feat: PhotoWall 毕业照存储系统初始版本

后端: Go(Gin+GORM+MySQL+Redis) - 17张业务表(yz_pw_前缀), 自动迁移 - JWT认证(3小时) + 盐+MD5密码 + 图形验证码 - 班级CRUD/加入(8人姓名验证/邀请码)/审核/30天自动清理 - 系统配置(16项)/菜单管理(动态路由)/数据统计 - 文件MD5去重/数据隔离/账号封禁/敏感词DFA检测前端: Vue3+Vite+Element Plus+Less+ECharts+FontAwesome - 动态路由(数据库菜单驱动) - 蓝白配色, H5响应式 - 登录/注册/忘记密码/个人中心 - 班级创建向导/详情/加入/列表 - 管理后台: 审核/配置/菜单/统计/用户/敏感词数据库: MySQL 10.31.100.3:3306/photowall 管理员: hero920103 / 920103
2026-09-03 05:55:23 +08:00
commit 57d9866dab
82 changed files with 12668 additions and 0 deletions
@@ -0,0 +1,198 @@
+package captcha
+
+import (
+	"context"
+	"crypto/rand"
+	"encoding/base64"
+	"fmt"
+	"image"
+	"image/color"
+	"image/draw"
+	"image/png"
+	"math/big"
+	"photowall/pkg/redis"
+	"strings"
+	"time"
+)
+
+const chars = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789"
+
+// Generate 生成图形验证码，返回 captcha_id 和 base64 图片
+func Generate() (id string, imgBase64 string) {
+	code := randomCode(4)
+	id = randomID()
+	// 存入 Redis，5分钟过期
+	redis.Set(context.Background(), "captcha:"+id, code, 5*time.Minute)
+
+	img := drawImage(code)
+	imgBase64 = encodeToBase64(img)
+	return id, "data:image/png;base64," + imgBase64
+}
+
+// Verify 校验验证码，校验成功后立即删除（一次性）
+// 开发万能码：888888（任意 captcha_id 均可通过，仅用于开发测试）
+func Verify(id, code string) bool {
+	if code == "888888" {
+		return true
+	}
+	if id == "" || code == "" {
+		return false
+	}
+	stored, err := redis.Get(context.Background(), "captcha:"+id)
+	if err != nil {
+		return false
+	}
+	redis.Del(context.Background(), "captcha:"+id) // 一次性
+	return strings.EqualFold(stored, code)
+}
+
+func randomCode(length int) string {
+	b := make([]byte, length)
+	for i := range b {
+		n, _ := rand.Int(rand.Reader, big.NewInt(int64(len(chars))))
+		b[i] = chars[n.Int64()]
+	}
+	return string(b)
+}
+
+func randomID() string {
+	b := make([]byte, 16)
+	rand.Read(b)
+	return fmt.Sprintf("%x", b)
+}
+
+// ============ 图片绘制 ============
+
+func drawImage(code string) image.Image {
+	width, height := 120, 40
+	img := image.NewRGBA(image.Rect(0, 0, width, height))
+	bg := color.RGBA{240, 245, 255, 255}
+	draw.Draw(img, img.Bounds(), &image.Uniform{bg}, image.Point{}, draw.Src)
+
+	for i := 0; i < 4; i++ {
+		x1, _ := rand.Int(rand.Reader, big.NewInt(int64(width)))
+		y1, _ := rand.Int(rand.Reader, big.NewInt(int64(height)))
+		x2, _ := rand.Int(rand.Reader, big.NewInt(int64(width)))
+		y2, _ := rand.Int(rand.Reader, big.NewInt(int64(height)))
+		drawLine(img, int(x1.Int64()), int(y1.Int64()), int(x2.Int64()), int(y2.Int64()), randomColor())
+	}
+	for i := 0; i < 30; i++ {
+		x, _ := rand.Int(rand.Reader, big.NewInt(int64(width)))
+		y, _ := rand.Int(rand.Reader, big.NewInt(int64(height)))
+		img.Set(int(x.Int64()), int(y.Int64()), randomColor())
+	}
+	for i, ch := range code {
+		drawChar(img, 15+i*25, 28, string(ch), randomDarkColor())
+	}
+	return img
+}
+
+func drawChar(img *image.RGBA, x, y int, ch string, c color.Color) {
+	font := map[rune][7]string{
+		'0': {"01110", "10001", "10011", "10101", "11001", "10001", "01110"},
+		'1': {"00100", "01100", "00100", "00100", "00100", "00100", "01110"},
+		'2': {"01110", "10001", "00001", "00010", "00100", "01000", "11111"},
+		'3': {"11110", "00001", "00001", "01110", "00001", "00001", "11110"},
+		'4': {"00010", "00110", "01010", "10010", "11111", "00010", "00010"},
+		'5': {"11111", "10000", "11110", "00001", "00001", "10001", "01110"},
+		'6': {"00110", "01000", "10000", "11110", "10001", "10001", "01110"},
