using System;
using System.Net.Http.Headers;
using System.Text;
using System.Net.Http;
using System.Web;

namespace CSHttpClientSample
{
    static class Program
    {
        static void Main()
        {
            MakeRequest();
            Console.WriteLine("Hit ENTER to exit...");
            Console.ReadLine();
        }
        
        static async void MakeRequest()
        {
            var client = new HttpClient();
            var queryString = HttpUtility.ParseQueryString(string.Empty);

            // Request headers
            client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", "{subscription key}");

            // Request parameters
            queryString["locale"] = "en";
            queryString["member"] = "{string}";
            queryString["period[from]"] = "{string}";
            queryString["period[to]"] = "{string}";
            queryString["wto_agreements[article_code]"] = "{string}";
            queryString["wto_agreements[code]"] = "{string}";
            queryString["wto_agreements[abbreviation]"] = "{string}";
            queryString["wto_agreements[official]"] = "{string}";
            queryString["wto_agreements[web_link]"] = "{string}";
            queryString["wto_agreements[name]"] = "{string}";
            queryString["non_wto_agreements[code]"] = "{string}";
            queryString["non_wto_agreements[short_name]"] = "{string}";
            queryString["non_wto_agreements[long_name]"] = "{string}";
            queryString["non_wto_agreements[web_url]"] = "{string}";
            queryString["product[hs_version]"] = "{string}";
            queryString["product[code]"] = "{string}";
            queryString["product[description]"] = "{string}";
            queryString["product[reported_product_code]"] = "{string}";
            queryString["product[interpreted]"] = "false";
            var uri = "https://api.wto.org/qr/v1/qrs?" + queryString;

            var response = await client.GetAsync(uri);
        }
    }
}	

// // This sample uses the Apache HTTP client from HTTP Components (http://hc.apache.org/httpcomponents-client-ga/)
import java.net.URI;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class JavaSample 
{
    public static void main(String[] args) 
    {
        HttpClient httpclient = HttpClients.createDefault();

        try
        {
            URIBuilder builder = new URIBuilder("https://api.wto.org/qr/v1/qrs");

            builder.setParameter("locale", "en");
            builder.setParameter("member", "{string}");
            builder.setParameter("period[from]", "{string}");
            builder.setParameter("period[to]", "{string}");
            builder.setParameter("wto_agreements[article_code]", "{string}");
            builder.setParameter("wto_agreements[code]", "{string}");
            builder.setParameter("wto_agreements[abbreviation]", "{string}");
            builder.setParameter("wto_agreements[official]", "{string}");
            builder.setParameter("wto_agreements[web_link]", "{string}");
            builder.setParameter("wto_agreements[name]", "{string}");
            builder.setParameter("non_wto_agreements[code]", "{string}");
            builder.setParameter("non_wto_agreements[short_name]", "{string}");
            builder.setParameter("non_wto_agreements[long_name]", "{string}");
            builder.setParameter("non_wto_agreements[web_url]", "{string}");
            builder.setParameter("product[hs_version]", "{string}");
            builder.setParameter("product[code]", "{string}");
            builder.setParameter("product[description]", "{string}");
            builder.setParameter("product[reported_product_code]", "{string}");
            builder.setParameter("product[interpreted]", "false");

            URI uri = builder.build();
            HttpGet request = new HttpGet(uri);
            request.setHeader("Ocp-Apim-Subscription-Key", "{subscription key}");


            // Request body
            StringEntity reqEntity = new StringEntity("{body}");
            request.setEntity(reqEntity);

            HttpResponse response = httpclient.execute(request);
            HttpEntity entity = response.getEntity();

            if (entity != null) 
            {
                System.out.println(EntityUtils.toString(entity));
            }
        }
        catch (Exception e)
        {
            System.out.println(e.getMessage());
        }
    }
}

<!DOCTYPE html>
<html>
<head>
    <title>JSSample</title>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
</head>
<body>

<script type="text/javascript">
    $(function() {
        var params = {
            // Request parameters
            "locale": "en",
            "member": "{string}",
            "period[from]": "{string}",
            "period[to]": "{string}",
            "wto_agreements[article_code]": "{string}",
            "wto_agreements[code]": "{string}",
            "wto_agreements[abbreviation]": "{string}",
            "wto_agreements[official]": "{string}",
            "wto_agreements[web_link]": "{string}",
            "wto_agreements[name]": "{string}",
            "non_wto_agreements[code]": "{string}",
            "non_wto_agreements[short_name]": "{string}",
            "non_wto_agreements[long_name]": "{string}",
            "non_wto_agreements[web_url]": "{string}",
            "product[hs_version]": "{string}",
            "product[code]": "{string}",
            "product[description]": "{string}",
            "product[reported_product_code]": "{string}",
            "product[interpreted]": "false",
        };
      
