How to retrieve host from string

Question

I have a request as a string (due to working on tcp level) and I would like to only get the host:

GET http://www.mrjacks.nl/ HTTP/1.1
cache - control: no - cache
Postman - Token: 037a5930 - 715d - 477d - a1d2 - d9445e6f675c
User - Agent: PostmanRuntime / 7.2.0
Accept: */*
Host: www.mrjacks.nl
accept-encoding: gzip, deflate
Connection: keep-alive

In this case I want to get "www.mrjacks.nl".

The programming languague I'm using is C#.

Does anyone have any idea on how to get this url? Through Regex or some other Class? I'm new to regex and I've tried messing around with it a little bit, but without success

`I've tried messing around with it a little bit` please share what you tried. We don't want to post solutions you already tried. — Renatas M., Mar 07 '19 at 10:23

score 0 · Answer 1 · answered Mar 07 '19 at 10:22

0

Please see :-

https://stackoverflow.com/a/14212007/385965

Depending on how you're building the HTTP request the URL might already be stored in a Uri class based property.

answered Mar 07 '19 at 10:22

PhilH

60
2
7

I'm in a rep no mans land where I can comment here but not on the original post apparently. – PhilH Mar 07 '19 at 11:15

score 0 · Accepted Answer · answered Mar 07 '19 at 13:20

Well it's not so hard to do some string manipulations. First thing to do is to search the line with "Host:" word and when you find it - remove the "Host: " word from that line. The leftover will be the address.

string s = @"GET http://www.mrjacks.nl/ HTTP/1.1
             cache - control: no - cache
             Postman - Token: 037a5930 - 715d - 477d - a1d2 - d9445e6f675c
             User - Agent: PostmanRuntime / 7.2.0
             Accept: */*
             Host: www.mrjacks.nl
             accept-encoding: gzip, deflate
             Connection: keep-alive";
var lines = s.Split('\n');
string result = "no result";
foreach(var line in lines)
{
    if(line.StartsWith("Host:"))
    {
        result = line.Replace("Host: ", "");
        break;
    }
}
Console.WriteLine(result);

@juser in ALL your questions don't forget to accept answers if they where useful . — Renatas M., Mar 07 '19 at 14:35

How to retrieve host from string

2 Answers2