直接从 bing 搜索主页获取图片链接, 修改链接中的大小, 获取图片, 调用windows的 dll 设置桌面背景图
package main
import (
"crypto/md5"
"encoding/hex"
"errors"
"fmt"
"github.com/antchfx/htmlquery"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"regexp"
"strings"
"syscall"
"time"
"unsafe"
)
const (
UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36"
BingHomeURL = "https://cn.bing.com"
CurrentPathDir = "cache/"
)
const (
Size1k string = "1920,1080"
Size2k string = "2560,1440"
Size4k string = "3840,2160"
)
// ImageSize 图片大小
type ImageSize struct {
w string
h string
}
func init() {
_ = os.Mkdir(CurrentPathDir, 0755)
}
// EncodeMD5 MD5编码
func EncodeMD5(value string) string {
m := md5.New()
m.Write([]byte(value))
return hex.EncodeToString(m.Sum(nil))
}
// SetWindowsWallpaper 设置windows壁纸
func SetWindowsWallpaper(imagePath string) error {
dll := syscall.NewLazyDLL("user32.dll")
proc := dll.NewProc("SystemParametersInfoW")
_t, _ := syscall.UTF16PtrFromString(imagePath)
ret, _, _ := proc.Call(20, 1, uintptr(unsafe.Pointer(_t)), 0x1|0x2)
if ret != 1 {
return errors.New("系统调用失败")
}
return nil
}
// GetBingBackgroundImageURL 获取bing主页的背景图片链接
func GetBingBackgroundImageURL() (string, error) {
client := http.Client{}
request, err := http.NewRequest("GET", BingHomeURL, nil)
if err != nil {
return "", err
}
request.Header.Set("user-agent", UserAgent)
response, err := client.Do(request)
if err != nil {
return "", err
}
htmlDoc, err := htmlquery.Parse(response.Body)
if err != nil {
return "", err
}
item := htmlquery.FindOne(htmlDoc, "//div[@id=\"bgImgProgLoad\"]")
result := htmlquery.SelectAttr(item, "data-ultra-definition-src")
return BingHomeURL + result, nil
}
// DownloadImage 下载图片,保存并返回保存的文件名的绝对路径
func DownloadImage(imageURL string, size *ImageSize) (string, error) {
wRegexp := regexp.MustCompile("w=\\d+")
hRegexp := regexp.MustCompile("h=\\d+")
imageURL = wRegexp.ReplaceAllString(imageURL, "w="+size.w)
imageURL = hRegexp.ReplaceAllString(imageURL, "h="+size.h)
client := http.Client{}
request, err := http.NewRequest("GET", imageURL, nil)
if err != nil {
return "", err
}
response, err := client.Do(request)
if err != nil {
return "", err
}
body, err := ioutil.ReadAll(response.Body)
if err != nil {
return "", err
}
day := time.Now().Format("2006-01-02")
fileName := EncodeMD5(imageURL)
path := CurrentPathDir + fmt.Sprintf("[%sx%s][%s]%s", size.w, size.h, day, fileName) + ".jpg"
err = ioutil.WriteFile(path, body, 0755)
if err != nil {
return "", err
}
absPath, err := filepath.Abs(path)
if err != nil {
return "", err
}
return absPath, nil
}
func main() {
fmt.Println("获取必应背景图中...")
imageURL, err := GetBingBackgroundImageURL()
if err != nil {
fmt.Println("获取背景图片链接失败: " + err.Error())
return
}
fmt.Println("获取成功: " + imageURL)
fmt.Println("下载图片...")
imagePath, err := DownloadImage(imageURL, &ImageSize{
w: strings.Split(Size4k, ",")[0],
h: strings.Split(Size4k, ",")[1],
})
if err != nil {
fmt.Println("下载图片失败: " + err.Error())
return
}
fmt.Println("设置桌面...")
err = SetWindowsWallpaper(imagePath)
if err != nil {
fmt.Println("设置桌面背景失败: " + err.Error())
return
}
}
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