c# – 发送multipart / form-data内容类型请求

发布时间：2020-12-15 18:06:02 所属栏目：百科来源：网络整理

导读：以下http post请求使用multipart / form-data内容类型发送数据. -----------------------------27311326571405rnContent-Disposition: form-data; name="list"rnrn8274184rn-----------------------------27311326571405rnContent-Disposition: fo

以下http post请求使用multipart / form-data内容类型发送数据.

-----------------------------27311326571405rnContent-Disposition: form-data; name="list"rnrn8274184rn-----------------------------27311326571405rnContent-Disposition: form-data; name="list"rnrn8274174rn-----------------------------27311326571405rnContent-Disposition: form-data; name="list"rnrn8274178rn-----------------------------27311326571405rnContent-Disposition: form-data; name="antirobot"rnrn2341234rn-----------------------------27311326571405rnContent-Disposition: form-data; name="votehidden"rnrn1rn-----------------------------27311326571405--rn

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());
        }
    }
}

（编辑：李大同）

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