Function writeCanonicalizedResource

pkg/signer/request-signature-v2.go:289–319

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"];

(buf *bytes.Buffer, req http.Request, virtualHost bool)

//	<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, virtualHost bool) {
	// Save request URL.
	requestURL := req.URL
	// Get encoded URL path.
	buf.WriteString(encodeURL2Path(&req, virtualHost))
	if requestURL.RawQuery != "" {
		var n int
		vals, _ := url.ParseQuery(requestURL.RawQuery)
		// Verify if any sub resource queries are present, if yes
		// canonicallize them.
		for _, resource := range resourceList {
			if vv, ok := vals[resource]; ok && len(vv) > 0 {
				n++
				// First element
				switch n {
				case 1:
					buf.WriteByte('?')
				// The rest
				default:
					buf.WriteByte('&')
				}
				buf.WriteString(resource)
				// Request parameters
				if len(vv[0]) > 0 {
					buf.WriteByte('=')
					buf.WriteString(vv[0])
				}
			}
		}
	}
}