以下http post请求使用multipart / form-data内容类型发送数据.
-----------------------------27311326571405\r\nContent-Disposition: form-data; name="list"\r\n\r\n8274184\r\n-----------------------------27311326571405\r\nContent-Disposition: form-data; name="list"\r\n\r\n8274174\r\n-----------------------------27311326571405\r\nContent-Disposition: form-data; name="list"\r\n\r\n8274178\r\n-----------------------------27311326571405\r\nContent-Disposition: form-data; name="antirobot"\r\n\r\n2341234\r\n-----------------------------27311326571405\r\nContent-Disposition: form-data; name="votehidden"\r\n\r\n1\r\n-----------------------------27311326571405--\r\n
列表是输入名称. 8274184,8274174,8274178等是输入值.但是什么是27311326571405,27311326571405 ……等等？我想用c#发送相同的请求,但我真的不知道在哪里可以得到这个数字.
解决方法
— 27311326571405被称为边界,它是一个随机字符串,不应出现在您要发送的数据中,并用作值之间的分隔符.
以下是将此类请求发送到给定地址的示例：
class Program
{
static void Main()
{
var data = new List<KeyValuePair<string,string>>(new[]
{
new KeyValuePair<string,string>("list","8274184"),new KeyValuePair<string,"8274174"),"8274178"),string>("antirobot","2341234"),string>("votehidden","1"),});
string boundary = "----MyAppBoundary" + DateTime.Now.Ticks.ToString("x");
var request = (HttpWebRequest)WebRequest.Create("http://example.com");
request.ContentType = "multipart/form-data; boundary=" + boundary;
request.Method = "POST";
using (var requestStream = request.GetRequestStream())
using (var writer = new StreamWriter(requestStream))
{
foreach (var item in data)
{
writer.WriteLine("--" + boundary);
writer.WriteLine(string.Format("Content-Disposition: form-data; name=\"{0}\"",item.Key));
writer.WriteLine();
writer.WriteLine(item.Value);
}
writer.WriteLine(boundary + "--");
}
using (var response = request.GetResponse())
using (var responseStream = response.GetResponseStream())
using (var reader = new StreamReader(responseStream))
{
Console.WriteLine(reader.ReadToEnd());
}
}
}
