I am working on a gamification project whose goal is to build a WebGL game with Unity and post the final score as a grade on an assignment using the canvas LMS API. I need to know two things: how to authenticate using a bearer token for now (I know how to create the token already and I will need to use auth 2.0 later) and how to post a grade on an assignment using UnityWeb Request or similar. I have tried using restsharp, the vs code recognized it, but Unity did not. Also tried making a connection with node.js, Unity and node.js connected successfully, but the node wrappers I was using did not work.
In the worst cenario I would like to be able to post a comment on the assignment (I would pass the final grade as a string).
This is what I've tried with httpWebRequest:
string api_token = "bearer token here";
//initializing HttpWebRequest object
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("domain here");
IWebProxy theProxy = request.Proxy;
if (theProxy != null)
{
theProxy.Credentials = CredentialCache.DefaultCredentials;
}
CookieContainer cookies = new CookieContainer();
request.UseDefaultCredentials = true;
request.CookieContainer = cookies;
request.ContentType = "application/json";
request.CookieContainer = cookies;
// write the "Authorization" header
request.Headers.Add("Authorization", "Basic " + api_token);
request.Method = "POST";
// get the response
//WebResponse response = request.GetResponse();
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
StreamReader reader = new StreamReader(response.GetResponseStream());
Debug.Log(reader.ReadToEnd());
}
I need the node wrappers to do authentication and the post request.
The node wrappers: c10. I've tried with this one a lot and
node-canvas-api
I can access the api and post using postman.
I found out I can use code snippets on postman to retrieve the request in a certain language. With this, I didn't need the python APIs anymore as I was able to get the code directly. I still don't know why Unity did not recognize restSharp, but python solved my problem.
As it was hard for me to find how to post grades and comments on Canvas lms I will leave the PATH here for anyone who has the same problem:
PUT /api/v1/courses/:course_id/assignments/:assignment_id/submissions/:user_id
the query params are:
comment[text_comment] and submission[posted_grade].
Is there a way to achieve downloading via. the google-php-api? I have tried the following:
using the medialink and trying to curl the object (Returns "Login Required")
reading the guzzle response stream (comes back empty even though all the headers have the correct data)
I am able to see everything but the body of the file via. the API.
Edit:
I am of course able to download the file via the medialink, taken it is set to public - however that will not work for this situation.
The solution is as follows...
You must make an authorized HTTP request, to do this you must:
$object = $service->objects->listObjects(BUCKET, OBJECT);
$http = $client->authorize();
$request = new GuzzleHttp\Psr7\Request('GET', $object->getMediaLink());
$response = $http->send($request);
$body = $response->getBody()->read($object->getSize());
The above is a small snippet but the jist of what you need to get the contents of a file.
I am using AXIS2 as client for handling SOAP response. The client stubs are generated using WSDL2JAVA command. To solve an issue, I am trying to read an xml response stored in .xml file in the generated stub, and assign to SOAPEnvelope. Below is the code written to load .xml content :
InputStream is = new ByteArrayInputStream((sb.toString()).getBytes());
javax.xml.parsers.DocumentBuilderFactory factory = avax.xml.parsers.DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
javax.xml.parsers.DocumentBuilder builder = null;
builder = factory.newDocumentBuilder();
org.w3c.dom.Document doc = builder.parse(is);
System.out.println("Got Document ..............");
is.close();
org.apache.axis2.saaj.util.SAAJUtil su = new org.apache.axis2.saaj.util.SAAJUtil();
org.apache.axiom.soap.SOAPEnvelope _returnEnv1 = su.getSOAPEnvelopeFromDOOMDocument(doc);
Am getting ClassCastException at the last line in the code (assigning to SOAPEnvelope).
Can someone please help me with this.
Axis2clients are used to send requests and receive response. Why are you trying to load response from a file? You should receive the response from the backend service. Check this guide to get to know about the clientapi. You can find detail guide in axis2 documentation also.
