barcode generator visual basic 6 source code JSP: The Complete Reference in Java

Print QR Code ISO/IEC18004 in Java JSP: The Complete Reference

* Creates a new <CODE>RequestHandler</CODE> * for the specified client */ public RequestHandler(Socket client) { thisclient = client; } // =========================================== // Instance methods // =========================================== /** * Copies the request from the client to the server * and copies the response back to the client */ public void run() { try { // Open a socket to the web server if (host == null) host = DEFAULT_HOST; if (port <= 0) port = DEFAULT_PORT; Socket server = new Socket(host, port); // Open I/O streams to the client InputStream cin = new BufferedInputStream(clientgetInputStream()); OutputStream cout = new BufferedOutputStream(clientgetOutputStream()); // Open I/O streams to the server InputStream sin = new BufferedInputStream(servergetInputStream());

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OutputStream sout = new BufferedOutputStream(servergetOutputStream()); // Copy request line and headers from client to server, // echoing to logger if specified Stop after the // first empty line (end of headers) int contentLength = 0; StringBuffer sb = new StringBuffer(); for (;;) { // Read a byte from client // and copy it to server int c = cinread(); soutwrite(c); // Ignore CR at end of line JSP IN ACTION if (c == '\r') continue; // If LF, process the line if (c == '\n') { String line = sbtoString(); sb = new StringBuffer(); // Log the line loggerlog("C: " + line); // If this is an empty line, // there are no more headers if (linelength() == 0) break; // If it is a content length header, // save the content length

int p = lineindexOf(":"); if (p != -1) { String key = linesubstring(0, p)trim(); String value = linesubstring(p+1)trim(); if (keyequalsIgnoreCase("content-length")) contentLength = IntegerparseInt(value); } } // Otherwise, append char to string buffer else sbappend((char) c); } soutflush(); // If content length was specified, read input stream // and copy to server if (contentLength > 0) { for (int i = 0; i < contentLength; i++) { int c = cinread(); soutwrite(c); } soutflush(); } // Echo the response back to the client sb = new StringBuffer(); for (;;) { // Read a byte from server // and copy it to client int c = sinread(); coutwrite(c); // Ignore CR at end of line if (c == '\r') continue;

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// If LF, process the line if (c == '\n') { String line = sbtoString(); sb = new StringBuffer(); // Log the line loggerlog("S: " + line); // If this is an empty line, // there are no more headers if (linelength() == 0) break; } // Otherwise, append char to string buffer JSP IN ACTION else sbappend((char) c); } coutflush(); // Copy remaining bytes to client int bytesCopied = 0; for (;;) { int c = sinread(); if (c == -1) break; coutwrite(c); bytesCopied++; } if (bytesCopied > 0) coutflush(); // Close streams and sockets cinclose(); coutclose();

clientclose(); sinclose(); soutclose(); serverclose(); } catch (IOException e) { eprintStackTrace(); } } // =========================================== // Accessors // =========================================== /** * Returns the client */ public Socket getClient() { return client; } /** * Returns the logger */ public Logger getLogger() { return logger; } /** * Sets the logger * @param logger the logger */ public void setLogger(Logger logger) { thislogger = logger; }

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/** * Returns the host */ public String getHost() { return host; } /** * Sets the host * @param host the host */ public void setHost(String host) { thishost = host; } /** * Returns the port */ public int getPort() { return port; } /** * Sets the port * @param port the port */ public void setPort(int port) { thisport = port; } }

The heart of RequestHandler is its run() method, which opens a client socket to the Web server, and then opens the socket s input and output streams Likewise, it opens input and output streams for the Web client run() method then reads the request line and request headers, looking for a blank line that signals the end of the