Visual Basic code samples for integration with the LabsMobile SMS API

Below are the examples of programming code in Visual Basic language to send SMS messages through the LabsMobile platform API.

This documentation is designed for you to connect your applications with the LabsMobile platform and automate the sending of SMS messages. The main objective of the integration of these applications is the sending of SMS messages and related communications.

Advice We recommend using our API SMS http/POST in JSON format for any integration with the LabsMobile platform. But we have other API versions that you can use depending on your environment and requirements.

With these examples you will be able to perform the integration of the following functionalities:

Send SMS messages individually or in bulk.
Check your account balance.
Receive delivery confirmation and/or error notifications corresponding to the messages sent.
Obtain notification and data of the messages received in the virtual numbers contracted.

To be taken into account

The LabsMobile API SMS uses a common base URL for all requests: https://api.labsmobile.com.

It is highly recommended to use a URL that includes the HTTPS protocol in any version of the API.

Authentication is done with the username and an API token, myUsername:myToken. You must create the API token from the API Settings section of your account.

Send SMS with http/POST

Here is an example of code in Visual Basic language to send SMS messages using the API SMS http/POST that uses the JSON format for the information exchange variables.

As you can see, you need to create a structure in JSON format containing all the necessary parameters for sending and make a HTTP/POST call with this data in the body of the request.

Imports System
Imports System.Net.Http
Imports System.Text

Module Program
   Sub Main()
       Dim userToken As String = "myUsername:myToken"
       Dim credentials As String = Convert.ToBase64String(Encoding.UTF8.GetBytes(userToken))

       Dim client As New HttpClient()
       Dim mediaType As String = "application/json"
       Dim jsonBody As String = "{
             ""message"":""Your verification code is 123"",
             ""tpoa"":""Sender"",
             ""recipient"":[
               {
                 ""msisdn"":""12015550123""
               }
             ]
           }"

       Dim content As New StringContent(jsonBody, Encoding.UTF8, mediaType)

       client.DefaultRequestHeaders.Add("Authorization", "Basic " & credentials)

       Dim request As New HttpRequestMessage(HttpMethod.Post, "https://api.labsmobile.com/json/send")
       request.Content = content

       Dim response As HttpResponseMessage = client.SendAsync(request).Result

       Dim responseContent As String = response.Content.ReadAsStringAsync().Result
       Console.WriteLine(responseContent)
   End Sub
End Module

Imports System
Imports System.Net.Http
Imports System.Text

Module Program
   Sub Main()
       Dim userToken As String = "myUsername:myToken"
       Dim credentials As String = Convert.ToBase64String(Encoding.UTF8.GetBytes(userToken))

       Dim client As New HttpClient()
       Dim mediaType As String = "application/json"
       Dim jsonBody As String = "{
             ""message"":""Your verification code is 123"",
             ""tpoa"":""Sender"",
             ""recipient"":[
               {
                 ""msisdn"":""12015550123""
               },
               {
                 ""msisdn"":""12015550124""
               },
               {
                 ""msisdn"":""12015550125""
               }
             ]
           }"

       Dim content As New StringContent(jsonBody, Encoding.UTF8, mediaType)

       client.DefaultRequestHeaders.Add("Authorization", "Basic " & credentials)

       Dim request As New HttpRequestMessage(HttpMethod.Post, "https://api.labsmobile.com/json/send")
       request.Content = content

       Dim response As HttpResponseMessage = client.SendAsync(request).Result

       Dim responseContent As String = response.Content.ReadAsStringAsync().Result
       Console.WriteLine(responseContent)
   End Sub
End Module

{
  "subid": "65f33a88ceb3d",
  "code": "0",
  "message": "Message has been successfully sent."
}

{
  "subid": "65f7f7041385d",
  "code": "35",
  "message": "The account has no enough credit for this sending"
}

All error codes can be found in API documentation, error codes.

For more details on the available parameters and configuration options, see the official documentation at:

SMS http/POST API Documentation

Send SMS with http/GET

This is an example of code in Visual Basic language to send SMS messages using the SMS API http/GET.

As you can see, you must pass a series of GET variables in the same URL and make a HTTP call. It is important to encode all values as URL using the Uri.EscapeDataString() function.