ADFS 2.0, WIF (WS-Federation), ASP.NET: There is no http modules or any IdentityFoundation configuration defined in a web.config (like most WIF SDK samples show), instead everything is done via program code manually using WSFederationAuthenticationModule, ServiceConfiguration and SignInRequestMessage classes. I do http redirect to ADFS in a code and it seems to work fine, returning claims and redirecting user back to my web site with serialized claims in http request. So the question is how to parse this request using WIF classes, properties and methods and extract claims values from there? Thanks
Just in case want to share my experience, it might help somebody in the future. Well, solution I finally came to looks like this:
var message = SignInResponseMessage.CreateFromFormPost(Request) as SignInResponseMessage;
var rstr = new WSFederationSerializer().CreateResponse(message, new WSTrustSerializationContext(SecurityTokenHandlerCollectionManager.CreateDefaultSecurityTokenHandlerCollectionManager()));
var issuers = new ConfigurationBasedIssuerNameRegistry();
issuers.AddTrustedIssuer("630AF999EA69AF4917362D30C9EEA00C22D9A343", #"http://MyADFSServer/adfs/services/trust");
var tokenHandler = new Saml11SecurityTokenHandler {CertificateValidator = X509CertificateValidator.None};
var config = new SecurityTokenHandlerConfiguration{
CertificateValidator = X509CertificateValidator.None,
IssuerNameRegistry = issuers};
config.AudienceRestriction.AllowedAudienceUris.Add(new Uri("MyUri"));
tokenHandler.Configuration = config;
using(var reader=XmlReader.Create(new StringReader(rstr.RequestedSecurityToken.SecurityTokenXml.OuterXml)))
{
token = tokenHandler.ReadToken(reader);
}
ClaimsIdentityCollection claimsIdentity = tokenHandler.ValidateToken(token);
I found few similar code that uses SecurityTokenServiceConfiguration (it contains token handlers) instead of Saml11SecurityTokenHandler to read and parse token, however it did not work for me because of certificate validation failure. Setting SecurityTokenServiceConfiguration.CertificateValidator to X509CertificateValidator.None did not help coz Security Token Handler classes uses their own handler configuration and ignores STS configuration values, at least if you specify configuration parameters through the code like I did, however it works fine in case configuration is defined in web.config.
What I'm Trying To Do
I'm trying to create a solution of any kind that will run nightly on a Windows server, authenticate to a website, check a web page on the site for new links indicating a new version of a zip file, use new links (if present) to download a zip file, unzip the downloaded file to an existing folder on the server, use the unzipped contents (sql scripts, etc.) to build an instance of a database, and log everything that happens to a text file.
Forms App: The Part That Sorta Works
I created a Windows Forms app that uses a couple of WebBrowser controls, a couple of threads, and a few timers to do all that except the running nightly. It works great as a Form when I'm logged in and run it, but I need to get it (or something like it) to run on it's own like a Service or scheduled task.
My Service Attempt
So, I created a Windows Service that ticks every hour and, if the System.DateTime.Now.Hour >= 22, attempts to launch the Windows Forms app to do it's thing. When the Service attempts to launch the Form, this error occurs:
ActiveX control '8856f961-340a-11d0-a96b-00c04fd705a2' cannot be instantiated because the current thread is not in a single-threaded apartment.
which I researched and tried to resolve by either placing the [STAThread] attribute on the Main method of the Service's Program class or using some code like this in a few places including the Form constructor:
webBrowseThread = new Thread(new ThreadStart(InitializeComponent));
webBrowseThread.SetApartmentState(ApartmentState.STA);
webBrowseThread.Start();
I couldn't get either approach to work. In the latter approach, the controls on the Form (which would get initialized inside IntializeComponent) don't get initialized and I get null reference exceptions.
My Scheduled Task Attempt
So, I tried creating a nightly scheduled task using my own credentials to run the Form locally on my dev machine (just testing). It gets farther than the Service did, but gets hung up at the File Download Dialog.
