类型为“application/x-www-form-urlencoded"的 C# HttpWebRequest；- 如何发送“&"内容正文中的字符?

问题描述

我正在用 C# 编写一个连接 API 的小型应用程序.

I'm writing a small API-connected application in C#.

我连接到一个 API，该 API 的方法接受一个长字符串，即日历(ics)文件的内容.

I connect to a API which has a method that takes a long string, the contents of a calendar(ics) file.

我是这样做的:

HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL);
request.Method = "POST";
request.AllowAutoRedirect = false;
request.CookieContainer = my_cookie_container;
request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
request.ContentType = "application/x-www-form-urlencoded";

string iCalStr = GetCalendarAsString();

string strNew = "&uploadfile=true&file=" + iCalStr;

using (StreamWriter stOut = new StreamWriter(request.GetRequestStream(), System.Text.Encoding.ASCII))
 {
     stOut.Write(strNew);
     stOut.Close();
 }

这似乎很好用，直到我在日历中添加了一些特定的 HTML.

This seems to work great, until I add some specific HTML in my calendar.

如果我的日历(或类似)中有&nbsp"，则服务器只会获取&"点之前的所有数据，因此我假设&"让它看起来像这个点之后的任何东西都属于一个新的参数?

If I have a '&nbsp' somewhere in my calendar (or similar) the server only gets all the data up to the '&'-point, so I'm assuming the '&' makes it look like anything after this point belongs to a new parameter?

我该如何解决这个问题?

How can I fix this?

推荐答案

由于你的内容类型是 application/x-www-form-urlencoded 你需要对 POST 正文进行编码，尤其是如果它包含像 & 这样的字符，它们在表单中具有特殊含义.

Since your content-type is application/x-www-form-urlencoded you'll need to encode the POST body, especially if it contains characters like & which have special meaning in a form.

在编写之前尝试通过 HttpUtility.UrlEncode 传递您的字符串到请求流.

Try passing your string through HttpUtility.UrlEncode before writing it to the request stream.

这里有几个链接供参考.

Here are a couple links for reference.

• http://en.wikipedia.org/wiki/Percent-encoding

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