与POST编码问题C＃web请求 [英] C# web request with POST encoding question
问题描述
在MSDN网站有一些C＃代码显示如何使的例子与POST'ed数据的Web请求。下面是该代码的摘录：
On the MSDN site there is an example of some C# code that shows how to make a web request with POST'ed data. Here is an excerpt of that code:
WebRequest request = WebRequest.Create ("http://www.contoso.com/PostAccepter.aspx ");
request.Method = "POST";
string postData = "This is a test that posts this string to a Web server.";
byte[] byteArray = Encoding.UTF8.GetBytes (postData); // (*)
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = byteArray.Length;
Stream dataStream = request.GetRequestStream ();
dataStream.Write (byteArray, 0, byteArray.Length);
dataStream.Close ();
WebResponse response = request.GetResponse ();
...more...
线条为标志（ *）是困扰我就行了。不应该将数据使用以UrlEncode方法，而不是UTF8编码？这不就是应用程序/ x-WWW窗体-urlencoded 暗示？
The line marked (*) is the line that puzzles me. Shouldn't the data be encoded using the UrlEncode method rather than UTF8? Isn't that what application/x-www-form-urlencoded implies?
推荐答案
的示例代码是一种误导，因为的ContentType设置为应用程序/ x-WWW窗体-urlencoded，但实际内容是纯文本。应用程序/ x-WWW窗体-urlencoded是一个字符串这样的：
The sample code is misleading, because ContentType is set to application/x-www-form-urlencoded but the actual content is plain text. application/x-www-form-urlencoded is a string like this:
name1=value1&name2=value2
的
以UrlEncode函数用于逃避特殊字符，如'和;'和'='这样的分析器不考虑他们作为语法。它需要一个字符串（媒体类型text /纯），并返回一个字符串（媒体类型application / x-WWW窗体-urlencoded）。
The UrlEncode function is used to escape especial characters like '&' and '=' so a parser doesn't consider them as syntax. It takes a string (media type text/plain) and returns a string (media type application/x-www-form-urlencoded).
Encoding.UTF8.GetBytes是用来转换字符串（媒体类型application / x-WWW窗体-urlencoded在我们的例子）成字节数组，这是WebRequest的API所期待的。
Encoding.UTF8.GetBytes is used to convert the string (media type application/x-www-form-urlencoded in our case) into an array of bytes, which is what the WebRequest API expects.
这篇关于与POST编码问题C＃web请求的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
