Develop Reference

How do i create an ACTION file AS3

I can not understand why I get an error on the page?
How do I save the random files I get?
Every time it shows me an error regarding both files
public class Captcha extends MovieClip
{
public var captchaClip:MovieClip;
public var reloadBut:SimpleButton;
public var captchaText:TextField;
public var captchaBG:MovieClip;
private var captchaLoader:Loader = null;
private var url:String = null;
private var imageWidth:int;
private var imageHeight:int;
private var reloadButton:Object;
public function Captcha()
{
this.captchaText.defaultTextFormat = TextFormats.format(14, true, TextFormatAlign.CENTER);
this.captchaText.multiline = false;
this.captchaText.restrict = "1234567890";
this.reloadButton = getChildByName("reloadBut");
if (this.reloadButton)
{
this.reloadButton.addEventListener(MouseEvent.CLICK, this.reloadButClick, 0, false, true);
}
return;
}// end function
private function reloadButClick(event:MouseEvent) : void
{
this.reset();
event.stopImmediatePropagation();
return;
}// end function
public function getUserInput() : String
{
return this.captchaText.text;
}// end function
public function setUrl(param1:String, param2:int = 3, param3:int = 72, param4:int = 25)
{
this.url = param1;
this.imageHeight = param4;
this.imageWidth = param3;
this.captchaText.maxChars = param2;
return;
}// end function
public function reset()
{
this.captchaText.text = "";
this.loadCaptcha();
return;
}// end function
private function loadCaptcha()
{
this.captchaText.text = "";
this.captchaLoader = new Loader();
this.captchaLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, this.captchaLoaded);
this.captchaLoader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, this.captchaLoadError);
var _loc_1:* = new LoaderContext();
_loc_1.checkPolicyFile = true;
var _loc_2:* = new URLRequest(this.url + "?random=" + Math.random());
this.captchaLoader.load(_loc_2, _loc_1);
return;
}// end function
private function captchaLoadError(event:IOErrorEvent) : void
{
event.target.removeEventListener(Event.COMPLETE, this.captchaLoaded);
event.target.removeEventListener(IOErrorEvent.IO_ERROR, this.captchaLoadError);
return;
}// end function
private function captchaLoaded(event:Event) : void
{
event.target.removeEventListener(Event.COMPLETE, this.captchaLoaded);
event.target.removeEventListener(IOErrorEvent.IO_ERROR, this.captchaLoadError);
var _loc_2:* = event.target.content;
_loc_2.height = this.imageHeight;
_loc_2.width = this.imageWidth;
this.captchaClip.addChild(_loc_2);
return;
}// end function
}
Do I need to build these files? If so what should be inside these ACTION files?
Here you can see the errors that are created for me:
Thanks for understanding (I'm pretty new to the language so help really got needed).

You have to implement and/or connect to an existing CAPTCHA server that would provide your code with images and solutions. Your localhost:8080 web server apparently does not know how to react on your CAPTCHA requests thus returns a 404.

Is there an ASP.NET Boilerplate Way of getting JSON data?

I am currently trying this, but I keep seeing the dreaded error:
Unexpected token o in JSON at position 1
I am struggling to find a solution and was wondering if anyone has any tips on how to solve this?
The class being serialized to JSON:
[Serializable]
public class GeoCoordinate
{
public GeoCoordinate()
{
}
[JsonProperty(PropertyName = "lat")]
public double Latitude { get; }
[JsonProperty(PropertyName = "long")]
public double Longitude { get; }
public GeoCoordinate(double latitude, double longitude)
{
Latitude = latitude;
Longitude = longitude;
}
public override string ToString()
{
return string.Format("{0},{1}", Latitude, Longitude);
}
}
Ajax call:
function getLocationData() {
jQuery.ajax({
url: abp.appPath + "Home/GetLocationsAsync",
type: "GET",
dataType: "json",
async: true,
success: function (data) {
var myArray = jQuery.parseJSON(data);
locations = [];
$.each(myArray, function (index, element) {
locations.push([element.lat, element.long]);
});
}
});
}
Controller:
[HttpGet]
public async Task<JsonResult> GetLocationsAsync()
{
var cords = await _practiceAppService.GetAllGeoCoordinates();
return Json(cords);
}
AppService:
public async Task<IList<GeoCoordinate>> GetAllGeoCoordinates()
{
var geoCoordinates = await Repository.GetAll()
.Where(x => !x.Disabled && !x.Latitude.Equals(0) && !x.Longitude.Equals(0))
.Select(x => new GeoCoordinate(x.Latitude, x.Longitude))
.ToListAsync();
return geoCoordinates;
}
Console.log of data before attempted call to parseJSON:
console.log(data);
var myArray = jQuery.parseJSON(data);

