Bump google.golang.org/api

vendor/github.com/google/martian/proxyutil/proxyutil.go

@@ -0,0 +1,104 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// 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 proxyutil provides functionality for building proxies.
+*/
+package proxyutil
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// NewResponse builds new HTTP responses.
+// If body is nil, an empty byte.Buffer will be provided to be consistent with
+// the guarantees provided by http.Transport and http.Client.
+func NewResponse(code int, body io.Reader, req *http.Request) *http.Response {
+	if body == nil {
+		body = &bytes.Buffer{}
+	}
+
+	rc, ok := body.(io.ReadCloser)
+	if !ok {
+		rc = ioutil.NopCloser(body)
+	}
+
+	res := &http.Response{
+		StatusCode: code,
+		Status:     fmt.Sprintf("%d %s", code, http.StatusText(code)),
+		Proto:      "HTTP/1.1",
+		ProtoMajor: 1,
+		ProtoMinor: 1,
+		Header:     http.Header{},
+		Body:       rc,
+		Request:    req,
+	}
+
+	if req != nil {
+		res.Close = req.Close
+		res.Proto = req.Proto
+		res.ProtoMajor = req.ProtoMajor
+		res.ProtoMinor = req.ProtoMinor
+	}
+
+	return res
+}
+
+// Warning adds an error to the Warning header in the format: 199 "martian"
+// "error message" "date".
+func Warning(header http.Header, err error) {
+	date := header.Get("Date")
+	if date == "" {
+		date = time.Now().Format(http.TimeFormat)
+	}
+
+	w := fmt.Sprintf(`199 "martian" %q %q`, err.Error(), date)
+	header.Add("Warning", w)
+}
+
+// GetRangeStart returns the byte index of the start of the range, if it has one.
+// Returns 0 if the range header is absent, and -1 if the range header is invalid or
+// has multi-part ranges.
+func GetRangeStart(res *http.Response) int64 {
+	if res.StatusCode != http.StatusPartialContent {
+		return 0
+	}
+
+	if strings.Contains(res.Header.Get("Content-Type"), "multipart/byteranges") {
+		return -1
+	}
+
+	re := regexp.MustCompile(`bytes (\d+)-\d+/\d+`)
+	matchSlice := re.FindStringSubmatch(res.Header.Get("Content-Range"))
+
+	if len(matchSlice) < 2 {
+		return -1
+	}
+
+	num, err := strconv.ParseInt(matchSlice[1], 10, 64)
+
+	if err != nil {
+		return -1
+	}
+	return num
+}
+