private async void sendRequest(ManticoreEngine engine, int timeout, HttpClient client, HttpRequestMessage request, JsValue callback)
{
var responseInfo = engine.CreateJsObject();
HttpResponseMessage response = null;
CancellationTokenSource cts = new CancellationTokenSource(timeout);
try
{
response = await client.SendRequestAsync(request, HttpCompletionOption.ResponseContentRead).AsTask(cts.Token);
}
catch (Exception x)
{
var ei = new JsErrorBuilder(engine, x).Build();
responseInfo.FastAddProperty("error", ei, false, true, false);
}
if (response != null && response.Headers.Count > 0)
{
var headerCollection = engine.CreateJsObject();
foreach (var kv in response.Headers)
{
try
{
headerCollection.FastAddProperty(kv.Key, new JsValue(kv.Value), false, true, false);
}
catch (ArgumentException)
{
// Swallow duplicate headers for now.
}
}
responseInfo.FastAddProperty("headers", headerCollection, false, true, false);
}
byte[] binaryResult = null;
if (response != null)
{
responseInfo.FastAddProperty("status", new JsValue((int)response.StatusCode), false, true, false);
// TODO find a way to sneak this wait into the gap between returning and asking for the results
// json/body/text signatures probably need to change to take a callback.
binaryResult = (await response.Content.ReadAsBufferAsync()).ToArray();
}
engine.Js(() =>
{
responseInfo.FastAddProperty("json", engine.AsJsFunction((thisObject, args) => {
return(engine.jsEngine.Json.Parse(JsValue.Null,
new JsValue[] { Encoding.UTF8.GetString(binaryResult, 0, binaryResult.Length) }));
}), false, false, false);
responseInfo.FastAddProperty("body", engine.AsJsFunction((thisObject, args) => {
return(engine.jsEngine.Json.Parse(JsValue.Null, new JsValue[] { Convert.ToBase64String(binaryResult) }));
}), false, false, false);
responseInfo.FastAddProperty("text", engine.AsJsFunction((thisObject, args) => {
return(new JsValue(Encoding.UTF8.GetString(binaryResult, 0, binaryResult.Length)));
}), false, false, false);
callback.As <FunctionInstance>().Call(engine.ManticoreJsObject, new JsValue[] { JsValue.Null, responseInfo });
});
}
private async void SetTimeout(ManticoreEngine engine, FunctionInstance callback, int timeout)
{
await Task.Delay(TimeSpan.FromMilliseconds(timeout));
engine.Js(() =>
{
try
{
callback.Call(JsValue.Null, new JsValue[] { });
}
catch (Exception x)
{
Debug.WriteLine(x);
}
});
}
private void SetTimeout(ManticoreEngine engine, FunctionInstance callback, int timeout)
{
System.Timers.Timer timer = new System.Timers.Timer();
// TODO not sure there may be a better way to emulate NextTick
timer.Interval = Math.Max(1, timeout);
timer.AutoReset = false;
timer.Elapsed += (obj, args) =>
{
engine.Js(() =>
{
try
{
callback.Call(JsValue.Null, new JsValue[] { });
}
catch (Exception x)
{
// TODO perhaps throw this error INTO JS?
