WebClient to be able to do multiple requests

Question

I am making requests to a web site that is using a SSL certificate. Therefore if I do:

            var webClient = new WebClient();
            webClient.DownloadData("https://link1");  // 1
            webClient.DownloadData("https://link2");  // 2

In both scenarios I am exchanging public and private keys because webclient does not save session right?

Then I believe I need a WebClient class that is cookie aware. So I googled for that and I came up with: https://stackoverflow.com/a/11523836/637142

If I use that class and do:

            var webClient2 = new WebClientEx(); // this class is on the link
            webClient2.DownloadData("https://link1"); // 1
            webClient2.DownloadData("https://link2"); // 2

Now I will not have to exchange public and private keys the second time right?

Anyways here is my problem now I need to be able to do:

            var webClient2 = new WebClientEx(); // this class is on the link
            Task.Fatory.StartNew(()=>
                webClient2.DownloadData("https://link1"); // 1
            );
            Task.Fatory.StartNew(()=>
                webClient2.DownloadData("https://link2"); // 2
            );

That throws an exception because WebClient can only download data at once. As a result I have done:

            Task.Fatory.StartNew(()=>
                new WebClient().DownloadData("https://link1"); // 1
            );
            Task.Fatory.StartNew(()=>
                new WebClient().DownloadData("https://link2"); // 2
            );

That works but its not efficient because for every request I will be exchanging public and private keys

PS: Note I know very little about SSL therefore please correct me if I assume something that is wrong. Perhaps SSL does not use a session in order to maintain symmetric keys. In other words I do not understand why only the first request in the web browser is the one that takes a long time. After the first request all are fast. I assume the symmetric key is stored in the session.

`WebClient` can only make one request at a time. If you want multiple concurrent downloads, you have to use multiple `WebClient` instances. — Jim Mischel, Feb 25 '14 at 23:19

score 0 · Answer 1 · answered Aug 28 '14 at 01:59

0

if you want to use the same session ,you can use the cookiecontainer, you can new WebclienEx(CookieContainer), every webclient instance use the same cookiecontainer to use the same session.

answered Aug 28 '14 at 01:59

user1939231

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WebClient to be able to do multiple requests

1 Answers1