internal: move {config,db,http} into internal

internal/http/write.go

@@ -0,0 +1,144 @@
+// Copyright 2014 The Cayley Authors. 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 http
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"strconv"
+
+	"github.com/barakmich/glog"
+	"github.com/julienschmidt/httprouter"
+
+	"github.com/google/cayley/internal"
+	"github.com/google/cayley/quad"
+	"github.com/google/cayley/quad/cquads"
+)
+
+func ParseJSONToQuadList(jsonBody []byte) ([]quad.Quad, error) {
+	var quads []quad.Quad
+	err := json.Unmarshal(jsonBody, &quads)
+	if err != nil {
+		return nil, err
+	}
+	for i, q := range quads {
+		if !q.IsValid() {
+			return nil, fmt.Errorf("invalid quad at index %d. %s", i, q)
+		}
+	}
+	return quads, nil
+}
+
+func (api *API) ServeV1Write(w http.ResponseWriter, r *http.Request, _ httprouter.Params) int {
+	if api.config.ReadOnly {
+		return jsonResponse(w, 400, "Database is read-only.")
+	}
+	bodyBytes, err := ioutil.ReadAll(r.Body)
+	if err != nil {
+		return jsonResponse(w, 400, err)
+	}
+	quads, err := ParseJSONToQuadList(bodyBytes)
+	if err != nil {
+		return jsonResponse(w, 400, err)
+	}
+	h, err := api.GetHandleForRequest(r)
+	if err != nil {
+		return jsonResponse(w, 400, err)
+	}
+
+	h.QuadWriter.AddQuadSet(quads)
+	fmt.Fprintf(w, "{\"result\": \"Successfully wrote %d quads.\"}", len(quads))
+	return 200
+}
+
+func (api *API) ServeV1WriteNQuad(w http.ResponseWriter, r *http.Request, params httprouter.Params) int {
+	if api.config.ReadOnly {
+		return jsonResponse(w, 400, "Database is read-only.")
+	}
+
+	formFile, _, err := r.FormFile("NQuadFile")
+	if err != nil {
+		glog.Errorln(err)
+		return jsonResponse(w, 500, "Couldn't read file: "+err.Error())
+	}
+	defer formFile.Close()
+
+	blockSize, blockErr := strconv.ParseInt(r.URL.Query().Get("block_size"), 10, 64)
+	if blockErr != nil {
+		blockSize = int64(api.config.LoadSize)
+	}
+
+	quadReader, err := internal.Decompressor(formFile)
+	// TODO(kortschak) Make this configurable from the web UI.
+	dec := cquads.NewDecoder(quadReader)
+
+	h, err := api.GetHandleForRequest(r)
+	if err != nil {
+		return jsonResponse(w, 400, err)
+	}
+
+	var (
+		n     int
+		block = make([]quad.Quad, 0, blockSize)
+	)
+	for {
+		t, err := dec.Unmarshal()
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			glog.Fatalln("what can do this here?", err) // FIXME(kortschak)
+		}
+		block = append(block, t)
+		n++
+		if len(block) == cap(block) {
+			h.QuadWriter.AddQuadSet(block)
+			block = block[:0]
+		}
+	}
+	h.QuadWriter.AddQuadSet(block)
+
+	fmt.Fprintf(w, "{\"result\": \"Successfully wrote %d quads.\"}", n)
+
+	return 200
+}
+
+func (api *API) ServeV1Delete(w http.ResponseWriter, r *http.Request, params httprouter.Params) int {
+	if api.config.ReadOnly {
+		return jsonResponse(w, 400, "Database is read-only.")
+	}
+	bodyBytes, err := ioutil.ReadAll(r.Body)
+	if err != nil {
+		return jsonResponse(w, 400, err)
+	}
+	quads, err := ParseJSONToQuadList(bodyBytes)
+	if err != nil {
+		return jsonResponse(w, 400, err)
+	}
+	h, err := api.GetHandleForRequest(r)
+	if err != nil {
+		return jsonResponse(w, 400, err)
+	}
+	count := 0
+	for _, q := range quads {
+		h.QuadWriter.RemoveQuad(q)
+		count++
+	}
+	fmt.Fprintf(w, "{\"result\": \"Successfully deleted %d quads.\"}", count)
+	return 200
+}