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find_parser.go
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/
find_parser.go
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// Copyright (c) 2019 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package graphite
import (
"fmt"
"io"
"net/http"
"time"
"github.com/m3db/m3/src/query/errors"
"github.com/m3db/m3/src/query/graphite/graphite"
graphiteStorage "github.com/m3db/m3/src/query/graphite/storage"
"github.com/m3db/m3/src/query/storage"
"github.com/m3db/m3/src/query/util/json"
"github.com/m3db/m3/src/x/net/http"
)
func parseFindParamsToQuery(r *http.Request) (
*storage.FetchQuery,
*xhttp.ParseError,
) {
values := r.URL.Query()
now := time.Now()
fromString, untilString := r.FormValue("from"), r.FormValue("until")
if len(fromString) == 0 {
fromString = "0"
}
if len(untilString) == 0 {
untilString = "now"
}
from, err := graphite.ParseTime(
fromString,
now,
tzOffsetForAbsoluteTime,
)
if err != nil {
return nil, xhttp.NewParseError(fmt.Errorf("invalid 'from': %s", fromString),
http.StatusBadRequest)
}
until, err := graphite.ParseTime(
untilString,
now,
tzOffsetForAbsoluteTime,
)
if err != nil {
return nil, xhttp.NewParseError(fmt.Errorf("invalid 'until': %s", untilString),
http.StatusBadRequest)
}
query := values.Get("query")
if query == "" {
return nil, xhttp.NewParseError(errors.ErrNoQueryFound, http.StatusBadRequest)
}
matchers := graphiteStorage.TranslateQueryToMatchers(query)
return &storage.FetchQuery{
Raw: query,
TagMatchers: matchers,
Start: from,
End: until,
Interval: 0,
}, nil
}
func findResultsJSON(
w io.Writer,
prefix string,
tags map[string]bool,
) error {
jw := json.NewWriter(w)
jw.BeginArray()
for value, hasChildren := range tags {
leaf := 1
if hasChildren {
leaf = 0
}
jw.BeginObject()
jw.BeginObjectField("id")
jw.WriteString(fmt.Sprintf("%s%s", prefix, value))
jw.BeginObjectField("text")
jw.WriteString(value)
jw.BeginObjectField("leaf")
jw.WriteInt(leaf)
jw.BeginObjectField("expandable")
jw.WriteInt(1 - leaf)
jw.BeginObjectField("allowChildren")
jw.WriteInt(1 - leaf)
jw.EndObject()
}
jw.EndArray()
return jw.Close()
}