[英]GlassFish 3 - 400 Bad Request on GET/POST/PUT/DELETE
在我的腳本中,我創建了一個小而簡單的REST客戶端。 腳本本身就是一個原型,因此代碼不是“生產有價值” - 所以忽略懶惰的catch表達式等。
有兩種類型的服務器包含我從中獲取數據的REST服務; WildFly 8.2.0或GlassFish 3.1.2.2。 這里的問題是:我的REST客戶端適用於從Wildfly服務器獲取數據,但GlassFish服務器為任何請求返回HTTP 400錯誤請求。
我可以通過Web瀏覽器訪問兩台服務器的REST服務,所以我知道它們都正常工作。 我甚至可以通過兩個服務器的套接字進行原始連接,並使用正確的數據進行響應。
那么,GlassFish不接受請求的原因是什么?
套接字連接(用於測試)
import java.net.Socket;
Socket s = new Socket("localhost", 8080);
String t = "GET /rest/appointment/appointments/search/?fromDate=2016-11-21&branchId=3 HTTP/1.1\nhost: localhost:8080\nAuthorization: Basic base64encodedUsername:PasswordHere\n\n"
OutputStream out = s.getOutputStream();
out.write(t.getBytes());
InputStream inn = s.getInputStream();
Scanner scan = new Scanner(inn);
String line;
while ((line = scan.nextLine()) != null) {
println line;
}
s.close();
REST客戶端代碼:
import groovy.json.JsonSlurper;
import javax.xml.bind.DatatypeConverter;
/*
REST-client (a very simple one)
*/
public class RESTclient {
public static Object get(URL url, Map<String, String> headers) {
return http(url, "GET", null, headers);
}
public static Object post(URL url, String data, Map<String, String> headers) {
return http(url, "POST", data, headers);
}
public static Object put(URL url, String data, Map<String, String> headers) {
return http(url, "PUT", data, headers);
}
public static Object delete(URL url, String data, Map<String, String> headers) {
return http(url, "DELETE", data, headers);
}
private static Object http(URL url, String method, String data, Map<String, String> headers) {
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
Authenticator.setDefault(new Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("username", "password".toCharArray());
}
});
connection.setRequestMethod(method);
for (String header : headers.keySet()) {
connection.setRequestProperty(header, headers.get(header));
}
if (data != null) {
connection.setRequestProperty("Content-Type", "application/json");
connection.setDoOutput(true);
OutputStream outputStream =connection.getOutputStream();
outputStream.write(data.getBytes());
}
int responseCode = connection.getResponseCode();
switch (responseCode) {
case HttpURLConnection.HTTP_NO_CONTENT:
// This happens when the server doesn't give back content, but all was ok.
return (new HashMap());
case HttpURLConnection.HTTP_OK:
InputStream inputStream = connection.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
String response = reader.readLine();
JsonSlurper parser = new JsonSlurper();
Object jsonResponse = parser.parseText(response); // This can be either a List or a Map
// Close the connection
try { connection.close(); } catch (Exception e) { /* Already closed */ }
return jsonResponse;
default:
println "response code: " + responseCode;
println connection.getResponseMessage();
println connection.getHeaderFields();
// Close the connection
try { connection.close(); } catch (Exception e) { /* Already closed */ }
return null;
}
}
}
用法:
URL appointmentSearchURL = new URL("http://localhost:8080/rest/appointment/appointments/search/?fromDate=2016-11-21&branchId=3");
Object response = RESTclient.get(appointmentSearchURL, new HashMap<String, String>());
println response;
所有打印出來的:
response code: 400
Bad Request
[null:[HTTP/1.1 400 Bad Request], Server:[GlassFish Server Open Source Edition 3.1.2.2], Connection:[close], Set-Cookie:[rememberMe=deleteMe; Path=/; Max-Age=0; Expires=Tue, 22-Nov-2016 08:43:29 GMT, SSOcookie=2a86cf4b-a772-435a-b92e-f12845dc20a2; Path=/; HttpOnly], Content-Length:[1090], Date:[Wed, 23 Nov 2016 08:43:28 GMT], Content-Type:[text/html], X-Powered-By:[Servlet/3.0 JSP/2.2 (GlassFish Server Open Source Edition 3.1.2.2 Java/Oracle Corporation/1.7)]]
null
我找到了答案! 所以,如果將來遇到同樣的問題,我會留在這里:
缺少Accept標頭,我猜服務器端只接受json內容。 我還沒有進一步研究為什么WildFly服務器沒有響應400錯誤請求,但我想WildFly會嘗試猜測/推斷傳入的數據。
所以通過添加以下內容解決了整個問題:
connection.setRequestProperty("Accept", "application/json");
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