diff --git a/src/android/FileTransfer.java b/src/android/FileTransfer.java
index 9c8dacb..4baefe7 100644
--- a/src/android/FileTransfer.java
+++ b/src/android/FileTransfer.java
@@ -197,12 +197,32 @@ public class FileTransfer extends CordovaPlugin {
     private static void addHeadersToRequest(URLConnection connection, JSONObject headers) {
         try {
             for (Iterator<?> iter = headers.keys(); iter.hasNext(); ) {
+                /* RFC 2616 says that non-ASCII characters and control
+                 * characters are not allowed in header names or values.
+                 * Additionally, spaces are not allowed in header names.
+                 * RFC 2046 Quoted-printable encoding may be used to encode
+                 * arbitrary characters, but we donon- not do that encoding here.
+                 */
                 String headerKey = iter.next().toString();
+                headerKey = headerKey.replaceAll("\\n","")
+                        .replaceAll("\\s+","")
+                        .replaceAll("[^\\x20-\\x7E]+", "");
+
                 JSONArray headerValues = headers.optJSONArray(headerKey);
                 if (headerValues == null) {
                     headerValues = new JSONArray();
-                    headerValues.put(headers.getString(headerKey));
+
+                     /* RFC 2616 also says that any amount of consecutive linear
+                      * whitespace within a header value can be replaced with a
+                      * single space character, without affecting the meaning of
+                      * that value.
+                      */
+
+                    String headerValue = headers.getString(headerKey);
+                    String finalValue = headerValue.replaceAll("\\s+", "").replaceAll("\\n","").replaceAll("[^\\x20-\\x7E]+", " ");;
+                    headerValues.put(finalValue);
                 }
+
                 connection.setRequestProperty(headerKey, headerValues.getString(0));
                 for (int i = 1; i < headerValues.length(); ++i) {
                     connection.addRequestProperty(headerKey, headerValues.getString(i));