使用 Java HttpUrlConnection 发送带有令牌的 GET 请求

Question

我必须使用 RESTful Web 服务，该服务使用来自 Java 应用程序的基于令牌的身份验证。我可以通过这种方式成功获取token:

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public void getHttpCon() throws Exception{

String POST_PARAMS = "grant_type=password&username=someusrname&password=somepswd&scope=profile";
URL obj = new URL("http://someIP/oauth/token");
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("POST");
        con.setRequestProperty("Content-Type", "application/json;odata=verbose");
con.setRequestProperty("Authorization",
        "Basic Base64_encoded_clientId:clientSecret");
con.setRequestProperty("Accept",
        "application/x-www-form-urlencoded");

// For POST only - START
con.setDoOutput(true);
OutputStream os = con.getOutputStream();
os.write(POST_PARAMS.getBytes());
os.flush();
os.close();
// For POST only - END

int responseCode = con.getResponseCode();
System.out.println("POST Response Code :: " + responseCode);

if (responseCode == HttpURLConnection.HTTP_OK) { //success
    BufferedReader in = new BufferedReader(new InputStreamReader(
            con.getInputStream()));
    String inputLine;
    StringBuffer response = new StringBuffer();

    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();

    // print result
    System.out.println(response.toString());
} else {
    System.out.println("POST request not worked");
}
}

但是我找不到在 get 请求中正确发送此令牌的方法。我在尝试什么：

    public StringBuffer getSmth(String urlGet, StringBuffer token) throws IOException{

    StringBuffer response = null;
    URL obj = new URL(urlGet);
    HttpURLConnection con = (HttpURLConnection) obj.openConnection();
    con.setRequestMethod("GET");

    String authString = "Bearer " + Base64.getEncoder().withoutPadding().encodeToString(token.toString().getBytes("utf-8"));
    con.setRequestProperty("Authorization", authString);

    int responseCode = con.getResponseCode();
    System.out.println("GET Response Code :: " + responseCode);
    if (responseCode == HttpURLConnection.HTTP_OK) { // success
        BufferedReader in = new BufferedReader(new InputStreamReader(
                con.getInputStream()));
        String inputLine;
        response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

    } else {
        System.out.println("GET request not worked");
    }
    return response;
}

不起作用。任何解决此问题的帮助将不胜感激。

Answer 1

您应该添加令牌以请求 url:

String param = "?Authorization=" + token;
URL obj = new URL(urlGet + param);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
conn.setRequestMethod("GET");

作为替代方案，使用 restTemplate 发送获取请求：

RestTemplate restTemplate = new RestTemplate();  
HttpHeaders headers = new HttpHeaders();  
headers.add("Authorization", "Basic " + token);
HttpEntity<String> request = new HttpEntity<String>(headers);  
ResponseEntity<String> response = restTemplate.exchange(urlGet, HttpMethod.GET,  request, String.class);

Answer 2

已解决。服务器 returns 除了令牌本身之外还有一些额外的字符串。我所要做的就是从收到的答案中提取纯令牌并在没有任何编码的情况下粘贴它：String authString = "Bearer " + pure_token;

使用 Java HttpUrlConnection 发送带有令牌的 GET 请求

Send GET request with token using Java HttpUrlConnection

java

get

token

httpurlconnection

access-token