tomcat1章1
package ex01.pyrmont; import java.net.Socket;
import java.net.ServerSocket;
import java.net.InetAddress;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
import java.io.File; public class HttpServer { /** WEB_ROOT is the directory where our HTML and other files reside.
* For this package, WEB_ROOT is the "webroot" directory under the working
* directory. 工作目錄
* The working directory is the location in the file system
* from where the java command was invoked.
*/ // D:\intelliJIDE_Project\tom4book\webroot
public static final String WEB_ROOT =
System.getProperty("user.dir") + File.separator + "webroot"; private static final String SHUTDOWN_COMMAND = "/SHUTDOWN"; private boolean shutdown = false; public static void main(String[] args) {
HttpServer server = new HttpServer();
server.await();
} public void await() {
ServerSocket serverSocket = null;
int port = 8080;
try {
serverSocket = new ServerSocket(port, 1, InetAddress.getByName("127.0.0.1"));
}
catch (IOException e) {
e.printStackTrace();
System.exit(1);
} while (!shutdown) {
Socket socket = null;
InputStream input = null;
OutputStream output = null;
try {
socket = serverSocket.accept();
input = socket.getInputStream();
output = socket.getOutputStream();//socket進socket出 Request request = new Request(input);
request.parse();//解析url Response response = new Response(output);
response.setRequest(request);
response.sendStaticResource(); //从output输出 socket.close(); shutdown = request.getUri().equals(SHUTDOWN_COMMAND);
}
catch (Exception e) {
e.printStackTrace();
continue;
}
}
}
}
package ex01.pyrmont; import java.io.InputStream;
import java.io.IOException; public class Request { private InputStream input;
private String uri; public Request(InputStream input) {
this.input = input;
} public void parse() {
StringBuffer request = new StringBuffer(2048);
int i;
byte[] buffer = new byte[2048];
try {
i = input.read(buffer);
}
catch (IOException e) {
e.printStackTrace();
i = -1;
}
for (int j=0; j<i; j++) {
request.append((char) buffer[j]); /* GET /index.html HTTP/1.1
Host: localhost:8080
Connection: keep-alive
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*;q=0.8
Accept-Encoding: gzip, deflate, br
Accept-Language: zh-CN,zh;q=0.9*/ }
System.out.print(request.toString());
uri = parseUri(request.toString());
} private String parseUri(String requestString) {
int index1, index2;
index1 = requestString.indexOf(' ');
if (index1 != -1) {
index2 = requestString.indexOf(' ', index1 + 1);
if (index2 > index1)
return requestString.substring(index1 + 1, index2);
}
return null;
} public String getUri() {
return uri;
} }
package ex01.pyrmont; import java.io.OutputStream;
import java.io.IOException;
import java.io.FileInputStream;
import java.io.File; /*
HTTP Response = Status-Line
*(( general-header | response-header | entity-header ) CRLF)
CRLF
[ message-body ]
Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF
*/ public class Response { private static final int BUFFER_SIZE = 1024;
Request request;
OutputStream output; public Response(OutputStream output) {
this.output = output;
} public void setRequest(Request request) {
this.request = request;
} public void sendStaticResource() throws IOException {
byte[] bytes = new byte[BUFFER_SIZE];
FileInputStream fis = null;
try {
File file = new File(HttpServer.WEB_ROOT, request.getUri());
if (file.exists()) {
fis = new FileInputStream(file);
int ch = fis.read(bytes, 0, BUFFER_SIZE);
while (ch!=-1) {
output.write(bytes, 0, ch);
ch = fis.read(bytes, 0, BUFFER_SIZE);
}
}
else {
String errorMessage = "HTTP/1.1 404 File Not Found\r\n" +
"Content-Type: text/html\r\n" +
"Content-Length: 23\r\n" +
"\r\n" +
"<h1>File Not Found</h1>";
output.write(errorMessage.getBytes());
}
}
catch (Exception e) {
System.out.println(e.toString() );
}
finally {
if (fis!=null)
fis.close();
}
}
}
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