今天研究了一天C#如何添加cookie到httpcient里面，從而發(fā)請(qǐng)求時(shí)，能把cookie作為頭部發(fā)出，最后發(fā)現(xiàn)根本加不進(jìn)去。 Httpclient的cookie是來(lái)自上一個(gè)請(qǐng)求的響應(yīng)，httpclient會(huì)自動(dòng)把上一個(gè)請(qǐng)求的響應(yīng)里面的cookie保存起來(lái)，所以當(dāng)發(fā)送幾個(gè)有關(guān)聯(lián)的request，就必須要用同一個(gè)Httpclient 示例： //第一個(gè)請(qǐng)求HttpClient client = new HttpClient();// 為JSON格式添加一個(gè)Accept報(bào)頭//client.DefaultRequestHeaders.Accept.Add(// new MediaTypeWithQualityHeaderValue("application/json"));string strDecodeBody = HttpUtility.UrlEncode(strBody);HttpContent content = new StringContent(strDecodeBody);content.Headers.ContentType = new MediaTypeHeaderValue("application/json");client.DefaultRequestHeaders.Add("user-agent", "Mozilla/5.0");client.DefaultRequestHeaders.Add("Authentication", "123");HttpResponseMessage response = null;response = client.PostAsync(strIP, content).Result;if (response != null){if (expectCode == HttpStatusCode.OK){var resultValue = response.Content.ReadAsStringAsync().Result;string strResponse = HttpUtility.UrlDecode(resultValue.ToString());string[] strCookies = (string[])response.Headers.GetValues("Set-Cookie");if(strCookies.Length>0){strCookie = strCookies[0].Substring(0, strCookies[0].IndexOf(';'));}}}//第二個(gè)請(qǐng)求，在這個(gè)請(qǐng)求里，沒(méi)有設(shè)置cookie，由于跟第一個(gè)請(qǐng)求使用相同httpclient，所以cookie會(huì)自動(dòng)放入請(qǐng)求頭部發(fā)給服務(wù)器string strEncodeBody = HttpUtility.UrlEncode(strBody);HttpContent content = new StringContent(strEncodeBody);content.Headers.ContentType = new MediaTypeHeaderValue("application/json");HttpResponseMessage response = null;response = client.PostAsync(strIP, content).Result;if (response != null){if (expectCode == HttpStatusCode.OK){var resultValue = response.Content.ReadAsStringAsync().Result;string strResponse = HttpUtility.UrlDecode(resultValue.ToString());return strResponse;}}頂

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轉(zhuǎn)載于:https://www.cnblogs.com/shiningrise/p/5931362.html

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