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HomeController

The HomeController is the main controller responsible for handling profile routing, language switching, and error pages. Namespace: dev_showcase.Controllers Base Class: Microsoft.AspNetCore.Mvc.Controller

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Profile Action

Handles profile page requests for different developer profiles. 
public IActionResult Profile(string profile)
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profile
string
required
The profile identifier. Must be one of the valid profile values.

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Valid Profile Values

The controller validates profile names against a case-insensitive whitelist:
  • dataScience - Data Science profile
  • webDev - Web Development profile
  • dataAnalyst - Data Analyst profile
  • DataAnalysis - Data Analysis profile

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Returns

  • IActionResult: Returns View("HomePage") with the profile set in ViewData["Profile"] if valid
  • NotFoundResult: Returns 404 if the profile is not in the valid profiles list

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Route Mapping

This action is mapped through two route patterns defined in Program.cs:
  1. With Language: /{lang}/{profile} - e.g., /en/dataScience
  2. Without Language: /{profile} - e.g., /dataScience
Both routes include constraints to ensure valid profile values.

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SetLanguage Action

Sets the user’s language preference via a cookie. 
[HttpPost]
public IActionResult SetLanguage(string lang)
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lang
string
The language code to set. Defaults to “es” if not provided or null.
The method sets a cookie named lang with the following options:
  • Expires: 1 year from the current UTC time
  • IsEssential: true - cookie is essential for the application to function
  • Default Value: “es” (Spanish) if lang is null or not provided

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Returns

  • OkResult: Returns HTTP 200 status code

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HTTP Method

POST - This endpoint only accepts POST requests

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Error Action

Displays the error page with diagnostic information. 
[ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
public IActionResult Error()

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Response Caching

The error action is decorated with caching attributes to prevent caching:
  • Duration: 0 seconds
  • Location: ResponseCacheLocation.None
  • NoStore: true

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Returns

  • ViewResult: Returns the Error view with an ErrorViewModel instance
  • The RequestId is populated with either:
    • Activity.Current?.Id if available
    • HttpContext.TraceIdentifier as fallback

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Route

In production environments, this is configured as the exception handler route: /Home/Error

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