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feat: add schema history to graphql (#6324)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| /* | ||
| * Copyright 2017-2020 Dgraph Labs, Inc. and Contributors | ||
| * | ||
| * 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 edgraph | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "time" | ||
|
|
||
| "github.com/dgraph-io/dgo/v200/protos/api" | ||
| "github.com/dgraph-io/ristretto/z" | ||
| "github.com/golang/glog" | ||
| ) | ||
|
|
||
| // ResetCors make the dgraph to accept all the origins if no origins were given | ||
| // by the users. | ||
| func ResetCors(closer *z.Closer) { | ||
| defer func() { | ||
| glog.Infof("ResetCors closed") | ||
| closer.Done() | ||
| }() | ||
|
|
||
| req := &api.Request{ | ||
| Query: `query{ | ||
| cors as var(func: has(dgraph.cors)) | ||
| }`, | ||
| Mutations: []*api.Mutation{ | ||
| { | ||
| Set: []*api.NQuad{ | ||
| { | ||
| Subject: "_:a", | ||
| Predicate: "dgraph.cors", | ||
| ObjectValue: &api.Value{Val: &api.Value_StrVal{StrVal: "*"}}, | ||
| }, | ||
| }, | ||
| Cond: `@if(eq(len(cors), 0))`, | ||
| }, | ||
| }, | ||
| CommitNow: true, | ||
| } | ||
|
|
||
| for closer.Ctx().Err() == nil { | ||
| ctx, cancel := context.WithTimeout(closer.Ctx(), time.Minute) | ||
| defer cancel() | ||
| ctx = context.WithValue(ctx, IsGraphql, true) | ||
| if _, err := (&Server{}).doQuery(ctx, req, NoAuthorize); err != nil { | ||
| glog.Infof("Unable to upsert cors. Error: %v", err) | ||
| time.Sleep(100 * time.Millisecond) | ||
| } | ||
| break | ||
| } | ||
| } | ||
|
|
||
| func generateNquadsForCors(origins []string) []byte { | ||
| out := &bytes.Buffer{} | ||
| for _, origin := range origins { | ||
| out.Write([]byte(fmt.Sprintf("uid(cors) <dgraph.cors> \"%s\" . \n", origin))) | ||
| } | ||
| return out.Bytes() | ||
| } | ||
|
|
||
| // AddCorsOrigins Adds the cors origins to the Dgraph. | ||
| func AddCorsOrigins(ctx context.Context, origins []string) error { | ||
| req := &api.Request{ | ||
| Query: `query{ | ||
| cors as var(func: has(dgraph.cors)) | ||
| }`, | ||
| Mutations: []*api.Mutation{ | ||
| { | ||
| SetNquads: generateNquadsForCors(origins), | ||
| Cond: `@if(eq(len(cors), 1))`, | ||
| DelNquads: []byte(`uid(cors) <dgraph.cors> * .`), | ||
| }, | ||
| }, | ||
| CommitNow: true, | ||
| } | ||
| _, err := (&Server{}).doQuery(context.WithValue(ctx, IsGraphql, true), req, NoAuthorize) | ||
| return err | ||
| } | ||
|
|
||
| // GetCorsOrigins retrive all the cors origin from the database. | ||
| func GetCorsOrigins(ctx context.Context) ([]string, error) { | ||
| req := &api.Request{ | ||
| Query: `query{ | ||
| me(func: has(dgraph.cors)){ | ||
| dgraph.cors | ||
| } | ||
| }`, | ||
| ReadOnly: true, | ||
| } | ||
| res, err := (&Server{}).doQuery(context.WithValue(ctx, IsGraphql, true), req, NoAuthorize) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| type corsResponse struct { | ||
| Me []struct { | ||
| DgraphCors []string `json:"dgraph.cors"` | ||
| } `json:"me"` | ||
| } | ||
| corsRes := &corsResponse{} | ||
| if err = json.Unmarshal(res.Json, corsRes); err != nil { | ||
| return nil, err | ||
| } | ||
| if len(corsRes.Me) != 1 { | ||
| return []string{}, fmt.Errorf("GetCorsOrigins returned %d results", len(corsRes.Me)) | ||
| } | ||
| return corsRes.Me[0].DgraphCors, nil | ||
| } | ||
|
|
||
| // UpdateSchemaHistory updates graphql schema history. | ||
| func UpdateSchemaHistory(ctx context.Context, schema string) error { | ||
| req := &api.Request{ | ||
| Mutations: []*api.Mutation{ | ||
| { | ||
| Set: []*api.NQuad{ | ||
| { | ||
| Subject: "_:a", | ||
| Predicate: "dgraph.graphql.schema_history", | ||
| ObjectValue: &api.Value{Val: &api.Value_StrVal{StrVal: schema}}, | ||
| }, | ||
| { | ||
| Subject: "_:a", | ||
| Predicate: "dgraph.type", | ||
| ObjectValue: &api.Value{Val: &api.Value_StrVal{ | ||
| StrVal: "dgraph.graphql.history"}}, | ||
| }, | ||
| }, | ||
| SetNquads: []byte(fmt.Sprintf(`_:a <dgraph.graphql.schema_created_at> "%s" .`, | ||
| time.Now().Format(time.RFC3339))), | ||
| }, | ||
| }, | ||
| CommitNow: true, | ||
| } | ||
| _, err := (&Server{}).doQuery(context.WithValue(ctx, IsGraphql, true), req, NoAuthorize) | ||
| return err | ||
| } |
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