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How to prevent users to add entries for a given time using ASP NET MVC? [closed]

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I have this scenario:
Add a product but block adding for 1 minute for other users. After 1 min they can normally add one.
Adding a product it is not blocked for the user itself who added it
but for others.
I have this and it is working like a charm:
public async Task<JsonResult> AddProducts(string citaId, string paciente, string medico, string modalidad)
{
var usuario = System.Web.HttpContext.Current.User.Identity.GetUserName();
if (Session["User"] != null)
{
if(Session["User"].ToString() != usuario)
{
var med = await _context.MEDICOS.FindAsync(medico);
var objetoerrr1 = new
{
type = "error",
message = $"you cannot add a product, WAIT 1 MIN."
};
return Json(objetoerrr1, JsonRequestBehavior.AllowGet);
}
}
... the rest of the code for adding a product
// create a session
Session["User"] = usuario;
Session.Timeout = 1;
But my problem is that it is not working when using different browsers or PCs and It is like session is empty in different devices.
Well I have never worked with sessions in ASP NET MVC5 before so when I heard this requeriment, sessions came to my mind so I used them.
How can I achieve such thing? Should I use database to store the session or something? Or should not I be using sessions for this approach?

You should save the sessions into database, not only for this, also for security reasons. And give that session an unique identifier (and save it inside the cookie and retrieve and check it everytime) in order to know login timestamp, logout timestamp, prevent cookie-copy between browsers, prevent cookie-copy after log out, prevent browser-copy, duplicated sessions, if roles changes meanwhile the user is logged in, etc.
Of course there are a lot of ways to do this without database, but this is my answer. I use only database for this because I save user logins into database, as their roles.

Service did not receive API Data through WebClient [closed]

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I am trying to send data from API to web service. But it is always receiving null
Code in API - WEB CLIENT:
using (var webClient = new WebClient())
{
webClient.Headers[HttpRequestHeader.ContentType] = "application/json";
var url = string.Format("End Point URL /SomeAction");
var user= new User()
{
...
};
var data = JsonConvert.SerializeObject(user);
webClient.UploadString(url, data);
}
Service:
public ActionResult SomeAction([System.Web.Http.FromBody]string data)
{
JavaScriptSerializer json_serializer = new JavaScriptSerializer();
FOUsers dataFromXBO =
(FOUsers)json_serializer.DeserializeObject(data);
//statements
}
Please advice, How can i receive data that passed from API

To answer your question directly, to extract a string from a request body, wrap your "string" in another object as per this SO link. ie.
class UserPostRequest{
public string UserJson{get; set;}
}
And change the signature in your controller as follows:
public ActionResult SomeAction([System.Web.Http.FromBody]UserPostRequest data)
With that said, in this specific instance it's likely that you can just do:
public ActionResult SomeAction([System.Web.Http.FromBody]FOUsers data)
and let the API take care of deserialization for you.
EDIT:
After further research, to add completeness to the first half of my answer let me acknowledge that there are many ways to skin that particular cat. The answer provided is just the one I've historically used. Here's another SO post that enumerates other solutions, including accepting a dynamic or HttpRequestMessage in your API method signature. These would be particularly helpful if for some reason you didn't want to change your client code. That said, again, I don't see a particular reason to do manual serialization if you're just going to end up consuming the out-of-the-box functionality.

How can I avoid boilerplate code to validate JWT Token in ASP.NET Web API 2? [closed]

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All my REST API methods start with that code as follows:
[HttpPost]
[Route("Login")]
public async Task<IHttpActionResult> Login(QueryModel q)
{
// get JWT Token string form HTTP Header
string token = Request.Headers.GetValues("Authorization").FirstOrDefault();
// decode token
string json = Jose.JWT.Decode(token, JWTModel.secretForAccessToken);
JWTModel jwt = JsonConvert.DeserializeObject<JWTModel>(json);
// check if issued from my homepage.
if (!jwt.iss.Equals("my-home-page.com"))
{
return Content(
HttpStatusCode.Unauthorized,
"access token is not from here"
);
}
// check if it has valid about time
long now = (long)DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1)).TotalSeconds;
if (jwt.iat > now || jwt.exp < now)
{
// request refresh token
return Content(
HttpStatusCode.Unauthorized,
"outdated access token"
);
}
/* ... */
}
How ridiculous and redundant are they!
Can I simplify and modulize them? And How?
(In Node.js, I can solve it by using so called middleware.)

I would suggest you look at DelegatingHandler or if you are running an OWIN based application then you can create Middleware
DelegatingHandler MSDN Link
OWIN Middleware MSDN

Suggest Me Best Local Storage Option [closed]

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I created a web api using C# and also created a mobile application using cordova.
I am retrieving all data on cordova app using JSON.
Now I want to save this JSON data to client side. Please suggest me the best option to save all the data to client side.
SQLLite
websql
JSON file directly saved to client side or other option.

If you need to keep your client-side and server-side DBs in sync, PouchDB is a good choice - you can use pouchdb-phonegap-cordova to implement it in the app. You'd also need implement a CouchDB REST interface on the server-side.
Or since your data is already formatted as JSON, you may want to try cordova-sqlite-porter as a convenient way to store the data - it will interface with either the WebView's WebSQL DB or native SQLite in conjunction with Cordova-sqlite-storage plugin.
You can pass your data as a JSON structure to importJsonToDb() which makes optimisations to perform the operation as fast as possible. This is good if you have a large amount of data to insert. Example usage:
var db = window.openDatabase("Test", "1.0", "TestDB", 1 * 1024);
var json = {
"structure":{
"tables":{
"Artist":"([Id] PRIMARY KEY, [Title])"
},
"otherSQL": [
"CREATE UNIQUE INDEX Artist_ID ON Artist(Id)"
]
},
"data":{
"inserts":{
"Artist":[
{"Id":"1","Title":"Fred"},
{"Id":"2","Title":"Bob"},
{"Id":"3","Title":"Jack"},
{"Id":"4","Title":"John"}
]
}
}
};
var successFn = function(count){
alert("Successfully imported JSON to DB; equivalent to "+count+" SQL statements");
};
var errorFn = function(error){
alert("The following error occurred: "+error.message);
};
var progressFn = function(current, total){
console.log("Imported "+current+"/"+total+" statements";
};
cordova.plugins.sqlitePorter.importJsonToDb(db, json, {
successFn: successFn,
errorFn: errorFn,
progressFn: progressFn,
batchInsertSize: 500
});

You can use pouchdb no SQL database here, also you can use cordova sqlite plugin here.

Connect to Stack Overflow API [closed]

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I am trying to connect to the Stack Overflow API as one of my first api calls, but I am struggling.
Can someone tell me why this code does not return a success code?
using (var handler = new HttpClientHandler())
using (var client = new HttpClient(handler))
{
client.BaseAddress = new Uri("https://api.stackexchange.com/");
var response = await client.GetAsync("questions");
if (response.IsSuccessStatusCode)
{
}
else
{
Console.WriteLine(response.ToString());
}
}

The response tells you site is required. Hit https://api.stackexchange.com/questions?site=stackoverflow instead.

You're getting back
{"error_id":400,"error_message":"site is required","error_name":"bad_parameter"}
If you read the error and documentation, it needs to know which StackExchange site you want. Try:
https://api.stackexchange.com/questions?site=stackoverflow