I'm having a little trouble using AmazonCloudWatch to fetch CPU Utilization. When I try to use AmazonCloudWatch.GetMetricStatistics(), I get this for an exception message:
Exception of type 'Amazon.CloudWatch.AmazonCloudWatchException' was thrown.
And this for an inner exception:
{"The remote server returned an error: (400) Bad Request."}
Here is the code I'm using to make the call:
public static String getCPUStats(String Endpoint, String InstanceID)
{
try
{
AmazonCloudWatchConfig cloudConfig = new AmazonCloudWatchConfig();
cloudConfig.ServiceURL = Endpoint;
string AWSAccessKey = Sql.ToString(appConfig["AWSAccessKey"]);
string AWSSecretKey = Sql.ToString(appConfig["AWSSecretKey"]);
AmazonCloudWatch client = AWSClientFactory.CreateAmazonCloudWatchClient(AWSAccessKey, AWSSecretKey, cloudConfig);
GetMetricStatisticsRequest request = new GetMetricStatisticsRequest();
request.Dimensions.Add(new Dimension { Name = "InstanceId", Value = InstanceID });
request.StartTime = DateTime.UtcNow.AddMinutes(-5);
request.EndTime = DateTime.UtcNow;
request.Namespace = "AWS/EC2";
request.Statistics.Add("Maximum");
request.Statistics.Add("Average");
request.MetricName = "CPUUtilization";
request.Period = 60;
GetMetricStatisticsResponse r = client.GetMetricStatistics(request);
if (r.GetMetricStatisticsResult.Datapoints.Count > 0)
{
Datapoint dataPoint = r.GetMetricStatisticsResult.Datapoints[0];
return "CPU maximum load: " + dataPoint.Maximum;
}
return "No data available.";
}
catch (Exception ex)
{
return ex.Message;
}
}
Some side notes - the access key, secret access key, and endpoint work fine for creating an AmazonEC2Client, so I'm pretty sure the problem isn't there.
I've done quite a bit of googling and poring over the documentation, but haven't been successful in solving this. Any ideas? Thanks so much!
Unfortunately, we weren't able to figure this one out - we ended up deciding to use Microsoft Azure instead of Amazon Web Services :(
I think you can only request one Statistics at a time. So try removing either request.Statistics.Add("Maximum"); or request.Statistics.Add("Average");
Related
I am trying to create a simple Xamarin forms app which allows the user to browse for or take a photo and have azure cognitive services tag the photo using a custom vision model.
I am unable to get the client to successfully authenticate or find a resource per the error message in the exception produced by the VisionServiceClient. Am I missing something? What would be the correct values to use for the arguments to VisionServiceClient?
All keys have been removed from the below images, they are populated.
Exception thrown in VS2017:
'Microsoft.ProjectOxford.Vision.ClientException' in System.Private.CoreLib.dll
Call to VisionServiceClient:
private const string endpoint = #"https://eastus2.api.cognitive.microsoft.com/vision/prediction/v1.0";
private const string key = "";
VisionServiceClient visionClient = new VisionServiceClient(key, endpoint);
VisualFeature[] features = { VisualFeature.Tags, VisualFeature.Categories, VisualFeature.Description };
try
{
AnalysisResult temp = await visionClient.AnalyzeImageAsync(imageStream,
features.ToList(), null);
return temp;
}
catch(Exception ex)
{
return null;
}
VS Exception Error:
Azure Portal for cognitive services:
Custom Vision Portal:
It looks like you're confusing the Computer Vision and the Custom Vision APIs. You are attempting to use the client SDK for the former using the API key of the latter.
For .NET languages, you'll want the Microsoft.Azure.CognitiveServices.Vision.CustomVision.Prediction NuGet package.
Your code will end up looking something like this:
ICustomVisionPredictionClient client = new CustomVisionPredictionClient()
{
ApiKey = PredictionKey,
Endpoint = "https://southcentralus.api.cognitive.microsoft.com"
};
ImagePrediction prediction = await client.PredictImageAsync(ProjectId, stream, IterationId);
Thank you to cthrash for the extended help and talking with me in chat. Using his post along with a little troubleshooting I have figured out what works for me. The code is super clunky but it was just to test and make sure I'm able to do this. To answer the question:
Nuget packages and classes
Using cthrash's post I was able to get both the training and prediction nuget packages installed, which are the correct packages for this particular application. I needed the following classes:
Microsoft.Azure.CognitiveServices.Vision.CustomVision.Prediction
Microsoft.Azure.CognitiveServices.Vision.CustomVision.Prediction.Models
Microsoft.Azure.CognitiveServices.Vision.CustomVision.Training
Microsoft.Azure.CognitiveServices.Vision.CustomVision.Training.Models
Endpoint Root
Following some of the steps Here I determined that the endpoint URL's only need to be the root, not the full URL provided in the Custom Vision Portal. For instance,
https://southcentralus.api.cognitive.microsoft.com/customvision/v2.0/Prediction/
Was changed to
https://southcentralus.api.cognitive.microsoft.com
I used both the key and endpoint from the Custom Vision Portal and making that change I was able to use both a training and prediction client to pull the projects and iterations.
