[英]Java Proxy - Can't receive response from host/Socket issue
我正在編寫一個簡單的Java代理。 給出了一般的體系結構(方法簽名等),這是Main類的外觀:
private static Socket clientSocket;
private static ServerSocket client;
private static int myPort;
public static void init(int port) throws IOException {
client = new ServerSocket(port);
clientSocket = client.accept();
}
public static void handle(Socket clientSocket) {
try {
BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
HttpRequest httpRequest = new HttpRequest(in);
String hostname = httpRequest.getHost();
//443 hardcoded from reading the http headers.
//Testing using isitchristmas.com
Socket serverSocket = new Socket(hostname, 443);
BufferedReader out = new BufferedReader(new InputStreamReader(serverSocket.getInputStream()));
HttpResponse httpResponse = new HttpResponse(out);
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String args[]) {
try {
myPort = Integer.parseInt(args[0]);
try {
System.out.println("Initializing socket...");
init(myPort);
} catch (IOException e) {
System.out.println("[ERROR]: " + e.getMessage());
}
handle(clientSocket);
} catch (Exception e) {
System.out.println("[ERROR]: " + e.getMessage());
}
}
但是,在讀取HttpResponse
類時,控制台將掛起並且永遠不會完成請求:
public HttpResponse(BufferedReader fromServer) throws IOException {
String line;
String statusLine = "";
// Never goes past here
while ((line = fromServer.readLine()) != null) {
if (line.isEmpty()) {
break;
}
if (line.toLowerCase().contains("status")) {
statusLine = line;
}
response.append(line);
}
if (!response.toString().isEmpty()) {
getDataAndHeadersFromResponse(response.toString());
System.out.println("\n\nHTTP Response:\n");
System.out.println("Status Line: " + statusLine);
System.out.println("Header Lines: " + headerLines + "\n\n");
System.out.println("Data: " + data);
}
}
我懷疑這與我創建套接字的方式有關...在ServerSocket
上不調用close()
會釋放出一個已在使用的地址:JVM_Bind異常。 我似乎也沒有正確獲得serverSocket參數。 正如您現在所知道的,我對套接字編程不是很精通。 怎么了
BufferedReader
解決此問題,因為您必須計算字節而不是字符。 \\r\\n
,而不是\\n
。 作業不足:
BufferedReader
DataInputStream
DataInputStream
: InputStream
就足夠了 學生應該抱怨。
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