httputil: remove non-general helper functions

util/httputil/util.go

@@ -1,65 +0,0 @@
-// Copyright 2013 The Prometheus Authors
-// 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 httputil
-
-import (
-	"encoding/json"
-	"io"
-	"net/http"
-	"net/url"
-
-	"github.com/prometheus/prometheus/promql"
-)
-
-// GetQueryParams calls r.ParseForm and returns r.Form.
-func GetQueryParams(r *http.Request) url.Values {
-	r.ParseForm()
-	return r.Form
-}
-
-var jsonFormatVersion = 1
-
-// ErrorJSON writes the given error JSON-formatted to w.
-func ErrorJSON(w io.Writer, err error) error {
-	data := struct {
-		Type    string `json:"type"`
-		Value   string `json:"value"`
-		Version int    `json:"version"`
-	}{
-		Type:    "error",
-		Value:   err.Error(),
-		Version: jsonFormatVersion,
-	}
-	enc := json.NewEncoder(w)
-	return enc.Encode(data)
-}
-
-// RespondJSON converts the given data value to JSON and writes it to w.
-func RespondJSON(w io.Writer, val promql.Value) error {
-	data := struct {
-		Type    string      `json:"type"`
-		Value   interface{} `json:"value"`
-		Version int         `json:"version"`
-	}{
-		Type:    val.Type().String(),
-		Value:   val,
-		Version: jsonFormatVersion,
-	}
-	// TODO(fabxc): Adding MarshalJSON to promql.Values might be a good idea.
-	if sc, ok := val.(*promql.Scalar); ok {
-		data.Value = sc.Value
-	}
-	enc := json.NewEncoder(w)
-	return enc.Encode(data)
-}