Even mux vars don't help, handle it by looking at req.URL.Path

pkg/api/api_signature.go

@@ -30,7 +30,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/gorilla/mux"
 	"github.com/minio-io/minio/pkg/api/config"
 )
 
@@ -169,14 +168,30 @@ var subResList = []string{
 	"website",
 }
 
+func url2BucketAndObject(url string) (string, string) {
+	var bucketName, objectName string
+	splits := strings.SplitN(url, "/", 3)
+	switch len(splits) {
+	case 0, 1:
+		bucketName = ""
+		objectName = ""
+	case 2:
+		bucketName = splits[1]
+		objectName = ""
+	case 3:
+		bucketName = splits[1]
+		objectName = splits[2]
+	}
+	return bucketName, objectName
+}
+
 // From the Amazon docs:
 //
 // CanonicalizedResource = [ "/" + Bucket ] +
 // 	  <HTTP-Request-URI, from the protocol name up to the query string> +
 // 	  [ sub-resource, if present. For example "?acl", "?location", "?logging", or "?torrent"];
 func writeCanonicalizedResource(buf *bytes.Buffer, req *http.Request) {
-	vars := mux.Vars(req)
-	bucket := vars["bucket"]
+	bucket, _ := url2BucketAndObject(req.URL.Path)
 	if bucket != "" {
 		buf.WriteByte('/')
 		buf.WriteString(bucket)

pkg/api/api_test.go

@@ -113,17 +113,18 @@ func (s *MySuite) TearDownTest(c *C) {
 }
 
 func setAuthHeader(req *http.Request) {
+	if date := req.Header.Get("Date"); date == "" {
+		req.Header.Set("Date", time.Now().UTC().Format(http.TimeFormat))
+	}
 	hm := hmac.New(sha1.New, []byte("H+AVh8q5G7hEH2r3WxFP135+Q19Aw8yXWel8IGh/HrEjZyTNx/n4Xw=="))
 	ss := getStringToSign(req)
 	io.WriteString(hm, ss)
-
 	authHeader := new(bytes.Buffer)
 	fmt.Fprintf(authHeader, "AWS %s:", "AC5NH40NQLTL4D2W92PM")
 	encoder := base64.NewEncoder(base64.StdEncoding, authHeader)
 	encoder.Write(hm.Sum(nil))
 	encoder.Close()
 	req.Header.Set("Authorization", authHeader.String())
-	req.Header.Set("Date", time.Now().UTC().Format(http.TimeFormat))
 }
 
 func (s *MySuite) TestNonExistantBucket(c *C) {