How to use regular expressions to verify the location of mobile phone numbers in golang

Using regular expressions to verify mobile phone numbers in golang can be achieved through the built-in regexp package. To verify the location of a mobile phone number, you need to use a third-party open interface, such as the mobile phone number location query interface provided by Taobao Open Platform. The following is a simple implementation:

1. Import the necessary packages and definition structures

import (
    "regexp"
    "net/http"
    "io/ioutil"
    "encoding/json"
)

type TaobaoResult struct {
    Code int `json:"code"`
    Data struct {
        City string `json:"city"`
    } `json:"data"`
}

2. Define regular expressions and mobile phone number matching functions

var phoneRegex = regexp.MustCompile(`^1[3456789]d{9}$`)

func isPhoneValid(phone string) bool {
    return phoneRegex.MatchString(phone)
}

3. Define mobile phone number location query function

func getPhoneLocation(phone string) (string, error) {
    if !isPhoneValid(phone) {
        return "", fmt.Errorf("invalid phone number: %s", phone)
    }

    url := fmt.Sprintf("https://tcc.taobao.com/cc/json/mobile_tel_segment.htm?tel=%s", phone)
    resp, err := http.Get(url)
    if err != nil {
        return "", err
    }
    defer resp.Body.Close()

    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        return "", err
    }

    result := &TaobaoResult{}
    json.Unmarshal(body, result)

    if result.Code != 0 {
        return "", fmt.Errorf("error code: %d", result.Code)
    }

    return result.Data.City, nil
}

4. Test code

func main() {
    phone := "13812345678"
    location, err := getPhoneLocation(phone)
    if err != nil {
        fmt.Printf("failed to get location of %s: %s
", phone, err.Error())
    } else {
        fmt.Printf("%s belongs to %s
", phone, location)
    }
}

The above code implements the use of regular expressions Verify the mobile phone number and check its location. However, it should be noted that since this implementation relies on a third-party open interface, you need to pay attention to the access frequency limit of the interface and the interface changes. At the same time, this implementation is just an example, and more sophisticated error handling and interface request optimization may be required in actual applications.

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