PeeBWrAS

1import JSON.JsonObject;
2import java.io.BufferedReader;
3import java.io.DataOutputStream;
4import java.io.InputStreamReader;
5import java.net.URL;
6import java.net.URLConnection;
7import java.net.URLEncoder;
8import java.nio.charset.StandardCharsets;
9import java.security.MessageDigest;
10import java.util.Base64;
11import javax.crypto.Mac;
12import javax.crypto.spec.SecretKeySpec;
13import javax.net.ssl.HttpsURLConnection;
14
15/**
16 *
17 * @author Sampey
18 */
19
20public class HttpCryptopia {
21    
22    public String privateUrl = "https://www.cryptopia.co.nz/Api/";
23    public String publicKey = "YOUR_PUBLIC_KEY";
24    public String privateKey = "YOUR_PRIVATE_KEY";
25    
26    public HttpCryptopia(String method,String jSonPostParam) throws Exception {
27        String urlMethod = privateUrl + method;
28        String nonce     = String.valueOf(System.currentTimeMillis());
29         
30        String reqSignature = 
31                publicKey 
32                + "POST" 
33                + URLEncoder.encode(urlMethod,StandardCharsets.UTF_8.toString()).toLowerCase() 
34                + nonce 
35                + getMD5_B64(jSonPostParam);
36        
37        String AUTH = "amx " 
38                + publicKey
39                +":"
40                + this.sha256_B64(reqSignature) 
41                +":"
42                + nonce;
43
44        String response = this.continueForHttp(urlMethod, jSonPostParam,AUTH);
45        
46        System.out.println("API RESPONSE : " + response);
47    }
48    
49    private String continueForHttp(String urlMethod, String postParam,String AUTH) throws Exception {
50        URLConnection con = new URL(urlMethod).openConnection(); // CREATE POST CONNECTION
51        con.setDoOutput(true);
52        
53        HttpsURLConnection httpsConn = (HttpsURLConnection) con;
54        httpsConn.setRequestMethod("POST");
55        httpsConn.setInstanceFollowRedirects(true);
56
57        con.setRequestProperty("Authorization", AUTH);
58        con.setRequestProperty("Content-Type", "application/json");
59        
60        // WRITE POST PARAMS
61        DataOutputStream wr = new DataOutputStream(con.getOutputStream());
62        wr.writeBytes(postParam);
63        wr.flush();
64        wr.close();
65
66        // READ THE RESPONSE
67        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
68        String inputLine;
69        StringBuilder response = new StringBuilder();
70        while ((inputLine = in.readLine()) != null) {
71            response.append(inputLine);
72        }
73        in.close();
74
75        return response.toString();
76    }
77    
78    private String getMD5_B64(String postParameter) throws Exception {
79        return Base64.getEncoder().encodeToString(MessageDigest.getInstance("MD5").digest(postParameter.getBytes("UTF-8")));
80    }
81        
82    private String sha256_B64(String msg) throws Exception {
83        Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
84        SecretKeySpec secret_key = new SecretKeySpec(Base64.getDecoder().decode(privateKey), "HmacSHA256");
85        sha256_HMAC.init(secret_key);
86        return Base64.getEncoder().encodeToString(sha256_HMAC.doFinal(msg.getBytes("UTF-8")));
87    }
88    
89/*-------------------- // MAIN IS TO AUTO-EXECUTE THIS CLASS -----------------------------------*/    
90    
91    public static void main(String[] args) {
92        try {
93            // YOU CAN FORMAT THE JSON STRING USING THE LIBRARY YOU PREFER (OR MANUALLY)
94            JsonObject jo = new JsonObject();
95            jo.add("Currency", "DOT"); // EXAMPLE {"Currency":"DOT"}
96
97            new HttpCryptopia("GetBalance", jo.toString());
98        } catch (Exception e) {
99            System.out.println(e.getMessage());
100            e.printStackTrace();
101        }
102    }
103}