Coincidentally, there is a section called The ASP.NET Boilerplate Way that exactly addresses this.
Note that only point 2 is specific to ABP:
GetLocationsAsync returns a JSON object and not a string, so you should not call parseJSON.
You can reproduce the error message with: jQuery.parseJSON({});
ABP wraps JsonResult. From the documentation on AJAX Return Messages:
This return format is recognized and handled by the abp.ajax function.
You could use [DontWrapResult] attribute, but you might as well leverage on ABP here. abp.ajax handles the display of error messages if you throw a UserFriendlyException.
Since ajax is asynchronous, getLocationData cannot return locations directly.
You can return a chained Promise. If you're new to Promises, read Using Promises first.
There's a neater way than $.each and push.
You can use map.
Finally:
function getLocationData() {
return abp.ajax({
url: abp.appPath + "Home/GetLocationsAsync",
type: 'GET'
}).then(function (result) {
return result.map(function (element) {
return [element.lat, element.long];
});
});
}
Usage:
getLocationData().then(function (locations) {
console.log(locations);
});

ASP.NET Boilerplate wraps ASP.NET MVC action results by default if the return type is a JsonResult. So if you want to get the result you can disable wrapping. Try adding [DontWrapResult] attribute to the GetLocationsAsync method.
[DontWrapResult]
[HttpGet]
public async Task<JsonResult> GetLocationsAsync()
{
var cords = await _practiceAppService.GetAllGeoCoordinates();
return Json(cords);
}
PS: You don't need to add this attribute. You can get it from result field. Inspect the response via your browser's dev console to see how it's wrapped.

Is it possible to return a string from C# to Javascript using Xamarin.iOS?

I have used HybridWebView from XLabs to build a HybridWebView that can communicate with C# code. I have build custom renderers to do this. In simple terms I have:
iOS
public class HybridWebViewRenderer : ViewRenderer<HybridWebView, WKWebView>, IWKScriptMessageHandler
{
const string JavaScriptFunctionTemplate = "function {0}(){{window.webkit.messageHandlers.invokeAction.postMessage('{0}|' + JSON.stringify(arguments));}}";
protected override void OnElementChanged(ElementChangedEventArgs<HybridWebView> e)
{
base.OnElementChanged(e);
if (Control == null)
{
userController = new WKUserContentController();
foreach (var f in Element.RegisteredFunctions.Where(ff => !ff.IsInjected))
{
var script = new WKUserScript(new NSString(string.Format(JavaScriptFunctionTemplate, f.Name)), WKUserScriptInjectionTime.AtDocumentEnd, false);
userController.AddUserScript(script);
f.Injected();
}
userController.AddScriptMessageHandler(this, "invokeAction");
var config = new WKWebViewConfiguration { UserContentController = userController };
var webView = new WKWebView(Frame, config)
{
NavigationDelegate = new CustomWKNavigationDelegate(this.Element)
};
SetNativeControl(webView);
}
if (e.OldElement != null)
{
userController.RemoveAllUserScripts();
userController.RemoveScriptMessageHandler("invokeAction");
var hybridWebView = e.OldElement as HybridWebView;
hybridWebView.Cleanup();
}
if (e.NewElement != null)
{
Load(Element.Uri);
}
}
public void DidReceiveScriptMessage(WKUserContentController userContentController, WKScriptMessage message)
{
var bits = message.Body.ToString().Split('|');
if (bits.Count() == 2)
{
var result = Element.InvokeFunction(bits[0], bits[1]);
//How do I return result back to Javascript function?
}
}
the InvokeFunction method returns a value result which is a string.
How can I return this string result back to the javascript function which was injected?
Edit
Do I need to edit my JavaScriptFunctionTemplate I notice in the XLabs they have a similar template but append something to the end

