1 = requestString.indexOf(' ');
if (index1 != -1) {
index2 = requestString.indexOf(' ', index1 + 1);
if (index2 > index1)
return requestString.substring(index1 + 1, index2);
}
return null;
}
public void parse() {
// Read a set of characters from the socket
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
同样的response也要实现ServletResponse接口
package ex02.pyrmont;
import java.io.OutputStream;
import java.io.IOException;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.File;
import java.io.PrintWriter;
import java.util.Locale;
import javax.servlet.ServletResponse;
import javax.servlet.ServletOutputStream;
import com.sun.org.apache.bcel.internal.generic.NEW;
public class Response implements ServletResponse {
private static final int BUFFER_SIZE = 1024;
Request request;
OutputStream output;
PrintWriter writer;
public Response(OutputStream output) {
this.output = output;
}
public void setRequest(Request request) {
this.request = request;
}
/* This method is used to serve a static page */
public void sendStaticResource() throws IOException {
byte[] bytes = new byte[BUFFER_SIZE];
FileInputStream fis = null;
try {
/* request.getUri has been replaced by request.getRequestURI */
System.out.println(Constants.WEB_ROOT+" ***** "+ request.getUri());
File file = new File(Constants.WEB_ROOT, request.getUri());
fis = new FileInputStream(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
*/
int ch = fis.read(bytes, 0, BUFFER_SIZE);
System.out.println("response **");
while (ch!=-1) {
output.write(bytes, 0, ch);
ch = fis.read(bytes, 0, BUFFER_SIZE);
}
}
catch (FileNotFoundException e) {
String errorMessage = "HTTP/1.1 404 File Not Found\r\n" +
"Content-Type: text/html\r\n" +
"Content-Length: 23\r\n" +
"\r\n" +
"File Not Found
";
output.write(errorMessage.getBytes());
}
finally {
if (fis!=null)
fis.close();
}
}
public PrintWriter getWriter() throws IOException {
// autoflush is true, println() will flush,
// but print() will not.
writer = new PrintWriter(output, true);
return writer;
}
//一样 部分代码 直接让Eclipse 自动生成即可
}
试验一下
http://localhost:8080/servlet/PrimitiveServlet
控制台显示
GET /servlet/PrimitiveServlet HTTP/1.1
Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash,
Accept-Language: zh-cn
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; SV1)
Accept-Encoding: gzip, deflate
Host: localhost:8080
Connection: Keep-Alive
PrimitiveServlet*****D:\Java Code\UpLoad\webroot file:D:\Java Code\UpLoad\webroot\
from service
大家仔细看看
Violets are blue. 这句话没有打印出来
大家看看Response类getWriter方法里的PrintWriter一行
上面的英文,我就不解释了
这个bug在以后的版本中会修改
app2
上面的代码其实还存在一个问题
在request部分中parseUri是private的,在这一节中这样其实是可以的,但问题是这个方法有可能在外部类中使用,应该是public的。
如果改成public,问题又出现了
public void service(ServletRequest request, ServletResponse response)
throws ServletException, IOException {
System.out.println("from service");
Request r=(Request) request;
System.out.println(r.par