145 lines
3.6 KiB
Go
145 lines
3.6 KiB
Go
// Copyright 2014 The Cayley Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package http
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import (
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"strconv"
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"github.com/barakmich/glog"
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"github.com/julienschmidt/httprouter"
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"github.com/google/cayley/internal"
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"github.com/google/cayley/quad"
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"github.com/google/cayley/quad/cquads"
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)
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func ParseJSONToQuadList(jsonBody []byte) ([]quad.Quad, error) {
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var quads []quad.Quad
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err := json.Unmarshal(jsonBody, &quads)
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if err != nil {
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return nil, err
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}
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for i, q := range quads {
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if !q.IsValid() {
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return nil, fmt.Errorf("invalid quad at index %d. %s", i, q)
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}
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}
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return quads, nil
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}
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func (api *API) ServeV1Write(w http.ResponseWriter, r *http.Request, _ httprouter.Params) int {
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if api.config.ReadOnly {
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return jsonResponse(w, 400, "Database is read-only.")
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}
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bodyBytes, err := ioutil.ReadAll(r.Body)
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if err != nil {
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return jsonResponse(w, 400, err)
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}
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quads, err := ParseJSONToQuadList(bodyBytes)
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if err != nil {
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return jsonResponse(w, 400, err)
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}
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h, err := api.GetHandleForRequest(r)
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if err != nil {
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return jsonResponse(w, 400, err)
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}
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h.QuadWriter.AddQuadSet(quads)
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fmt.Fprintf(w, "{\"result\": \"Successfully wrote %d quads.\"}", len(quads))
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return 200
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}
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func (api *API) ServeV1WriteNQuad(w http.ResponseWriter, r *http.Request, params httprouter.Params) int {
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if api.config.ReadOnly {
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return jsonResponse(w, 400, "Database is read-only.")
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}
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formFile, _, err := r.FormFile("NQuadFile")
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if err != nil {
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glog.Errorln(err)
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return jsonResponse(w, 500, "Couldn't read file: "+err.Error())
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}
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defer formFile.Close()
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blockSize, blockErr := strconv.ParseInt(r.URL.Query().Get("block_size"), 10, 64)
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if blockErr != nil {
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blockSize = int64(api.config.LoadSize)
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}
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quadReader, err := internal.Decompressor(formFile)
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// TODO(kortschak) Make this configurable from the web UI.
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dec := cquads.NewDecoder(quadReader)
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h, err := api.GetHandleForRequest(r)
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if err != nil {
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return jsonResponse(w, 400, err)
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}
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var (
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n int
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block = make([]quad.Quad, 0, blockSize)
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)
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for {
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t, err := dec.Unmarshal()
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if err != nil {
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if err == io.EOF {
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break
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}
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glog.Fatalln("what can do this here?", err) // FIXME(kortschak)
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}
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block = append(block, t)
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n++
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if len(block) == cap(block) {
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h.QuadWriter.AddQuadSet(block)
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block = block[:0]
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}
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}
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h.QuadWriter.AddQuadSet(block)
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fmt.Fprintf(w, "{\"result\": \"Successfully wrote %d quads.\"}", n)
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return 200
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}
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func (api *API) ServeV1Delete(w http.ResponseWriter, r *http.Request, params httprouter.Params) int {
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if api.config.ReadOnly {
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return jsonResponse(w, 400, "Database is read-only.")
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}
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bodyBytes, err := ioutil.ReadAll(r.Body)
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if err != nil {
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return jsonResponse(w, 400, err)
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}
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quads, err := ParseJSONToQuadList(bodyBytes)
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if err != nil {
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return jsonResponse(w, 400, err)
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}
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h, err := api.GetHandleForRequest(r)
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if err != nil {
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return jsonResponse(w, 400, err)
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}
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count := 0
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for _, q := range quads {
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h.QuadWriter.RemoveQuad(q)
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count++
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}
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fmt.Fprintf(w, "{\"result\": \"Successfully deleted %d quads.\"}", count)
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return 200
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}
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