how to read files from internet

if i post a txt file on the internet is it possible to make a program to read this file?

Yes: http://www.exampledepot.com/egs/java.net/ReadFromURL.html

Hi Guys,

I just tried your suggestion, I am getting the following exception after a couple of seconds:

java.net.ConnectException: Connection timed out: connect
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
	at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
	at java.net.Socket.connect(Socket.java:452)
	at java.net.Socket.connect(Socket.java:402)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:139)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:402)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:618)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:306)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:267)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:320)
	at sun.net.www.http.HttpClient.New(HttpClient.java:315)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:521)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:498)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:626)
	at java.net.URL.openStream(URL.java:913)
	at WebsiteReader.main(WebsiteReader.java:14)

I too want to know about this. Can anyone please help me out to resolve this exception? I am using a proxy server which requires authentication to access the internet. Is it anything to do with this?

Thanks for your help...!

zahid zubair wrote:I am using a proxy server which requires authentication to access the internet. Is it anything to do with this?

Quite likely yes. Here's a link to Sun's writeup about how to connect via proxy servers. It's possible that just implementing that will automatically deal with the authentication, but it depends on what platform your code is running on and what kind of proxy server it is and so on.

Hi,

Thanks for your response. I gone through it and was able to accomplish my task using the website given and some google search on java website.

public class WebsiteReader {
    public static void main(String[] args) {
        try {
            System.getProperties().put("proxySet", "true");
            System.getProperties().put("http.proxyHost", "my proxy ip");
            System.getProperties().put("http.proxyPort", "my proxy port");
            System.getProperties().put("proxyType", "4");

String proxyUser = "test";
            String proxyPassword = "test";
            // Next connection will be through proxy.
            URL url = new URL("http://www.google.com/");
            URLConnection urlConn = url.openConnection();

urlConn.setRequestProperty("Proxy-Authorization", "Basic "
                    + new sun.misc.BASE64Encoder().encode((proxyUser + ":" + proxyPassword).getBytes()));
            /* InputStream intt = url.openStream(); */
            BufferedReader in = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));

String str = null;
            while ((str = in.readLine()) != null) {
                System.out.println("printing--->" + str);
                // str is one line of text; readLine() strips the newline
                // character(s)
            }
            in.close();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

However, I don't understand why the proxyType is set to 4, what does it mean?

zahid zubair wrote:
However, I don't understand why the proxyType is set to 4, what does it mean?

I don't see anything about that system property in the JDK Networking Documentation. Where did you find it?
The java.net.Proxy class is probably easier to deal with than the system properties. Have a look here for an example.

While I was receiving the HTTP 407 error when I tried the code in the url posted by you, I found the resolution in http://forums.sun.com/thread.jspa?threadID=500360

zahid zubair wrote:While I was receiving the HTTP 407 error when I tried the code in the url posted by you

I'm not Ulf or Paul

I can't find any references to the "http.proxyType" property. The links in that thread don't mention it. The original poster says he got it from another thread, but searching that forum only brings up his post. I think he imagined it.

Likewise there isn't anything about

in that documentation either.

You'll find that it makes no difference whether you use this system property or not, because it isn't used by any of the JRE code. It's a bogus property, in other words, which somebody thought up years ago and it's been copied from one internet site to another without anybody checking it.

Oh. Is it so!!! Thanks for making me aware guys. However, my code copying mistake might have made others aware as well.