Use vendored go-swagger (#8087)

* Use vendored go-swagger

* vendor go-swagger

* revert un wanteed change

* remove un-needed GO111MODULE

* Update Makefile

Co-Authored-By: techknowlogick <matti@mdranta.net>

vendor/github.com/go-openapi/swag/loading.go

@@ -0,0 +1,80 @@
+// Copyright 2015 go-swagger maintainers
+//
+// 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 swag
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+// LoadHTTPTimeout the default timeout for load requests
+var LoadHTTPTimeout = 30 * time.Second
+
+// LoadFromFileOrHTTP loads the bytes from a file or a remote http server based on the path passed in
+func LoadFromFileOrHTTP(path string) ([]byte, error) {
+	return LoadStrategy(path, ioutil.ReadFile, loadHTTPBytes(LoadHTTPTimeout))(path)
+}
+
+// LoadFromFileOrHTTPWithTimeout loads the bytes from a file or a remote http server based on the path passed in
+// timeout arg allows for per request overriding of the request timeout
+func LoadFromFileOrHTTPWithTimeout(path string, timeout time.Duration) ([]byte, error) {
+	return LoadStrategy(path, ioutil.ReadFile, loadHTTPBytes(timeout))(path)
+}
+
+// LoadStrategy returns a loader function for a given path or uri
+func LoadStrategy(path string, local, remote func(string) ([]byte, error)) func(string) ([]byte, error) {
+	if strings.HasPrefix(path, "http") {
+		return remote
+	}
+	return func(pth string) ([]byte, error) {
+		upth, err := pathUnescape(pth)
+		if err != nil {
+			return nil, err
+		}
+		return local(filepath.FromSlash(upth))
+	}
+}
+
+func loadHTTPBytes(timeout time.Duration) func(path string) ([]byte, error) {
+	return func(path string) ([]byte, error) {
+		client := &http.Client{Timeout: timeout}
+		req, err := http.NewRequest("GET", path, nil)
+		if err != nil {
+			return nil, err
+		}
+		resp, err := client.Do(req)
+		defer func() {
+			if resp != nil {
+				if e := resp.Body.Close(); e != nil {
+					log.Println(e)
+				}
+			}
+		}()
+		if err != nil {
+			return nil, err
+		}
+
+		if resp.StatusCode != http.StatusOK {
+			return nil, fmt.Errorf("could not access document at %q [%s] ", path, resp.Status)
+		}
+
+		return ioutil.ReadAll(resp.Body)
+	}
+}