Is there any reason why you couldn't simply 're-call' your function using the methods described here?
Their example:
void OnCallJavaScriptButtonClicked (object sender, EventArgs e)
{
...
int number = int.Parse (numberEntry.Text);
int end = int.Parse (stopEntry.Text);
webView.Eval (string.Format ("printMultiplicationTable({0}, {1})", number, end));
}
So yours would be something like:
const string JavaScriptFunctionTemplate = "function {0}(){{window.webkit.messageHandlers.invokeAction.postMessage('{0}|' + JSON.stringify(arguments));}}";
public void DidReceiveScriptMessage(WKUserContentController userContentController, WKScriptMessage message)
{
var bits = message.Body.ToString().Split('|');
if (bits.Count() == 2)
{
var result = Element.InvokeFunction(bits[0], bits[1]);
webView.Eval(string.Format ("JavaScriptFunctionTemplate({0})", result)); // or however your parameter structure is.
}
}
EDIT:
Just want to encorporate the LINK that the OP found as it looks to be a solid guide to the solution in Objective-C which is fairly straight forward to convert to Xamarin C#.

Download File From MVC

I need a way to pass a list of strings when a user clicks an icon from angular/script and send it to an MVC controller in .NET. This list does what it needs to then is supposed to download a file in my browser. I have learned that I cannot do this via AJAX and/or it get pretty messy.
Edit: the list of strings refers to a list of file ids that I am retrieving, then zipping up into one file, which is to be downloaded. I do not want to store this zipped file anywhere permanently.
I am open to ideas!
$http.post('document/downloadfiles', data).success(function () {/*success callback*/ });
[HttpPost]
public ActionResult DownloadFiles(List<string> fileUniqueIdentifiers)
{
var file = _service.ArchiveAndDownloadDocuments(fileUniqueIdentifiers);
file.Position = 0;
return new FileStreamResult(file, "application/force-download");
}

Ok, third-time lucky I guess?
(I think this'll be my last implementation sorry Jim - you'll have to work the rest out for yourself, I think I've given you more than enough free pointers for now... if you want more you can contact me and I'll charge you to write it! :P).
This version uses a cookie-based interchange, accepts the input strings (assuming they are filenames) from the javascript, stores these in the instance class along with the token as key, then assembles the ZipFile in-memory (without writing to disk), and then returns the zipfile as a Content Result. For efficiency you could remove the actual token checks against the GUID list and just check against the key in the file list. Obviously you probably won't want the filenames hard-coded in that javascript as I've done, but you can work that part out for yourself.
Hint: Create a database table with identifier/filepath pairs and use the identifiers to lookup the individual file paths after the request is sent to the server...
View Part (I added mine to index.cshtml):
<script type="text/javascript">
function sendStringandGetFiles() {
var files = ['c:\\temp\\afile.txt', 'c:\\temp\\afile2.txt', 'c:\\temp\\afile3.txt'];
$.ajax({
type: "POST",
url: "/Home/GetFile",
contentType: 'application/json',
data: JSON.stringify(files),
success: function (result) {
//alert("Yes This worked! - " + result);
window.location = "/Home/GetFile";
}
});
}
</script>
<h5>Just something to click</h5>
<button onclick="sendStringandGetFiles()">Send String and Get Files</button>
Then Controller Part (I used HomeController.cs)
[AcceptVerbs(HttpVerbs.Post)]
public string GetFile(string[] strings)
{
Guid token = Guid.NewGuid();
InMemoryInstances instance = InMemoryInstances.Instance;
instance.addToken(token.ToString());
instance.addFiles(token.ToString(), strings);
HttpCookie cookie = new HttpCookie("CookieToken");
cookie.Value = token.ToString();
this.ControllerContext.HttpContext.Response.Cookies.Add(cookie);
return token.ToString();
}
[AcceptVerbs(HttpVerbs.Get)]
public ActionResult GetFile()
{
InMemoryInstances instance = InMemoryInstances.Instance;
if (this.ControllerContext.HttpContext.Request.Cookies.AllKeys.Contains("CookieToken"))
{
HttpCookie cookie = this.ControllerContext.HttpContext.Request.Cookies["CookieToken"];
if (instance.checkToken(cookie.Value))
{
cookie.Expires = DateTime.Now.AddDays(-1);
this.ControllerContext.HttpContext.Response.Cookies.Add(cookie);
MemoryStream ms = new MemoryStream();
string[] filenames = instance.getFiles(cookie.Value);
using (ZipArchive zs = new ZipArchive(ms,ZipArchiveMode.Create, true))
{
for (int i=0;i < filenames.Length; i++)
zs.CreateEntryFromFile(filenames[i], Path.GetFileName(filenames[i]));
}
FileContentResult resultContent = new FileContentResult(ms.ToArray(),"application/zip");
instance.removeFiles(cookie.Value);
resultContent.FileDownloadName = "ARandomlyGeneratedFileNameHere.zip";
return resultContent;
} else
{
return View("Index");
}
}
else
{
return View("Index");
}
}
InMemoryInstances Class:
public class InMemoryInstances
{
private static volatile InMemoryInstances instance;
private static object syncRoot = new Object();
private List<Guid> activeTokens;
private NameValueCollection filesByKeyCollection;
private InMemoryInstances()
{
activeTokens = new List<Guid>();
filesByKeyCollection = new NameValueCollection();
}
public static InMemoryInstances Instance
{
get
{
if (instance == null)
{
lock (syncRoot)
{
if (instance == null)
instance = new InMemoryInstances();
}
}
return instance;
}
}
public bool checkToken(string token)
{
return activeTokens.Contains(new Guid(token));
}
public string[] getFiles(string token)
{
return filesByKeyCollection.GetValues(token);
}
public bool addFiles(string token, string[] files)
{
for (int i = 0; i < files.Length; i++)
filesByKeyCollection.Add(token, files[i]);
return true;
}
public bool addToken(string token)
{
activeTokens.Add(new Guid(token));
return true;
}
public bool removeFiles(string token)
{
filesByKeyCollection.Remove(token);
return true;
}
public bool removeToken(string token)
{
return activeTokens.Remove(new Guid(token));
}
}
Hope this helps!