Log("error", x.ToString(), JsValue.Null);
}
});
};
timer.Start();
}
public void Fetch(ManticoreEngine engine, JsValue optionsValue, JsValue callback)
{
var options = optionsValue.As <ObjectInstance>();
JsValue rawBody = options.Get("nativeBody").As <FunctionInstance>().Call(options, ManticoreEngine.EmptyArgs);
var hasBody = rawBody.IsString() && rawBody.AsString().Length > 0;
var request = (HttpWebRequest)WebRequest.Create(options.Get("url").AsString());
request.Method = "GET";
if (options.HasProperty("method"))
{
request.Method = options.Get("method").AsString();
}
if (options.HasProperty("headers"))
{
var headers = options.Get("headers").AsObject();
var raw = headers.Get("raw").As <FunctionInstance>().Call(headers, ManticoreEngine.EmptyArgs);
if (raw.IsObject())
{
foreach (var p in raw.AsObject().GetOwnProperties())
{
if (p.Key.Equals("Content-Type", StringComparison.OrdinalIgnoreCase))
{
if (hasBody)
{
request.ContentType = p.Value.Value.Value.AsString();
}
}
else if (p.Key.Equals("If-Modified-Since", StringComparison.OrdinalIgnoreCase))
{
request.IfModifiedSince = DateTime.Parse(p.Value.Value.Value.AsString());
}
else
{
request.Headers.Add(p.Key, p.Value.Value.Value.AsString());
}
}
}
}
if (hasBody)
{
var body = rawBody.AsString();
byte[] bodyBytes;
if (options.HasProperty("isBase64") && options.Get("isBase64").AsBoolean())
{
bodyBytes = Convert.FromBase64String(body);
}
else
{
bodyBytes = Encoding.UTF8.GetBytes(body);
}
request.ContentLength = bodyBytes.Length;
var errorInstance = JsValue.Null;
try
{
var rqStream = request.GetRequestStream();
rqStream.Write(bodyBytes, 0, bodyBytes.Length);
rqStream.Close();
}
catch (Exception x)
{
// TODO fire this log into JS? manticore.onError()?
Log("error", x.ToString(), JsValue.Null);
var errorBuilder = new JsErrorBuilder(engine, x);
if (x is WebException)
{
errorBuilder.SetErrorCode((int)ErrorCodes.NetworkOffline);
}
errorInstance = errorBuilder.Build();
}
if (errorInstance != JsValue.Null)
{
engine.Js(() =>
{
callback.As <FunctionInstance>().Call(engine.ManticoreJsObject, new[] { errorInstance, JsValue.Null });
});
return;
}
}
sendRequest(engine, request, callback);
}
private void sendRequest(ManticoreEngine engine, HttpWebRequest request, JsValue callback)
{
request.BeginGetResponse((asyncResult) =>
{
HttpWebResponse response = null;
var errorInstance = JsValue.Null;
try
{
response = (HttpWebResponse)request.EndGetResponse(asyncResult);
}
catch (WebException e)
{
if (e.Status == WebExceptionStatus.ProtocolError) //Response was received from server but indicated protocol level error
{
response = (HttpWebResponse)e.Response;
}
else
{
errorInstance = new JsErrorBuilder(engine, e).SetErrorCode((int)ErrorCodes.NetworkOffline).Build();
}
}
if (response == null)
{
engine.Js(() =>
{
callback.As <FunctionInstance>().Call(engine.ManticoreJsObject, new[] { errorInstance, JsValue.Null });
});
return;
}
var responseInfo = engine.CreateJsObject();
if (response.Headers.Count > 0)
{
var headerCollection = engine.CreateJsObject();
foreach (var kv in response.Headers.AllKeys)
{
headerCollection.FastAddProperty(kv, new JsValue(response.Headers[kv]), false, true, false);
}
responseInfo.FastAddProperty("headers", headerCollection, false, true, false);
}
responseInfo.FastAddProperty("status", new JsValue((int)response.StatusCode), false, true, false);
// TODO find a way to sneak this wait into the gap between returning and asking for the results
// json/body/text signatures probably need to change to take a callback.
var memStream = new MemoryStream();
response.GetResponseStream().CopyTo(memStream);
var binaryResult = memStream.ToArray();
responseInfo.FastAddProperty("json", engine.AsJsFunction((thisObject, args) => {
return(engine.jsEngine.Json.Parse(JsValue.Null, new JsValue[] { Encoding.UTF8.GetString(binaryResult) }));
}), false, false, false);
responseInfo.FastAddProperty("body", engine.AsJsFunction((thisObject, args) => {
return(engine.jsEngine.Json.Parse(JsValue.Null, new JsValue[] { Convert.ToBase64String(binaryResult) }));
}), false, false, false);
responseInfo.FastAddProperty("text", engine.AsJsFunction((thisObject, args) => {
return(new JsValue(Encoding.UTF8.GetString(binaryResult)));
}), false, false, false);
engine.Js(() =>
{
callback.As <FunctionInstance>().Call(engine.ManticoreJsObject, new[] { errorInstance, responseInfo });
});
}, null);
}