Ozeki Phone System XE VoIP PBX software is an advanced PBX built for automated voice calls and 2 way SMS messaging. It has outstanding APIs for software developers. It can be used for:

Phone calls from SQL
Phone calls from HTTP
Voice and SMS applications

#include<iostream>
#include<sstream>
#include<windows.h>
#include<wininet.h>

using namespace std;

string encode(string url);

int main(int argc, char** argv)
{
        // Ozeki NG SMS Gateway's host
        // and port.
        string host       = "localhost";
        int port          = 9502;

        // Username
        // and password.
        string username   = "admin";
        string password   = "abc123";

        // Message
        string message    = "Test message!";

        // Originator's phone number.
        string originator = "+001111111";

        // Recipient(s) phone number.
        //        If You want to send message to multiple recipients, separate them with coma.
        // (don't use space character!) Ex: "+002222222,+003333333,+004444444"
        string recipient  = "+002222222";

        // Preparing the HTTPRequest url
        stringstream url;
                url << "/api?action=sendmessage&username=" << encode(username);
                url << "&password=" << encode(password);
                url << "&recipient=" << encode(recipient);
                url << "&messagetype=SMS:TEXT&messagedata=" << encode(message);
                url << "&originator=" << encode(originator);
                url << "&responseformat=xml";

        // Create socket.
        HINTERNET inet = InternetOpen("Ozeki", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);

        // Open connection and bind it to the socket.
        HINTERNET conn = InternetConnect(inet, host.c_str() , port, NULL, NULL,
        INTERNET_SERVICE_HTTP, 0, 0);

        // Open the HTTP request
        HINTERNET sess = HttpOpenRequest(conn, "GET", url.str().c_str(), "HTTP/1.1",
        NULL, NULL, INTERNET_FLAG_PRAGMA_NOCACHE | INTERNET_FLAG_RELOAD, 0);

    // Check errors
        int error = GetLastError();
        if(error == NO_ERROR)
        {
                // Send HTTP request.
                HttpSendRequest(sess, NULL, 0, NULL,0);

                // Receive HTTP response.

                int size = 1024;
                char *buffer = new char[size + 1];
                DWORD read;
                int rsize = InternetReadFile(sess, (void *)buffer, size, &read);
                string s = buffer;
                s = s.substr(0, read);

                // Check statuscode
                int pos = s.find("<statuscode>0</statuscode>");

                // If statuscode is 0, write "Message sent." to output
                // else write "Error."
                if(pos > 0) cout << "Message sent." << endl;
                else cout << "Error." << endl;
        }

        system("pause");
}


// encoding converts characters that are not allowed in a URL into character-entity equivalent.
string encode(string url)
{
        char *hex = "0123456789abcdef";
        stringstream s;

        for(unsigned int i = 0; i < url.length(); i++)
        {
                byte c = (char)url.c_str()[i];
                if( ('a' <= c && c <= 'z')
                || ('A' <= c && c <= 'Z')
                || ('0' <= c && c <= '9') ){
                        s << c;
                } else {
                        if(c == ' ') s << "%20";
                        else
                        s << '%' << (hex[c >> 4]) << (hex[c & 15]);
                }
        }

        return s.str();
}

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