ConvertToInt converts given string to int.

ConvertToUint converts given string to uint.

IsNumeric judges whether given string is numeric or not.

NewRequestBuilder is constructor.

ReadPropertiesFile reads a properties file and it returns a map has the keys and values in the file.

CommentChar represents that the line is the comment line.

EqualsChar represents that the equals symbol.

RequestBuilder builds request URL.

RequestURL is the element to compose request url.