Compare input values

Available in Classic and VPC

This document describes examples of using the Compare CAPTCHA image input value API.

Compare CAPTCHA image input value

This section describes API examples that compare the value of the CAPTCHA image entered by the user to the actual CAPTCHA value (string or number).

Java

The following is a Java-based sample code for the Compare CAPTCHA image input value API.

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class APIExamCaptchaNkeyResult {

    public static void main(String[] args) {
        String clientId = "YOUR_CLIENT_ID";//Application's client ID value";
        String clientSecret = "YOUR_CLIENT_SECRET";//Application's client secret value";
        try {
            String code = "1"; // Set to 0 for key issuance and 1 for CAPTCHA image comparison
            String key = "CAPTCHA_KEY"; // Key value received when issuing a CAPTCHA key
            String value = "USER_VALUE"; // CAPTCHA image character value entered by the user
            String apiURL = "https://naveropenapi.apigw.ntruss.com/captcha/v1/nkey?code=" + code +"&key="+ key + "&value="+ value;

            URL url = new URL(apiURL);
            HttpURLConnection con = (HttpURLConnection)url.openConnection();
            con.setRequestMethod("GET");
            con.setRequestProperty("X-NCP-APIGW-API-KEY-ID", clientId);
            con.setRequestProperty("X-NCP-APIGW-API-KEY", clientSecret);
            int responseCode = con.getResponseCode();
            BufferedReader br;
            if(responseCode==200) { // Successful call
                br = new BufferedReader(new InputStreamReader(con.getInputStream()));
            } else {  // Error occurred
                br = new BufferedReader(new InputStreamReader(con.getErrorStream()));
            }
            String inputLine;
            StringBuffer response = new StringBuffer();
            while ((inputLine = br.readLine()) != null) {
                response.append(inputLine);
            }
            br.close();
            System.out.println(response.toString());
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

Python

The following is a Python-based sample code for the Compare input value API.

import os
import sys
import urllib.request
client_id = "YOUR_CLIENT_ID"
client_secret = "YOUR_CLIENT_SECRET"
code = "1"
key = "YOUR_CAPTCHA_KEY"
value = "YOUR_CAPTCHA_VALUE"
url = "https://naveropenapi.apigw.ntruss.com/captcha/v1/nkey?code=" + code + "&key=" + key + "&value=" + value
request = urllib.request.Request(url)
request.add_header("X-NCP-APIGW-API-KEY-ID",client_id)
request.add_header("X-NCP-APIGW-API-KEY",client_secret)
response = urllib.request.urlopen(request)
rescode = response.getcode()
if(rescode==200):
    response_body = response.read()
    print(response_body.decode('utf-8'))
else:
    print("Error Code:" + rescode)

PHP

The following is a PHP-based sample code for the Compare input value API.

<?php
  $client_id = "YOUR_CLIENT_ID";
  $client_secret = "YOUR_CLIENT_SECRET";
  $key = "CAPTCHA_KEY";
  $code = "1";
  $value = "USER_VALUE";
  $url = "https://naveropenapi.apigw.ntruss.com/captcha/v1/nkey?code=".$code."&key=".$key."&value=".$value;
  $is_post = false;
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_POST, $is_post);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  $headers = array();
  $headers[] = "X-NCP-APIGW-API-KEY-ID: ".$client_id;
  $headers[] = "X-NCP-APIGW-API-KEY: ".$client_secret;
  curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
  $response = curl_exec ($ch);
  $status_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
  echo "status_code:".$status_code."<br />";
  curl_close ($ch);
  if($status_code == 200) {
    echo $response;
  } else {
    echo "Error content:".$response;
  }
?>

JavaScript

The following is a JavaScript-based sample code for the Compare input value API.

var express = require('express');
var app = express();
var client_id = 'YOUR_CLIENT_ID';
var client_secret = 'YOUR_CLIENT_SECRET';
var code = "1";
app.get('/captcha/result', function (req, res) {
   var api_url = 'https://naveropenapi.apigw.ntruss.com/captcha/v1/nkey?code=' + code + '&key=' + req.query.key + '&value=' + req.query.value;
   var request = require('request');
   var options = {
       url: api_url,
       headers: {'X-NCP-APIGW-API-KEY-ID':client_id, 'X-NCP-APIGW-API-KEY': client_secret}
    };
   request.get(options, function (error, response, body) {
     if (!error && response.statusCode == 200) {
       res.writeHead(200, {'Content-Type': 'text/json;charset=utf-8'});
       res.end(body);
     } else {
       res.status(response.statusCode).end();
       console.log('error = ' + response.statusCode);
     }
   });
 });
 app.listen(3000, function () {
   console.log('http://127.0.0.1:3000/captcha/result?key=캡차키&value=캡차밸류 app listening on port 3000!');
 })

C#

The following is a C#-based sample code for the Compare input value API.

using System;
using System.Net;
using System.Text;
using System.IO;

namespace NaverAPI_Guide
{
    public class APIExamCaptchaNkeyResult
    {
        static void Main(string[] args)
        {
            string code = "1"; // Set to 0 for key issuance and 1 for CAPTCHA image comparison
            string key = "KEY-INPUT";  // Key value received when issuing a CAPTCHA key
            string value = "VALUE-INPUT";  // CAPTCHA image character value entered by the user
            string url = "https://naveropenapi.apigw.ntruss.com/captcha/v1/nkey?code=" + code + "&key=" + key + "&value=" + value;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Headers.Add("X-NCP-APIGW-API-KEY-ID", "YOUR-CLIENT-ID");
            request.Headers.Add("X-NCP-APIGW-API-KEY", "YOUR-CLIENT-SECRET");
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            string status = response.StatusCode.ToString();
            if(status == "OK")
            {
                Stream stream = response.GetResponseStream();
                StreamReader reader = new StreamReader(stream, Encoding.UTF8);
                string text = reader.ReadToEnd();
                Console.WriteLine(text);
            }
            else
            {
                Console.WriteLine("Error occurrence=" + status);
            }
        }
    }
}