I normally wouldn't go to this length of effort to help, but I'm home sick and feel like writing some code, so here's an implementation of what I think you're asking for. Here I'm using token exchange to track the file interchange for a specific user storing the data in a singleton instance, you could use another method (e.g. database token storage) if you wanted...
View Part (I added mine to index.cshtml):
<script type="text/javascript">
function sendStringandGetFiles() {
var strings = ['One String', 'Two String', 'Three String'];
$.ajax({
type: "POST",
url: "/Home/GetFile",
contentType: 'application/json',
data: JSON.stringify(strings),
success: function (result) {
//alert("Yes This worked! - " + result);
window.location = "/Home/GetFile?token=" + result;
}
});
}
</script>
<h5>Just something to click</h5>
<button onclick="sendStringandGetFiles()">Send String and Get Files</button>
Then, Controller part (I used HomeController.cs):
[AcceptVerbs(HttpVerbs.Post)]
public string GetFile(string[] strings)
{
for (int i = 0; i < strings.Length; i++)
{
// Do some stuff with string array here.
}
Guid token = Guid.NewGuid();
InMemoryInstances instance = InMemoryInstances.Instance;
instance.addToken(token.ToString());
return token.ToString();
}
[AcceptVerbs(HttpVerbs.Get)]
public ActionResult GetFile(string token)
{
string filename = #"c:\temp\afile.txt";
InMemoryInstances instance = InMemoryInstances.Instance;
if (instance.checkToken(token))
{
instance.removeToken(token);
FileStreamResult resultStream = new FileStreamResult(new FileStream(filename, FileMode.Open, FileAccess.Read), "txt/plain");
resultStream.FileDownloadName = Path.GetFileName(filename);
return resultStream;
}
else
{
return View("Index");
}
}
InMemoryInstances Class:
public class InMemoryInstances
{
private static volatile InMemoryInstances instance;
private static object syncRoot = new Object();
private List<Guid> activeTokens;
private InMemoryInstances()
{
activeTokens = new List<Guid>();
}
public static InMemoryInstances Instance
{
get
{
if (instance == null)
{
lock (syncRoot)
{
if (instance == null)
instance = new InMemoryInstances();
}
}
return instance;
}
}
public bool checkToken(string token)
{
return activeTokens.Contains(new Guid(token));
}
public bool addToken(string token)
{
activeTokens.Add(new Guid(token));
return true;
}
public bool removeToken(string token)
{
return activeTokens.Remove(new Guid(token));
}
}
Hope this helps!