Getting Project Id
In order to use CustomVisionPredictionClient.PredictImageAsync you need a Guid for the project id and an iteration id if a default iteration is not set in the portal.
I tested two ways to get the project id,
Using project id string from portal
Grab the project id string from the portal under the project settings.
For the first argument to PredictImageAsync pass
Guid.Parse(projectId)
Using the training client
Create a new CustomVisionTrainingClient
To get a list of <Project> use
TrainingClient.GetProjects().ToList()
In my case I only had a single project so I would just need the first element.
Guid projectId = projects[0].Id
Getting Iteration Id
To get the iteration id of a project you need the CustomVisionTrainingClient.
Create the client
To get a list of <Iteration> use
client.GetIterations(projectId).ToList()
In my case I had only a single iteration so I just need the first element.
Guid iterationId = iterations[0].Id
I am now able to use my model to classify images. In the code below, fileStream is the image stream passed to the model.
public async Task<string> Predict(Stream fileStream)
{
string projectId = "";
//string trainingEndpoint = "https://southcentralus.api.cognitive.microsoft.com/customvision/v2.2/Training/";
string trainingEndpoint = "https://southcentralus.api.cognitive.microsoft.com/";
string trainingKey = "";
//string predictionEndpoint = "https://southcentralus.api.cognitive.microsoft.com/customvision/v2.0/Prediction/";
string predictionEndpoint = "https://southcentralus.api.cognitive.microsoft.com";
string predictionKey = "";
CustomVisionTrainingClient trainingClient = new CustomVisionTrainingClient
{
ApiKey = trainingKey,
Endpoint = trainingEndpoint
};
List<Project> projects = new List<Project>();
try
{
projects = trainingClient.GetProjects().ToList();
}
catch(Exception ex)
{
Debug.WriteLine("Unable to get projects:\n\n" + ex.Message);
return "Unable to obtain projects.";
}
Guid ProjectId = Guid.Empty;
if(projects.Count > 0)
{
ProjectId = projects[0].Id;
}
if (ProjectId == Guid.Empty)
{
Debug.WriteLine("Unable to obtain project ID");
return "Unable to obtain project id.";
}
List<Iteration> iterations = new List<Iteration>();
try
{
iterations = trainingClient.GetIterations(ProjectId).ToList();
}
catch(Exception ex)
{
Debug.WriteLine("Unable to obtain iterations.");
return "Unable to obtain iterations.";
}
foreach(Iteration itr in iterations)
{
Debug.WriteLine(itr.Name + "\t" + itr.Id + "\n");
}
Guid iteration = Guid.Empty;
if(iterations.Count > 0)
{
iteration = iterations[0].Id;
}
if(iteration == Guid.Empty)
{
Debug.WriteLine("Unable to obtain project iteration.");
return "Unable to obtain project iteration";
}
CustomVisionPredictionClient predictionClient = new CustomVisionPredictionClient
{
ApiKey = predictionKey,
Endpoint = predictionEndpoint
};
var result = await predictionClient.PredictImageAsync(Guid.Parse(projectId), fileStream, iteration);
string resultStr = string.Empty;
foreach(PredictionModel pred in result.Predictions)
{
if(pred.Probability >= 0.85)
resultStr += pred.TagName + " ";
}
return resultStr;
}
I have a service which uses a Yahoo! Finance table yahoo.finance.xchange. This morning I noticed it has stopped working because suddenly Yahoo! started to return an error saying:
{
"error": {
"lang": "en-US",
"description": "No definition found for Table yahoo.finance.xchange"
}
}
This is the request URL. Interesting fact: if I try to refresh the query multiple times, sometimes I get back a correct response but this happen very rarely (like 10% of the time). Days before, everything was fine.
Does this mean Yahoo API is down or am I missing something because the API was changed? I would appreciate any help.
Since I have the same problem and that it started today too, that others came to post exactly in the same time as well, and that it still works most of the time, the only explanation I can find is that they have some random database errors on their end and we can hope that this will be solved soon. I also have a 20% rate of failures when refreshing the page of the query.
