How to use proxy in HttpClient Java?

How do you handle proxies while using HTTP authentication?

There is only an HTTPS port.

You only want to know about the first time this user accessed the site via Firefox, so why the hell do I need Firebug for that? I mean it's Firefox! If I open Firefox already with my user/pass, I'm logged in from the beginning.

I think there must be a simple way to do what I want. If you don't allow users to select proxies with their own browser, then there is a very simple solution. In the url bar of Firefox, enter about:config, which in Firefox 3.5 and up lets you enter arbitrary settings into firefox.

You'll find a setting called security.negotiate.enable. That setting tells Firefox which protocols to negotiate on. By default, that setting is false, and the browser will use whatever settings are stored for your default http proxy. But by setting that setting to true, you allow the browser to ask Firefox to specify which protocol it will use when negotiating which proxies to use. To do this, set this value to true.

Firefox will automatically specify which http proxy (or no proxy) to use for any url. Now, if you have multiple proxy settings for single user in different browsers, you can set it to not select any proxy. The last line in about:config describes how to do that.

How to set proxy authentication in Java?

For example I want to set proxy host as IP address and I don't want.

to login the user/pass to get the connection. How can I do this? I use httpURLConnection and setProxy. First, are you sure you want to set a proxy, and not just connect over it? A proxy is for "translating" between two protocols. If you're not using HTTPS, it means you have to set up a second protocol (ie HTTP), even if you don't necessarily need to translate data. This is a lot of overhead you could avoid by just connecting straight to the site.

Even if you were to set a proxy, it might be a bit more complicated than you might think. For instance, you could set it in java.net.proxies (or perhaps com.sun.util.proxy). But the real way to do it would be with a browser, with either Firefox or IE (although it would be interesting to know what other browsers you tried and what errors you got). Setting up a proxy on a client machine is not something you'd typically expect users to be able to set up (although a Java webstart/desktop/plugin will be able to do it for you).

What is HttpClient 407 proxy authentication required?

I'm working on an ASP.

NET MVC 5 project, and I'm using System.Net.HttpClient for the HTTP requests to the API. It has been working fine until recently when I started getting the "407 Proxy Authentication Required" response. I can't see what I've changed.

Here is the code that gets the response: var client = new HttpClient();. client.BaseAddress = new Uri(requestUri); client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var response = await client.GetAsync(requestUri); var result = await response.Content.ReadAsStringAsync();
Any help would be greatly appreciated. The "407 Proxy Authentication Required" means that you're calling a service using an unauthenticated proxy (ie a server that doesn't have a username and password configured). You can either add the proxy credentials to your request (eg using an authenticated proxy) or try setting your proxy settings to use the Windows credentials (in case it's a Windows machine).