处理GET和其他请求其实很简单,但您必须知道HTTP protocol的规格。
要做的第一件事是获取客户端的SocketInputStream
和文件的路径返回。 HTTP请求的第一行有这种形式:GET /index.html HTTP/1.1
。这里是做一个代码示例:
SocketInputStream sis = sock.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(sis));
String request = br.readLine(); // Now you get GET index.html HTTP/1.1
String[] requestParam = request.split(" ");
String path = requestParam[1];
该文件是否存在您创建一个新的File
对象和检查。如果该文件不存在,则返回一个404响应给客户端。否则,你读取文件并发送其内容返回给客户端:
PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
File file = new File(path);
if(!file.exist()){
out.write("HTTP 404") // the file does not exists
}
FileReader fr = new FileReader(file);
BufferedReader bfr = new BufferedReader(fr);
String line;
while((line = bfr.readLine()) != null){
out.write(line);
}
bfr.close();
br.close();
out.close();
下面是完整的代码摘要:
ServerSocket serverSock = new ServerSocket(6789);
Socket sock = serverSock.accept();
InputStream sis = sock.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(sis));
String request = br.readLine(); // Now you get GET index.html HTTP/1.1`
String[] requestParam = request.split(" ");
String path = requestParam[1];
PrintWriter out = new PrintWriter(sock.getOutputStream(), true);
File file = new File(path);
if (!file.exists()) {
out.write("HTTP 404"); // the file does not exists
}
FileReader fr = new FileReader(file);
BufferedReader bfr = new BufferedReader(fr);
String line;
while ((line = bfr.readLine()) != null) {
out.write(line);
}
bfr.close();
br.close();
out.close();
你写这是一个学习的过程?有许多现成的基于Java的Web服务器可用于处理HTTP请求。 – codebox
@codebox不,我对Java相当陌生。你能告诉我一些符合我需要的东西吗? – meiryo