My guess is that they use many servers to handle the requests (let's say 8) and that one of them is empty or doesn't have that table for some reasons so whenever it directs the query to that server, the error is returned.
Temporary solution: Just modify your script to retry 3-4 times. That did it for me because among 5 attempts at least one succeeds.
I solve this issue by using quote.yahoo.com instead of the query.yahooapis.com service. Here's my code:
function devise($currency_from,$currency_to,$amount_from){
$url = "http://quote.yahoo.com/d/quotes.csv?s=" . $currency_from . $currency_to . "=X" . "&f=l1&e=.csv";
$handle = fopen($url, "r");
$exchange_rate = fread($handle, 2000);
fclose($handle );
$amount_to = $amount_from * $exchange_rate;
return round($amount_to,2);
}
EDIT the above no longer works. At this point, lets just forget about yahoo lol Use this instead
function convertCurrency($from, $to, $amount)
{
$url = file_get_contents('https://free.currencyconverterapi.com/api/v5/convert?q=' . $from . '_' . $to . '&compact=ultra');
$json = json_decode($url, true);
$rate = implode(" ",$json);
$total = $rate * $amount;
$rounded = round($total);
return $total;
}
Same error, i migrate to http://finance.yahoo.com
Here is C# example
private static readonly ILog Log = LogManager.GetCurrentClassLogger();
private int YahooTimeOut = 4000;
private int Try { get; set; }
public decimal GetRate(string from, string to)
{
var url =
string.Format(
"http://finance.yahoo.com/d/quotes.csv?e=.csv&f=sl1d1t1&s={0}{1}=X", from, to);
var request = (HttpWebRequest)WebRequest.Create(url);
request.UseDefaultCredentials = true;
request.ContentType = "text/csv";
request.Timeout = YahooTimeOut;
try
{
using (var response = (HttpWebResponse)request.GetResponse())
{
var resStream = response.GetResponseStream();
using (var reader = new StreamReader(resStream))
{
var html = reader.ReadToEnd();
var values = Regex.Split(html, ",");
var rate = Convert.ToDecimal(values[1], new CultureInfo("en-US"));
if (rate == 0)
{
Thread.Sleep(550);
++Try;
return Try < 5 ? GetRate(from, to) : 0;
}
return rate;
}
}
}
catch (Exception ex)
{
Log.Warning("Get currency rate from Yahoo fail " + ex);
Thread.Sleep(550);
++Try;
return Try < 5 ? GetRate(from, to) : 0;
}
}
I've got the same issue.
I need exchange rates in my app, so I decided to use currencylayer.com API instead - they give 168 currencies, including precious metals and Bitcoin.
I've also written a microservice using webtask.io to cache rates from currencylayer and do cross-rate calculations.
And I've written a blog post about it 🤓
Check it out if you want to run your own microservice, it's pretty easy 😉
I found solution, in my case, just change http to https and everything works fine.
I am new to Windows universal apps development. Now I am developing an app in which I have to integrate PayU. I tried a lot but everytime the transaction error is thrown from the server.
string temp1 = "key=xxxxxx&txnid=xxxxxx&hash=hashValue&amount=xxx&firstname=abc" +
"&email=a#a.com&phone=80xxxxxxxx&productinfo=xxxxxxxxxxxx" +
"&surl=https://www.google.com&furl=https://www.twitter.com" +
"&udf1=a&udf2=b&udf3=c&udf4=d&udf5=e&pg=CC&bankcode=CC" +
"&ccardtype=CC&ccnum=1234xxxxxxxxx&ccname=xxx&ccvv=xxx" +
"&ccexpmon=xx&ccexpyr=xxxx";
var httpClient = new Windows.Web.Http.HttpClient();
Windows.Web.Http.HttpRequestMessage httpRequestMessage = new Windows.Web.Http.HttpRequestMessage(Windows.Web.Http.HttpMethod.Post, theUri);
Windows.Web.Http.IHttpContent content = new Windows.Web.Http.HttpStringContent(temp1, Windows.Storage.Streams.UnicodeEncoding.Utf8);
httpRequestMessage.Content = content;
try
{
webView.NavigateWithHttpRequestMessage(httpRequestMessage);
}
catch(Exception f)
{
new MessageDialog(f.ToString()).ShowAsync();
}
And I am creating the hashValue by using method :
public String SampleHashMsg(String strMsg)
{
// Convert the message string to binary data.
string strAlgName = HashAlgorithmNames.Sha512;
IBuffer buffUtf8Msg = CryptographicBuffer.ConvertStringToBinary(strMsg, BinaryStringEncoding.Utf8);
// Create a HashAlgorithmProvider object.
