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Mobile Web Development phần 8

Hầu như tất cả các hình nền và các nhà cung cấp nhạc chuông đang chạy trên Premium thanh toán dựa trên tin nhắn SMS. Ngay cả các phiếu bỏ bằng cách sử dụng tin nhắn SMS trên một cuộc thi truyền hình được tính cao hơn bình thường. Hình dưới đây minh họa làm thế nào các tin nhắn SMS có thể được sử dụng để đặt hàng. | Making Money via Mobile Devices Using SMS in Mobile Payment Almost all the wallpaper and ringtone providers are running on Premium SMS-based payments. Even the votes we cast using SMS on a television contest are charged higher than normal. The following figure illustrates how SMS can be used to place an order. There are a few important aspects of this flow. POTR will advertise pizzas in newspapers television or any other media. Along with product information we will also put up a code. To order the customer has to send a message to a special number called the Short Code with a message in a specific format. The Short Code may be shared by many service providers and hence the message may contain a keyword that will determine that it s meant for POTR. Along with the keyword it will also have order information. The item code and quantity in our case. The network operator will deliver the message to the SMS Gateway or Short Code Service Provider. The SMS Gateway will make an HTTP GET POST request to POTR and pass on the entire message along with the sender information. POTR can now process the order the way it wants. In our case Luigi ll call back and confirm the order and take the address of the customer 150 Chapter 8 The customer is charged a premium fee for sending the message. POTR gets charged for SMS Gateway services and short code provisioning. POTR also takes care of order fulfillment. The customer will get a hot pizza in the next half an hour Let s look closer at two components of this flow Receiving Messages and Short Codes. Receiving Text Messages We have seen how we can send messages using an SMS Gateway in Chapter 6. The process is as simple as making an HTTP request to the gateway-provided URL with certain parameters. But when we want to receive text messages the job gets a little complicated. To receive messages we need a number that people can send messages to and then a system that will receive and read messages sent to that number. The final step in .