Question

我创建了一个java服务器应用程序，它将接受GET请求并将文件返回给浏览器。此外，文件将使用header中的“content-disposition：attachment”下载到目录中。但这只是作为文件下载，我想作为文件夹下载并将其映射到本地目录。例如 localhost：8080 / xyz.jpg给你一个图像。但是localhost：8080 / src / xyz.jpg应该下载为src文件夹，里面有一个图像，例如：downloads / src / xyz.jpg。目前，如果我这样做，它只下载为文件。既然你们问过。这是我使用的示例代码:)。谢谢

import java.io.*;
import java.net.*;
import java.util.*;

public class myHTTPServer extends Thread {

    static final String HTML_START =
            "<html>" +
                    "<title>HTTP Server in java</title>" +
                    "<body>";

    static final String HTML_END =
            "</body>" +
                    "</html>";

    Socket connectedClient = null;
    BufferedReader inFromClient = null;
    DataOutputStream outToClient = null;


    public myHTTPServer(Socket client) {
        connectedClient = client;
    }

    public void run() {

        try {

            System.out.println( "The Client "+
                    connectedClient.getInetAddress() + ":" + connectedClient.getPort() + " is connected");

            inFromClient = new BufferedReader(new InputStreamReader (connectedClient.getInputStream()));
            outToClient = new DataOutputStream(connectedClient.getOutputStream());

            String requestString = inFromClient.readLine();
            String headerLine = requestString;

            StringTokenizer tokenizer = new StringTokenizer(headerLine);
            String httpMethod = tokenizer.nextToken();
            String httpQueryString = tokenizer.nextToken();

            StringBuffer responseBuffer = new StringBuffer();
            responseBuffer.append("<b> This is the HTTP Server Home Page.... </b><BR>");
            responseBuffer.append("The HTTP Client request is ....<BR>");

            System.out.println("The HTTP request string is ....");
            while (inFromClient.ready())
            {
                // Read the HTTP complete HTTP Query
                responseBuffer.append(requestString + "<BR>");
                System.out.println(requestString);
                requestString = inFromClient.readLine();
            }

            if (httpMethod.equals("GET")) {
                if (httpQueryString.equals("/")) {
                    // The default home page
                    sendResponse(200, responseBuffer.toString(), false);
                } else {
//This is interpreted as a file name
                    String fileName = httpQueryString.replaceFirst("/", "");
                    fileName = URLDecoder.decode(fileName);
                    if (new File(fileName).isFile()){
                        sendResponse(200, fileName, true);
                    }
                    else {
                        sendResponse(404, "<b>The Requested resource not found ...." +
                                "Usage: http://127.0.0.1:5000 or http://127.0.0.1:5000/</b>", false);
                    }
                }
            }
            else sendResponse(404, "<b>The Requested resource not found ...." +
                    "Usage: http://127.0.0.1:5000 or http://127.0.0.1:5000/</b>", false);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void sendResponse (int statusCode, String responseString, boolean isFile) throws Exception {

        String statusLine = null;
        String serverdetails = "Server: Java HTTPServer";
        String contentLengthLine = null;
        String fileName = null;
        String contentTypeLine = "Content-Type: text/html" + "\r\n";
        String Content_disposition="Content-Disposition: attachment; filename='src/fname.ext'";

        FileInputStream fin = null;

        if (statusCode == 200)
            statusLine = "HTTP/1.1 200 OK" + "\r\n";
        else
            statusLine = "HTTP/1.1 404 Not Found" + "\r\n";

        if (isFile) {
            fileName = responseString;
            fin = new FileInputStream(fileName);
            contentLengthLine = "Content-Length: " + Integer.toString(fin.available()) + "\r\n";
            if (!fileName.endsWith(".htm") && !fileName.endsWith(".html"))
                contentTypeLine = "Content-Type: \r\n";
        }
        else {
            responseString = myHTTPServer.HTML_START + responseString + myHTTPServer.HTML_END;
            contentLengthLine = "Content-Length: " + responseString.length() + "\r\n";
        }

        outToClient.writeBytes(statusLine);
        outToClient.writeBytes(serverdetails);
        outToClient.writeBytes(contentTypeLine);
        outToClient.writeBytes(contentLengthLine);
        outToClient.writeBytes(Content_disposition);
        outToClient.writeBytes("Connection: close\r\n");
        outToClient.writeBytes("\r\n");

        if (isFile) sendFile(fin, outToClient);
        else outToClient.writeBytes(responseString);

        outToClient.close();
    }

    public void sendFile (FileInputStream fin, DataOutputStream out) throws Exception {
        byte[] buffer = new byte[1024] ;
        int bytesRead;

        while ((bytesRead = fin.read(buffer)) != -1 ) {
            out.write(buffer, 0, bytesRead);
        }
        fin.close();
    }

    public static void main (String args[]) throws Exception {

        ServerSocket Server = new ServerSocket (5000, 10, InetAddress.getByName("127.0.0.1"));
        System.out.println ("TCPServer Waiting for client on port 5000");

        while(true) {
            Socket connected = Server.accept();
            (new myHTTPServer(connected)).start();
        }
    }
}

Answer 1

您无法使用HTTP协议和普通浏览器执行此操作，文件夹没有MIME类型。您的浏览器只能下载文件。

如果您想通过HTTP：

执行此操作

选项1：生成＆＃34; zip＆＃34;文件（或其他一些使您能够将文件夹树打包成单个文件的格式），其中包含文件夹树并将其发送到浏览器。

选项2：开发一个自定义客户端程序，该程序能够解释从服务器获取的响应并在本地文件系统上创建相应的文件夹。

将文件目录从java服务器映射到本地计算机

1 个答案: