File content as of revision 5:791fc3dcb6c4:

/* HTTPClient.h */
/*
Copyright (C) 2012 ARM Limited.

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

/** \file
HTTP Client header file
*/

#ifndef HTTP_CLIENT_H
#define HTTP_CLIENT_H

#include "bsd_socket.h"

#define HTTP_CLIENT_DEFAULT_TIMEOUT 4000

class HTTPData;

#include "IHTTPData.h"
#include "mbed.h"

///HTTP client results
enum HTTPResult
{
  HTTP_OK, ///<Success
  HTTP_PROCESSING, ///<Processing
  HTTP_PARSE, ///<url Parse error
  HTTP_DNS, ///<Could not resolve name
  HTTP_PRTCL, ///<Protocol error
  HTTP_NOTFOUND, ///<HTTP 404 Error
  HTTP_REFUSED, ///<HTTP 403 Error
  HTTP_ERROR, ///<HTTP xxx error
  HTTP_TIMEOUT, ///<Connection timeout
  HTTP_CONN ///<Connection error
};

/**A simple HTTP Client
The HTTPClient is composed of:
- The actual client (HTTPClient)
- Classes that act as a data repository, each of which deriving from the HTTPData class (HTTPText for short text content, HTTPFile for file I/O, HTTPMap for key/value pairs, and HTTPStream for streaming purposes)
*/
class HTTPClient
{
public:
  ///Instantiate the HTTP client
  HTTPClient();
  ~HTTPClient();
  
#if 0 //TODO add header handlers
  /**
  Provides a basic authentification feature (Base64 encoded username and password)
  Pass two NULL pointers to switch back to no authentication
  @param user username to use for authentication, must remain valid durlng the whole HTTP session
  @param user password to use for authentication, must remain valid durlng the whole HTTP session
  */
  void basicAuth(const char* user, const char* password); //Basic Authentification
#endif
  
  //High Level setup functions
  /** Execute a GET request on the url
  Blocks until completion
  @param url : url on which to execute the request
  @param pDataIn : pointer to an IHTTPDataIn instance that will collect the data returned by the request, can be NULL
  @param timeout waiting timeout in ms (osWaitForever for blocking function, not recommended)
  @return 0 on success, NET error (<0) on failure
  */
  int get(const char* url, IHTTPDataIn* pDataIn, uint32_t timeout = HTTP_CLIENT_DEFAULT_TIMEOUT); //Blocking
  
  /** Execute a GET request on the url
  Blocks until completion
  This is a helper to directly get a piece of text from a HTTP result
  @param url : url on which to execute the request
  @param result : pointer to a char array in which the result will be stored
  @param maxResultLen : length of the char array (including space for the NULL-terminating char)
  @param timeout waiting timeout in ms (osWaitForever for blocking function, not recommended)
  @return 0 on success, NET error on failure
  */
  int get(const char* url, char* result, size_t maxResultLen, uint32_t timeout = HTTP_CLIENT_DEFAULT_TIMEOUT); //Blocking

  /** Execute a POST request on the url
  Blocks until completion
  @param url : url on which to execute the request
  @param dataOut : a IHTTPDataOut instance that contains the data that will be posted
  @param pDataIn : pointer to an IHTTPDataIn instance that will collect the data returned by the request, can be NULL
  @param timeout waiting timeout in ms (osWaitForever for blocking function, not recommended)
  @return 0 on success, NET error on failure
  */
  int post(const char* url, const IHTTPDataOut& dataOut, IHTTPDataIn* pDataIn, uint32_t timeout = HTTP_CLIENT_DEFAULT_TIMEOUT); //Blocking
  
  /** Get last request's HTTP response code
  @return The HTTP response code of the last request
  */
  int getHTTPResponseCode();
  
private:
  enum HTTP_METH
  {
    HTTP_GET,
    HTTP_POST,
    HTTP_HEAD
  };

  int connect(const char* url, HTTP_METH method, IHTTPDataOut* pDataOut, IHTTPDataIn* pDataIn, uint32_t timeout); //Execute request
  int recv(char* buf, size_t minLen, size_t maxLen, size_t* pReadLen); //0 on success, err code on failure
  int send(char* buf, size_t len = 0); //0 on success, err code on failure
  int parseURL(const char* url, char* scheme, size_t maxSchemeLen, char* host, size_t maxHostLen, uint16_t* port, char* path, size_t maxPathLen); //Parse URL

  //Parameters
  int m_sock;
  uint32_t m_timeout;

  const char* m_basicAuthUser;
  const char* m_basicAuthPassword;
  int m_httpResponseCode;

  struct sockaddr_in m_serverAddr;

};

//Including data containers here for more convenience
#include "data/HTTPText.h"
#include "data/HTTPMap.h"

#endif