Alright well I decided I wanted to widen my learning a bit with java and decided I was going to write a program that had to do with networking side of things.
It took me a little bit of time to come up with something, so I asked my friend and he had an idea for what I should do. That being said, I have a few questions. I'll begin by stating what I want to do and then ask the questions.
The tutorial I have read up on is located at:
http://java.sun.com/javase/6/docs/technotes/guides/net/proxies.htmlSeems pretty straight forward, which is why I have chosen it.
My friend has a site where he is testing who connects to his site, downloads which files, and at specific times. So he asked if I would write something to help him test it. I agreed as it should be a pretty good learning experience. I have little knowledge on proxies, from what I understand they allow a person to temporarily use another ip address which is what he is looking for. So from what my friend told me, I'm wanting to do the following...
I'm wanting to:
- URL = textfield1.getText();
- Open a ProxyList.txt
- Check for Proxy type and whether its a good or bad proxy
- If proxy is good, add to an array (so it can be written to a new file later)
- Change proxy if proxy can't connect after 2 attempts
- Change proxy if download was successful and download file again from a new proxy till proxyList.txt is empty (about 50 proxies)
- Use javascript to automatically click download button
Extra options:
- URL = multiple URLs at a time (perhaps through a list, text file, or arraylist)
- Different proxy per download
- Use an int to count unsuccessful attempts
- Use an int to count successful attempts
A lot of it is covered in the tutorial that I have read, but I'm still looking for advice on how you might go about completing what I'm wanting to do.
* Thus far, I have created a Proxy class that extends ProxySelector (very much like the one in the tutorial/example)
* I have also created the method that handles the bad proxies for two bad connections.
* I have created a nice simlpe GUI for it as well
* I have told him to write the javascript for his site because he is the one who coded it and should know it better than myself. I figure it shouldn't be too hard to implement some javascript in java code. Something like this should work (right?) :
public class RunScriptFile {
public static void main(String[] args) {
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("js");
try {
FileReader reader = new FileReader("yourFile.js");
engine.eval(reader);
reader.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}My attempt to make my class pull proxies from proxyList.txt looks like this:
HashMap<SocketAddress, InnerProxy> proxies = new HashMap<SocketAddress, InnerProxy>();
OpenProxy(ProxySelector def) throws FileNotFoundException {
//Save previous default
defsel = def;
//Populate the HashMap with proxies from text file
String myAddress;
String myPort;
BufferedReader reader = new BufferedReader(new FileReader("myDirectory/proxyList.txt"));
try {
while (reader.ready()) {
String proxyLines = reader.readLine();
String[] data = proxyLines.split(":" , 2);
myAddress = data[0];
myPort = data[1];
int myPortNumber = Integer.parseInt(myPort);
InnerProxy i = new InnerProxy(new InetSocketAddress(myAddress , myPortNumber));
proxies.put(i.address(), i);
}
} catch (Exception e) {
e.printStackTrace();
}
}To do list:
- Make sure I'm adding proxies from txt to HashMap correctly
- I need to change proxy after successful attempt
- Add good proxies to arraylist
- Multiple URLs/downloads at a time
- Different proxy per link
- Account for successful and unsuccessful attempts
If anyone wants to help shed some light on the tasks I would appreciate it. Any pointers, code snippets, etc are welcome. Or if you think you have a better alternative to some of the ways I'm doing things let me know.