remove the dependency for apache httpclient

src/main/java/com/github/nkzawa/engineio/client/Util.java

@@ -0,0 +1,43 @@
+package com.github.nkzawa.engineio.client;
+
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+import java.net.URLEncoder;
+import java.util.HashMap;
+import java.util.Map;
+
+public class Util {
+
+    private Util() {}
+
+    public static String qs(Map<String, String> obj) {
+        StringBuilder str = new StringBuilder();
+        for (Map.Entry<String, String> entry : obj.entrySet()) {
+            if (str.length() > 0) str.append("&");
+            try {
+                str.append(URLEncoder.encode(entry.getKey(), "UTF-8")).append("=")
+                        .append(URLEncoder.encode(entry.getValue(), "UTF-8"));
+            } catch (UnsupportedEncodingException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        return str.toString();
+    }
+
+    public static Map<String, String> qsParse(String qs) {
+        Map<String, String> qry = new HashMap<String, String>();
+        String[] pairs = qs.split("&");
+        for (String _pair : pairs) {
+            String[] pair = _pair.split("=");
+            try {
+                qry.put(URLDecoder.decode(pair[0], "UTF-8"),
+                        pair.length > 0 ? URLDecoder.decode(pair[1], "UTF-8") : "");
+            } catch (UnsupportedEncodingException e) {
+                throw new RuntimeException(e);
+            }
+
+        }
+        return qry;
+    }
+}