How to get content body from a httpclient call?
I've been trying to figure out how to read the contents of a httpclient call, and I can't seem to get it. The response status I get is 200, but I can't figure out how to get to the actual Json being returned, which is all I need!
The following is my code:
async Task<string> GetResponseString(string text)
{
var httpClient = new HttpClient();
var parameters = new Dictionary<string, string>();
parameters["text"] = text;
Task<HttpResponseMessage> response =
httpClient.PostAsync(BaseUri, new FormUrlEncodedContent(parameters));
return await response.Result.Content.ReadAsStringAsync();
}
And I am getting it just calling it from a method:
Task<string> result = GetResponseString(text);
And This is what I get
response Id = 89, Status = RanToCompletion, Method = "{null}", Result = "StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:\r\n{\r\n Connection: keep-alive\r\n Date: Mon, 27 Oct 2014 21:56:43 GMT\r\n ETag: \"5a266b16b9dccea99d3e76bf8c1253e0\"\r\n Server: nginx/0.7.65\r\n Content-Length: 125\r\n Content-Type: application/json\r\n}" System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage>
Update: This is my current code per Nathan's response below
async Task<string> GetResponseString(string text)
{
var httpClient = new HttpClient();
var parameters = new Dictionary<string, string>();
parameters["text"] = text;
var response = await httpClient.PostAsync(BaseUri, new FormUrlEncodedContent(parameters));
var contents = await response.Content.ReadAsStringAsync();
return contents;
}
And I call it from this method....
string AnalyzeSingle(string text)
{
try
{
Task<string> result = GetResponseString(text);
var model = JsonConvert.DeserializeObject<SentimentJsonModel>(result.Result);
if (Convert.ToInt16(model.pos) == 1)
{
_numRetries = 0;
return "positive";
}
if (Convert.ToInt16(model.neg) == 1)
{
_numRetries = 0;
return "negative";
}
if (Convert.ToInt16(model.mid) == 1)
{
_numRetries = 0;
return "neutral";
}
return "";
}
catch (Exception e)
{
if (_numRetries > 3)
{
LogThis(string.Format("Exception caught [{0}] .... skipping", e.Message));
_numRetries = 0;
return "";
}
_numRetries++;
return AnalyzeSingle(text);
}
}
And it keeps running forever, It hits the line
var model = JsonConvert.DeserializeObject<SentimentJsonModel>(result.Result);
Once, and it continues to go without stopping at another breakpoint.
When I pause execution, It say
Id = Cannot evaluate expression because the code of the current method is optimized., Status = Cannot evaluate expression because the code of the current method is optimized., Method = Cannot evaluate expression because the code of the current method is optimized., Result = Cannot evaluate expression because the code of the current method is optimized.
.. I Continue execution, but it just runs forever. Not sure what the problem is
Solution 1:
The way you are using await/async is poor at best, and it makes it hard to follow. You are mixing await
with Task'1.Result
, which is just confusing. However, it looks like you are looking at a final task result, rather than the contents.
I've rewritten your function and function call, which should fix your issue:
async Task<string> GetResponseString(string text)
{
var httpClient = new HttpClient();
var parameters = new Dictionary<string, string>();
parameters["text"] = text;
var response = await httpClient.PostAsync(BaseUri, new FormUrlEncodedContent(parameters));
var contents = await response.Content.ReadAsStringAsync();
return contents;
}
And your final function call:
Task<string> result = GetResponseString(text);
var finalResult = result.Result;
Or even better:
var finalResult = await GetResponseString(text);
Solution 2:
If you are not wanting to use async
you can add .Result
to force the code to execute synchronously:
private string GetResponseString(string text)
{
var httpClient = new HttpClient();
var parameters = new Dictionary<string, string>();
parameters["text"] = text;
var response = httpClient.PostAsync(BaseUri, new FormUrlEncodedContent(parameters)).Result;
var contents = response.Content.ReadAsStringAsync().Result;
return contents;
}