Related Note: To send the key sequences to get through the File Download and File Save As dialogs, my Form actually runs a couple of vbscript files that use WScript.Shell.SendKeys. Ok, that's embarassing to admit, but I tried a few different things including SendMessage in Win32 API and referencing IWshRuntimeLibrary to use SendKeys inside my C# code. When I was researching how to get through the dialogs, the Win32 API seemed to be the recommended way to go, but I couldn't figure it out. The vbscript files was the only thing I could get to work, but I'm worried now that this may be the reason why a scheduled task won't work.
Regarding My Choice of WebBrowser Control
I have read about the System.WebClient class as an alternative to the WebBrowser control, but at a glance, it doesn't look like it has what I need to get this done. For example, I needed (or I think I needed) the WebBrowser's DocumentCompleted and FileDownload events to handle the delays in pages loading, files downloading, etc. Is there more to WebClient that I'm not seeing? Is there another class besides WebBrowser that is more Service-friendly and would do the trick?
In Summary
Geez, this is long. Sorry! It would help to even have a high level recommendation for a better way to do what I'm trying to do, because nothing I've tried has worked.
Update 10/22/09
Well, I think I'm closer, but I'm stuck again. I should end up with a decent-sized zip file with several files in it, but the zip file resulting from my code is empty. Here's my code:
// build post request
string targetHref = "http://wwwcf.nlm.nih.gov/umlslicense/kss/login.cfm";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(targetHref);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
// encoding to use
Encoding enc = Encoding.GetEncoding(1252);
// build post string containing authentication information and add to post request
string poststring = "returnUrl=" + fixCharacters(targetDownloadFileUrl);
poststring += getUsernameAndPasswordString();
poststring += "&login2.x=0&login2.y=0";
// convert to required byte array
byte[] postBytes = enc.GetBytes(poststring);
request.ContentLength = postBytes.Length;
// write post to request
Stream postStream = request.GetRequestStream();
postStream.Write(postBytes, 0, postBytes.Length);
postStream.Close();
// get response as stream
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
// writes stream to zip file
FileStream writeStream = new FileStream(fullZipFileName, FileMode.Create, FileAccess.Write);
ReadWriteStream(responseStream, writeStream);
response.Close();
responseStream.Close();
The code for ReadWriteStream looks like this.
private void ReadWriteStream(Stream readStream, Stream writeStream)
{
// taken verbatum from http://www.developerfusion.com/code/4669/save-a-stream-to-a-file/
int Length = 256;
Byte[] buffer = new Byte[Length];
int bytesRead = readStream.Read(buffer, 0, Length);
// write the required bytes
while (bytesRead > 0)
{
writeStream.Write(buffer, 0, bytesRead);
bytesRead = readStream.Read(buffer, 0, Length);
}
readStream.Close();
writeStream.Close();
}
The building of the post string is taken from my previous forms app that works. I compared the resulting values in poststring for both sets of code (my working forms app and this one) and they're identical.
I'm not even sure how to troubleshoot this further. Anyone see anything obvious as to why this isn't working?
Conclusion 10/23/09
I finally have this working. A couple of important hurdles I had to get over. I had some problems with the ReadWriteStream method code that I got online. I don't know why, but it wasn't working for me. A guy named JB in Claudio Lassala's Virtual Brown Bag meeting helped me to come up with this code which worked much better for my purposes:
private void WriteResponseStreamToFile(Stream responseStreamToRead, string zipFileFullName)
{
// responseStreamToRead will contain a zip file, write it to a file in
// the target location at zipFileFullName
FileStream fileStreamToWrite = new FileStream(zipFileFullName, FileMode.Create);
int readByte = responseStreamToRead.ReadByte();
while (readByte != -1)
{
fileStreamToWrite.WriteByte((byte)readByte);
readByte = responseStreamToRead.ReadByte();
}
fileStreamToWrite.Flush();
fileStreamToWrite.Close();
}
As Will suggested below, I did have trouble with the authentication. The following code is what worked to get around that issue. A few comments inserted addressing key issues I ran into.
