C# HttpClient发送Get和Post请求

 HttpClient发送Get和Post请求

 

public class HttpHelper
    {
        /// <summary>
        /// 发起POST同步请求
        /// 
        /// </summary>
        /// <param name="url"></param>
        /// <param name="postData"></param>
        /// <param name="contentType">application/xml、application/json、application/text、application/x-www-form-urlencoded</param>
        /// <param name="headers">填充消息头</param>        
        /// <returns></returns>
        public static string HttpPost(string url, string postData = null, string contentType = null, int timeOut = 30, Dictionary<string, string> headers = null)
        {
            postData = postData ?? "";
            using (HttpClient client = new HttpClient())
            {                
                client.Timeout = new TimeSpan(0, 0, timeOut);
                if (headers != null)
                {
                    foreach (var header in headers)
                        client.DefaultRequestHeaders.Add(header.Key, header.Value);
                }
                using (HttpContent httpContent = new StringContent(postData, Encoding.UTF8))
                {
                    if (contentType != null)
                        httpContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue(contentType);

                    HttpResponseMessage response = client.PostAsync(url, httpContent).Result;
                    return response.Content.ReadAsStringAsync().Result;
                }
            }
        }


        /// <summary>
        /// 发起POST异步请求
        /// </summary>
        /// <param name="url"></param>
        /// <param name="postData"></param>
        /// <param name="contentType">application/xml、application/json、application/text、application/x-www-form-urlencoded</param>
        /// <param name="headers">填充消息头</param>        
        /// <returns></returns>
        public static async Task<string> HttpPostAsync(string url, string postData = null, string contentType = null, int timeOut = 30, Dictionary<string, string> headers = null)
        {
            postData = postData ?? "";
            using (HttpClient client = new HttpClient())
            {
                client.Timeout = new TimeSpan(0, 0, timeOut);
                if (headers != null)
                {
                    foreach (var header in headers)
                        client.DefaultRequestHeaders.Add(header.Key, header.Value);
                }
                using (HttpContent httpContent = new StringContent(postData, Encoding.UTF8))
                {
                    if (contentType != null)
                        httpContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue(contentType);

                    HttpResponseMessage response = await client.PostAsync(url, httpContent);
                    return await response.Content.ReadAsStringAsync();
                }
            }
        }

        /// <summary>
        /// 发起GET同步请求
        /// </summary>
        /// <param name="url"></param>
        /// <param name="headers"></param>
        /// <param name="contentType"></param>
        /// <returns></returns>
        public static string HttpGet(string url, Dictionary<string, string> headers = null)
        {
            using (HttpClient client = new HttpClient())
            {
                if (headers != null)
                {
                    foreach (var header in headers)
                        client.DefaultRequestHeaders.Add(header.Key, header.Value);
                }
                else
                {
                    client.DefaultRequestHeaders.Add("ContentType", "application/x-www-form-urlencoded");
                    client.DefaultRequestHeaders.Add("UserAgent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");
                }
                try
                {
                    HttpResponseMessage response = client.GetAsync(url).Result;
                    return response.Content.ReadAsStringAsync().Result;
                }
                catch (Exception ex)
                {
                    //TODO 打印日志
                    Console.WriteLine($"[Http请求出错]{url}|{ex.Message}");
                }
                return "";
            }
        }

        /// <summary>
        /// 发起GET异步请求
        /// </summary>
        /// <param name="url"></param>
        /// <param name="headers"></param>
        /// <returns></returns>
        public static async Task<string> HttpGetAsync(string url, Dictionary<string, string> headers = null)
        {
            using (HttpClient client = new HttpClient())
            {
                if (headers != null)
                {
                    foreach (var header in headers)
                        client.DefaultRequestHeaders.Add(header.Key, header.Value);
                }
                HttpResponseMessage response = await client.GetAsync(url);
                return await response.Content.ReadAsStringAsync();
            }
        }

 

    /// <summary>
    /// httpclinet请求方式，请尽量使用IHttpClientFactory方式
    /// </summary>
    public class HttpHelper
    {
        public static async Task<string> GetAsync(string serviceAddress)
        {
            try
            {
                string result = string.Empty;
                Uri getUrl = new Uri(serviceAddress);
                using var httpClient = new HttpClient();
                httpClient.Timeout = new TimeSpan(0, 0, 60);
                result = await httpClient.GetAsync(serviceAddress).Result.Content.ReadAsStringAsync();
                return result;
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            return null;
        }

        public static async Task<string> PostAsync(string serviceAddress, string requestJson = null)
        {
            try
            {
                string result = string.Empty;
                Uri postUrl = new Uri(serviceAddress);

                using (HttpContent httpContent = new StringContent(requestJson))
                {
                    httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
                    using var httpClient = new HttpClient();
                    httpClient.Timeout = new TimeSpan(0, 0, 60);
                    result = await httpClient.PostAsync(serviceAddress, httpContent).Result.Content.ReadAsStringAsync();
                }
                return result;
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            return null;
        }
    }