public async Task RunWorkflow(int requestId)
{
var request = await _requestRepository.GetAsync(requestId);
var order = await _orderRepository.GetAsync(request.OrderId);
var workflow = JsonConvert.DeserializeObject <WorkflowJson>(request.WorkflowJson);
foreach (var step in workflow.Steps)
{
WorkflowRequestStep httprequest = null;
if (step.Type == "httprequest")
{
httprequest = ParseRequest(step.Request);
httprequest.Url = ReplaceVariableNames(httprequest.Url);
try
{
var result = await GetRequestResult(httprequest);
resultVariables.Add(httprequest.ResultVariable, JsonConvert.DeserializeObject <dynamic>(result));
}
catch (Exception e)
{
step.Error = e.Message;
break;
}
}
await UpdateRequest(request, workflow);
}
}
private async Task <string> GetRequestResult(WorkflowRequestStep request)
{
var http = new HttpClient();
foreach (var header in request.Headers)
{
http.DefaultRequestHeaders.Add(header.Name, header.Value);
}
var list = new List <string>();
foreach (var param in request.Params)
{
list.Add($"{param.Name}={param.Value}");
}
var queryParameterString = "?" + string.Join('&', list);
queryParameterString = queryParameterString != "?" ? queryParameterString : "";
StringContent content = null;
if (request.Body.IsNullOrWhiteSpace())
{
var body = JsonConvert.DeserializeObject(request.Body);
content = new StringContent(JsonConvert.SerializeObject(body), Encoding.Default, "application/json");
}
HttpResponseMessage result = null;
switch (request.Method)
{
case "POST":
result = await http.PostAsync(request.Url + queryParameterString, content);
break;
case "GET":
result = await http.GetAsync(request.Url + queryParameterString);
break;
case "PUT":
result = await http.PutAsync(request.Url + queryParameterString, content);
break;
case "DELETE":
result = await http.DeleteAsync(request.Url + queryParameterString);
break;
default:
break;
}
if (!result.IsSuccessStatusCode)
{
throw new Exception("Error: " + result.ReasonPhrase + ". Status Code: " + result.StatusCode);
}
return(await result.Content.ReadAsStringAsync());
}
