How can I get the URL of the images that are displayed in a viewer, from a page where I do not have the php code?
The page shows different images, with different urls, but always in a
<img id="imgVisor" src="...">
How can I obtain, to use in Processing, the URLs of those images?
Thank you very much
Here is an example that I found here . The key is in URLConnection .
I hope it serves you. The code is not mine but it is easy to understand. You just have to apply it to look for you and filter the <img> tags and the src I think. I do not remember much of html.
package testurl;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.logging.Level;
import java.util.logging.Logger;
public class Testurl {
public static void main(String[] args) {
try {
//se abre la conexiòn
URL url = new URL("http://www.cambioschaco.com.py/php/chaco_cotizaciones_nuevo.php");
URLConnection conexion = url.openConnection();
conexion.connect();
//Lectura
InputStream is = conexion.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
char[] buffer = new char[1000];
//ACA EMPIEZA MI CONDICIÓN DESDE ACÁ PODES CAMBIAR VOS
int leido;
String texto = "";
while ((leido = br.read(buffer)) > 0) {
String datos = new String(buffer, 0, leido);
texto += datos;
}
//---------------------------------------------------------------
//AQUI EMPIEZA A FILTRAR EL TEXTO PARA OBTENER ETIQUETAS. PUEDES
//HACER LAS MODIFICACIONES DESDE ESTA PARTE.
//---------------------------------------------------------------
String[] tr = texto.split("<tr");
String fila = "";
for (String linea : tr) {
if (linea.contains("Dolar Americano")) {
fila = linea;
}
}
String[] td = fila.split("<td");
String columna = "";
for (String linea : td) {
if (linea.contains(",00")) {
System.out.println("---> " + linea);
int pos1 = 0;
int pos2 = 0;
String cotizacion = "";
for (int i = 0; i < linea.length(); i++) {
if (linea.substring(i, i + 1).equals(">")) {
pos1 = i;
} else if (linea.substring(i, i + 1).equals("<")) {
pos2 = i;
break;
}
}
System.out.println("---> " + linea.substring(pos1 + 1, pos2));
}
}
//FIN DE LA CONDICION
} catch (MalformedURLException ex) {
Logger.getLogger(Testurl.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(Testurl.class.getName()).log(Level.SEVERE, null, ex);
}
}
}