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//
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//
//    * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
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//
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include <string>

class GURL;

namespace net {

// See RFC 2397 for a complete description of the 'data' URL scheme.
//
// Briefly, a 'data' URL has the form:
//
//   data:[<mediatype>][;base64],<data>
//
// The <mediatype> is an Internet media type specification (with optional
// parameters.)  The appearance of ";base64" means that the data is encoded as
// base64.  Without ";base64", the data (as a sequence of octets) is represented
// using ASCII encoding for octets inside the range of safe URL characters and
// using the standard %xx hex encoding of URLs for octets outside that range.
// If <mediatype> is omitted, it defaults to text/plain;charset=US-ASCII.  As a
// shorthand, "text/plain" can be omitted but the charset parameter supplied.
//
class DataURL {
 public:
  // This method can be used to parse a 'data' URL into its component pieces.
  //
  // The resulting mime_type is normalized to lowercase.  The data is the
  // decoded data (e.g.., if the data URL specifies base64 encoding, then the
  // returned data is base64 decoded, and any %-escaped bytes are unescaped).
  //
  // If the URL is malformed, then this method will return false, and its
  // output variables will remain unchanged.  On success, true is returned.
  //
  static bool Parse(const GURL& url,
                    std::string* mime_type,
                    std::string* charset,
                    std::string* data);
};

}  // namespace net