Example

Example

// Description: Preformator API usage example.
// Copyright: (C) 2015 EffectiveSoft Ltd. All Rights Reserved.
// Technical support: technical-support@effective-soft.com
// This example requires the libcurl and jsoncpp libraries.

#include <iostream>
#include "curl/curl.h"
#include "json/json.h"

using namespace std;

// libcurl write callback function
static int writer(char *data, size_t size, size_t nmemb,
				  std::string *writerData)
{
	if (writerData == NULL)
		return 0;
	writerData->append(data, size*nmemb);
	return size * nmemb;
}

int main(int argc, char* argv[])
{
	CURL *curl = NULL;
	CURLcode res;

	// returned data from Intellexer API
	std::string results;
	// libcurl connection initialization
	curl = curl_easy_init();
	if (curl == NULL)
	{
		std::cerr << "Failed to create CURL connection\n";
		return EXIT_FAILURE;
	}
	if(curl) 
	{
		// set the URL for GET request, specify the url for information extraction and API key for authorization purposes (change YourAPIKey to the Intellexer API key)
		curl_easy_setopt(curl, CURLOPT_URL, "http://api.intellexer.com/parse?apikey=YourAPIKey&url=http://www.euronews.com/2012/01/02/ailing-mubarak-back-in-court/&useCache=false");
		// set option to the callback function
		curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writer);
		// set option for writing received data
		curl_easy_setopt(curl, CURLOPT_WRITEDATA, &results);
		// perform the request
		res = curl_easy_perform(curl);
		// error checking
		if(res != CURLE_OK)
			std::cerr << "curl_easy_perform() failed: " << curl_easy_strerror(res) << "\n";
		else
		{
			// parse JSON results
			Json::Value root;
			Json::Reader reader;
			bool isSuccess = reader.parse(results,	root, false);
			if (isSuccess)
			{
				// print document information
				const Json::Value structure = root["structure"];
				std::cout << "Document structure: " << structure.asString();
				const Json::Value topics = root["topics"];
				std::cout << "\nDocument topics: ";
				for (unsigned int i = 0; i < topics.size(); ++i)
					std::cout << topics[i].asString() << " ";
				const Json::Value lang = root["lang"];
				std::cout << "\nDocument language: " << lang.asString();
				const Json::Value text = root["text"];
				std::cout << "\nDocument plain text:\n" << text.asString();
			}
			else
			{
				std::cerr << "JSON parsing error\n";
				return EXIT_FAILURE;
			}
		}
		//cleanup
		curl_easy_cleanup(curl);
	}
	//global cleanup
	curl_global_cleanup();
	return 0;
}

Output

Document structure: NewsArticle
Document topics: Social.politics 
Document language: English
Document plain text:
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17/08/2015

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02/01/12 14:07 CET

The former Egyptian president Hosni Mubarak has been back in court after a two month delay in his trial over the deaths of hundreds of anti-government protesters. The ousted leader, whose doctors claim is suffering from heart problems, arrived at the Cairo tribunal on a stretcher.

He is accused of corruption and complicity in the killings of opponents during the uprising against his rule.

A judge, who some lawyers called to be dismissed over doubts about his impartiality, has been retained. That has fuelled demonstrations outside the court by anti-Mubarak protesters.

Their anger has been heightened by the recent acquittal of five policemen on charges of killing five protesters during the revolt.

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