+		'7': {"11111", "00001", "00010", "00100", "01000", "01000", "01000"},
+		'8': {"01110", "10001", "10001", "01110", "10001", "10001", "01110"},
+		'9': {"01110", "10001", "10001", "01111", "00001", "00010", "01100"},
+		'A': {"01110", "10001", "10001", "11111", "10001", "10001", "10001"},
+		'B': {"11110", "10001", "10001", "11110", "10001", "10001", "11110"},
+		'C': {"01111", "10000", "10000", "10000", "10000", "10000", "01111"},
+		'D': {"11110", "10001", "10001", "10001", "10001", "10001", "11110"},
+		'E': {"11111", "10000", "10000", "11110", "10000", "10000", "11111"},
+		'F': {"11111", "10000", "10000", "11110", "10000", "10000", "10000"},
+		'G': {"01111", "10000", "10000", "10111", "10001", "10001", "01110"},
+		'H': {"10001", "10001", "10001", "11111", "10001", "10001", "10001"},
+		'J': {"00001", "00001", "00001", "00001", "00001", "10001", "01110"},
+		'K': {"10001", "10010", "10100", "11000", "10100", "10010", "10001"},
+		'L': {"10000", "10000", "10000", "10000", "10000", "10000", "11111"},
+		'M': {"10001", "11011", "10101", "10101", "10001", "10001", "10001"},
+		'N': {"10001", "11001", "10101", "10011", "10001", "10001", "10001"},
+		'P': {"11110", "10001", "10001", "11110", "10000", "10000", "10000"},
+		'Q': {"01110", "10001", "10001", "10001", "10101", "10010", "01101"},
+		'R': {"11110", "10001", "10001", "11110", "10100", "10010", "10001"},
+		'S': {"01111", "10000", "10000", "01110", "00001", "00001", "11110"},
+		'T': {"11111", "00100", "00100", "00100", "00100", "00100", "00100"},
+		'U': {"10001", "10001", "10001", "10001", "10001", "10001", "01110"},
+		'V': {"10001", "10001", "10001", "10001", "10001", "01010", "00100"},
+		'W': {"10001", "10001", "10001", "10101", "10101", "11011", "10001"},
+		'X': {"10001", "10001", "01010", "00100", "01010", "10001", "10001"},
+		'Y': {"10001", "10001", "01010", "00100", "00100", "00100", "00100"},
+		'Z': {"11111", "00001", "00010", "00100", "01000", "10000", "11111"},
+	}
+	pattern, ok := font[rune(ch[0])]
+	if !ok {
+		pattern = font['0']
+	}
+	scale := 3
+	for row, line := range pattern {
+		for col, px := range line {
+			if px == '1' {
+				for dy := 0; dy < scale; dy++ {
+					for dx := 0; dx < scale; dx++ {
+						img.Set(x+col*scale+dx, y-row*scale-7*scale+dy, c)
+					}
+				}
+			}
+		}
+	}
+}
+
+func drawLine(img *image.RGBA, x1, y1, x2, y2 int, c color.Color) {
+	dx := abs(x2 - x1)
+	dy := abs(y2 - y1)
+	sx, sy := 1, -1
+	if x1 > x2 {
+		sx = -1
+	}
+	if y1 < y2 {
+		sy = 1
+	}
+	err := dx - dy
+	for {
+		img.Set(x1, y1, c)
+		if x1 == x2 && y1 == y2 {
+			break
+		}
+		e2 := 2 * err
+		if e2 > -dy {
+			err -= dy
+			x1 += sx
+		}
+		if e2 < dx {
+			err += dx
+			y1 += sy
+		}
+	}
+}
+
+func abs(x int) int {
+	if x < 0 {
+		return -x
+	}
+	return x
+}
+
+func randomColor() color.RGBA {
+	r, _ := rand.Int(rand.Reader, big.NewInt(200))
+	g, _ := rand.Int(rand.Reader, big.NewInt(200))
+	b, _ := rand.Int(rand.Reader, big.NewInt(200))
+	return color.RGBA{uint8(r.Int64() + 55), uint8(g.Int64() + 55), uint8(b.Int64() + 55), 255}
+}
+
+func randomDarkColor() color.RGBA {
+	r, _ := rand.Int(rand.Reader, big.NewInt(100))
+	g, _ := rand.Int(rand.Reader, big.NewInt(100))
+	b, _ := rand.Int(rand.Reader, big.NewInt(150))
+	return color.RGBA{uint8(r.Int64()), uint8(g.Int64()), uint8(b.Int64() + 50), 255}
+}
+
+func encodeToBase64(img image.Image) string {
+	var buf strings.Builder
+	png.Encode(base64.NewEncoder(base64.StdEncoding, &buf), img)
+	return buf.String()
+}