string targetHref = "http://wwwcf.nlm.nih.gov/umlslicense/kss/login.cfm";
HttpWebRequest firstRequest = (HttpWebRequest)WebRequest.Create(targetHref);
firstRequest.AllowAutoRedirect = false; // this is critical, without this, NLM redirects and the whole thing breaks
// firstRequest.Proxy = new WebProxy("127.0.0.1", 8888); // not needed for production, but this helped in order to debug the http traffic using Fiddler
firstRequest.Method = "POST";
firstRequest.ContentType = "application/x-www-form-urlencoded";
// build post string containing authentication information and add to post request
StringBuilder poststring = new StringBuilder("returnUrl=" + fixCharacters(targetDownloadFileUrl));
poststring.Append(getUsernameAndPasswordString());
poststring.Append("&login2.x=0&login2.y=0");
// convert to required byte array
byte[] postBytes = Encoding.UTF8.GetBytes(poststring.ToString());
firstRequest.ContentLength = postBytes.Length;
// write post to request
Stream postStream = firstRequest.GetRequestStream();
postStream.Write(postBytes, 0, postBytes.Length); // Fiddler shows that post and response happen on this line
postStream.Close();
// get response as stream
HttpWebResponse firstResponse = (HttpWebResponse)firstRequest.GetResponse();
// create new request for new location and cookies
HttpWebRequest secondRequest = (HttpWebRequest)WebRequest.Create(firstResponse.GetResponseHeader("location"));
secondRequest.AllowAutoRedirect = false;
secondRequest.Headers.Add(HttpRequestHeader.Cookie, firstResponse.GetResponseHeader("Set-Cookie"));
// get response to second request
HttpWebResponse secondResponse = (HttpWebResponse)secondRequest.GetResponse();
// write stream to zip file
Stream responseStreamToRead = secondResponse.GetResponseStream();
WriteResponseStreamToFile(responseStreamToRead, fullZipFileName);
responseStreamToRead.Close();
sl.logScriptActivity("Downloading update.");
firstResponse.Close();
I want to underscore that setting AllowAutoRedirect to false on the first HttpWebRequest instance was critical to the whole thing working. Fiddler showed two additional requests that occurred when this was not set, and it broke the rest of the script.
You're trying to use UI controls to do something in a windows service. This will never work.
What you need to do is just use the WebRequest and WebResponse classes to download the contents of the webpage.
var request = WebRequest.Create("http://www.google.com");
var response = request.GetResponse();
var stream = response.GetResponseStream();
You can dump the contents of the stream, parse the text looking for updates, and then construct a new request for the URL of the file you want to download. That response stream will then have the file, which you can dump on the filesystem and etc etc.
Before you wonder, GetResponse will block until the response returns, and the stream will block as data is being received, so you don't need to worry about events firing when everything has been downloaded.
You definitely need to re-think your approach (as you've already begun to do) to eliminate the Forms-based application approach. The service you're describing needs to operate with no UI at all.
I'm not familiar with the details of System.WebClient, but since it
provides common methods for sending
data to and receiving data from a
resource identified by a URI,
it will probably be your answer.
At first glance, WebClient.DownloadFile(...) or WebClient.DownloadFileAsync(...) will do what you need.
The only thing I can add is that once you have scraped your screen and have the fully qualified name of the file you want to download, you could pass it along to the Windows/DOS command 'get' which will fetch files via HTTP. You can also script a command-line FTP client if desired. It's been a long time since I tried something like this in Windows, but I think you're almost there. Once you have fetched the correct file, building a batch file to do everything else should be pretty easy. If you are more comfortable with Unix, google "unix services for windows" just keep an eye on the services they start running (DHCP, etc). There are some nice utilities which will let your treat dos as a unix-like shell (ls -l, grep, etc) Finally, you could try another language like Perl or Python but I don't think that's the kind of advice you were looking for. :)