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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 (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"github.com/blevesearch/bleve"
"github.com/blevesearch/bleve/search/query"
)
// SearchHandler can handle search requests sent over HTTP
type SearchHandler struct {
defaultIndexName string
IndexNameLookup varLookupFunc
}
func NewSearchHandler(defaultIndexName string) *SearchHandler {
return &SearchHandler{
defaultIndexName: defaultIndexName,
}
}
func (h *SearchHandler) 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
}
// read the request body
requestBody, err := ioutil.ReadAll(req.Body)
if err != nil {
showError(w, req, fmt.Sprintf("error reading request body: %v", err), 400)
return
}
logger.Printf("request body: %s", requestBody)
// parse the request
var searchRequest bleve.SearchRequest
err = json.Unmarshal(requestBody, &searchRequest)
if err != nil {
showError(w, req, fmt.Sprintf("error parsing query: %v", err), 400)
return
}
logger.Printf("parsed request %#v", searchRequest)
// validate the query
if srqv, ok := searchRequest.Query.(query.ValidatableQuery); ok {
err = srqv.Validate()
if err != nil {
showError(w, req, fmt.Sprintf("error validating query: %v", err), 400)
return
}
}
// execute the query
searchResponse, err := index.Search(&searchRequest)
if err != nil {
showError(w, req, fmt.Sprintf("error executing query: %v", err), 500)
return
}
// encode the response
mustEncode(w, searchResponse)
}
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