How to use Golang to implement Alipay development of web applications

With the rapid development of the Internet, e-commerce has become the mainstream way for people to shop. Payment is a very important part of e-commerce, and Alipay, as a major payment method, has become an indispensable part of e-commerce. This article will introduce how to use Golang to develop Alipay web applications.

1. Register an Alipay developer account

First, you need to register an Alipay developer account. The developer account registration address is https://open.alipay.com. After the registration is completed, you need to perform authentication and settlement configuration.

2. Create an application

After the authentication and settlement configuration are completed, create an application on the Alipay open platform. After the application is created, you will get the application ID, application private key and Alipay public key.

3. Generate RSA key pair

When using the Alipay Developer API, you need to use an RSA key pair for signing and verification. You can use openssl to generate a key pair. The command is as follows:

openssl genrsa -out app_private_key.pem 2048
openssl rsa -in app_private_key.pem -pubout -out app_public_key.pem

After generating the key pair, you need to save the private key and public key to the app_private_key.pem and app_public_key.pem files respectively.

4. Install golang SDK

Since this article uses golang to write Alipay Web applications, we need to install Alipay’s golang SDK. You can use the following command to install:

go get -u github.com/smartwalle/alipay

Put the above code into the command line to automatically install Alipay golang SDK.

5. Write code

The following is a simple sample code:

package main

import (
    "fmt"
    "github.com/smartwalle/alipay"
)

func main() {
    //应用ID
    appId := "your_app_id"

    //应用私钥
    privateKey := `your_app_private_key`

    //支付宝公钥
    publicKey := `your_alipay_public_key`

    //创建支付宝实例
    client := alipay.New(appId, publicKey, privateKey, false)

    //构造表单
    formData := make(alipay.Params)
    formData.Set("seller_id", "your_seller_id")
    formData.Set("out_trade_no", "your_trade_no")
    formData.Set("subject", "your_goods_subject")
    formData.Set("total_amount", "your_goods_total")

    //生成签名
    sign, err := client.TradePagePay(formData)
    if err != nil {
        fmt.Println("generate sign error:", err)
        return
    }

    //构建支付宝请求URL 
    requestUrl := client.GetRequestUrl(sign)

    //输出请求URL
    fmt.Println(requestUrl)
}

In the above code, we first need to add the application ID, application private key and Alipay public key Pass it into the Alipay instance. Then you can construct the payment form formData, and finally use the TradePagePay method to generate a signature and build the Alipay request URL. The last step is to output the request URL.

6. Test

After completing the code writing, we need to test it. Use the go run command to run the code. In the output URL, copy the link, paste it into the browser to open, and perform Alipay payment operation.

7. Summary

This article introduces how to use golang to develop Alipay web applications, mainly including registering a developer account, creating an application, generating an RSA key pair, installing golang SDK, and writing code. Testing and other steps. I believe that through the introduction of this article, you can easily get started using golang to develop Alipay web applications.

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