developer.intra2net.com Git - bpdyndnsd/blob - src/httphelper.cpp

   1 /** @file
   2  * @brief HTTPHelper class implementation. This class represents a Helper to perform HTTP operations easily.
   3  *
   4  *
   5  *
   6  * @copyright Intra2net AG
   7  * @license GPLv2
   8 */
   9
  10 #include "httphelper.h"
  11
  12 HTTPHelper::HTTPHelper()
  13     : Proxy("")
  14     , ProxyPort(0)
  15     , Log(new Logger)
  16 {
  17 }
  18
  19 HTTPHelper::HTTPHelper(Logger::Ptr _log, string _proxy, int _proxy_port)
  20 {
  21     Log = _log;
  22     Proxy = _proxy;
  23     ProxyPort = _proxy_port;
  24     CurlEasyHandle = init_curl(CurlWritedataBuff, CurlErrBuff);
  25 }
  26
  27
  28 HTTPHelper::~HTTPHelper()
  29 {
  30 }
  31
  32
  33
  34 /**
  35  * Perform a HTTP GET operation
  36  * @param url URL for HTTP GET operation
  37  * @return The data GET from the URL
  38  */
  39 string HTTPHelper::http_get(const string& url)
  40 {
  41     int curl_err_code;
  42
  43     set_curl_url(url);
  44
  45     if ( (curl_err_code = curl_easy_perform(CurlEasyHandle) ) != 0 )
  46     {
  47         // TODO: Logging errors
  48         return "";
  49     }
  50     // Operation performed without any problems so we can return the CurlWritedataBuff
  51     return CurlWritedataBuff;
  52 }
  53
  54
  55 /**
  56  * Initialized curl easy handle with a few options.
  57  * @param curl_writedata_buff Reference to a string wich will be filled with the curl result
  58  * @param curl_err_buff A pointer to an char array which will be filled with error message.
  59  * @return A pointer to the easy curl handle.
  60  */
  61 CURL* HTTPHelper::init_curl(string& curl_writedata_buff,char* curl_err_buff) const
  62 {
  63     CURL *curl_easy_handle = curl_easy_init();
  64
  65     curl_easy_setopt(curl_easy_handle,CURLOPT_NOPROGRESS,1);
  66     curl_easy_setopt(curl_easy_handle,CURLOPT_CONNECTTIMEOUT,5);
  67     curl_easy_setopt(curl_easy_handle,CURLOPT_TIMEOUT,10);
  68     curl_easy_setopt(curl_easy_handle,CURLOPT_BUFFERSIZE,1024);
  69     curl_easy_setopt(curl_easy_handle,CURLOPT_ERRORBUFFER,curl_err_buff);
  70     curl_easy_setopt(curl_easy_handle,CURLOPT_WRITEFUNCTION,http_receive);
  71     curl_easy_setopt(curl_easy_handle,CURLOPT_WRITEDATA,&curl_writedata_buff);
  72
  73     if ( !Proxy.empty() )
  74     {
  75         curl_easy_setopt(curl_easy_handle,CURLOPT_PROXY,Proxy.c_str());
  76         curl_easy_setopt(curl_easy_handle,CURLOPT_PROXYPORT,ProxyPort);
  77     }
  78
  79     return curl_easy_handle;
  80 }
  81
  82
  83 /**
  84  * Sets a url to the easy curl handle
  85  * @param url The url to set.
  86  */
  87 void HTTPHelper::set_curl_url(const string& url)
  88 {
  89     curl_easy_setopt(CurlEasyHandle,CURLOPT_URL,url.c_str());
  90 }
  91
  92
  93 /**
  94  * Callback Function is called every time CURL is receiving data from HTTPS-Server and will copy all received Data to the given stream pointer
  95  * @param inBuffer Pointer to input.
  96  * @param size How many mem blocks are received
  97  * @param nmemb size of each memblock
  98  * @param outBuffer Pointer to output stream.
  99  * @return The size received.
 100  */
 101 int HTTPHelper::http_receive( char *inBuffer, size_t size, size_t nmemb, string *outBuffer )
 102 {
 103     outBuffer->append(inBuffer);
 104     return (size*nmemb);
 105 }
 106