get，post请求(异步，同步)

最新推荐文章于 2024-09-24 13:37:14 发布

原创最新推荐文章于 2024-09-24 13:37:14 发布 · 796 阅读

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#get请求 #post请求 #同步异步

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本文深入探讨了HTTP中常见的GET和POST请求，重点解析它们在同步与异步场景下的应用。了解何时使用GET获取资源，何时利用POST提交数据，以及这两种请求在异步操作中的差异，对于提升Web开发效率至关重要。

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  /// <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())
            {
                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, string contentType = null, Dictionary<string, string> headers = null)
        {
            using (HttpClient client = new HttpClient())
            {
                if (contentType != null)
                    client.DefaultRequestHeaders.Add("ContentType", contentType);
                if (headers != null)
                {
                    foreach (var header in headers)
                        client.DefaultRequestHeaders.Add(header.Key, header.Value);
                }
                HttpResponseMessage response = client.GetAsync(url).Result;
                return response.Content.ReadAsStringAsync().Result;
            }
        }

        /// <summary>
        /// 发起GET异步请求
        /// </summary>
        /// <param name="url"></param>
        /// <param name="headers"></param>
        /// <param name="contentType"></param>
        /// <returns></returns>
        public static async Task<string> HttpGetAsync(string url, string contentType = null, Dictionary<string, string> headers = null)
        {
            using (HttpClient client = new HttpClient())
            {
                if (contentType != null)
                    client.DefaultRequestHeaders.Add("ContentType", contentType);
                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>
        /// 发起GET异步请求
        /// </summary>
        /// <param name="url"></param>
        /// <param name="headers"></param>
        /// <param name="contentType"></param>
        /// <returns></returns>
        public static async Task<Stream> HttpGetStreamAsync(string url, string contentType = null, Dictionary<string, string> headers = null)
        {
            using (HttpClient client = new HttpClient())
            {
                if (contentType != null)
                    client.DefaultRequestHeaders.Add("ContentType", contentType);
                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.ReadAsStreamAsync();
            }
        }