Download How to Build an SMS Service by Retford B., Schwartz J. PDF

By Retford B., Schwartz J.

The straightforward textual content message program that looks on nearly all cellphones is the last word skinny customer, permitting your clients entry to the complete computing energy and informational intensity of the web from an inexpensive cellphone on a mountaintop. development an SMS carrier may be very easy. This instructional publications you thru various implementations, supplying you with the data you want to opt for one who most closely fits your targeted wishes and situations. greater than that, even though, it seeks that will help you comprehend the middle rules essential to make your carrier a hit.

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Sending our forecasts Now that we can get a forecast, and we know who wants forecasts for which locations, we need to write a script that will loop through our users, get their forecasts, and send them. sendsms(u[0], u[1], "Daily Forecast", forecast) 57 58 The first thing we do here is import the modules we need, including our own smsEmailSender, config, and get_forecast modules. Next we connect to our database and instantiate an SmsEmailSender. A cursor object is created and used to find all the users whose verified flag is set to True.

Cursor objects are transactions in Python's database API. We instantiate a new SmsEmailSender object because we'll be using it in a few lines. If the user is already registered, we want to let them know that and not reregister him, so we use our database connection to look for a user with the phone number that was passed onto us. If we get a result, we do one of two things: • If the user isn't verified yet, we resend his confirmation code (he may have lost it). • If the user is already verified, we inform him that he is in fact already registered and good to go.

Net), a few don't. com. This makes it difficult to keep track of who you're receiving messages from. You'll want to accommodate this in your service. For example, when you user registers, have them reply to the registration mail with a unique response code that will allow you to keep track of who is sending them message, then match that up with the address it's coming from. Figure 9-1. Email to SMS architecture 45 46 To allow the receiver to reply via SMS and have the email user receive the reply, the carriers will assign a temporary response code to the sender's email address, and then forward any SMS messages sent by that user to that response code back to the appropriate email address (see Figure 9-1).

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