Feat: dynamic writing site title, favicon, description, custom html (#286)

middleware/option.go

@@ -1,10 +1,13 @@
 package middleware
 
 import (
+	"github.com/HFO4/cloudreve/bootstrap"
 	model "github.com/HFO4/cloudreve/models"
 	"github.com/HFO4/cloudreve/pkg/hashid"
 	"github.com/HFO4/cloudreve/pkg/serializer"
+	"github.com/HFO4/cloudreve/pkg/util"
 	"github.com/gin-gonic/gin"
+	"io/ioutil"
 )
 
 // HashID 将给定对象的HashID转换为真实ID
@@ -38,3 +41,43 @@ func IsFunctionEnabled(key string) gin.HandlerFunc {
 		c.Next()
 	}
 }
+
+// InjectSiteInfo 向首页html中插入站点信息
+func InjectSiteInfo() gin.HandlerFunc {
+	ignoreFunc := func(c *gin.Context) {
+		c.Next()
+	}
+	// 读取index.html
+	file, err := bootstrap.StaticFS.Open("/index.html")
+	if err != nil {
+		util.Log().Warning("静态文件[index.html]不存在，可能会影响首页展示")
+		return ignoreFunc
+	}
+
+	fileContentBytes, err := ioutil.ReadAll(file)
+	if err != nil {
+		util.Log().Warning("静态文件[index.html]读取失败，可能会影响首页展示")
+		return ignoreFunc
+	}
+	fileContent := string(fileContentBytes)
+
+	return func(c *gin.Context) {
+		if c.Request.URL.Path == "/" || c.Request.URL.Path == "/index.html" {
+			// 读取、替换站点设置
+			options := model.GetSettingByNames("siteName", "siteKeywords", "siteScript",
+				"pwa_small_icon")
+			finalHTML := util.Replace(map[string]string{
+				"{siteName}":       options["siteName"],
+				"{siteDes}":        options["siteDes"],
+				"{siteScript}":     options["siteScript"],
+				"{pwa_small_icon}": options["pwa_small_icon"],
+			}, fileContent)
+
+			c.Header("Content-Type", "text/html")
+			c.String(200, finalHTML)
+			c.Abort()
+			return
+		}
+		c.Next()
+	}
+}