HashAlgorithmProvider objAlgProv = HashAlgorithmProvider.OpenAlgorithm(strAlgName);
// Demonstrate how to retrieve the name of the hashing algorithm.
String strAlgNameUsed = objAlgProv.AlgorithmName;
// Hash the message.
IBuffer buffHash = objAlgProv.HashData(buffUtf8Msg);
// Verify that the hash length equals the length specified for the algorithm.
if (buffHash.Length != objAlgProv.HashLength)
{
throw new Exception("There was an error creating the hash");
}
// Convert the hash to a string (for display).
//String strHashBase64 = CryptographicBuffer.EncodeToBase64String(buffHash);
String strHashBase64 = CryptographicBuffer.EncodeToHexString(buffHash);
// Return the encoded string
return strHashBase64;
}
I should load the request to the webview. But I am getting an error "Transaction Error" in that.
I am getting transaction error, txnid is not provided. Well at PayU side the sent hash key will be used for verify a transaction. May be my txnid and the txnid contained by hash does not match and payu server denies the transaction saying that provide txnid.
I am using Microsoft Visual Studio 2013 Universal apps for the app development.
But still I am not getting correct result. Please if anyone can help me out, then please reply immediately. Thanks in advance.
So I'm getting an error code 400 with a keyInvalid reason:
json = {
error = {
code = 400;
errors = (
{
domain = usageLimits;
message = "Bad Request";
reason = keyInvalid;
}
);
message = "Bad Request";
};
}
I'm using the correct API call I'm sure:
https://www.googleapis.com/language/translate/v2?key=INSERT-YOUR-KEY&q=hello%20world&source=en&target=de
And for INSERT-YOUR-KEY I've tried both the Client ID and the Client secret.
Also, I do have the Translate API turned on in the console.
Oh lord, what a waste of time - mostly my fault! So I needed to create a public API key, which was the second option on the page staring right in the face this whole time. One of those days...
Welcome!
I have a little problem with own application. This app can be connect(sith socket) an FTP server, and its work fine. But my problem is, if the user use bad usernam or password, the program won't receive the response statucode. Whats wrong?
I would like to use this statuscode some clause to examine(usernem or/and password etc.)
Code:
public static void ReadResponse()
{
result = ParseHostResponse();
statusCode = int.Parse(result.Substring(0, 3));
statusMessage = "";
}
The ParseHostResponse() method contains next:
Code:
public static string ParseHostResponse()
{
SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
socketEventArg.RemoteEndPoint = socket.RemoteEndPoint;
socketEventArg.SetBuffer(buffer, BUFFER_SIZE, 0);
socketEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs e)
{
if (e.SocketError == SocketError.Success)
{
statusMessage = Encoding.UTF8.GetString(e.Buffer, e.Offset, e.BytesTransferred);
statusMessage = statusMessage.Trim('\0');
}
else
{
statusMessage = e.SocketError.ToString();
}
});
socket.ReceiveAsync(socketEventArg);
string[] msg = statusMessage.Split('\n');
if (statusMessage.Length > 2)
{
statusMessage = msg[msg.Length - 2];
}
else
{
statusMessage = msg[0];
}
if (!statusMessage.Substring(3, 1).Equals(" "))
{
return ParseHostResponse();
}
return statusMessage;
}
If I invite to the ReadResponse() method, the Visual Studio answer with this exception: NullReferenceException
in this code:
Code:
.
.
string[] msg = statusMessage.Split('\n');
.
What is the wrong? This code issue to http://msdn.microsoft.com/en-us/library/hh202858%28v=vs.92%29.aspx#BKMK_RECEIVING
Thank you for your help!
I can't help, but have to start with these side remarks:
statusMessage.Trim('\0') does not work (try it)
statusMessage.Split('\n') is inefficient as it involves extra allocations (guess why)
Now to the actual subject: I never used sockets on WP7, but from what I know about async operations it looks to me that you start async op (by calling ReceiveAsync) and use the result (statusMessage) before the answer arrives.
Think a bit about your design of the ParseHostResponse() method:
Bad name: Indicates parsing of a response, while it actually performs communication
Bad functionality: The method indicates sync patter, but internally uses async pattern. I don't know what to suggest here as every solution seems to be wrong. For example waiting for a response will make UI irresposible.
My main recommendation is that you get more information about async programming and then reprogramm your app accordingly.