IHTTPData.h

00001 /* IHTTPData.h */
00002 /* Copyright (C) 2012 mbed.org, MIT License
00003  *
00004  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
00005  * and associated documentation files (the "Software"), to deal in the Software without restriction,
00006  * including without limitation the rights to use, copy, modify, merge, publish, distribute,
00007  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
00008  * furnished to do so, subject to the following conditions:
00009  *
00010  * The above copyright notice and this permission notice shall be included in all copies or
00011  * substantial portions of the Software.
00012  *
00013  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
00014  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00015  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
00016  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00017  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00018  */
00019 
00020 #ifndef IHTTPDATA_H
00021 #define IHTTPDATA_H
00022 
00023 #include <cstring>
00024 
00025 using std::size_t;
00026 
00027 ///This is a simple interface for HTTP data storage (impl examples are Key/Value Pairs, File, etc...)
00028 class IHTTPDataOut
00029 {
00030 protected:
00031   friend class HTTPClient;
00032   
00033   /** Reset stream to its beginning 
00034    * Called by the HTTPClient on each new request
00035    */
00036   virtual void readReset() = 0;
00037 
00038   /** Read a piece of data to be transmitted
00039    * @param buf Pointer to the buffer on which to copy the data
00040    * @param len Length of the buffer
00041    * @param pReadLen Pointer to the variable on which the actual copied data length will be stored
00042    */
00043   virtual int read(char* buf, size_t len, size_t* pReadLen) = 0;
00044   
00045   /** Get MIME type
00046    * @param type Internet media type from Content-Type header
00047    */
00048   virtual int getDataType(char* type, size_t maxTypeLen) = 0; //Internet media type for Content-Type header
00049   
00050   /** Determine whether the HTTP client should chunk the data
00051    *  Used for Transfer-Encoding header
00052    */
00053   virtual bool getIsChunked() = 0;
00054   
00055   /** If the data is not chunked, get its size
00056    *  Used for Content-Length header
00057    */
00058   virtual size_t getDataLen() = 0;
00059 
00060 };
00061 
00062 ///This is a simple interface for HTTP data storage (impl examples are Key/Value Pairs, File, etc...)
00063 class IHTTPDataIn
00064 {
00065 protected:
00066   friend class HTTPClient;
00067 
00068   /** Reset stream to its beginning 
00069    * Called by the HTTPClient on each new request
00070    */
00071   virtual void writeReset() = 0;
00072 
00073   /** Write a piece of data transmitted by the server
00074    * @param buf Pointer to the buffer from which to copy the data
00075    * @param len Length of the buffer
00076    */
00077   virtual int write(const char* buf, size_t len) = 0;
00078 
00079   /** Set MIME type
00080    * @param type Internet media type from Content-Type header
00081    */
00082   virtual void setDataType(const char* type) = 0;
00083 
00084   /** Determine whether the data is chunked
00085    *  Recovered from Transfer-Encoding header
00086    */
00087   virtual void setIsChunked(bool chunked) = 0;
00088   
00089   /** If the data is not chunked, set its size
00090    * From Content-Length header
00091    */
00092   virtual void setDataLen(size_t len) = 0;
00093 
00094 };
00095 
00096 #endif