We Keep Coding

C# API call from MarketStack and print values - Error 403

I would like to make a successful API call, then print the values in order to see if it works. My main goal is to analyze the data, after I can make a successful API call, and build a systematic strategy for trading.
System.Net.Http.HttpRequestException: "Response status code does not indicate success: 403 (Forbidden)
namespace marketstacktest
{
class Program
{
static async Task Main(string[] args)
{
Console.WriteLine("Hello World!");
var options = Options.Create(new MarketstackOptions() { ApiToken = "secretTokenHere" });
var marketstackService = new MarketstackService(options, NullLogger<MarketstackService>.Instance);
var appleSymbol = "AAPL";
var fromDate = DateTime.Now.AddDays(-200);
var toDate = DateTime.Now;
//error at the await System.Net.Http.HttpRequestException: "Response status code does not indicate success: 403 (Forbidden)."
List<Marketstack.Entities.Stocks.StockBar> stock = await marketstackService.GetStockEodBars(appleSymbol, fromDate, toDate);
foreach (var stock_i in stock)
{
Console.WriteLine($"close: {stock_i.Close}");
}
}
}
}

In the API manual, which is directly linked from the github, it gives information about all of the error codes. The relevant ones here are these two:
Code
Type
Description
403
https_access_restricted
HTTPS access is not supported on the current subscription plan.
403
function_access_restricted
The given API endpoint is not supported on the current subscription plan.
Their class library on github is just wrapping a json REST api. Every call to the API is just an http request, returning data as json objects. The 403 error indicates that your request was accepted as a valid request, but intentionally rejected by the server for some reason. And according to the docs, the error was because your account is not allowed access to either https or to the type of request.
Their free-tier subscription only includes end-of-day data, which is what you requested, so it wouldn't make sense for that not to be allowed. So, your app is almost certainly making an https call.
I went to the examples at the very beginning of their quick start guide, and chose the end-of-day example to match your app, and clicked on the link. It worked, and gave a bunch of json records. But, the request they made was using 'http' not 'https'.
Changing the requst to 'https' elicited a 403 response with this content (formatted for readability):
{
"error":
{
"code": "https_access_restricted",
"message": "Access Restricted - Your current Subscription Plan does not support HTTPS Encryption."
}
}
At this point we have enough to be almost certain that this is your issue. The final thing is to go look up how to turn https requests off in their class library. To avoid having to go through the code, I checked the help at the bottom of the page one more time, and found this (formatted for readability):
var options = Options.Create(new MarketstackOptions(){
ApiToken = apiKey,
MaxRequestsPerSecond = 3,
Https = true
});
Welp. This should probably be in their first example, since that's what people are most likely to try first, but it's not. So, to stop trying to make http requests, you just need to set the Https option to false in your code. You just need to add that to the options in your code, like so:
var options = Options.Create(new MarketstackOptions(){
ApiToken = "secretTokenHere",
Https = false
});
I will leave the testing to you, but from the browser test, we know that the request should work, unless there's a bug in their library. Given the information that was available, this is almost certainly the issue.

Autodesk Forge Error trying to access the API online

I have a problem loading a 3D model on an online server, the error shown is related to accessing the Forge API, locally works smoothly however when mounted on the server or a website is made marks the following error "Failed to load resource: the server responded with a status of 404 (Not Found)", then "onDocumentLoadFailure() - errorCode:7".
As I comment, what I find stranger is that, locally, it works. Attached the segment of the code where it displays the error.
function getAccessToken() {
var xmlHttp = null;
xmlHttp = new XMLHttpRequest();
xmlHttp.open("GET", '/api/forge/toke', false); //Address not found
xmlHttp.send(null);
return xmlHttp.responseText;
}
Thank you very much in advance.

Are you sure the code you're running locally and the code you've deployed are really the same?
The getAccessToken function doesn't seem to be correct, for several reasons:
First of all, there seems to be a typo in the URL - shouldn't it be /api/forge/token instead of /api/forge/toke?
More importantly, the HTTP request is asynchronous, meaning that it cannot return the response immediately after calling xmlHttp.send(). You can find more details about the usage of XMLHttpRequest in https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest.
And finally, assuming that the function is passed to Autodesk.Viewing.Initializer options, it should return the token using a callback parameter passed to it (as shown in https://forge.autodesk.com/en/docs/viewer/v7/developers_guide/viewer_basics/initialization/#example).
With that, your getAccessToken should probably look more like this (using the more modern fetch and async/await):
async function getAccessToken(callback) {
const resp = await fetch('/api/forge/token');
const json = await resp.json();
callback(json.access_token, json.expires_in);
}

I've already found the issue. When I make the deploy I have to change the url where the request is made for the public or the name of the domain. For example: mywebsite.com/aplication-name/api/forge/token.

