use*_*872 5 java rest json get http-headers
我正在尝试使用经过身份验证的API请求从GDAX Exchange获取数据.我开始简单的帐户余额检查.
我一直在调整我的代码大约8个小时,似乎除了400响应之外似乎得不到任何东西.谁能帮我理解我做错了什么?
https://docs.gdax.com/#authentication
所有REST请求必须包含以下标头:
- CB-ACCESS-KEY api键作为字符串.
- CB-ACCESS-SIGN base64编码的签名(请参阅签名消息).
- CB-ACCESS-TIMESTAMP您的请求的时间戳.
- CB-ACCESS-PASSPHRASE您在创建API密钥时指定的密码.
所有请求主体都应该具有内容类型application/json并且是有效的JSON.
〜
CB-ACCESS-SIGN标头是通过在prehash字符串时间戳+ method + requestPath + body(其中+表示字符串连接)上使用base64解码的密钥创建sha256 HMAC并对输出进行base64编码来生成的.时间戳值与CB-ACCESS-TIMESTAMP头相同.
如果没有请求主体(通常用于GET请求),则主体是请求主体字符串或省略.
该方法应该是大写的.
〜
private static JSONObject getAuthenticatedData() {
try {
String accessSign = getAccess();
URL url = new URL("https://api.gdax.com/accounts");
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestMethod("GET");
con.setRequestProperty("Content-Type", "application/json");
con.setRequestProperty("CB-ACCESS-KEY", "d281dc......");
con.setRequestProperty("CB-ACCESS-SIGN", accessSign);
con.setRequestProperty("CB-ACCESS-TIMESTAMP", ""+System.currentTimeMillis() / 1000L);
con.setRequestProperty("CB-ACCESS-PASSPHRASE", "xxxxx.....");
con.setConnectTimeout(5000);
con.setReadTimeout(5000);
int status = con.getResponseCode();
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer content = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
content.append(inputLine);
}
System.out.println(content);
in.close();
con.disconnect();
}catch(Exception e) {
e.printStackTrace();
}
return null;
}
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〜
public static String getAccess() {
//Set the Secret
String secret = "xxxxxxx........";
//Build the PreHash
String prehash = Instant.now().toEpochMilli()+"GET"+"/accounts";
String hash = null;
try {
Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secret_key = new SecretKeySpec(secret.getBytes(), "HmacSHA256");
sha256_HMAC.init(secret_key);
hash = Base64.encodeBase64String(sha256_HMAC.doFinal(prehash.getBytes()));
System.out.println(hash);
}
catch (Exception e){
e.printStackTrace();
}
return hash;
}
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