"The remote server returned an error: (417) Expectation Failed."
Well, you posted the question here, and Can Bilgin gave an answer. I post it here for those who have the problem than you.
I think it should be possible to add the header manually... I would give it a go with the operationscope... from an earlier example:
Task<GetADGroupMemberResponse> AccountManagement.GetADGroupMemberAsync(GetADGroupMemberRequest request)
{
// CB: Creating the OperationContext
using (var scope = new OperationContextScope(this.InnerChannel))
{
// CB: Creating and Adding the request header
var header = MessageHeader.CreateHeader("Server", "http://schemas.microsoft.com/2008/1/ActiveDirectory/CustomActions", request.Server);
OperationContext.Current.OutgoingMessageHeaders.Add(header);
return base.Channel.GetADGroupMemberAsync(request);
}
}
cause on the http requests with the httpclient you can do something like (again from an earlier example):
var httpClient = new HttpClient();
var httpContent = new HttpRequestMessage(HttpMethod.Post, "http://app.proceso.com.mx/win8/login");
// NOTE: Your server was returning 417 Expectation failed,
// this is set so the request client doesn't expect 100 and continue.
httpContent.Headers.ExpectContinue = false;
var values = new List<KeyValuePair<string, string>>();
values.Add(new KeyValuePair<string, string>("user", "******"));
values.Add(new KeyValuePair<string, string>("pass", "******"));
httpContent.Content = new FormUrlEncodedContent(values);
HttpResponseMessage response = await httpClient.SendAsync(httpContent);
// here is the hash as string
var result = await response.Content.ReadAsStringAsync();
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Ateş Danış
Updated on June 11, 2022Comments
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Ateş Danış about 2 years
i'm writing windows 8 app.(on Visiual Studio 2012) which uses my wcf service. It works well when i try at my home, so it can connect to the wcf. But when i tried at my office, it cannot connect to wcf and returns error :
The remote server returned an error: (417) Expectation Failed.
I think its causing by firewall in the office network.. Googled too much, tried a lot of however the problem still here.
System.Net.ServicePointManager.Expect100Continue = false;
Doesn't work because .Net Framework 4.5 has not ServicePointManager Class but msdn says there is ServicePointManager on .Net 4.5.. http://msdn.microsoft.com/en-us/library/system.net.servicepointmanager.expect100continue.aspx
<system.net> <settings> <servicePointManager expect100Continue="false" /> </settings> </system.net>
Cannot try this to write on web.config or app.config because win8 app has not these files..
some people wrote above code to devenv.exe.config file of VS 2012. I tried it but nothing changed.
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lockstock over 11 yearsI have seen this error before when my web services calls were beging blocked by a proxy
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