How to extract scheme, host, path, and query string from the HTTP Referer using C# ASP.NET Core

Question

How can I extract the scheme, host, path, and query string from the HTTP Referer using C#?

I'm currently working on a simple ASP.NET Core MVC 6 application and getting the HTTP Referer using Context.Request.Headers["Referer"].ToString().The value of the HTTP referer is http://localhost:5050/Blogs/Details/3 and I'm wondering how I can extract http for the scheme, localhost:5050 for the host (including port), and /Blogs/Details/3 for the path.

Is there anything in ASP.NET Core framework or C# that can do this? Or do I need to manually separate the HTTP Referer string?

stackunderflow · Accepted Answer · 2017-02-05 11:30:33Z

4

if you save the referrer as a string say refURL = Context.Request.Headers["Referer"].ToString()

Then

var address = new System.Uri(refURL);

var scheme = address.Scheme ;
var host = address.Host;

etc

details on Uri Class

edited Feb 5, 2017 at 11:30

answered Feb 5, 2017 at 11:07

stackunderflow

3,8835 gold badges34 silver badges46 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

kimbaudi Over a year ago

Unfortunately, System.Uri(refURL) doesn't work for ASP.NET Core framework. I'm getting Non-invocable member 'Uri' cannot be used like a method error. I think your solution would work on ASP.NET 4.5 and 4.6, but not on Core.

stackunderflow Over a year ago

did you then try the UriBuilder(refURL)

kimbaudi Over a year ago

Ok you were right! Both System.Uri and System.UriBuilder work, but I had to create a new instance by using the new keyword (i.e., var address = new System.Uri(refURL);.

stackunderflow Over a year ago

Thank you I edited the answer with the new keyword added.. sorry for the confusion

kimbaudi Over a year ago

Thanks! I decided to use System.UriBuilder instead of System.Uri because it gave me Path. System.UriBuilder is simpler and exactly what I need. System.Uri has many more properties including AbsolutePath, LocalPath and PathAndQuery, which all have the same Path value, but it seems like overkill for what I'm trying to do.

Collectives™ on Stack Overflow

How to extract scheme, host, path, and query string from the HTTP Referer using C# ASP.NET Core

1 Answer 1

5 Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

5 Comments

Related