Adding headers when using httpClient GetAsync

Question

I m implementing an API made by other colleagues with Apiary io  in a Windows Store app project   They show this example of a method I have to implement   var baseAddress   new Uri  https   private-a8014-xxxxxx apiary-mock com      using  var httpClient   new HttpClient  BaseAddress   baseAddress          using  var response   await httpClient GetAsync  user list  organizationId                   string responseData   await response Content ReadAsStringAsync              In this and some other methods  I need to have a header with a token that I get before   Here s an image of Postman  chrome extension  with the header I m talking about    How do I add that Authorization header to the request

User · Answer

Sometimes  you only need this code    httpClient DefaultRequestHeaders Add  token   token

User · Answer

Following the greenhoorn s answer  you can use  Extensions  like this     public static class HttpClientExtensions               public static HttpClient AddTokenToHeader this HttpClient cl  string token                          int timeoutSec   90                cl Timeout   new TimeSpan 0  0  timeoutSec               string contentType    application json               cl DefaultRequestHeaders Accept Add new MediaTypeWithQualityHeaderValue contentType                cl DefaultRequestHeaders Add  Authorization   String Format  Bearer  0    token                var userAgent    d-fens HttpClient               cl DefaultRequestHeaders Add  User-Agent   userAgent               return cl                    And use   string  tokenUpdated    TOKEN   HttpClient  client   client AddTokenToHeader  tokenUpdated  GetAsync   api values

User · Answer

A later answer  but because no one gave this solution     If you do not want to set the header on the HttpClient instance by adding it to the DefaultRequestHeaders  you could set headers per request   But you will be obliged to use the SendAsync   method   This is the right solution if you want to reuse the HttpClient -- which is a good practice for   performance and port exhaustion problems doing something thread-safe not sending the same headers every time   Use it like this   using  var requestMessage               new HttpRequestMessage HttpMethod Get   https   your site com          requestMessage Headers Authorization           new AuthenticationHeaderValue  Bearer   your token       httpClient SendAsync requestMessage

User · Answer

You can add whatever headers you need to the HttpClient    Here is a nice tutorial about it    This doesn t just reference to POST-requests  you can also use it for GET-requests

User · Answer

The accepted answer works but can got complicated when I wanted to try adding Accept headers  This is what I ended up with  It seems simpler to me so I think I ll stick with it in the future   client DefaultRequestHeaders Add  Accept    application   xml version 5 1    client DefaultRequestHeaders Add  Authorization    Basic     authstring

User · Answer

When using GetAsync with the HttpClient you can add the authorization headers like so   httpClient DefaultRequestHeaders Authorization                             new AuthenticationHeaderValue  Bearer    Your Oauth token      This does add the authorization header for the lifetime of the HttpClient so is useful if you are hitting one site where the authorization header doesn t change   Here is an detailed SO answer

[c#] Adding headers when using httpClient.GetAsync

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