/home/jander/temp/etherdune/HTTPClient.h

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// EtherDune HTTP Client class
// Author: Javier Peletier <jm@friendev.com>
// Summary: Provides an easy way to query a web server
//
// Copyright (c) 2015 All Rights Reserved, http://friendev.com
//
// This source is subject to the GPLv2 license.
// Please see the License.txt file for more information.
// All other rights reserved.
//
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY 
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.


#include <ACross.h>
#include "HTTPConstants.h"
#include "TCPSocket.h"
#include <FlowScanner.h>

static const char statusCodePatternString[] PROGMEM = "HTTP/%*1d.%*1d %d%*99[^\r\n]\r\n";
static const char bodyBeginPatternString[] PROGMEM = "\r\n\r\n";

class HTTPClient : public TCPSocket
{

private:

    FlowPattern statusCodePattern;
    FlowPattern bodyBeginPattern;
    String host;
    String res;
    uint16_t DNSid;

    void onConnect();
    void onReceive(uint16_t len, const byte* data);
    void onClose();
    void onDNSResolve(uint8_t status, uint16_t identification, const IPAddress& ip);
    
protected:

    FlowScanner scanner;

public:

    uint16_t statusCode; 

    HTTPClient();
    ~HTTPClient();

    void request(const String& hostName, const String& resource, uint16_t port=80);

    virtual void onResponseReceived();
    virtual void onHeaderReceived(uint16_t len, const byte* data);
    virtual void onBodyReceived(uint16_t len, const byte* data);
    virtual void onBodyBegin();
    virtual void onResponseEnd();

};