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Teknik/Utilities/Routing/UrlExtensions.cs

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using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Routing;
using System;
using System.Linq;
using System.Text.RegularExpressions;
using System.Web;
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using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.AspNetCore.Routing;
using Newtonsoft.Json.Linq;
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namespace Teknik.Utilities.Routing
{
public static class UrlExtensions
{
public static string SubRouteUrl(this IUrlHelper url, string sub, string routeName)
{
return url.SubRouteUrl(sub, routeName, null, string.Empty);
}
public static string SubRouteUrl(this IUrlHelper url, string sub, string routeName, string hostOverride)
{
return url.SubRouteUrl(sub, routeName, null, hostOverride);
}
public static string SubRouteUrl(this IUrlHelper url, string sub, string routeName, object routeValues)
{
return url.SubRouteUrl(sub, routeName, routeValues, string.Empty);
}
/// <summary>
/// Generates a full URL given the specified sub domain and route name
/// </summary>
/// <param name="url"></param>
/// <param name="sub"></param>
/// <param name="routeName"></param>
/// <param name="routeValues"></param>
/// <returns></returns>
public static string SubRouteUrl(this IUrlHelper url, string sub, string routeName, object routeValues, string hostOverride)
{
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var linkGen = url.ActionContext.HttpContext.RequestServices.GetService<LinkGenerator>();
var env = url.ActionContext.HttpContext.RequestServices.GetService<IWebHostEnvironment>();
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string host = url.ActionContext.HttpContext.Request.Host.Value;
string domain = host;
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// Generate a new domain if we aren't in development
if (!env.IsEnvironment(Environments.Development) &&
!string.IsNullOrEmpty(sub))
{
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domain = sub + "." + domain.GetDomain();
}
string fullHost = string.Format("{0}://{1}", url.ActionContext.HttpContext.Request.Scheme, domain);
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var routeValueDict = new RouteValueDictionary(routeValues);
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// Get the endpoint mapping
var mapping = EndpointHelper.GetEndpointMapping(routeName);
if (mapping != null)
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{
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routeValueDict.TryAdd("area", mapping.Area);
if (mapping.Defaults != null)
{
var defaults = mapping.Defaults as JObject;
foreach (var defaultVal in defaults)
{
routeValueDict.TryAdd(defaultVal.Key, defaultVal.Value.ToObject<object>());
}
}
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}
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var path = linkGen.GetPathByAddress(url.ActionContext.HttpContext, routeName, routeValueDict);
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return $"{fullHost}{path}";
}
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public static string GetUrlParameters(this string url)
{
Uri uri = new Uri(url);
var queryParts = HttpUtility.ParseQueryString(uri.Query);
return queryParts.ToString();
}
public static string SetUrlParameter(this string url, string paramName, string value)
{
return new Uri(url).SetParameter(paramName, value).ToString();
}
public static Uri SetParameter(this Uri url, string paramName, string value)
{
var queryParts = HttpUtility.ParseQueryString(url.Query);
queryParts[paramName] = value;
return new Uri(url.AbsoluteUriExcludingQuery() + '?' + queryParts.ToString());
}
public static string AbsoluteUriExcludingQuery(this Uri url)
{
return url.AbsoluteUri.Split('?').FirstOrDefault() ?? String.Empty;
}
public static string GetSubdomain(this string host)
{
if (host.IndexOf(":") >= 0)
host = host.Substring(0, host.IndexOf(":"));
Regex tldRegex = new Regex(@"\.[a-z]{2,3}\.[a-z]{2}$");
host = tldRegex.Replace(host, "");
tldRegex = new Regex(@"\.[a-z]{2,4}$");
host = tldRegex.Replace(host, "");
if (host.Split('.').Length > 1)
return host.Substring(0, host.IndexOf("."));
else
return string.Empty;
}
public static string GetSubdomain(this IUrlHelper url)
{
string host = url.ActionContext.HttpContext.Request.Host.Value;
// Grab the sub from parameters if it exists
string subParam = url.ActionContext.HttpContext.Request.Query["sub"]; // A subdomain specified as a query parameter takes precedence over the hostname unless on dev
if (string.IsNullOrEmpty(subParam))
{
// If we are on dev and no subparam, we need to set the subparam to the specified sub
subParam = host.GetSubdomain();
}
return subParam;
}
public static string GetDomain(this string host)
{
string domain = host;
var split = host.Split('.'); // split the host by '.'
if (split.Count() > 2)
{
int index = host.IndexOf('.') + 1;
if (index >= 0 && index < host.Length)
domain = host.Substring(index, (host.Length - index));
}
return domain;
}
public static string GetDomain(this Uri uri)
{
string domain = uri.Host;
var split = uri.Host.Split('.'); // split the host by '.'
if (split.Count() > 2)
{
int index = uri.Host.IndexOf('.') + 1;
if (index >= 0 && index < uri.Host.Length)
domain = uri.Host.Substring(index, (uri.Host.Length - index));
}
return domain;
}
public static string GetActive(this IUrlHelper url, params string[] subs)
{
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return url.GetActive(null, null, subs);
}
public static string GetActive(this IUrlHelper url, string controller)
{
return url.GetActive(controller, null);
}
public static string GetActive(this IUrlHelper url, string controller, string action, params string[] subs)
{
var curSub = url.GetSubdomain();
var curController = url.ActionContext.RouteData.Values["Controller"]?.ToString();
var curAction = url.ActionContext.RouteData.Values["Action"]?.ToString();
foreach (string sub in subs)
{
if (curSub == sub)
{
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if ((string.IsNullOrEmpty(controller) || curController == controller) &&
(string.IsNullOrEmpty(action) || curAction == action))
return "active";
}
}
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if (!subs.Any() &&
(string.IsNullOrEmpty(controller) || curController == controller) &&
(string.IsNullOrEmpty(action) || curAction == action))
{
return "active";
}
return string.Empty;
}
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public static bool IsValidUrl(this string url)
{
Uri uriResult;
bool result = Uri.TryCreate(url, UriKind.Absolute, out uriResult);
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if (result)
{
result = uriResult.IsWellFormedOriginalString();
}
return result;
}
public static string FullURL(this IUrlHelper helper, string virtualPath)
{
var url = string.Format("{0}://{1}{2}", helper.ActionContext.HttpContext.Request.Scheme, helper.ActionContext.HttpContext.Request.Host.ToUriComponent(), helper.Content(virtualPath));
return url;
}
}
}