I also wrote yet another implementation which uses cookies to perform the same operation (incase you wanted to store the information client-side instead of using a query-string, yes, I'm slightly bored)...
View Part (I added mine to index.cshtml):
<script type="text/javascript">
function sendStringandGetFiles() {
var strings = ['One String', 'Two String', 'Three String'];
$.ajax({
type: "POST",
url: "/Home/GetFile",
contentType: 'application/json',
data: JSON.stringify(strings),
success: function (result) {
//alert("Yes This worked! - " + result);
window.location = "/Home/GetFile?token=" + result;
}
});
}
</script>
<h5>Just something to click</h5>
<button onclick="sendStringandGetFiles()">Send String and Get Files</button>
Then Controller Part (I used HomeController.cs)
[AcceptVerbs(HttpVerbs.Post)]
public string GetFile(string[] strings)
{
for (int i = 0; i < strings.Length; i++)
{
// Do some stuff with string array here.
}
Guid token = Guid.NewGuid();
InMemoryInstances instance = InMemoryInstances.Instance;
instance.addToken(token.ToString());
HttpCookie cookie = new HttpCookie("CookieToken");
cookie.Value = token.ToString();
this.ControllerContext.HttpContext.Response.Cookies.Add(cookie);
return token.ToString();
}
[AcceptVerbs(HttpVerbs.Get)]
public ActionResult GetFile()
{
string filename = #"c:\temp\afile.txt";
InMemoryInstances instance = InMemoryInstances.Instance;
if (this.ControllerContext.HttpContext.Request.Cookies.AllKeys.Contains("CookieToken"))
{
HttpCookie cookie = this.ControllerContext.HttpContext.Request.Cookies["CookieToken"];
if (instance.checkToken(cookie.Value))
{
cookie.Expires = DateTime.Now.AddDays(-1);
this.ControllerContext.HttpContext.Response.Cookies.Add(cookie);
FileStreamResult resultStream = new FileStreamResult(new FileStream(filename, FileMode.Open, FileAccess.Read), "txt/plain");
resultStream.FileDownloadName = Path.GetFileName(filename);
return resultStream;
} else
{
return View("Index");
}
}
else
{
return View("Index");
}
}
InMemoryInstances Class:
public class InMemoryInstances
{
private static volatile InMemoryInstances instance;
private static object syncRoot = new Object();
private List<Guid> activeTokens;
private InMemoryInstances()
{
activeTokens = new List<Guid>();
}
public static InMemoryInstances Instance
{
get
{
if (instance == null)
{
lock (syncRoot)
{
if (instance == null)
instance = new InMemoryInstances();
}
}
return instance;
}
}
public bool checkToken(string token)
{
return activeTokens.Contains(new Guid(token));
}
public bool addToken(string token)
{
activeTokens.Add(new Guid(token));
return true;
}
public bool removeToken(string token)
{
return activeTokens.Remove(new Guid(token));
}
}
Maybe that is better if you want to hide the token interchange from the browser address bar?

GWT Native Method Warning

I'm doing a project in GWT to deploy in AppEngine and I'm getting a warning in Eclipse saying:
JavaScript parsing: Expected an identifier in JSNI
reference
Any ideas on what's causing this?
public void callFacebookAPI(String url) {
JsonpRequestBuilder requestBuilder = new JsonpRequestBuilder();
requestBuilder.requestObject(url, new AsyncCallback<FbUser>() {
public void onFailure(Throwable caught) {
System.out.println("FAIL" );
}
#Override
public void onSuccess(FbUser result) {
facebookUser = result;
System.out.println("Facebook name:" + facebookUser.getName());
}
});
}
private final native void doFbLoginFunction() /*-{
FB.login(function(response) {
if (response.authResponse) {
// connected
//return response.session;
var accessToken = response.accessToken;
var url = "http://graph.facebook.com/me?access_token=";
var facebookUrl = url + accessToken;
#com.google.gwt.smartpark.client.map.SmartPark::callFacebookAPI(Ljava/lang/String;Ljava/lang/
String;)(facebookUrl);
} else {
// cancelled
}
});

callFacebookAPI is not static so there must be something before the # in the reference in JSNI, e.g.
var that = this;
$wnd.FB.login($entry(function(response) {
// ...
that.#com.google.gwt.smartpark.client.map.SmartPack::callFacebookAPI(Ljava/lang/String;)(facebookUrl);
// ...
}));
Also, your callFacebookAPI takes a single argument, so the JSNI signature should have a single Ljava/lang/String;.