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kratos/transport/http/binding/encode.go

47 lines
1.2 KiB

package binding
import (
"reflect"
"regexp"
"github.com/go-kratos/kratos/v2/encoding/form"
"google.golang.org/protobuf/proto"
)
var reg = regexp.MustCompile(`{[\\.\w]+}`)
// EncodeURL encode proto message to url path.
func EncodeURL(pathTemplate string, msg interface{}, needQuery bool) string {
if msg == nil || (reflect.ValueOf(msg).Kind() == reflect.Ptr && reflect.ValueOf(msg).IsNil()) {
return pathTemplate
}
queryParams, _ := form.EncodeValues(msg)
pathParams := make(map[string]struct{})
path := reg.ReplaceAllStringFunc(pathTemplate, func(in string) string {
// it's unreachable because the reg means that must have more than one char in {}
//if len(in) < 4 { //nolint:gomnd // ** explain the 4 number here :-) **
// return in
//}
key := in[1 : len(in)-1]
value := queryParams.Get(key)
pathParams[key] = struct{}{}
return value
})
if !needQuery {
if v, ok := msg.(proto.Message); ok {
if query := form.EncodeFieldMask(v.ProtoReflect()); query != "" {
return path + "?" + query
}
}
return path
}
if len(queryParams) > 0 {
for key := range pathParams {
delete(queryParams, key)
}
if query := queryParams.Encode(); query != "" {
path += "?" + query
}
}
return path
}