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// Copyright (c) 2014 Couchbase, Inc.
//
// 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 (
"fmt"
"net/http"
"time"
"github.com/blevesearch/bleve/document"
)
type DocGetHandler struct {
defaultIndexName string
IndexNameLookup varLookupFunc
DocIDLookup varLookupFunc
}
func NewDocGetHandler(defaultIndexName string) *DocGetHandler {
return &DocGetHandler{
defaultIndexName: defaultIndexName,
}
}
func (h *DocGetHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
// find the index to operate on
var indexName string
if h.IndexNameLookup != nil {
indexName = h.IndexNameLookup(req)
}
if indexName == "" {
indexName = h.defaultIndexName
}
index := IndexByName(indexName)
if index == nil {
showError(w, req, fmt.Sprintf("no such index '%s'", indexName), 404)
return
}
// find the doc id
var docID string
if h.DocIDLookup != nil {
docID = h.DocIDLookup(req)
}
if docID == "" {
showError(w, req, "document id cannot be empty", 400)
return
}
doc, err := index.Document(docID)
if err != nil {
showError(w, req, fmt.Sprintf("error deleting document '%s': %v", docID, err), 500)
return
}
if doc == nil {
showError(w, req, fmt.Sprintf("no such document '%s'", docID), 404)
return
}
rv := struct {
ID string `json:"id"`
Fields map[string]interface{} `json:"fields"`
}{
ID: docID,
Fields: map[string]interface{}{},
}
for _, field := range doc.Fields {
var newval interface{}
switch field := field.(type) {
case *document.TextField:
newval = string(field.Value())
case *document.NumericField:
n, err := field.Number()
if err == nil {
newval = n
}
case *document.DateTimeField:
d, err := field.DateTime()
if err == nil {
newval = d.Format(time.RFC3339Nano)
}
}
existing, existed := rv.Fields[field.Name()]
if existed {
switch existing := existing.(type) {
case []interface{}:
rv.Fields[field.Name()] = append(existing, newval)
case interface{}:
arr := make([]interface{}, 2)
arr[0] = existing
arr[1] = newval
rv.Fields[field.Name()] = arr
}
} else {
rv.Fields[field.Name()] = newval
}
}
mustEncode(w, rv)
}
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