public async Task<ResponseObject> SendDatabaseRequest (RequestObject request) {
var returnObj = new ResponseObject();
using (var client = new HttpClient ()) {
client.BaseAddress = new Uri(this.url);
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue(@"application/json"));
string relativePath;
switch (request.RequestType) {
case RequestType.GetAuthenticationRequest:
{
relativePath = GetAuthRequestURI (request);
break;
}
case RequestType.GetAuthenticationUsernameRequest:
{
relativePath = GetAuthUserURI (request);
break;
}
case RequestType.GetFieldRequest:
{
relativePath = GetFieldRequestURI (request);
break;
}
case RequestType.PostFieldRequest:
{
relativePath = PostFieldRequestURI (request);
break;
}
case RequestType.PostCreateUser:
{
relativePath = PostCreatePrintURI (request);
break;
}
case RequestType.DeleteFieldRequest:
{
relativePath = DeleteFieldURI (request);
break;
}
default:
{
throw new NotImplementedException ();
}
}
StringContent requestContent = new StringContent(JsonConvert.SerializeObject(request));
using (var response = await client.PostAsync (relativePath, requestContent)) {
if (response.IsSuccessStatusCode) {
// We've received a successful response. Sweet :)
var body = await response.Content.ReadAsStringAsync ();
returnObj = JsonConvert.DeserializeObject<ResponseObject> (body);
} else {
// We've encountered an error.
Console.WriteLine ("Error Parsing JSON");
}
}
}
return returnObj;
}
//Disable the "async" warning until we actually implement the async parts.
#pragma warning disable 1998
private static async void HandleRequest (IAsyncResult result)
{
// Note for all of this:
// We're good as long as async operators work fine across platforms.
// We will enter into callback hell if they don't.
HttpListener listener = (HttpListener)result.AsyncState;
HttpListenerContext context = listener.EndGetContext (result);
var httpRequest = context.Request;
RequestObject requestObject = new RequestObject ();
requestObject.RequestType = RequestType.InvalidRequest;
ResponseObject databaseResponse = new ResponseObject ();
try {
requestObject = ParseRequest (httpRequest);
if (requestObject.RequestType == RequestType.InvalidRequest) {
// Handle us receiving a malformed request.
throw new Exception("The request could not be properly parsed");
}
// Console.WriteLine (requestObject.RequestType);
// =================================================================
// Open a connection to the peripheral so that we can receive
// a finger print from the user.
// =================================================================
if (requestObject.RequestType == RequestType.GetAuthenticationRequest) {
// Console.WriteLine ("Please enter your fingerprint:");
// var user = Console.ReadLine ();
// var temp = new List<string>() {"Batman", "Superman", "Flash", "Wonderwoman", "Green Lantern", "Spiderman", "Green Arrow"};
// string user;
// lock (o) {
// user = temp [r.Next (temp.Count)];
// }
//
// // Randomly authenticate one of our users.
// requestObject.Fields.Add ("fingerprint", user);
PeripheralConnection peripheral = PeripheralConnection.Instance;
// This either opens a new connection or simply verifies the existing
// connection is good.
await m.WaitAsync();
await peripheral.TryOpenConnection ();
m.Release();
await peripheral.RequestTemplate(requestObject);
}
RemoteConnectionManager databaseManager = new RemoteConnectionManager (connectionString);
databaseResponse = await databaseManager.SendDatabaseRequest (requestObject);
}
catch (Exception ex) {
Console.WriteLine (ex.Message);
}
finally {
var responseText = GenerateResponse (requestObject, databaseResponse);
var responseBytes = System.Text.Encoding.UTF8.GetBytes (responseText);
// Pretty simple, get a handle to the response packet and the output stream.
var httpResponse = context.Response;
httpResponse.ContentLength64 = responseBytes.Length;
var outputStream = httpResponse.OutputStream;
// Write the response to the buffer and then close the connection. Note that
// These might take a while to do.
outputStream.Write (responseBytes, 0, responseBytes.Length);
outputStream.Close ();
}
}
private static string GenerateResponse (RequestObject request, ResponseObject dbResponse) {
switch (request.RequestType) {
case RequestType.GetAuthenticationRequest:
{
List<string> output = new List<string> ();
output.Add (dbResponse.SessionID);
output.Add (dbResponse.ResponseCode.ToString ());
return JsonConvert.SerializeObject (output);
}
case RequestType.GetFieldRequest:
{
dbResponse.Responses.Add (dbResponse.ResponseCode.ToString ());
return JsonConvert.SerializeObject (dbResponse.Responses);
}
case RequestType.PostFieldRequest:
{
List<string> output = new List<string> ();
output.Add (dbResponse.ResponseCode.ToString ());
return JsonConvert.SerializeObject (output);
}
case RequestType.PostCreateUser:
{
break;
}
case RequestType.DeleteFieldRequest:
{
List<string> output = new List<string> ();
output.Add (dbResponse.ResponseCode.ToString ());
return JsonConvert.SerializeObject (output);
}
}
return String.Empty;
}
