Golang implements taxi hailing

As urbanization continues to accelerate and people’s requirements for travel methods continue to increase, taxi-hailing software has become an important part of modern urban transportation. Implementing a taxi-hailing software similar to Uber is a project that many programmers are interested in. This article will introduce how to use Golang to write a simple taxi-hailing software.

1. Project Overview

The basic function of this taxi-hailing software is: users can select the starting point, destination and desired car model on the mobile phone, and the system will match the appropriate vehicle according to the user’s needs. The driver completes the order. With this basic function, we can gradually expand more functions, such as communication between drivers and passengers, display of real-time traffic conditions, etc. However, this article will focus on the implementation of the most basic functions.

2. Technology Selection

In order to realize this project, we chose the following technologies:

• Golang: In addition to the parts explained in this article, the entire All projects use Golang.
• MySQL: used to store user information, order information, vehicle information, etc.
• Redis: used to store user and driver online status.
• Nginx: used for reverse proxy and load balancing.

3. Implementation process

3.1 Client

The functions that need to be implemented on the client are: select the starting point, destination and car model, and place an order , payment and order cancellation, etc. Here we assume that the user has logged in and registered, and has bound Alipay or WeChat payment.

When the user clicks the order button, the client will send a request to the server, including the longitude, latitude, vehicle model and other information of the starting point and destination. The server stores this information into MySQL and queries qualified drivers from Redis. The queried driver information will be sent to the driver terminal, and the driver can choose whether to accept the order on the client terminal. If the driver accepts the order, the client can see the driver's location, license plate number and other information. When the order is completed, the client will notify the server to make the payment. After the payment is completed, the order ends.

3.2 Driver Terminal

The functions that the driver terminal needs to implement include: receiving orders, confirming orders, paying and ending orders, etc. When the driver receives the matched order, the client will send a request and provide the order information. After the driver confirms the order, the client will notify the server to start billing. When the order is completed, the client will notify the server to end billing and send billing information.

3.3 Server side

The main functions that need to be implemented on the server side are: order matching, billing, communication with the client, driver side, etc.

The first function that the server needs to implement is to match qualified drivers based on the starting point and destination conditions provided by the passenger terminal and store the order information in MySQL. While waiting for the driver to receive the order, the server needs to continuously query qualified drivers from Redis and send the order information to the driver end. The driver can choose whether to accept the order according to his own situation.

When the order is accepted, the server needs to notify the client to start billing. Billing rules can be set differently based on factors such as region, car model, time, etc. After the order is completed, the server needs to send billing information to both clients and store the billing information in MySQL. If the driver has confirmed the bill, the server can initiate a payment request to the payment system.

The server also needs to implement instant communication with the client and driver so that notifications can be initiated in time when important changes occur in the order.

4. Summary

In this article, we introduced the basic process of writing a simple taxi-hailing software using Golang. Through this project, we can learn how to use MySQL and Redis for data storage, and how to use Golang for server-side development. However, the actual taxi-hailing software is much more complicated than this project, and there are many functions that need to be implemented. If you are interested, readers can continue to study in depth and improve and perfect this project.

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