Olá pessoal
Alguém sabe me dizer como é que faço por exemplo pra acessar uma lista de produtos de uma página… tenho essa classe … que é digamos um ponta-pé inicial… por favor se alguém puder me ajudar fico extremamente grata… é urgente!!!
import javax.microedition.midlet.;
import javax.microedition.io.;
import javax.microedition.lcdui.;
import javax.microedition.pki.;
import java.io.*;
import java.util.*;
public class HTTP extends MIDlet implements CommandListener,Runnable {
private Command sair = new Command(“Sair”, Command.EXIT, 0);
private Command buscar = new Command(“Buscar”, Command.SCREEN, 1);
private Command cabecalho=new Command(“Cabeçalho”, Command.SCREEN, 2);
// private Command voltar=new Command(“Voltar”,Command.SCREEN,0);
private Form formulario= new Form(“Busca Página”);
private TextField tf=new TextField(“Digite a página desejada”,"",60,TextField.ANY);
private TextBox t;
private Display display;
private String url;/=“http://www.cefetce.br/”/
private Command currentCommand;
private Thread commandThread;
public HTTP(){
display = Display.getDisplay(this);
}
static final void DEBUG(String s) {
if (true) {
System.out.println(s);
}
}
public void startApp() {
mainScreen();
}
void mainScreen() {
formulario.addCommand(sair);
formulario.addCommand(buscar);
formulario.addCommand(cabecalho);
formulario.append(tf);
display.setCurrent(formulario);
formulario.setCommandListener(this);
/* url=new String();
url=tf.getString();*/
}
private String time2str(long time) {
Calendar c = Calendar.getInstance(TimeZone.getTimeZone(“GMT”));
c.setTime(new Date(time));
return c.toString();
}
private void readContents(String request) {
StringBuffer b = new StringBuffer();
url=new String();
url=tf.getString();
b.append(" content of "+ request + " " + url + “\n”);
HttpConnection c = null;
OutputStream os = null;
InputStream is = null;
TextBox t = null;
try {
long len = -1;
int ch = 0;
long count = 0;
int rc;
DEBUG(request + " Page: " + url);
c = (HttpConnection)Connector.open(url);
DEBUG("c= " + c);
c.setRequestMethod(request);
c.setRequestProperty("foldedField",
"first line\r\n second line\r\n third line");
if (request == HttpConnection.POST) {
String m = "Test POST text.";
DEBUG("Posting: " + m);
os = c.openOutputStream();
os.write(m.getBytes());
os.close();
}
rc = c.getResponseCode();
if (rc != HttpConnection.HTTP_OK) {
b.append("Response Code: " + c.getResponseCode() + "\n");
b.append("Response Message: " + c.getResponseMessage() +
"\n\n");
}
is = c.openInputStream();
DEBUG("is = " + is);
if (c instanceof HttpConnection) {
len = ((HttpConnection)c).getLength();
}
DEBUG("len = " + len);
if (len != -1) {
DEBUG("Content-Length: " + len);
for (int i = 0; i < len; i++) {
if ((ch = is.read()) != -1) {
if (ch <= ' ') {
ch = ' ';
}
b.append((char) ch);
count ++;
if (count > 200) {
break;
}
}
}
} else {
byte data[] = new byte[100];
int n = is.read(data, 0, data.length);
for (int i = 0; i < n; i++) {
ch = data[i] & 0x000000ff;
b.append((char)ch);
}
}
try {
if (is != null) {
is.close();
}
if (c != null) {
c.close();
}
} catch (Exception ce) {
DEBUG("Error closing connection");
}
try {
len = is.available();
DEBUG("Inputstream failed to throw IOException after close");
} catch (IOException io) {
DEBUG("expected IOException (available())");
io.printStackTrace();
// Test to make sure available() is only valid while
// the connection is still open.,
}
t = new TextBox("Http Test", b.toString(), b.length(), 0);
is = null;
c = null;
} catch (IOException ex) {
ex.printStackTrace();
DEBUG(ex.getClass().toString());
DEBUG(ex.toString());
DEBUG("Exception reading from http");
if (c != null) {
try {
String s = null;
if (c instanceof HttpConnection) {
s = ((HttpConnection)c).getResponseMessage();
}
DEBUG(s);
if (s == null)
s = "No Response message";
t = new TextBox("Http Error", s, s.length(), 0);
} catch (IOException e) {
e.printStackTrace();
String s = e.toString();
DEBUG(s);
if (s == null)
s = ex.getClass().getName();
t = new TextBox("Http Error", s, s.length(), 0);
}
try {
c.close();
} catch (IOException ioe) {
// do not over throw current exception
}
} else {
t = new TextBox("Http Error", "Could not open URL", 128, 0);
}
} catch (IllegalArgumentException ille) {
// Check if an invalid proxy web server was detected.