SendGrid throws "Error while copying content to a stream"

I'm creating a Core 2.1 solution in Visual Studio 2017 where I send emails via Sendgrid. When trying to send an email via SendGrid, I get the following error:
An unhandled exception occurred while processing the request.
IOException: The server returned an invalid or unrecognized response.
System.Net.Http.HttpConnection.FillAsync() HttpRequestException: Error
while copying content to a stream.
System.Net.Http.HttpContent.LoadIntoBufferAsyncCore(Task
serializeToStreamTask, MemoryStream tempBuffer)
Here is what my code looks like. I'm entering the following in parameters:
recipients: list containing "****#gmail.com"
Subject: "Hello"
Body: Html generated via Heml. It compiles in an online editor without problem.
private async Task<bool> SendAsync(List<string> recipients, string subject, string body)
{
var client = new SendGridClient(this.configuration["Sendgrid:ApiKey"]);
var from = new EmailAddress(
this.configuration["Administration:MainEmailAddress"],
this.configuration["Administration:MainEmailName"]);
var tos = await GetRecipientsForEnvironment(recipients);
var message = MailHelper.CreateSingleEmailToMultipleRecipients(
from,
tos,
subject,
"",
body,
false);
var response = await client.SendEmailAsync(message);
return response.StatusCode == HttpStatusCode.Accepted;
}
What is the cause of this error?

It turns out that there is a known bug in Sendgrid. If the html content entered is very big, the correct error message will not be sent. Instead, this error will show up. In my case, my apiKey was not found and I should therefore have gotten an Unauthorized error message. When I changed my html into one much smaller, this gave me the correct error.
Read more about the issue here.

I'm having the same problem, but in my case it's because the email quota has expired (I'm using the free version for testing):
Lib version 9.21.0
On the mentioned thread https://github.com/sendgrid/sendgrid-csharp/issues/648 some people were passing the wrong apiKey, and others exceeding the HTML size.
As said in the thread above, apparently it's a bug in the sendgrid library when interpreting the error.
Therefore, in addition to the problems mentioned (passing the wrong apiKey, exceeding the HTML size) the return “Error while copying content to a stream” is hiding other problems as well (like in my case: quota expired).

HttpStatusCodeResult(401) returns "302 Found"

Using ASP.NET MVC 5, I would like to return appropriate HTTP status code for different scenarios (401 for user is not authenticated, 403 when user has no right for some resource, etc.), than handle them in jQuery.
But the problem is, when I try to return 401, it always returns "302: Found". What is the trick for a custom status code, and why this doesn't work?
public ActionResult My()
{
if (User.Identity.IsAuthenticated == false)
{
return new HttpStatusCodeResult(401, "User is not authenticated.");
// Returns "302: Found"
}
// ... other code ...
}
EDIT 1: Interesting bit:
If I replace the 401 with a 404 like this:
return new HttpNotFoundResult("User is not authenticated.");
Then it indeed gives a 404 and jQuery can catch the problem. However it's not an elegant solution as the error code is different.
EDIT 2: 302 is not good for me, as the result would be used in jQuery.get().fail(), but 302 won't triger fail()

Lol this is an awesome problem
The way auth works in MVC is that when you aren't logged in and try to access a secure page it throws a 401 exception. MVC then catches this exception and redirects the user to the login page (which is the 302 you are seeing)
I suppose there's a few things you can do to fix it:
Ignore it, its probably the behaviour you want anyway
Disable login page redirection (phil haack has a good article on this here: http://haacked.com/archive/2011/10/04/prevent-forms-authentication-login-page-redirect-when-you-donrsquot-want.aspx)
EDIT
As per your comments, the following code will turn all redirects into 401s when requested via ajax. This is one approach for avoiding the issue listed
public class MvcApplication : HttpApplication {
protected void Application_EndRequest() {
var context = new HttpContextWrapper(Context);
// If we're an ajax request, and doing a 302, then we actually need to do a 401
if (Context.Response.StatusCode == 302 && context.Request.IsAjaxRequest()) {
Context.Response.Clear();
Context.Response.StatusCode = 401;
}
}
}

AsyncCallback tied to a WebRequest is never reached

I have an ASPX page which should retrieve some content (some plain text data) asynchronously, and write something before/during/after the operation.
Currently, I can reach the "during" step but page content doesn't change anymore afterwards.
Big issue is I cannot perform any kind of debugging due to infrastructure (mis)configuration and not being allowed to run Remote Debugging Tools, I have to rely on publishing and see what happens...
Code behind looks like this (This is a .NET 3.5 (changing target framework is not an option) project created under VS2008 and later upgraded to VS2010)
void Page_Load()
{
myLabel = "Preparing to fetch content ...";
FetchContent();
}
void FetchContent()
{
try {
// "http://myUrl" returns text with header 'Content-disposition: inline;'
// If called directly, Text can be seen in the browser alright.
WebRequest request = WebRequest.Create("http://myUrl");
myLabel = "Fetching ...";
request.BeginGetResponse(new AsyncCallback((result)=>
{
//EXCEPTION HERE: 401 Unauthorized ??? url works via browser!
WebResponse resp = request.EndGetResponse(result);
StreamReader stream = new StreamReader(resp.GetResponseStream());
myLabel = "Done";
}
} catch {myLabel = "Request KO"; }
}
In the ASPX code, myLabel is simply shown:
<body>
<pre><%=myLabel %></pre>
</body>
The url responds fairly quickly if called from a browser, but in this code myLabel never shows Done., it stays on the Fetching... text like the callback is never fired.
Am I missing something obvious here ?
UPDATE
Closer inspection revealed that EndGetResponse returns a 401 Unauthorized status code. It works flawlessly if I invoke the exact same url via a browser though ! Some now more focused searching got me the solution now.

After finding out the 401 Unauthorized status code in the response, I managed to find other answers right here on SO which made me solve my (as it turns out) trivial issue adding this:
request.UseDefaultCredentials = true;