.NET Framework 4.8.1与.NET Core 8中HttpClient调用API表现差异问题

调用某REST API时，.NET Framework 4.8.1和.NET Core 8下的HttpClient表现存在差异，其中.NET Core的结果符合预期，与Postman一致：

• Postman：API正常工作
• .NET Core 8下的HttpClient：API正常工作
• .NET Framework 4.8.1下的HttpClient：仅当显式设置HttpVersion为1.0时，API才正常工作

【Postman请求截图】

未显式设置HttpVersion的.NET Framework代码 #

Dim client = New HttpClient()
Dim request = New HttpRequestMessage(HttpMethod.Post, "https://api_endpint:port/b1s/v2/Login")
Dim content = New StringContent("{ ""CompanyDB"": ""XXXX"", ""UserName"": ""XXXX"", ""Password"": ""XXXX"" }", Nothing, "application/json")
request.Content = content
Dim ff = request.Content.ReadAsStringAsync().Result
Dim response = client.SendAsync(request).Result
response.EnsureSuccessStatusCode()

对应输出 #

StatusCode: 500, ReasonPhrase: 'Internal Server Error', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
    Connection: close
    Date: Wed, 13 Nov 2024 05:20:37 GMT
    Set-Cookie: ROUTEID=.node2; path=/;Secure;SameSite=None
    Server: Apache/2.4.51
    Server: (Unix)
    Content-Length: 0
}

设置HttpVersion为1.0的.NET Framework代码 #

Dim client = New HttpClient()
Dim request = New HttpRequestMessage(HttpMethod.Post, "https://api_endpint:port/b1s/v2/Login")
request.Version = HttpVersion.Version10
Dim content = New StringContent("{ ""CompanyDB"": ""XXXX"", ""UserName"": ""XXXX"", ""Password"": ""XXXX"" }", Nothing, "application/json")
request.Content = content
Dim ff = request.Content.ReadAsStringAsync().Result
Dim response = client.SendAsync(request).Result
response.EnsureSuccessStatusCode()

对应输出 #

StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
    Vary: Accept-Encoding
    Date: Wed, 13 Nov 2024 05:27:46 GMT
    Set-Cookie: B1SESSION=<token>;HttpOnly;;Secure;SameSite=None
    Set-Cookie: ROUTEID=.node2; path=/;Secure;SameSite=None
    Server: Apache/2.4.51
    Server: (Unix)
    Connection: close
    Content-Type: application/json; odata.metadata=minimal; charset=utf-8
}

.NET Core 8代码 #

Dim client = New HttpClient()
Dim request = New HttpRequestMessage(HttpMethod.Post, "https://api_endpint:port/b1s/v2/Login")
Dim content = New StringContent("{ ""CompanyDB"": ""XXXX"", ""UserName"": ""XXXX"", ""Password"": ""XXXX"" }", Nothing, "application/json")
request.Content = content
Dim ff = request.Content.ReadAsStringAsync().Result
Dim response = client.SendAsync(request).Result
response.EnsureSuccessStatusCode()

对应输出 #

StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
      Vary: Accept-Encoding
      Date: Wed, 13 Nov 2024 05:27:46 GMT
      Set-Cookie: B1SESSION=<token>;HttpOnly;;Secure;SameSite=None
      Set-Cookie: ROUTEID=.node2; path=/;Secure;SameSite=None
      Server: Apache/2.4.51
      Server: (Unix)
      Connection: close
      Content-Type: application/json; odata.metadata=minimal; charset=utf-8
}

内容的提问来源于stack exchange，提问作者raunakchoraria