代码之家 › 专栏 › 技术社区 › xyz

在标题C中设置If匹配#

odata http-headers asp.net-web-api c#

xyz · 技术社区 · 8 年前

我有Odata服务,为了执行PUT,我们需要用 If-Match: * 在Post man中,我像下面这样给予,这很有效

如何在Odata服务调用中设置此If-Match以执行PUT操作。我试过下面的

 private async Task<HttpResponseMessage> PutJsonAsync(string messageBody,string B_Code)
 {
 string userName = ConfigurationManager.AppSettings["Username"];
 string password = ConfigurationManager.AppSettings["Password"];
 string BaseURL = ConfigurationManager.AppSettings["BaseURL"];

  try
 {
   using (var httpClient = new HttpClient())
  {
   var request = new StringContent(messageBody, Encoding.UTF8, "application/json");
   string apiUrl = "SAM('" + B_Code + "')";
   request.Headers.ContentType = new MediaTypeHeaderValue("application/json");
   request.Headers.TryAddWithoutValidation("If-Match", "*");
   var url = string.Format("{0}{1}", BaseURL, apiUrl);
   var creds = userName + ":" + password;
   var credentials = Encoding.ASCII.GetBytes(creds);
   httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(credentials));

   response = await httpClient.PutAsync(new Uri(url), request);
 }
}
catch (Exception ex)
{
 throw ex;
  }
   return response;
  }

但它不起作用,并引发错误 501:Not Implemented

OData版本:4.0 设置Cookie:JSESSIONID=XYZ;路径=/;保护仅限HTTPS 设置Cookie:XYZ;路径=/;安全;仅限HTTPS 服务器:Apache Coyote/1.1 更改:接受编码连接:保持活动内容类型:application/json;奥达塔。元数据=最小 }}系统。网Http。HttpResponseMessage`

1 回复 | 直到 6 年前

ProgrammingLlama Raveena Sarda 8 年前

您的“请求”对象是您的内容对象,而不是HttpRequestMessage对象。我是怎么意识到的?ContentType在HttpRequestMessage上不可用。

If-Match 不是一个内容级标题(我不知道为什么微软会这样区分)。您不能将其添加到此处,必须将其添加到请求标头。如果将其添加到内容对象,则会忽略它。

像这样的事情应该会奏效:

string apiUrl = "SAM('" + B_Code + "')";
var url = string.Format("{0}{1}", BaseURL, apiUrl);
var creds = userName + ":" + password;
var credentials = Encoding.ASCII.GetBytes(creds);
var request = new HttpRequestMessage(HttpMethod.Put, new Uri(url));
request.Content = new StringContent(messageBody, Encoding.UTF8, "application/json");
request.Headers.TryAddWithoutValidation("If-Match", "*");
request.Headers.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(credentials));

response = await httpClient.SendAsync(request);

推荐文章

SpaceCowboy74 Mohammad Aghazadeh · 使用Fluent Validation比较数组中的值

1 年前