[英]Using C# HttpClient, how to POST a string HttpContent to ASP.net Core web API?
[英]C# - httpclient - json body - Not getting applied appropriately using httpcontent
以下是我將返回響應狀態代碼和響應 output 元組的代碼。
private Tuple<int, string> API_Check(string URL, string reqtype, string reqbody, string split_username, string split_pwd)
{
string responsetxt="";
HttpResponseMessage httpresult = new HttpResponseMessage();
int statuscode = 0;
ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;
HttpClient _httpClient = new HttpClient();
var authString = Convert.ToBase64String(Encoding.UTF8.GetBytes(split_username+":" + split_pwd));
_httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", authString);
try
{
using (var content = new StringContent(JsonConvert.SerializeObject(reqbody)))
{
if (reqtype == "GET")
{
httpresult = _httpClient.GetAsync(URL).Result;
}
if (reqtype == "PUT")
{
httpresult = _httpClient.PutAsync(URL, content).Result;
//httpresult = _httpClient.PutAsync()
}
if (reqtype == "POST")
{
httpresult = _httpClient.PostAsync(URL, content).Result;
}
statuscode = (int)httpresult.StatusCode;
responsetxt = httpresult.Content.ReadAsStringAsync().Result;
return Tuple.Create(statuscode, responsetxt);
}
}
catch (System.Net.WebException Excptn)
{
statuscode = 401;
responsetxt = Excptn.Status.ToString();
using (var stream = Excptn.Response.GetResponseStream())
using (var reader = new StreamReader(stream))
{
MessageBox.Show(reader.ReadToEnd());
}
}
return Tuple.Create(statuscode, responsetxt);
}
由於某種原因,請求正文在調用期間未正確填寫。 對於此 Post 調用,我收到 401 Unauthorized ,這絕對不是授權錯誤,因為我收到的響應消息相當於空正文或無效輸入 json 格式。
當我嘗試使用 Postman 為端點命中相同的 reqbody 時,我得到 200 個有效響應。 此外,GetAsync 適用於不需要主體的類似 API。
我確認用戶名、密碼或端點 URL 沒有問題。
有沒有辦法,我可以避免使用 httpcontent 並使用字符串來通過 C# 擊中 API?
現在,由於我當前的 .Net 框架限制,我無法使用 HttpWebRequest。
你的代碼有很多問題:
reqbody
。 聽起來你已經有一個 JSON 字符串,在這種情況下你不需要序列化它。.Result
,它會導致死鎖。 改用await
。Tuple
,這可能是低效的。ServicePointManager.SecurityProtocol =...
,而是讓操作系統選擇最佳的安全協議。ServicePointManager
,因為它會影響來自您的應用程序的所有 HTTP 請求。 而是設置相關的HtppClient
屬性,或者更好:使用HttpRequestMessage
並直接在消息上設置它。HttpRequestMessage
,您可以稍微簡化代碼,給它 HTTP 方法的類型HttpRequestException
,從中可以獲取實際的StatusCode
。HttpClient
不會拋出不成功的代碼。 您需要明確處理它們。HttpClient
,否則可能會導致套接字耗盡。new HttpResponseMessage
並沒有多大意義。HttpClient _httpClient = new HttpClient {
DefaultRequestHeaders = {
ExpectContinue = false,
},
};
private async Task<(int, string)> API_Check(string URL, HttpMethod reqtype, string reqbody, string split_username, string split_pwd)
{
var authString = Convert.ToBase64String(Encoding.UTF8.GetBytes(split_username + ":" + split_pwd));
try
{
using (var content = new StringContent(reqbody))
using (var request = new HttpRequestMessage(URL, reqtype))
{
message.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", authString);
if (reqtype != "GET")
message.Content = content;
using var httpresult = await _httpClient.SendAsync(URL, content);
var statuscode = (int)httpresult.StatusCode;
var responsetxt = await httpresult.Content.ReadAsStringAsync();
if (!httpresult.IsSuccessStatusCode)
MessageBox.Show(responsetxt);
return (statuscode, responsetxt);
}
}
catch (HttpRequestException ex)
{
var statuscode = ex.StatusCode ?? 0;
var responsetxt = ex.Message;
MessageBox.Show(responsetxt);
return (statuscode, responsetxt);
}
}
如果您實際上有一個 object 來序列化然后將方法更改為
private async Task<(int, string)> API_Check(string URL, HttpMethod reqtype, object reqbody, string split_username, string split_pwd)
{
....
....
using (var content = new StringContent(JsonConvert.SerializeObject(reqbody)))
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