使用.NET（dotnet）通过HTTPS下载文件 [英] Download file over HTTPS using .NET (dotnet)

问题描述

我想使用VB.NET（最好）或通过HTTPS下载一个文件。

I would like to download a file using VB.NET (preferably) or C# via HTTPS.

我有这个代码可以通过纯HTTP下载文件： / p>

I have this code to download a file over plain HTTP:

Dim client As WebClient = New WebClient()
Dim wp As WebProxy = New WebProxy("[IP number of our proxy server]", [port number of our proxy server])
wp.Credentials = CredentialCache.DefaultCredentials
client.Proxy = wp
client.DownloadFile("http://sstatic.net/so/img/logo.png", "c:\logo.png")

如何更改此代码以下载存储在HTTPS服务器上的文件？我想这与添加凭证或其他东西有关。

How do I change this code to download a file that is stored on an HTTPS-server? I guess it has something to do with adding credentials or something.

推荐答案

你只需要点该地址到您的HTTPS资源并通知您的凭据：

You just need to point that address to your HTTPS resource and to inform your credential:

client.Credentials = new NetworkCredential("username", "password");
client.DownloadFile("https://your.resource.here", @"localfile.jog")

您正在谈论如何登录受HTML表单登录保护的网站。我之前写过这段代码，你可以修改它登录你的远程站点： Orkut登录代码

You're talking about how to log into a site protected by a HTML form login. I wrote this code sometime ago and you could to adapt it to login into your remote site: Orkut Login Code

需要注意的事项：

• 如果这是一个ASP.NET网站，您需要首先调用它来获取 __ EVENTTARGET 和 __ EVENTARGUMENT 值，因为它们需要处理您的登录回发。如果没有，请跳过此步骤。


• 您需要确定网站用于填写用户名和密码的名称


• 您必须添加一个的CookieContainer 。它保留您的登录cookie，所以后续的呼叫使用该身份验证的上下文。


• 完成之后，您应该能够获取远程资源并下载

• If that's an ASP.NET site, you need to call it first to get __EVENTTARGET and __EVENTARGUMENT values, as they're required to process your login postback. If it's not, skip this step.
• You need to identify that names that site uses to fill your username and password
• You must to add a CookieContainer. It keeps your login cookie, so subsequent calls uses that authenticated context.
• After all that, you should be able to get your remote resource and to download it

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