Hello, people. I'm seriously in need of your help. There is a system in which I am working at the university that consists of entering the academic system of the university through the requisition of protocol. I'm using the Apache Http Service classes, but despite knowing the service's effectiveness, I did not succeed on that particular site.
I know it is possible because an acquaintance from the computer department here has made an application for students with this purpose to access the system and consult notes, schedules, etc.
The process I did was already already known to install HTTPFox (or similar) and find the attributes to pass in BasicNameValuePair .
See what I'm trying to do:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
public class NavegadorSite {
public void x () {
final HttpClient client = new DefaultHttpClient();
final HttpPost post = new HttpPost(
"https://www.sigaa.ufs.br/sigaa/logar.do?dispatch=logOn");
try {
final List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
nameValuePairs.add(new BasicNameValuePair("width", "1140"));
nameValuePairs.add(new BasicNameValuePair("height", "900"));
nameValuePairs.add(new BasicNameValuePair("urlRedirect", ""));
nameValuePairs.add(new BasicNameValuePair("acao", ""));
nameValuePairs.add(new BasicNameValuePair("acessibilidade", ""));
nameValuePairs.add(new BasicNameValuePair("user.login", "unknown"));
nameValuePairs.add(new BasicNameValuePair("user.senha", ""));
post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
final HttpResponse response = client.execute(post);
final BufferedReader rd = new BufferedReader(new InputStreamReader(
response.getEntity().getContent()));
String line = "";
while ((line = rd.readLine()) != null) {
System.out.println(line);
}
} catch (final IOException e) {
e.printStackTrace();
}
}
public static void main (String[] args) {
NavegadorSite ns = new NavegadorSite();
ns.x();
}
}
I hope you can help me, because I really need to create this virtual robot to access the site and capture some information!
Below is the output from the Eclipse console. Of the sites tested, only the one that generates this type of error, consolidating, a huge frustration.
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.ssl.Alerts.getSSLException(Unknown Source)
at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
at sun.security.ssl.Handshaker.processLoop(Unknown Source)
at sun.security.ssl.Handshaker.process_record(Unknown Source)
at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:553)
at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:412)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:179)
at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:328)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:612)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:447)
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:884)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55)
at br.ufs.httpcomponents.NavegadorSite.x(NavegadorSite.java:35)
at br.ufs.httpcomponents.NavegadorSite.main(NavegadorSite.java:50)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
at sun.security.validator.Validator.validate(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
... 20 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
at java.security.cert.CertPathBuilder.build(Unknown Source)
... 26 more
To close, just one more thing I think is important: Is there anything illegal in getting information from websites that way?
For further questions I will be here to discuss. Thanks in advance.