vendor: update github.com/ncw/swift to help with #3041

vendor/github.com/ncw/swift/compatibility_1_6.go

@@ -14,7 +14,9 @@ func SetExpectContinueTimeout(tr *http.Transport, t time.Duration) {
 }
 
 func AddExpectAndTransferEncoding(req *http.Request, hasContentLength bool) {
-	req.Header.Add("Expect", "100-continue")
+	if req.Body != nil {
+		req.Header.Add("Expect", "100-continue")
+	}
 	if !hasContentLength {
 		req.TransferEncoding = []string{"chunked"}
 	}

vendor/github.com/ncw/swift/swift.go

@@ -308,6 +308,7 @@ var (
 	Forbidden           = newError(403, "Operation forbidden")
 	TooLargeObject      = newError(413, "Too Large Object")
 	RateLimit           = newError(498, "Rate Limit")
+	TooManyRequests     = newError(429, "TooManyRequests")
 
 	// Mappings for authentication errors
 	authErrorMap = errorMap{
@@ -333,6 +334,7 @@ var (
 		404: ObjectNotFound,
 		413: TooLargeObject,
 		422: ObjectCorrupted,
+		429: TooManyRequests,
 		498: RateLimit,
 	}
 )
@@ -734,11 +736,11 @@ func (c *Connection) Call(targetUrl string, p RequestOpts) (resp *http.Response,
 			for k, v := range p.Headers {
 				// Set ContentLength in req if the user passed it in in the headers
 				if k == "Content-Length" {
-					contentLength, err := strconv.ParseInt(v, 10, 64)
+					req.ContentLength, err = strconv.ParseInt(v, 10, 64)
 					if err != nil {
-						return nil, nil, fmt.Errorf("Invalid %q header %q: %v", k, v, err)
+						err = fmt.Errorf("Invalid %q header %q: %v", k, v, err)
+						return
 					}
-					req.ContentLength = contentLength
 				} else {
 					req.Header.Add(k, v)
 				}
@@ -756,7 +758,7 @@ func (c *Connection) Call(targetUrl string, p RequestOpts) (resp *http.Response,
 				retries--
 				continue
 			}
-			return nil, nil, err
+			return
 		}
 		// Check to see if token has expired
 		if resp.StatusCode == 401 && retries > 0 {
@@ -768,15 +770,14 @@ func (c *Connection) Call(targetUrl string, p RequestOpts) (resp *http.Response,
 		}
 	}
 
-	if err = c.parseHeaders(resp, p.ErrorMap); err != nil {
-		return nil, nil, err
-	}
 	headers = readHeaders(resp)
+	if err = c.parseHeaders(resp, p.ErrorMap); err != nil {
+		return
+	}
 	if p.NoResponse {
-		var err error
 		drainAndClose(resp.Body, &err)
 		if err != nil {
-			return nil, nil, err
+			return
 		}
 	} else {
 		// Cancel the request on timeout

vendor/modules.txt

@@ -108,7 +108,7 @@ github.com/kr/fs
 github.com/mattn/go-runewidth
 # github.com/ncw/go-acd v0.0.0-20171120105400-887eb06ab6a2
 github.com/ncw/go-acd
-# github.com/ncw/swift v1.0.46
+# github.com/ncw/swift v1.0.47
 github.com/ncw/swift
 # github.com/nsf/termbox-go v0.0.0-20190121233118-02980233997d
 github.com/nsf/termbox-go