init: hgmj server initial commit

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

common/picture.go

@@ -0,0 +1,38 @@
+package common
+
+import (
+	"bytes"
+	"image"
+	"io"
+	"net/http"
+)
+
+type PictureProp struct {
+	Size   int `json:"size" bson:"size,omitempty"` // 单位:b
+	Width  int `json:"height" bson:"height,omitempty"`
+	Height int `json:"width" bson:"width,omitempty"`
+}
+
+const ImgUrlHost = "http://image.lhexm.com/"
+
+func GetPictureProp(imgURL string) PictureProp {
+	res, err := http.Get(imgURL)
+	if err != nil {
+		return PictureProp{}
+	}
+	defer res.Body.Close()
+	body, err := io.ReadAll(res.Body)
+	if err != nil {
+		return PictureProp{}
+	}
+	buf := bytes.NewBuffer(body)
+	cfg, _, err := image.DecodeConfig(buf)
+	if err != nil {
+		return PictureProp{}
+	}
+	return PictureProp{
+		Size:   len(body),
+		Width:  cfg.Width,
+		Height: cfg.Height,
+	}
+}