t = new TextBox("Illegal Argument",ille.getMessage(), 128, 0);
}
if (is != null) {
try {
is.close();
} catch (Exception ce) {; }
}
if (c != null) {
try {
c.close();
} catch (Exception ce) {; }
}
t.addCommand(sair);
t.setCommandListener(this);
display.setCurrent(t);
}
private void readHeaders(String request) {
HttpConnection c;
TextBox t;
StringBuffer b;
url=new String();
url=tf.getString();
try {
try {
c = (HttpConnection)Connector.open(url);
} catch (IllegalArgumentException e) {
String m = e.getMessage();
t = new TextBox(“Illegal argument”, e.getMessage(), 128, 0);
display.setCurrent(t);
return;
} catch (ConnectionNotFoundException e) {
t = new TextBox(“Error”, “Protocol not supported”, 128, 0);
display.setCurrent(t);
return;
}
try {
c.setRequestMethod(request);
b = new StringBuffer();
b.append("URL: ");
b.append(c.getURL());
b.append("\nProtocol: ");
b.append(c.getProtocol());
b.append("\nHost: " + c.getHost());
b.append("\nFile: " + c.getFile());
b.append("\nRef: " + c.getRef());
b.append("\nQuery: ");
b.append(c.getQuery());
b.append("\nPort: ");
b.append(c.getPort());
b.append("\nMethod: ");
b.append(c.getRequestMethod());
// DEBUG: request DEBUG(b) ;
if (c instanceof HttpsConnection) {
// getSecurityInfo should connect
SecurityInfo sslInfo =
((HttpsConnection)c).getSecurityInfo();
Certificate cert = sslInfo.getServerCertificate();
b.append("\nSecure protocol: ");
b.append(sslInfo.getProtocolName());
b.append("\nSecure protocol version: ");
b.append(sslInfo.getProtocolVersion());
b.append("\nCipher suite: ");
b.append(sslInfo.getCipherSuite());
if (cert == null) {
b.append("\nNo server Certficate.");
} else {
b.append("\nServer certificate \n\t Type: ");
b.append(cert.getType());
b.append("\n\t Version: ");
b.append(cert.getVersion());
b.append("\n\t Serial number: ");
b.append(cert.getSerialNumber());
b.append("\n\t Issuer: ");
b.append(cert.getIssuer());
b.append("\n\t Subject: ");
b.append(cert.getSubject());
b.append("\n\t Signature algorithm: ");
b.append(cert.getSigAlgName());
b.append("\n\t Not valid before: ");
b.append(time2str(cert.getNotBefore()));
b.append("\n\t Not valid after: ");
b.append(time2str(cert.getNotAfter()));
}
}
// if not connected getResponseCode should connect
b.append("\nResponseCode: ");
b.append(c.getResponseCode());
b.append("\nResponseMessage:");
b.append(c.getResponseMessage());
b.append("\nContentLength: ");
b.append(c.getLength());
b.append("\nContentType: ");
b.append(c.getType());
b.append("\nContentEncoding: ");
b.append(c.getEncoding());
b.append("\nContentExpiration: ");
b.append(c.getExpiration());
b.append("\nDate: ");
b.append(c.getDate());
b.append("\nLast-Modified: ");
b.append(c.getLastModified());
b.append("\n\n");
// DEBUG: Reply DEBUG(b) ;
int h = 0;
while (true) {
try {
String key = c.getHeaderFieldKey(h);
if (key == null) {
break;
}
String value = c.getHeaderField(h);
b.append(key);
b.append(": ");
b.append(value);
b.append("\n");
h++;
// DEBUG: DEBUG( key + "(" + h + "): " +
// value) ;
}
catch (Exception e) {
// DEBUG: DEBUG(
// "Exception while fetching headers");
break;
}
}
t = new TextBox("Http Test", b.toString(), b.length(), 0);
// DEBUG: DEBUG (b.toString());
t.addCommand(sair);
t.setCommandListener(this);
display.setCurrent(t);
} finally {
c.close();
}
} catch (ConnectionNotFoundException e) {
t = new TextBox("Error", "Could not Connect.", 128, 0);
t.addCommand(sair);
t.setCommandListener(this);
display.setCurrent(t);
return;
} catch (CertificateException e) {
StringBuffer m = new StringBuffer(256);
String s;
Certificate cert = e.getCertificate();
m.append(e.getMessage());
if (cert != null) {
m.append("\nServer certificate \n\t Type: ");
m.append(cert.getType());
m.append("\n\t Version: ");
m.append(cert.getVersion());
m.append("\n\t Serial number: ");
m.append(cert.getSerialNumber());
m.append("\n\t Issuer: ");
m.append(cert.getIssuer());
m.append("\n\t Subject: ");
m.append(cert.getSubject());
m.append("\n\t Signature algorithm: ");
m.append(cert.getSigAlgName());
m.append("\n\t Not valid before: ");
m.append(time2str(cert.getNotBefore()));
m.append("\n\t Not valid after: ");
m.append(time2str(cert.getNotAfter()));
}
s = m.toString();
t = new TextBox("Certificate Error", s, s.length(), 0);
display.setCurrent(t);
return;
} catch (IOException ex) {
ex.printStackTrace();
}
}
public void pauseApp(){}
public void destroyApp(boolean unconditional){}
public void commandAction(Command c, Displayable s) {
synchronized (this) {
if (commandThread != null) {
return;
}
currentCommand = c;
commandThread = new Thread(this);
commandThread.start();
}
}
public void run() {
if (currentCommand == sair) {
destroyApp(false);
notifyDestroyed();
} else if (currentCommand == buscar) {
readContents(HttpConnection.GET);
} else if (currentCommand == cabecalho) {
readHeaders(HttpConnection.HEAD);
}/else if(currentCommand == voltar){
mainScreen();
}/
synchronized (this) {
commandThread = null;
}
}
}
[/code]
