How to send SMS from TCL/TK using HTTP request
In this guide you will learn how to send SMS
messages from TCL using HTTP request with the help of Ozeki NG SMS Gateway.
You will also find a source code example and an application guide as well.
Introduction
The most simple but very effective method to forward data from
one application to another is HTTP. TCL is an ideal mean to send SMS messages
from the PC to mobile phones as it is able to calls to submit HTTP requests.
You can introduce SMS technology into your IT system if you download and install
a powerful SMS gateway such as Ozeki NG SMS Gateway. With this software product
you can operate with SMS messages with the use of HTTP GET or HTTP POST method
calls (Figure 1).
Figure 1 - How to send SMS messages from TCL through HTTP.
After you have installed the SMS gateway, SMS sending will
work as follows:
to be able to operate with SMS messages, you need to forward your messages
to the SMS Gateway. The built-in webserver of the gateway provides an
HTTP SMS API that allows to
submit messages. After the messages arrived at the SMS gateway they will be
forwarded to the mobile network either with a GSM modem attached to the
computer with a data cable, or the gateway directly connects to the SMS center
of the mobile service provider over the Internet.
Prerequisites
To setup and operate this solution properly you need the
follows:
Configuration
To send SMS messages from TCL using HTTP requests, first
you need to download, install and configure Ozeki
NG SMS Gateway software to your computer. Then import the source code
provided below into a new project you write in TCL. After you imported
it you can configure the code in the following way: In "host" variable replace
127.0.0.1. to the IP address on which Ozeki NG SMS Gateway has been installed.
(In our example it is on the local computer that is why its IP address is
127.0.0.1. Replace "user_name" and "user_password" to the values with which
you log into Ozeki NG SMS Gateway. Then replace the recipient to the intended
recipient. In the message body you can type your message. Next, the example will
piece together the HTTP request and then query it. Finally, it will verify
whether the SMS sending is successful. In case of success you will read:
"Message successfully sent", while if there was a problem the following message
appears: "Message not sent! Please check your settings". Please note that you
need to customize the values in the source code below.
Source code sample
Feel free to use and modify this source code sample!
#!/usr/bin/tclsh
package require http
###############################################
## Ozeki NG - SMS Gateway TCL example ##
###############################################
###############################################
## Functions for url - encoding ###
###############################################
proc init {} {
variable map
variable alphanumeric a-zA-Z0-9
for {set i 0} {$i <= 256} {incr i} {
set c [format %c $i]
if {![string match \[$alphanumeric\] $c]} {
set map($c) %[format %.2x $i]
}
}
array set map { " " + \n %0d%0a }
}
proc url-encode {string} {
variable map
variable alphanumeric
regsub -all \[^$alphanumeric\] $string {$map(&)} string
regsub -all {[][{})\\]\)} $string {\\&} string
return [subst -nocommand $string]
}
init
###############################################
### Ozeki NG informations ###
###############################################
set host "127.0.0.1"
set port "9501"
set username [url-encode "admin"]
set password [url-encode "abc123"]
set recipient [url-encode "+00123456"]
set message [url-encode "Test Message from Tcl"]
###############################################
### Putting together the final HTTP Request ###
###############################################
set url "http://$host:$port/api?action=sendmessage&username=$username
&password=$password&recipient=$recipient&messagetype=SMS:TEXT&messagedata=$message"
################################################
#### Sending the message ###
################################################
set http [::http::geturl $url]
################################################
### Verifying the response ###
################################################
upvar #0 $http state
if {$state(http) == "HTTP/1.1 200 OK"} {
puts "Message successfully sent\n"
} else {
puts "Message not sent! Please check your settings!\n"
}
exit
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