Return 0 from HTTP

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I’m having a bit of a strange problem..

I need to return the status of some web addresses to the application, so I used the code below:

The algorithm, takes as a parameter a URL, then returns me the HTTP status. If so 200, I know you’re all right, if not, I’ll deal with it depending on the return.. Well, when I pass as parameters some specific sites it returns me the value 0 (Which is no HTTP status)

Could someone help me ?

Follow the code: 

public static Integer verificarSistema(String enderecoUrl){
    Integer code =0;
    try {
        URL url = new URL(enderecoUrl);

        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        code = urlConnection.getResponseCode();   
        BufferedReader in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
        in.close();
        urlConnection.disconnect();
    } catch (MalformedURLException e){
        System.out.println("Erro ao criar URL. Formato inválido.");
    } catch (IOException e2) {     
    }
    return code;
}
java http

  • Change your variable code to 3 and test with a site that was previously returning 0. Return works or becomes three?

  • Hello Lucas, I changed. and the return became 3

2 answers

1

Then, as we saw in the comment, the returned error changes as a function of the initially fed value. There is no HTTP error with code 0 or 3. The numbers you are viewing are returned by your code or your library. You need to check the documentation and perform a debug to see when it happens.

Try doing this with a site that you know works and returns 200. Then see with one that you know doesn’t work.

I would venture to say that it may be a syntax error, or even in the URL, since to return 0 it would not even enter the block try-catch

0


I managed to solve the problem..

It turns out that in the company where I work, there were network blocks for certain addresses, so it was not possible to make the connection

Thank you all

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