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/*
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Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#ifndef HTTP_STREAM_H
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#define HTTP_STREAM_H
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#include "../HTTPData.h"
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#include "mbed.h"
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/** \file
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HTTP Stream data source/sink header file
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*/
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typedef uint8_t byte;
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///HTTP Client Streaming tool
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/**
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This class allows you to stream data from the web using a persisting HTTP connection.
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To use it properly you must use a non-blocking HTTPClient method.
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*/
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class HTTPStream : public HTTPData //Streaming buf
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{
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public:
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///Instantiates the object
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HTTPStream();
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virtual ~HTTPStream();
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///Starts to read into buffer
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/**
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Passes a buffer of address @a buf and size @a size to the instance.
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When it receives data it will be stored in this buffer.
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When the buffer is full it throttles the client until this function is called again.
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*/
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void readNext(byte* buf, int size);
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///Returns whether there is data available to read
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bool readable();
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///Returns the actual length of the payload written in the buffer
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int readLen();
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virtual void clear();
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protected:
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virtual int read(char* buf, int len);
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virtual int write(const char* buf, int len);
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virtual string getDataType(); //Internet media type for Content-Type header
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virtual void setDataType(const string& type); //Internet media type from Content-Type header
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virtual bool getIsChunked(); //For Transfer-Encoding header
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virtual void setIsChunked(bool chunked); //From Transfer-Encoding header
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virtual int getDataLen(); //For Content-Length header
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virtual void setDataLen(int len); //From Content-Length header, or if the transfer is chunked, next chunk length
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private:
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byte* m_buf;
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int m_size; //Capacity
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int m_len; //Length
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};
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#endif
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