        $.ajax({
            url: "https://api.wto.org/qr/v1/qrs?" + $.param(params),
            beforeSend: function(xhrObj){
                // Request headers
                xhrObj.setRequestHeader("Ocp-Apim-Subscription-Key","{subscription key}");
            },
            type: "GET",
            // Request body
            data: "{body}",
        })
        .done(function(data) {
            alert("success");
        })
        .fail(function() {
            alert("error");
        });
    });
</script>
</body>
</html>

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    
    NSString* path = @"https://api.wto.org/qr/v1/qrs";
    NSArray* array = @[
                         // Request parameters
                         @"entities=true",
                         @"locale=en",
                         @"member={string}",
                         @"period[from]={string}",
                         @"period[to]={string}",
                         @"wto_agreements[article_code]={string}",
                         @"wto_agreements[code]={string}",
                         @"wto_agreements[abbreviation]={string}",
                         @"wto_agreements[official]={string}",
                         @"wto_agreements[web_link]={string}",
                         @"wto_agreements[name]={string}",
                         @"non_wto_agreements[code]={string}",
                         @"non_wto_agreements[short_name]={string}",
                         @"non_wto_agreements[long_name]={string}",
                         @"non_wto_agreements[web_url]={string}",
                         @"product[hs_version]={string}",
                         @"product[code]={string}",
                         @"product[description]={string}",
                         @"product[reported_product_code]={string}",
                         @"product[interpreted]=false",
                      ];
    
    NSString* string = [array componentsJoinedByString:@"&"];
    path = [path stringByAppendingFormat:@"?%@", string];

    NSLog(@"%@", path);

    NSMutableURLRequest* _request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:path]];
    [_request setHTTPMethod:@"GET"];
    // Request headers
    [_request setValue:@"{subscription key}" forHTTPHeaderField:@"Ocp-Apim-Subscription-Key"];
    // Request body
    [_request setHTTPBody:[@"{body}" dataUsingEncoding:NSUTF8StringEncoding]];
    
    NSURLResponse *response = nil;
    NSError *error = nil;
    NSData* _connectionData = [NSURLConnection sendSynchronousRequest:_request returningResponse:&response error:&error];

    if (nil != error)
    {
        NSLog(@"Error: %@", error);
    }
    else
    {
        NSError* error = nil;
        NSMutableDictionary* json = nil;
        NSString* dataString = [[NSString alloc] initWithData:_connectionData encoding:NSUTF8StringEncoding];
        NSLog(@"%@", dataString);
        
        if (nil != _connectionData)
        {
            json = [NSJSONSerialization JSONObjectWithData:_connectionData options:NSJSONReadingMutableContainers error:&error];
        }
        
        if (error || !json)
        {
            NSLog(@"Could not parse loaded json with error:%@", error);
        }
        
        NSLog(@"%@", json);
        _connectionData = nil;
    }
    
    [pool drain];

    return 0;
}

<?php
// This sample uses the Apache HTTP client from HTTP Components (http://hc.apache.org/httpcomponents-client-ga/)
require_once 'HTTP/Request2.php';

$request = new Http_Request2('https://api.wto.org/qr/v1/qrs');
$url = $request->getUrl();

$headers = array(
    // Request headers
    'Ocp-Apim-Subscription-Key' => '{subscription key}',
);

$request->setHeader($headers);

$parameters = array(
    // Request parameters
    'locale' => 'en',
    'member' => '{string}',
    'period[from]' => '{string}',
    'period[to]' => '{string}',
    'wto_agreements[article_code]' => '{string}',
    'wto_agreements[code]' => '{string}',
    'wto_agreements[abbreviation]' => '{string}',
    'wto_agreements[official]' => '{string}',
    'wto_agreements[web_link]' => '{string}',
    'wto_agreements[name]' => '{string}',
    'non_wto_agreements[code]' => '{string}',
    'non_wto_agreements[short_name]' => '{string}',
    'non_wto_agreements[long_name]' => '{string}',
    'non_wto_agreements[web_url]' => '{string}',
    'product[hs_version]' => '{string}',
    'product[code]' => '{string}',
    'product[description]' => '{string}',
    'product[reported_product_code]' => '{string}',
    'product[interpreted]' => 'false',
);

$url->setQueryVariables($parameters);

