✨ b3log#151

controller/pjaxmidware.go

@@ -0,0 +1,65 @@
+// Pipe - A small and beautiful blogging platform written in golang.
+// Copyright (C) 2017-2018, b3log.org
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package controller
+
+import (
+	"github.com/gin-gonic/gin"
+	"regexp"
+	"strings"
+)
+
+func pjax(c *gin.Context) {
+	isPJAX := isPJAX(c)
+	model := getDataModel(c)
+	model["pjax"] = isPJAX
+
+	if !isPJAX {
+		c.Next()
+
+		return
+	}
+
+	c.Writer = &pjaxHTMLWriter{c.Writer, &strings.Builder{}, c}
+	c.Next()
+}
+
+type pjaxHTMLWriter struct {
+	gin.ResponseWriter
+	bodyBuilder *strings.Builder
+	c           *gin.Context
+}
+
+func (p *pjaxHTMLWriter) Write(data []byte) (int, error) {
+	p.bodyBuilder.Write(data)
+	if !strings.HasSuffix(string(data), "</html>\r\n") {
+		return 0, nil
+	}
+
+	pjaxContainer := p.c.Request.Header.Get("X-PJAX-Container")
+	body := p.bodyBuilder.String()
+	r := regexp.MustCompile("<!---- pjax {" + pjaxContainer + "} start ---->(.+)?<!---- pjax {" + pjaxContainer + "} end ---->")
+	containers := r.FindStringSubmatch(body)
+	if 0 == len(containers) {
+		return p.ResponseWriter.WriteString(body)
+	}
+
+	return p.ResponseWriter.WriteString(strings.Join(containers, ""))
+}
+
+func isPJAX(c *gin.Context) bool {
+	return "true" == c.Request.Header.Get("X-PJAX") && "" != c.Request.Header.Get("X-PJAX-Container")
+}

controller/router.go

@@ -171,7 +171,7 @@ func MapRoutes() *gin.Engine {
 	templates = append(templates, headTemplates...)
 	ret.LoadHTMLFiles(templates...)
 	themeGroup := ret.Group(util.PathBlogs + "/:username")
-	themeGroup.Use(fillUser, resolveBlog)
+	themeGroup.Use(fillUser, pjax, resolveBlog)
 	themeGroup.GET("", showArticlesAction)
 	themeGroup.Any("/*path", routePath)