Get location header from response, httpclient

Question

I have current code that is making POST request to REST API:

string url = "https://xxxx.azurewebsites.net/api/walk/";
string sContentType = "application/json";

JObject jsonObject = new JObject();
jsonObject.Add("Duration", walkInfo.Duration);
jsonObject.Add("WalkDate", walkInfo.WalkDate);


HttpClient oHttpClient = new HttpClient();
var oTaskPostAsync = oHttpClient.PostAsync(url, new StringContent(jsonObject.ToString(), Encoding.UTF8, sContentType));

And it works nice, what I have problems with is that I can't figure out how to get Location header from response of API. When I do test requires via postman I can see that location header is set Location →http://xxx/api/walk/5 so I need to get this Location value after PostAsync is executed.

halfer · Accepted Answer · 2018-12-29 22:02:52Z

4

As I have seen in the documentation you need to access to the result that is contained in your variable "oTaskPostAsync".

So for get the Location you should do something like this:

string url = "https://xxxx.azurewebsites.net/api/walk/";
string sContentType = "application/json";

JObject jsonObject = new JObject();
jsonObject.Add("Duration", walkInfo.Duration);
jsonObject.Add("WalkDate", walkInfo.WalkDate);


HttpClient oHttpClient = new HttpClient();
var oTaskPostAsync = oHttpClient.PostAsync(url, new StringContent(jsonObject.ToString(), Encoding.UTF8, sContentType));
var location = oTaskPostAsync.Headers.Location;

Location should return an Uri object.

Note: You have to be careful here, because you are doing an async call, you have to take into account that you probablly won't have the value until the server responds, so you maybe should use "await" for doing it sync.

edited Dec 29, 2018 at 22:02

halfer

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answered Jul 31, 2018 at 6:51

Brank Victoria

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1 Comment

Jimi Over a year ago

I would convert all the async/await part in Bold. Or the whole Note. Can also be written as var location = oTaskPostAsync.Headers.GetValues("Location").FirstOrDefault().

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