web工作原理实例HowWebServersWork

package ex02.pyrmont; import java.io.InputStream; import java.io.IOException; import java.io.BufferedReader; import java.io.InputStream; import java.io.UnsupportedEncodingException; import java.util.Enumeration; import java.util.Locale; import java.util.Map; import javax.servlet.RequestDispatcher; import javax.servlet.ServletInputStream; import javax.servlet.ServletRequest; public class Request implements ServletRequest { private InputStream input; private String uri; public Request(InputStream input) { this.input = input; } public String getUri() { return uri; } 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 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<i; j++) { request.append((char) buffer[j]); } System.out.print(request.toString()); uri = parseUri(request.toString()); } /* implementation of the ServletRequest*/ public Object getAttribute(String attribute) { return null; } public Enumeration getAttributeNames() { return null; } public String getRealPath(String path) { return null; } public RequestDispatcher getRequestDispatcher(String path) { return null; } public boolean isSecure() { return false; } public String getCharacterEncoding() { return null; } public int getContentLength() { return 0; } public String getContentType() { return null; } public ServletInputStream getInputStream() throws IOException { return null; } public Locale getLocale() { return null; } public Enumeration getLocales() { return null; } public String getParameter(String name) { return null; } public Map getParameterMap() { return null; } public Enumeration getParameterNames() { return null; } public String[] getParameterValues(String parameter) { return null; } public String getProtocol() { return null; } public BufferedReader getReader() throws IOException { return null; } public String getRemoteAddr() { return null; } public String getRemoteHost() { return null; } public String getScheme() { return null; } public String getServerName() { return null; } public int getServerPort() { return 0; } public void removeAttribute(String attribute) { } public void setAttribute(String key, Object value) { } public void setCharacterEncoding(String encoding) throws UnsupportedEncodingException { } }