ASP.NET实现RENREN SIG计算

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Security.Cryptography;

namespace ConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string, string> parameters = new Dictionary<string, string>();

            parameters.Add("access_token", "e.g accesstoken");

            parameters.Add("method", "xiaonei.blog.addBlog");

            parameters.Add("format", "json");

            parameters.Add("title", "abcdadf");

            parameters.Add("content", "contentsdfsd");

            parameters.Add("v", "1.0");

            string sig = GenerateSignature(parameters);

            parameters.Add("sig", sig);

            string post_string = GeneratePostParameter(parameters);

            Console.WriteLine("POST参数值:\n" + post_string + "\n");

            post_string = HttpWorker.HttpPost("http://api.renren.com/restserver.do", post_string);

            Console.WriteLine("POST返回结果:\n" + post_string);

            Console.ReadLine();
        }

        static string GenerateSignature(Dictionary<string, string> parameters)
        {
            IDictionary<string, string> sorted_paramters = new SortedDictionary<string, string>(parameters);

            IEnumerator<KeyValuePair<string, string>> dem = sorted_paramters.GetEnumerator();

            StringBuilder sbQuery = new StringBuilder();

            while (dem.MoveNext())
            {
                string name = dem.Current.Key;

                string value = dem.Current.Value;

                if (!string.IsNullOrEmpty(name) && !string.IsNullOrEmpty(value))
                {
                    sbQuery.Append(name);

                    sbQuery.Append("=");

                    sbQuery.Append(value);

                }
            }
            sbQuery.Append("your secret key");

            Console.WriteLine("拼接参数值:\n" + sbQuery.ToString() + "\n");

            return HashConfigString(sbQuery.ToString());
        }

        static string GeneratePostParameter(Dictionary<string ,string> parameters)
        {
            bool hasParameter = false;

            StringBuilder sbPostString = new StringBuilder();

            IDictionary<string, string> sorted_paramters = new SortedDictionary<string, string>(parameters);

            IEnumerator<KeyValuePair<string, string>> dem = parameters.GetEnumerator();

            while (dem.MoveNext())
            {
                string name = dem.Current.Key;

                string value = dem.Current.Value;

                if (!string.IsNullOrEmpty(name) && !string.IsNullOrEmpty(value))
                {
                    if (hasParameter)
                    {
                        sbPostString.Append("&");
                    }

                    sbPostString.Append(name);

                    sbPostString.Append("=");

                    sbPostString.Append(value);

                    hasParameter = true;
                }
            }

            return sbPostString.ToString();
        }

        static string HashConfigString(string plain_text)
        {
            MD5 md5Hash = MD5.Create();

            byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(plain_text));

            StringBuilder sbContent = new StringBuilder();

            foreach (byte element in data)
            {
                sbContent.Append(element.ToString("x2"));
            }

            Console.WriteLine("sig:\n" + sbContent.ToString() + "\n");

            return sbContent.ToString();
        }

    }

    public class HttpWorker
    {
        public static string HttpGet(string url)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

            StreamReader reader = new StreamReader(request.GetResponse().GetResponseStream());

            string http_result = reader.ReadToEnd(); if (reader != null) reader.Close();

            return http_result;
        }

        public static string HttpPost(string url, string data)
        {
            //System.Net.ServicePointManager.Expect100Continue = false;

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

            request.Method = "POST";

            request.KeepAlive = false;

            // request.ServicePoint.Expect100Continue = false;

            request.ContentType = "application/x-www-form-urlencoded;";

            byte[] post = Encoding.UTF8.GetBytes(data);

            using (Stream stream = request.GetRequestStream())
            {
                stream.Write(post, 0, post.Length);

                stream.Close();

                HttpWebResponse response = (HttpWebResponse)request.GetResponse();

                string http_result = string.Empty;

                StreamReader reader = new StreamReader(response.GetResponseStream());

                http_result = reader.ReadToEnd();

                if (reader != null) reader.Close();

                if (response != null) response.Close();

                return http_result;
            }
        }
    }
}