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我有一個簡單的基於Tomcat的Java應用程序,用作一種防火牆 - 我從「外部」接收請求,將它們重新路由到「內部」的資源,並將結果返回到「外部」。Java中的HTTP連接失敗,導致重定向過多?
這適用於GETs,但我試圖爲不同的請求添加一個POST函數,我無法讓它工作。 「內部」遠程服務器受密碼保護,我無法讓遠程服務器接受認證憑證(它們適用於GET,因此證書沒問題)。相反,Tomcat服務器一遍又一遍地調用Authenticator,最後失敗。這裏是我得到的錯誤:
java.net.ProtocolException: Server redirected too many times (20)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1848)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)
at com.mystuff.house.server.MyServlet.doPost(MyServlet.java:191)
我敢肯定我在做一些愚蠢的事情,但我看不到它在哪裏。這裏的)該servlet的doPost的膽量(常規:
URL url = new URL("HTTP", "10.10.1.101", -1, "/myresource");
URLConnection con = url.openConnection();
HttpURLConnection http = (HttpURLConnection) con;
http.setRequestMethod("POST");
http.setDoOutput(true);
String encoded = String.valueOf(Base64.getEncoder().encode((a.getUsername().concat(":").concat(a.getPassword())).getBytes()));
http.setRequestProperty("Authorization", "Basic "+encoded);
http.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
// Read the POST payload from the front end post, write to back end post
InputStream r = request.getInputStream();
OutputStream os = http.getOutputStream();
int j = 0;
while ((j = r.read()) != -1) {
os.write((byte) j);
}
http.connect();
// Try reading the result from the back end, push it back to the front end
try {
InputStream i = http.getInputStream();
OutputStream o = response.getOutputStream();
// read/write bytes until EOF
j = 0;
while ((j = i.read()) != -1) {
o.write((byte) j);
}
} catch (Exception ex) {
System.out.println("AIEEEE! Error receiving page from HTTP call");
ex.printStackTrace();
}
這是服務器端的問題,而不是這個客戶端代碼,除非授權有問題。 – EJP
@EJP它確實證明是身份驗證問題。我點擊的具體URL需要一個不同的密碼。遠程服務器從未發回401或403,這正是我所期望的。如果您想將您的評論發佈爲答案,我很樂意將其標記爲正確。 – user1071914