我在Ebay API上收到400錯誤的請求，我不知道為什么

Question

我正在嘗試使用Apache的HttpClient發送以下（ebay API應用程序令牌請求） POST ，盡管我的代碼看起來不錯，但我仍然不斷收到400：Bad Request錯誤。

這是代碼：

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.message.BasicNameValuePair;
import sun.misc.BASE64Encoder;

import java.io.BufferedReader;

import java.util.ArrayList;
import java.util.List;

public class OrderFileDownload {

    public static void main(String[] args) throws Exception {
            OrderFileDownload od = new OrderFileDownload();
            System.out.println(od.submitTokenRequest());
    }

    public String submitTokenRequest()  throws Exception {
        String url = "https://api.sandbox.ebay.com/identity/v1/oauth2/token";
        CloseableHttpClient client = HttpClients.createDefault();

        List<BasicNameValuePair> params = new ArrayList<>();
        params.add(new BasicNameValuePair("grant_type","client_credentials"));
        params.add(new BasicNameValuePair("redirect_uri","<RuRedirect-value>"));
        params.add(new BasicNameValuePair("scope","https://api.ebay.com/oauth/api_scope"));

        HttpPost request = new HttpPost(url);
        request.addHeader("Content-Type", "application/x-www-form-urlencoded");
        request.addHeader("Authorization","Basic " + encrypt64("<Client-Id>:<ClientSecret>"));

        HttpEntity entity = new UrlEncodedFormEntity(params);
        request.setEntity(entity);

        HttpResponse response =  client.execute(request);
        client.close();

        return response.toString();
    }

    private String encrypt64(String text) {
        BASE64Encoder enc = new BASE64Encoder();
        return enc.encode(text.getBytes());
    }
}

這是方法返回的響應：

HttpResponseProxy{HTTP/1.1 400 Bad Request [Content-Type: text/plain, Content-Length: 0] [Content-Type: text/plain,Content-Length: 0,Chunked: false]}

誰能幫我解決這個問題？

謝謝！

Answer 1

我在使用ebay API時遇到了同樣的問題，但是如果我在代碼中添加了retry，嘗試在幾分鍾后嘗試，那么它對我有用。

您也可以嘗試此操作，但我尚未找到其根本原因。

謝謝，

Parminder Singh