Libcurl reads Web page data into memory

Read the Web page data into memory through Libcurl for further processing.

Key code:

BOOL readtocontentbuff (const char* URL, string& content) {curl* conn = NULL;
  Curlcode code = Curle_failed_init;
  Char Errorbuffer[curl_error_size];
  conn = Curl_easy_init ();
  if (conn = = NULL) {goto exit_code_readtocontentbuff;
  }//code = CURL_EASY_SETOPT (conn, Curlopt_url, URL);
  If (code!= CURLE_OK) {goto exit_code_readtocontentbuff;
  }//code = CURL_EASY_SETOPT (conn, Curlopt_errorbuffer, Errorbuffer);
  If (code!= CURLE_OK) {goto exit_code_readtocontentbuff;
  }//code = CURL_EASY_SETOPT (conn, curlopt_followlocation, 1);
  If (code!= CURLE_OK) {goto exit_code_readtocontentbuff;
  }//code = CURL_EASY_SETOPT (conn, curlopt_writefunction, writer);
  If (code!= CURLE_OK) {goto exit_code_readtocontentbuff;
  }//code = CURL_EASY_SETOPT (conn, curlopt_writedata, &content);
  If (code!= CURLE_OK) {goto exit_code_readtocontentbuff;
  }//code = CURL_EASY_PERFORM (conn);
 If (code!= CURLE_OK) {   Goto Exit_code_readtocontentbuff;
  }//EXIT_CODE_READTOCONTENTBUFF:IF (conn) {CURL_EASY_CLEANUP (conn);
return (Code = = CURLE_OK); }

The specific code for the Witer function is as follows:

int writer (char *data, size_t size, size_t nmemb, String *writerdata) {
  unsigned long sizes = size * NMEMB;
  if (Writerdata = = NULL) {return
	  0;
  }
  Writerdata->append (data, sizes);
  return sizes;
}

Mylaf

2017-08-10 2010