vendorify
diff --git a/go/vendor/github.com/go-openapi/runtime/middleware/negotiate.go b/go/vendor/github.com/go-openapi/runtime/middleware/negotiate.go
new file mode 100644
index 0000000..a9b6f27
--- /dev/null
+++ b/go/vendor/github.com/go-openapi/runtime/middleware/negotiate.go
@@ -0,0 +1,98 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd.
+
+// this file was taken from the github.com/golang/gddo repository
+
+package middleware
+
+import (
+ "net/http"
+ "strings"
+
+ "github.com/go-openapi/runtime/middleware/header"
+)
+
+// NegotiateContentEncoding returns the best offered content encoding for the
+// request's Accept-Encoding header. If two offers match with equal weight and
+// then the offer earlier in the list is preferred. If no offers are
+// acceptable, then "" is returned.
+func NegotiateContentEncoding(r *http.Request, offers []string) string {
+ bestOffer := "identity"
+ bestQ := -1.0
+ specs := header.ParseAccept(r.Header, "Accept-Encoding")
+ for _, offer := range offers {
+ for _, spec := range specs {
+ if spec.Q > bestQ &&
+ (spec.Value == "*" || spec.Value == offer) {
+ bestQ = spec.Q
+ bestOffer = offer
+ }
+ }
+ }
+ if bestQ == 0 {
+ bestOffer = ""
+ }
+ return bestOffer
+}
+
+// NegotiateContentType returns the best offered content type for the request's
+// Accept header. If two offers match with equal weight, then the more specific
+// offer is preferred. For example, text/* trumps */*. If two offers match
+// with equal weight and specificity, then the offer earlier in the list is
+// preferred. If no offers match, then defaultOffer is returned.
+func NegotiateContentType(r *http.Request, offers []string, defaultOffer string) string {
+ bestOffer := defaultOffer
+ bestQ := -1.0
+ bestWild := 3
+ specs := header.ParseAccept(r.Header, "Accept")
+ for _, rawOffer := range offers {
+ offer := normalizeOffer(rawOffer)
+ // No Accept header: just return the first offer.
+ if len(specs) == 0 {
+ return rawOffer
+ }
+ for _, spec := range specs {
+ switch {
+ case spec.Q == 0.0:
+ // ignore
+ case spec.Q < bestQ:
+ // better match found
+ case spec.Value == "*/*":
+ if spec.Q > bestQ || bestWild > 2 {
+ bestQ = spec.Q
+ bestWild = 2
+ bestOffer = rawOffer
+ }
+ case strings.HasSuffix(spec.Value, "/*"):
+ if strings.HasPrefix(offer, spec.Value[:len(spec.Value)-1]) &&
+ (spec.Q > bestQ || bestWild > 1) {
+ bestQ = spec.Q
+ bestWild = 1
+ bestOffer = rawOffer
+ }
+ default:
+ if spec.Value == offer &&
+ (spec.Q > bestQ || bestWild > 0) {
+ bestQ = spec.Q
+ bestWild = 0
+ bestOffer = rawOffer
+ }
+ }
+ }
+ }
+ return bestOffer
+}
+
+func normalizeOffers(orig []string) (norm []string) {
+ for _, o := range orig {
+ norm = append(norm, normalizeOffer(o))
+ }
+ return
+}
+
+func normalizeOffer(orig string) string {
+ return strings.SplitN(orig, ";", 2)[0]
+}