Important The SMS http/GET API transmits credentials (username and API token) unencrypted and unsecured. We recommend using this API GET only when absolutely essential and use the API SMS http/POST instead.

Imports System
Imports System.Net.Http

Module Program
   Sub Main()
       Dim client As New HttpClient()

        Dim username As String = "my@Username"
        Dim token As String = "myToken"
        Dim msisdn As String = "12015550123"
        Dim message As String = "Your verification code is 123"

        Dim encodedUsername As String = Uri.EscapeDataString(username)
        Dim encodedToken As String = Uri.EscapeDataString(token)
        Dim encodedMsisdn As String = Uri.EscapeDataString(msisdn)
        Dim encodedMessage As String = Uri.EscapeDataString(message)

        Dim url As String = $"https://api.labsmobile.com/get/send.php?username={encodedUsername}&password={encodedToken}&msisdn={encodedMsisdn}&message={encodedMessage}"

       Dim response As HttpResponseMessage = client.GetAsync(url).Result

       Dim responseContent As String = response.Content.ReadAsStringAsync().Result
       Console.WriteLine(responseContent)
   End Sub
End Module

Imports System
Imports System.Net.Http

Module Program
   Sub Main()
       Dim client As New HttpClient()

       Dim username As String = "myUsername"
       Dim token As String = "myToken"
       Dim msisdn As String = "[12015550123,12015550124,12015550125]"
       Dim message As String = "Don't miss our Sale! Use code XXXX123 for 20% off."

       Dim encodedUsername As String = Uri.EscapeDataString(username)
       Dim encodedToken As String = Uri.EscapeDataString(token)
       Dim encodedMsisdn As String = Uri.EscapeDataString(msisdn)
       Dim encodedMessage As String = Uri.EscapeDataString(message)

       Dim url As String = $"https://api.labsmobile.com/get/send.php?username={encodedUsername}&password={encodedToken}&msisdn={encodedMsisdn}&message={encodedMessage}"

       Dim response As HttpResponseMessage = client.GetAsync(url).Result

       Dim responseContent As String = response.Content.ReadAsStringAsync().Result
       Console.WriteLine(responseContent)
   End Sub
End Module

{
  "subid": "65f33a88ceb3d",
  "code": "0",
  "message": "Message has been successfully sent."
}

{
  "subid": "65f7f7041385d",
  "code": "35",
  "message": "The account has no enough credit for this sending"
}

All error codes can be found in API documentation, error codes.

For more details on the available parameters and configuration options, see the official documentation at:

SMS http/GET API Documentation

Account balance inquiry

With this code example in Visual Basic you can consult your account balance using the LabsMobile API SMS.

Through a call to this endpoint, you can get information about the amount of credits available in your LabsMobile account. The connection is established through a HTTP/GET request with authentication in the HTTP connection header.

Imports System
Imports System.Net.Http
Imports System.Text

Module Program
   Sub Main()
       Dim userToken As String = "myUsername:myToken"
       Dim credentials As String = Convert.ToBase64String(Encoding.UTF8.GetBytes(userToken))

       Dim client As New HttpClient()


       client.DefaultRequestHeaders.Add("Authorization", "Basic " & credentials)

       Dim request As New HttpRequestMessage(HttpMethod.Get, "https://api.labsmobile.com/json/balance")

       Dim response As HttpResponseMessage = client.SendAsync(request).Result

       Dim responseContent As String = response.Content.ReadAsStringAsync().Result
       Console.WriteLine(responseContent)
   End Sub
End Module

{"code":0,"credits":"10"}

See the complete documentation at:

Documentation Balance inquiry

Receive status of sent messages

This example script receives a call from the LabsMobile platform when a sent SMS message changes status. To implement this solution, it is essential to configure the appropriate parameters, the confirmation URL in the ackurl parameter in the request or the default URL in the API Settings of your account.

Therefore, it is necessary to publish a script like this in your system so that our platform calls the URL when a status change occurs in any of the sent messages.

The example code obtains the URL parameters using the global $_GET variable and then assigns these parameters to local variables.

