Win32中用于本机C / C ++的高级HTTP客户端库 [英] High-level HTTP client library for native C/C++ in Win32

问题描述

在Win32中是否没有用于本机C / C ++的高级HTTP库，或者我只是在错误的位置查找？

Are there no "high-level" HTTP libraries for native C/C++ in Win32 or am I just looking in the wrong places?

按高级 我的意思是一个API，它允许我在C ++中使用与.NET框架大致相同的抽象级别来执行HTTP Web请求/响应（但请注意，使用C ++ / CLI不是我的选项）。

By "high-level" I mean an API that lets me do HTTP web requests/responses in C++ with "about the same" abstraction level as the .NET framework (but note that using C++/CLI is not an option for me).

如何在不使用.NET的情况下在Win32中的C / C ++中执行此类操作（具有大约相同数量的代码）？作为参考，我包含一个代码示例，以显示我如何在C＃中执行此操作。

How to do something like this (with about the same amount of code) in C/C++ in Win32 without using .NET? As a reference, I include a code sample to show how I'd do it in C#.

byte[] fileBytes = null;
bool successfulDownload = false;
using (WebClient client = new WebClient())
{
    WebProxy proxy = WebProxy.GetDefaultProxy();
    client.Proxy = proxy;
tryAgain:
    try
    {
        fileBytes = client.DownloadData(fileUrl);
        successfulDownload = true;
    }
    catch (WebException wEx)
    {
        if (wEx.Response != null && wEx.Response is HttpWebResponse)
        {
            string username = null, password = null;
            bool userCanceled = false;
            HttpStatusCode statusCode = ((HttpWebResponse)wEx.Response).StatusCode;
            switch (statusCode)
            {
                case HttpStatusCode.ProxyAuthenticationRequired:
                    // This is just a convenience function defined elsewhere
                    GetAuthenticationCredentials(fileUrl, true,
                        out username, out password, out userCanceled);
                    if (!userCanceled)
                    {
                        client.Proxy.Credentials = new NetworkCredential(username, password);
                        goto tryAgain;
                    }
                    break;
                case HttpStatusCode.Unauthorized:
                    // This is just a convenience function defined elsewhere
                    GetAuthenticationCredentials(fileUrl, false,
                        out username, out password, out userCanceled);
                    if (!userCanceled)
                    {
                        client.Credentials = new NetworkCredential(username, password);
                        goto tryAgain;
                    }
                    break;
            }
        }
    }
}

推荐答案

Win32提供 Internet * 函数。

Win32 provides the Internet* functions.

http://msdn.microsoft.com/en-us/library/aa385473（VS .85）.aspx

你需要做一个（IIRC，我在10年内没有触及这些API） InternetOpenURL 和 InternetReadFile 。

You'll need to do an (IIRC, I haven't touched these APIs in over 10 years) InternetOpenURL and InternetReadFile.

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