$request->setMethod(HTTP_Request2::METHOD_GET);

// Request body
$request->setBody("{body}");

try
{
    $response = $request->send();
    echo $response->getBody();
}
catch (HttpException $ex)
{
    echo $ex;
}

?>

########### Python 2.7 (for Python 3.2 please scroll) #############
import httplib, urllib, base64

headers = {
    # Request headers
    'Ocp-Apim-Subscription-Key': '{subscription key}',
}

params = urllib.urlencode({
    # Request parameters
    'locale': 'en',
    'member': '{string}',
    'period[from]': '{string}',
    'period[to]': '{string}',
    'wto_agreements[article_code]': '{string}',
    'wto_agreements[code]': '{string}',
    'wto_agreements[abbreviation]': '{string}',
    'wto_agreements[official]': '{string}',
    'wto_agreements[web_link]': '{string}',
    'wto_agreements[name]': '{string}',
    'non_wto_agreements[code]': '{string}',
    'non_wto_agreements[short_name]': '{string}',
    'non_wto_agreements[long_name]': '{string}',
    'non_wto_agreements[web_url]': '{string}',
    'product[hs_version]': '{string}',
    'product[code]': '{string}',
    'product[description]': '{string}',
    'product[reported_product_code]': '{string}',
    'product[interpreted]': 'false',
})

try:
    conn = httplib.HTTPSConnection('api.wto.org')
    conn.request("GET", "/qr/v1/qrs?%s" % params, "{body}", headers)
    response = conn.getresponse()
    data = response.read()
    print(data)
    conn.close()
except Exception as e:
    print("[Errno {0}] {1}".format(e.errno, e.strerror))

####################################

########### Python 3.2 #############
import http.client, urllib.request, urllib.parse, urllib.error, base64

headers = {
    # Request headers
    'Ocp-Apim-Subscription-Key': '{subscription key}',
}

params = urllib.parse.urlencode({
    # Request parameters
    'locale': 'en',
    'member': '{string}',
    'period[from]': '{string}',
    'period[to]': '{string}',
    'wto_agreements[article_code]': '{string}',
    'wto_agreements[code]': '{string}',
    'wto_agreements[abbreviation]': '{string}',
    'wto_agreements[official]': '{string}',
    'wto_agreements[web_link]': '{string}',
    'wto_agreements[name]': '{string}',
    'non_wto_agreements[code]': '{string}',
    'non_wto_agreements[short_name]': '{string}',
    'non_wto_agreements[long_name]': '{string}',
    'non_wto_agreements[web_url]': '{string}',
    'product[hs_version]': '{string}',
    'product[code]': '{string}',
    'product[description]': '{string}',
    'product[reported_product_code]': '{string}',
    'product[interpreted]': 'false',
})

try:
    conn = http.client.HTTPSConnection('api.wto.org')
    conn.request("GET", "/qr/v1/qrs?%s" % params, "{body}", headers)
    response = conn.getresponse()
    data = response.read()
    print(data)
    conn.close()
except Exception as e:
    print("[Errno {0}] {1}".format(e.errno, e.strerror))

####################################

require 'net/http'

uri = URI('https://api.wto.org/qr/v1/qrs')

query = URI.encode_www_form({
    # Request parameters
    'locale' => 'en',
    'member' => '{string}',
    'period[from]' => '{string}',
    'period[to]' => '{string}',
    'wto_agreements[article_code]' => '{string}',
    'wto_agreements[code]' => '{string}',
    'wto_agreements[abbreviation]' => '{string}',
    'wto_agreements[official]' => '{string}',
    'wto_agreements[web_link]' => '{string}',
    'wto_agreements[name]' => '{string}',
    'non_wto_agreements[code]' => '{string}',
    'non_wto_agreements[short_name]' => '{string}',
    'non_wto_agreements[long_name]' => '{string}',
    'non_wto_agreements[web_url]' => '{string}',
    'product[hs_version]' => '{string}',
    'product[code]' => '{string}',
    'product[description]' => '{string}',
    'product[reported_product_code]' => '{string}',
    'product[interpreted]' => 'false'
})
if query.length > 0
  if uri.query && uri.query.length > 0
    uri.query += '&' + query
  else
    uri.query = query
  end
end

request = Net::HTTP::Get.new(uri.request_uri)
# Request headers
request['Ocp-Apim-Subscription-Key'] = '{subscription key}'
# Request body
request.body = "{body}"

response = Net::HTTP.start(uri.host, uri.port, :use_ssl => uri.scheme == 'https') do |http|
    http.request(request)
end

puts response.body