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I want to send a POST request with a JSON object to a specified URL, but it always failed.

I have already check every data to make sure they are correct, but when I send them, they seems to be changed, so that the destination server cannot process my request correctly.

 public static String translate(String query, String from, String to) {
    JSONObject response = new JSONObject();
    JSONObject request = new JSONObject();

    //Generate a random number
    int salt = getRandom();

    //Generate the sign
    String sign = encodeMD5Hex(APP_ID + query + salt + KEY);

    //Put all parameters into the request
    request.put("q", query);
    request.put("from", from);
    request.put("to", to);
    request.put("appid", APP_ID);
    request.put("salt", salt);
    request.put("sign", sign);

    return sendPOSTRequest(request);
}

private static String encodeMD5Hex(String data){
    return DigestUtils.md5Hex(data);
}

private static int getRandom() {
    return (int) ((Math.random() + 1) * 10000);
}

private static String sendPOSTRequest(JSONObject data) {
    RestTemplate restTemplate = new RestTemplate();
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_JSON);

    HttpEntity<JSONObject> entity = new HttpEntity(data, headers);
    String answer = restTemplate.postForObject(BAIDU_TRANS_API_URL, entity, String.class);
    return answer;
}

I guess it's probably wrong in appid. Response always tell me I have a incorrect appid even I have 100% sure it's correct. And here is the format of appid parameter: name: appid type: INT But a 17 digits number's int is totally out of range.

Response: {"error_code":"52003","error_msg":"UNAUTHORIZED USER"}

Nick Lin
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  • Please provide the full response (or exception) in your question. – user871611 Feb 13 '19 at 11:26
  • Possible duplicate of [Call another rest api from my server in Spring-Boot](https://stackoverflow.com/questions/42365266/call-another-rest-api-from-my-server-in-spring-boot) – TongChen Feb 13 '19 at 11:30
  • What is the data type of your APP_ID? if its 17 digits, why not declare it as Long instead of Int. Anyway JSON object only has Number as datatype so Int or Long it will go same way. – Arpit Agrawal Feb 13 '19 at 11:33
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    You should let Spring inject the properly-configured RestTemplate, not make a new one for every request. – OrangeDog Feb 13 '19 at 11:37

1 Answers1

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JSONObject will accept value of type object so you can convert the appId value to long or any other data types that is accepted in the remote http call.

Sumit datta
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