Imports System
Imports System.Collections.Specialized
Imports System.Web
Imports System.Net

Module Program
   Sub Main(args As String())
       MainRecieveMessageStatus(args)
   End Sub

   Async Sub MainRecieveMessageStatus(args As String())
       Dim port As Integer = 3000
       Dim listener As New HttpListener()
       listener.Prefixes.Add($"http://+:{port}/")
       listener.Start()
       Console.WriteLine($"The server is running on port {port}")

       While True
           Dim context = Await listener.GetContextAsync()
           Dim request = context.Request
           Dim response = context.Response

           Dim queryParams As NameValueCollection = If(request?.Url IsNot Nothing, HttpUtility.ParseQueryString(request.Url.Query), New NameValueCollection())
           Dim acklevel As String = If(queryParams.Get("acklevel"), "default_value")
           Dim credits As String = If(queryParams.Get("credits"), "default_value")
           Dim msisdn As String = If(queryParams.Get("msisdn"), "default_value")
           Dim status As String = If(queryParams.Get("message"), "default_value")
           Dim subid As String = If(queryParams.Get("subid"), "default_value")
           Dim timestamp As String = If(queryParams.Get("timestamp"), "default_value")

           Console.WriteLine($"Variable acklevel: {acklevel}")
           Console.WriteLine($"Variable credits: {credits}")
           Console.WriteLine($"Variable msisdn: {msisdn}")
           Console.WriteLine($"Variable status: {status}")
           Console.WriteLine($"Variable subid: {subid}")
           Console.WriteLine($"Variable timestamp: {timestamp}")

           Dim responseString As String = "200 OK"
           Dim buffer As Byte() = System.Text.Encoding.UTF8.GetBytes(responseString)

           response.ContentType = "text/plain"
           response.ContentLength64 = buffer.Length
           Await response.OutputStream.WriteAsync(buffer, 0, buffer.Length)
           response.Close()
       End While
   End Sub
End Module

See the complete documentation at:

Documentation Receipt of sent SMS statuses

Receiving SMS messages

Once you have contracted a virtual number, you will be able to receive messages via API on a specific URL via a HTTP/GET call to a script in your system. Each message received will invoke the URL, transmitting all its data in variables in JSON format.

To activate this functionality you must inform the URL for receiving messages in the Settings of your account.

It is necessary to configure an endpoint in your system so that the LabsMobile platform calls this script when an SMS is received on any of the contracted virtual numbers.

The example code obtains the URL parameters using the global variable $_GET and then assigns these parameters to local variables.

Imports System
Imports System.Collections.Specialized
Imports System.Web
Imports System.Net

Module Program
   Sub Main(args As String())
       MainRecieveMessageStatus(args)
   End Sub

   Async Sub MainRecieveMessageStatus(args As String())
       Dim port As Integer = 3000
       Dim listener As New HttpListener()
       listener.Prefixes.Add($"http://+:{port}/")
       listener.Start()
       Console.WriteLine($"The server is running on port {port}")

       While True
           Dim context = Await listener.GetContextAsync()
           Dim request = context.Request
           Dim response = context.Response

           Dim queryParams As NameValueCollection = If(request?.Url IsNot Nothing, HttpUtility.ParseQueryString(request.Url.Query), New NameValueCollection())
           Dim inbound_number As String = If(queryParams.Get("inbound_number"), "default_value")
           Dim service_number As String = If(queryParams.Get("service_number"), "default_value")
           Dim msisdn As String = If(queryParams.Get("msisdn"), "default_value")
           Dim message As String = If(queryParams.Get("message"), "default_value")
           Dim timestamp As String = If(queryParams.Get("timestamp"), "default_value")

           Console.WriteLine($"Variable inbound_number: {inbound_number}")
           Console.WriteLine($"Variable service_number: {service_number}")
           Console.WriteLine($"Variable msisdn: {msisdn}")
           Console.WriteLine($"Variable message: {message}")
           Console.WriteLine($"Variable timestamp: {timestamp}")

           Dim responseString As String = "200 OK"
           Dim buffer As Byte() = System.Text.Encoding.UTF8.GetBytes(responseString)

           response.ContentType = "text/plain"
           response.ContentLength64 = buffer.Length
           Await response.OutputStream.WriteAsync(buffer, 0, buffer.Length)
           response.Close()
       End While
   End Sub
End Module

See the complete documentation at:

Documentation Receipt of SMS messages

Support resources

We recommend that you consult and take into account the following support resources in your integration: