Introduction
So this week I wanted to setup a webservice that also included authentication. As one usually does this time of the year, Santa needs his data to be protected so that the children can’t see which gifts they will receive.
I decided to help Santa by using ServiceStack and Easyhttp. And I described the servicestack in the first part of this post.
Easyhttp
First of all we need an httpclient.
```vbnet Private http As HttpClient
Private Sub InitializeClient()
If http Is Nothing Then
http = New HttpClient()
http.Request.Accept = HttpContentTypes.ApplicationJson
End If
End Sub```
Then we need a way to read our data. I wrote a DoGet method for this.
vbnet
Private Function DoGet(ByVal url As String, ByVal parameters As Object) As Object
Dim response As HttpResponse = Nothing
If parameters IsNot Nothing Then
response = http.Get(url, parameters)
Else
response = http.Get(url)
End If
If response.StatusCode = Net.HttpStatusCode.Unauthorized Then
Console.WriteLine("Unauthorized")
response = Nothing
End If
If response IsNot Nothing Then
Return response.DynamicBody
Else
Return Nothing
End If
End Function
Here I catch the httpStatuscode that tells me I’m unauthorized. So I can tell Santa to log in.
Now I just need a Login method.
vbnet
Private Sub Authorize()
Dim response = http.Post("http://localhost:58241/auth", New With {.UserName = "cbaes", .Password = "test1"}, HttpContentTypes.ApplicationJson)
http.Request.Cookies = response.Cookie
Console.WriteLine(response.DynamicBody.SessionId)
Console.WriteLine(response.DynamicBody.UserName)
Console.WriteLine("")
End Sub
Easy right. But watch out for the cookiemonster. I had to tell request to get the cookies from the response otherwise this won’t work. But Hadi promised to fix this next week.
One more method is for printing our results.
vbnet
Private Sub PrintChild(ByVal children As Object)
If children IsNot Nothing Then
For Each child In children
If child.Good = False Then
Console.ForegroundColor = ConsoleColor.Red
Else
Console.ForegroundColor = ConsoleColor.Green
End If
Console.WriteLine(child.LastName)
Next
End If
Console.ForegroundColor = ConsoleColor.White
End Sub
Lastly I also want to logout.
vbnet
Private Sub LogOut()
Dim response = http.Get("http://localhost:58241/auth/logout")
http.Request.Cookies = response.Cookie
End Sub
I used a get for that, not sure that is the right way to do that, but it works.
And last but not least we put it all together.
vbnet
Sub Main()
Dim response As HttpResponse
InitializeClient()
PrintChild(DoGet("http://localhost:58241/GoodOrBad", Nothing))
Console.WriteLine("")
Authorize()
PrintChild(DoGet("http://localhost:58241/GoodOrBad", Nothing))
Console.WriteLine("")
LogOut()
PrintChild(DoGet("http://localhost:58241/GoodOrBad", Nothing))
Console.WriteLine("")
Console.ReadLine()
End Sub
And here is the result.
Conclusion
Doing a get to do a log is a bit illogical but I’m probably doing it wrong. For the rest it was pretty painless.
And I seem to be a man of little words but lots of code. Oh well, there is worse things in this world.
In post 3 we will learn more about the use of roles.
Chris is awesome.
