RestTemplate 和 Cookie

使用 RestTemplate 和 Cookie 发起网络请求

java
RestTemplate restTemplate = new RestTemplate();
String url = "http://example.com/api/users";
String response = restTemplate.getForObject(url, String.class);
System.out.println(response);

java
RestTemplate restTemplate = new RestTemplate();
String url = "http://example.com/api/users";
MultiValueMap requestBody = new LinkedMultiValueMap<>();
requestBody.add("username", "john");
requestBody.add("password", "123456");
String response = restTemplate.postForObject(url, requestBody, String.class);
System.out.println(response);

java
RestTemplate restTemplate = new RestTemplate();
String url = "http://example.com/api/users";
HttpHeaders headers = new HttpHeaders();
headers.add("Cookie", "sessionId=abcdefg");
HttpEntity entity = new HttpEntity<>(headers);
ResponseEntity response = restTemplate.exchange(url, HttpMethod.GET, entity, String.class);
System.out.println(response.getBody());

java
RestTemplate restTemplate = new RestTemplate();
String loginUrl = "http://example.com/api/login";
String homeUrl = "http://example.com/api/home";
// 发送登录请求
MultiValueMap loginRequestBody = new LinkedMultiValueMap<>();
loginRequestBody.add("username", "john");
loginRequestBody.add("password", "123456");
String loginResponse = restTemplate.postForObject(loginUrl, loginRequestBody, String.class);
// 解析登录响应的 Set-Cookie 头部字段
HttpHeaders loginHeaders = restTemplate.headForHeaders(loginUrl);
List setCookieHeaders = loginHeaders.get("Set-Cookie");
if (setCookieHeaders != null && !setCookieHeaders.isEmpty()) {
    // 获取 sessionId
    String sessionId = setCookieHeaders.get(0).split(";")[0].split("=")[1];
    
    // 发送带有 Cookie 的请求
    HttpHeaders homeHeaders = new HttpHeaders();
    homeHeaders.add("Cookie", "sessionId=" + sessionId);
    HttpEntity homeEntity = new HttpEntity<>(homeHeaders);
    ResponseEntity homeResponse = restTemplate.exchange(homeUrl, HttpMethod.GET, homeEntity, String.class);
    System.out.println(homeResponse.getBody());
}