(codes.Internal, "could not load config file %s: %v", req.Location.File, err) | ||
| } | ||
|
|
||
| cfg.Section(section).Key(sectionKey).SetValue(sectionKeyVal) | ||
|
|
||
| if err = atomicSaveTo(cfg, req.Location.File); err != nil { | ||
| return nil, status.Errorf(codes.Internal, "could not save config file %s: %v", req.Location.File, err) | ||
| } | ||
|
|
||
| return &emptypb.Empty{}, nil | ||
| } | ||
|
|
||
| func (s *cserver) Delete(_ context.Context, req *pb.DeleteRequest) (*emptypb.Empty, error) { | ||
| section := req.Location.Section | ||
| if section == "" { | ||
| return nil, status.Error(codes.InvalidArgument, "section name can not be empty") | ||
| } | ||
|
|
||
| cfg, err := ini.Load(req.Location.File) | ||
| if err != nil { | ||
| return nil, status.Errorf(codes.Internal, "could not load config file %s: %v", req.Location.File, err) | ||
| } | ||
|
|
||
| sectionKey := req.Location.Key | ||
| if sectionKey != "" { | ||
| cfg.Section(section).DeleteKey(sectionKey) | ||
| } | ||
| // TODO maybe use a sentinel for section deletion to avoid accidents? | ||
| if sectionKey == "" { | ||
| cfg.DeleteSection(section) | ||
| } | ||
|
|
||
| if err = atomicSaveTo(cfg, req.Location.File); err != nil { | ||
| return nil, status.Errorf(codes.Internal, "could not save config file %s: %v", req.Location.File, err) | ||
| } | ||
|
|
||
| return &emptypb.Empty{}, nil | ||
| } | ||
|
|
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| func (s *cserver) Register(gs *grpc.Server) { | ||
| pb.RegisterConfServer(gs, s) | ||
| } | ||
|
|
||
| func init() { | ||
| services.RegisterSansShellService(&server{}) | ||
| } | ||
|
|
||
| func atomicSaveTo(f *ini.File, filename string) error { | ||
| tf, err := ioutil.TempFile("", "fdb_conf") | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer tf.Close() | ||
|
|
||
| tfilename := tf.Name() | ||
| defer os.Remove(tfilename) | ||
|
|
||
| if err = f.SaveTo(tfilename); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return os.Rename(tfilename, filename) | ||
| } |
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