考虑重定向的ASP.NET Web API服务
public class ThisController : ApiController
{
/* more methods */
public override HttpResponseMessage Post()
{
var result = new HttpResponseMessage(HttpStatusCode.MovedPermanently);
// Post requests should be made to "ThatController" instead.
string uri = Url.Route("That", null);
result.Headers.Location = new Uri(uri, UriKind.Relative);
return result;
}
}
试图验证POST数据到"api/this"会将你重定向到"api/that",我有以下测试方法:
[TestMethod]
public void PostRedirects()
{
using (var client = CreateHttpClient("application/json"))
{
var content = CreateContent(expected, "application/json");
using (var responseMessage = client.PostAsync("api/this", content).Result)
{
Assert.AreEqual(HttpStatusCode.MovedPermanently, responseMessage.StatusCode);
Assert.AreEqual(new Uri("https://api.example.com/api/that"), responseMessage.Headers.Location);
}
}
}
protected HttpClient …我在.Net 4.5.2框架中使用HttpClient类.我正在对第三方Web服务进行PostAsync.这篇文章80%的时间都在工作,20%的时间我们的回复被缩短了.在这种情况下,我们得到以下异常:
System.Net.Http.HttpRequestException:将内容复制到流时出错.---> System.IO.IOException:无法从传输连接读取数据:远程主机强制关闭现有连接.---> System.Net.Sockets.SocketException:远程主机在System.Net.Sockets.NetworkStream.BeginRead(Byte []缓冲区,Int32偏移量,Int32大小,AsyncCallback回调,对象状态)强制关闭现有连接---内部异常堆栈跟踪的结束---在System.Net.FixedSizeReader.StartReading()的System.Net.Sockets.NetworkStream.BeginRead(Byte []缓冲区,Int32偏移量,Int32大小,AsyncCallback回调,对象状态)在System.Net.Security._SslStream.StartFrameHeader(字节[]缓冲液,的Int32偏移的Int32计数,AsyncProtocolRequest asyncRequest)在System.Net.Security._SslStream.StartReading(字节[]缓冲液,的Int32偏移的Int32计数,
随后的相同请求成功.这不是我们可以重新设置的请求,因为已经放置了业务.所以它让我们处于一种尴尬的境地.
这是我的代码:
using (var httpClient = new HttpClient())
{
httpClient.DefaultRequestHeaders.Authorization = authorizationHeader;
HttpContent httpContent = new StringContent(someXml);
//Exception occurs on next line...
var response = await httpClient.PostAsync("https://thirdpartyendpoint", httpContent);
var responseXml = await response.Content.ReadAsStringAsync();
//convert to Dto
}
第三方服务成功地将记录保存到他们的数据库中,并且在他们的结尾没有看到任何明显的例外.他们确实注意到,写入数据库的失败请求通常需要比成功请求更长的时间(大约18-30秒).
谢谢您的帮助
我正在尝试实现此代码示例,但得到HttpRequestException- " 将内容复制到流时出错 ".ReadAsStringAsync()调用方法时 内部异常是" 无法访问已处置的对象".我正在使用Fiddler来提出请求.我不明白.有人可以解释为什么我得到这个例外并提供解决方案吗？
Web Api方法:
public async Task<HttpResponseMessage> Post(HttpRequestMessage request)
{
try
{
var jsonString = await request.Content.ReadAsStringAsync();
}
catch (Exception ex)
{
throw;
}
return new HttpResponseMessage(HttpStatusCode.Created);
}
提琴手(POST):
User-Agent: Fiddler
Host: localhost:23567
Content-Length: 18
Content-Type: application/json; charset=utf-8
Body{"Test":1}
编辑:
我有一个线索,但需要验证.在Web Api控制器上,我有一个ActionFilterAttribute并且在它的OnActionExecuting覆盖中,有这一行:
public override async void OnActionExecuting(HttpActionContext actionContext)
{
// omitted code
actionContext.Request.Content.ReadAsStreamAsync();
}
可能是因为内容在这里被读取,它再也无法使用？如果是这样,我怎么能在方法中使它？此处的内容是否与HttpRequestMessage相同？ 这可能包含答案.
我正在使用FlurlHttp，并且想对某些API调用禁用AllowAutoRedirect。我知道如何使System.Net.Http.HttpClient不遵循302重定向？
WebRequestHandler webRequestHandler = new WebRequestHandler();
webRequestHandler.AllowAutoRedirect = false;
HttpClient httpClient = new HttpClient(webRequestHandler);
// Send a request using GetAsync or PostAsync
Task<HttpResponseMessage> response = httpClient.GetAsync("http://www.google.com")
但是对于Flurl，我只找到了与C＃Flurl中所述类似的方法 -将WebRequestHandler添加到FlurlClient（我尚未编译下面的代码，因此可能会有一些错误）
public class HttpClientFactoryWithWebRequestHandler : DefaultHttpClientFactory
{
private readonly WebRequestHandler _webRequestHandler;
public HttpClientFactoryWithWebRequestHandler (WebRequestHandler webRequestHandler )
{
_webRequestHandler = webRequestHandler ;
}
public override HttpMessageHandler CreateMessageHandler()
{
var handler =_webRequestHandler ;
//Or var handler = new WebRequestHandler(_webRequestHandler );
return handler;
}
}
然后，我可以为新的FlurlClient传递设置：
WebRequestHandler webRequestHandler = new …