View response body for HttpClient.PostAsync

Question

I a POST in Postman which generates the following Curl:

curl --location --request POST 'https://authqa.cqi.newry.me.com/as/token.oauth2' \ --header 'Authorization: Basic QVBJX0JURUNSRUZEQVRBOlAzNkNEAAE3RVdGUzRPT0NLQlQ0SERaS1pGRTZHTksyQkNJTFVJWT0=' \ --header 'Content-Type: application/x-www-form-urlencoded' \ --header 'Cookie: PF=mgvtuOC0jyPx3Lbrmw1hTX; BIGipServerauthqa-9031=1948242442.18211.0000' \ --data-urlencode 'grant_type=client_credentials' \ --data-urlencode 'charset=utf-8'

It returns the following body:

{ "access_token": "generated_token", "token_type": "Bearer", "expires_in": 1799 }

I'm trying to do the equivalent in C# using HttpClient.

This is the where the POST is done:

var body = new StringContent("grant_type=client_credentials", Encoding.UTF8, "application/x-www-form-urlencoded"); var httpResponseMessage = await _client.PostAsync("sa/token.oauth2", body);

I get the below with httpResponseMessage.ToString().

StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content: System.Net.Http.HttpConnectionResponseContent, Headers: { Date: Sun, 17 Jan 2021 21:19:39 GMT X-Frame-Options: SAMEORIGIN Strict-Transport-Security: max-age=31536000 Content-Security-Policy: frame-ancestors *.cmegroup.com *.chicago.cme.com X-XSS-Protection: 1;mode=block Cache-Control: no-store, no-cache Pragma: no-cache Set-Cookie: PF=4sugakrnEHwY5zWIXYasGo;Path=/;Secure;HttpOnly;SameSite=None Set-Cookie: BIGipServerauthqa-9031=1897910794.18211.0000; path=/; Httponly; Secure Transfer-Encoding: chunked Expires: Thu, 01 Jan 1970 00:00:00 GMT Content-Type: application/json; charset=utf-8 }

I can't see the response body posted above but I suspect it's the Content: System.Net.Http.HttpConnectionResponseContent. Don't know how to view it though. Can anybody tell me how I view the body as described above?

Does this answer your question? How to read HttpResponseMessage content as text — Peter Csala
– Peter Csala, Commented Jan 18, 2021 at 7:51

runnerpaul · Accepted Answer · 2021-01-18 08:09:09Z

HttpClientResponse contains content and you can read like this:

var body = new StringContent("grant_type=client_credentials", Encoding.UTF8, "application/x-www-form-urlencoded"); var httpResponseMessage = await _client.PostAsync("sa/token.oauth2", body); var responseContent = await httpResponseMessage.Content.ReadAsStringAsync(); // here you can read content as string ...

Also check here for more info.

runnerpaul · Accepted Answer · 2021-01-18 08:08:41Z

httpResponseMessage.Content.ReadAsStringAsync().Result will output what I want but it is blocking.

var response = await client.PostAsync("sa/token.oauth2", body); var content = await response.Content.ReadAsStringAsync();

Note that you usually should be using await - not .Result.

See How to read HttpResponseMessage content as text

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