From 701d1ab638b23c24877fc41824add66232446676 Mon Sep 17 00:00:00 2001
From: Christopher Speller <crspeller@gmail.com>
Date: Thu, 2 Feb 2017 09:32:00 -0500
Subject: Updating server dependancies (#5249)

---
 .../github.com/minio/minio-go/pkg/s3utils/utils.go | 195 +++++++++++++++++++++
 1 file changed, 195 insertions(+)
 create mode 100644 vendor/github.com/minio/minio-go/pkg/s3utils/utils.go

(limited to 'vendor/github.com/minio/minio-go/pkg/s3utils/utils.go')

diff --git a/vendor/github.com/minio/minio-go/pkg/s3utils/utils.go b/vendor/github.com/minio/minio-go/pkg/s3utils/utils.go
new file mode 100644
index 000000000..ae1cea337
--- /dev/null
+++ b/vendor/github.com/minio/minio-go/pkg/s3utils/utils.go
@@ -0,0 +1,195 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2016 Minio, Inc.
+ *
+ * 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 s3utils
+
+import (
+	"bytes"
+	"encoding/hex"
+	"net"
+	"net/url"
+	"regexp"
+	"sort"
+	"strings"
+	"unicode/utf8"
+)
+
+// Sentinel URL is the default url value which is invalid.
+var sentinelURL = url.URL{}
+
+// IsValidDomain validates if input string is a valid domain name.
+func IsValidDomain(host string) bool {
+	// See RFC 1035, RFC 3696.
+	host = strings.TrimSpace(host)
+	if len(host) == 0 || len(host) > 255 {
+		return false
+	}
+	// host cannot start or end with "-"
+	if host[len(host)-1:] == "-" || host[:1] == "-" {
+		return false
+	}
+	// host cannot start or end with "_"
+	if host[len(host)-1:] == "_" || host[:1] == "_" {
+		return false
+	}
+	// host cannot start or end with a "."
+	if host[len(host)-1:] == "." || host[:1] == "." {
+		return false
+	}
+	// All non alphanumeric characters are invalid.
+	if strings.ContainsAny(host, "`~!@#$%^&*()+={}[]|\\\"';:><?/") {
+		return false
+	}
+	// No need to regexp match, since the list is non-exhaustive.
+	// We let it valid and fail later.
+	return true
+}
+
+// IsValidIP parses input string for ip address validity.
+func IsValidIP(ip string) bool {
+	return net.ParseIP(ip) != nil
+}
+
+// IsVirtualHostSupported - verifies if bucketName can be part of
+// virtual host. Currently only Amazon S3 and Google Cloud Storage
+// would support this.
+func IsVirtualHostSupported(endpointURL url.URL, bucketName string) bool {
+	if endpointURL == sentinelURL {
+		return false
+	}
+	// bucketName can be valid but '.' in the hostname will fail SSL
+	// certificate validation. So do not use host-style for such buckets.
+	if endpointURL.Scheme == "https" && strings.Contains(bucketName, ".") {
+		return false
+	}
+	// Return true for all other cases
+	return IsAmazonEndpoint(endpointURL) || IsGoogleEndpoint(endpointURL)
+}
+
+// IsAmazonEndpoint - Match if it is exactly Amazon S3 endpoint.
+func IsAmazonEndpoint(endpointURL url.URL) bool {
+	if IsAmazonChinaEndpoint(endpointURL) {
+		return true
+	}
+
+	if IsAmazonS3AccelerateEndpoint(endpointURL) {
+		return true
+	}
+
+	return endpointURL.Host == "s3.amazonaws.com"
+}
+
+// IsAmazonChinaEndpoint - Match if it is exactly Amazon S3 China endpoint.
+// Customers who wish to use the new Beijing Region are required
+// to sign up for a separate set of account credentials unique to
+// the China (Beijing) Region. Customers with existing AWS credentials
+// will not be able to access resources in the new Region, and vice versa.
+// For more info https://aws.amazon.com/about-aws/whats-new/2013/12/18/announcing-the-aws-china-beijing-region/
+func IsAmazonChinaEndpoint(endpointURL url.URL) bool {
+	if endpointURL == sentinelURL {
+		return false
+	}
+	return endpointURL.Host == "s3.cn-north-1.amazonaws.com.cn"
+}
+
+// IsAmazonS3AccelerateEndpoint - Match if it is an Amazon S3 Accelerate
+func IsAmazonS3AccelerateEndpoint(endpointURL url.URL) bool {
+	if endpointURL == sentinelURL {
+		return false
+	}
+	return endpointURL.Host == "s3-accelerate.amazonaws.com"
+}
+
+// IsGoogleEndpoint - Match if it is exactly Google cloud storage endpoint.
+func IsGoogleEndpoint(endpointURL url.URL) bool {
+	if endpointURL == sentinelURL {
+		return false
+	}
+	return endpointURL.Host == "storage.googleapis.com"
+}
+
+// Expects ascii encoded strings - from output of urlEncodePath
+func percentEncodeSlash(s string) string {
+	return strings.Replace(s, "/", "%2F", -1)
+}
+
+// QueryEncode - encodes query values in their URL encoded form. In
+// addition to the percent encoding performed by urlEncodePath() used
+// here, it also percent encodes '/' (forward slash)
+func QueryEncode(v url.Values) string {
+	if v == nil {
+		return ""
+	}
+	var buf bytes.Buffer
+	keys := make([]string, 0, len(v))
+	for k := range v {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	for _, k := range keys {
+		vs := v[k]
+		prefix := percentEncodeSlash(EncodePath(k)) + "="
+		for _, v := range vs {
+			if buf.Len() > 0 {
+				buf.WriteByte('&')
+			}
+			buf.WriteString(prefix)
+			buf.WriteString(percentEncodeSlash(EncodePath(v)))
+		}
+	}
+	return buf.String()
+}
+
+// if object matches reserved string, no need to encode them
+var reservedObjectNames = regexp.MustCompile("^[a-zA-Z0-9-_.~/]+$")
+
+// EncodePath encode the strings from UTF-8 byte representations to HTML hex escape sequences
+//
+// This is necessary since regular url.Parse() and url.Encode() functions do not support UTF-8
+// non english characters cannot be parsed due to the nature in which url.Encode() is written
+//
+// This function on the other hand is a direct replacement for url.Encode() technique to support
+// pretty much every UTF-8 character.
+func EncodePath(pathName string) string {
+	if reservedObjectNames.MatchString(pathName) {
+		return pathName
+	}
+	var encodedPathname string
+	for _, s := range pathName {
+		if 'A' <= s && s <= 'Z' || 'a' <= s && s <= 'z' || '0' <= s && s <= '9' { // §2.3 Unreserved characters (mark)
+			encodedPathname = encodedPathname + string(s)
+			continue
+		}
+		switch s {
+		case '-', '_', '.', '~', '/': // §2.3 Unreserved characters (mark)
+			encodedPathname = encodedPathname + string(s)
+			continue
+		default:
+			len := utf8.RuneLen(s)
+			if len < 0 {
+				// if utf8 cannot convert return the same string as is
+				return pathName
+			}
+			u := make([]byte, len)
+			utf8.EncodeRune(u, s)
+			for _, r := range u {
+				hex := hex.EncodeToString([]byte{r})
+				encodedPathname = encodedPathname + "%" + strings.ToUpper(hex)
+			}
+		}
+	}
+	return encodedPathname
+}
-- 
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