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kldparams.go
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kldparams.go
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// Copyright 2019 SEE CONTRIBUTORS
// 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 maidenlanedcontracts
import (
"net/http"
"net/textproto"
"strings"
)
func getQueryParamNoCase(name string, req *http.Request) []string {
name = strings.ToLower(name)
req.ParseForm()
for k, vs := range req.Form {
if strings.ToLower(k) == name {
return vs
}
}
return nil
}
// getKLDParam standardizes how special 'maidenlaned' params are specified, in query params, or headers
func getKLDParam(name string, req *http.Request, isBool bool) string {
valStr := ""
vs := getQueryParamNoCase("maidenlaned-"+name, req)
if len(vs) > 0 {
valStr = vs[0]
}
if isBool && valStr == "" && len(vs) > 0 {
valStr = "true"
}
if valStr == "" {
valStr = req.Header.Get("x-maidenlane-" + name)
}
return valStr
}
// getKLDParamMulti returns an array parameter, or nil if none specified.
// allows multiple query params / headers, or a single comma-separated query param / header
func getKLDParamMulti(name string, req *http.Request) (val []string) {
req.ParseForm()
val = getQueryParamNoCase("maidenlaned-"+name, req)
if len(val) == 0 {
val = textproto.MIMEHeader(req.Header)[textproto.CanonicalMIMEHeaderKey("x-maidenlane-"+name)]
}
if val != nil && len(val) == 1 {
val = strings.Split(val[0], ",")
}
return
}