From 4f9c431d9b5bcf3837e988ebea3ff717e30d50ac Mon Sep 17 00:00:00 2001
From: usbharu <64310155+usbharu@users.noreply.github.com>
Date: Wed, 4 Sep 2024 18:55:10 +0900
Subject: [PATCH] =?UTF-8?q?feat:=20=E3=82=AF=E3=82=A8=E3=83=AA=E3=83=91?=
 =?UTF-8?q?=E3=83=A9=E3=83=A1=E3=83=BC=E3=82=BF=E3=81=A7SSR=E3=82=92?=
 =?UTF-8?q?=E4=BD=BF=E7=94=A8=E3=81=99=E3=82=8B=E3=81=8B=E3=82=92=E5=88=87?=
 =?UTF-8?q?=E3=82=8A=E6=9B=BF=E3=81=88=E3=82=8C=E3=82=8B=E3=82=88=E3=81=86?=
 =?UTF-8?q?=E3=81=AB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

SSRを使用するかの設定はセッショに保存され、次のアクセスから設定する必要はなくなる
サーバーはとりあえずSPA用のindexページを送信し、noscriptを検知してクエリパラメータ付きのページに遷移する
---
 .../hideout/core/config/WebMvcConfig.kt       | 13 ++++++
 .../springframework/SPAInterceptor.kt         | 46 +++++++++++++++++++
 .../src/main/resources/templates/index.html   | 18 ++++++++
 3 files changed, 77 insertions(+)
 create mode 100644 hideout-core/src/main/kotlin/dev/usbharu/hideout/core/config/WebMvcConfig.kt
 create mode 100644 hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/springframework/SPAInterceptor.kt
 create mode 100644 hideout-core/src/main/resources/templates/index.html

diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/config/WebMvcConfig.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/config/WebMvcConfig.kt
new file mode 100644
index 00000000..d940f617
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/config/WebMvcConfig.kt
@@ -0,0 +1,13 @@
+package dev.usbharu.hideout.core.config
+
+import dev.usbharu.hideout.core.infrastructure.springframework.SPAInterceptor
+import org.springframework.context.annotation.Configuration
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer
+
+@Configuration
+class WebMvcConfig(private val spaInterceptor: SPAInterceptor) : WebMvcConfigurer {
+    override fun addInterceptors(registry: InterceptorRegistry) {
+        registry.addInterceptor(spaInterceptor)
+    }
+}
\ No newline at end of file
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/springframework/SPAInterceptor.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/springframework/SPAInterceptor.kt
new file mode 100644
index 00000000..7f525144
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/springframework/SPAInterceptor.kt
@@ -0,0 +1,46 @@
+package dev.usbharu.hideout.core.infrastructure.springframework
+
+import jakarta.servlet.http.HttpServletRequest
+import jakarta.servlet.http.HttpServletResponse
+import org.springframework.stereotype.Component
+import org.springframework.web.servlet.HandlerInterceptor
+import org.springframework.web.servlet.ModelAndView
+import org.springframework.web.servlet.support.ServletUriComponentsBuilder
+
+@Component
+class SPAInterceptor : HandlerInterceptor {
+
+    override fun preHandle(request: HttpServletRequest, response: HttpServletResponse, handler: Any): Boolean {
+
+        if (request.getParameter("s") == "f") {
+            request.session.setAttribute("s", "f")
+        } else if (request.getParameter("s") == "t") {
+            request.session.setAttribute("s", "t")
+        }
+        return true
+    }
+
+    override fun postHandle(
+        request: HttpServletRequest,
+        response: HttpServletResponse,
+        handler: Any,
+        modelAndView: ModelAndView?
+    ) {
+        if (request.session.getAttribute("s") == "f") {
+            return
+        }
+        val title = modelAndView?.modelMap?.getOrDefault("title", "")
+        val url = modelAndView?.modelMap?.getOrDefault(
+            "url",
+            ServletUriComponentsBuilder.fromCurrentRequestUri().toUriString() + '?' + request.queryString
+        )
+        val description = modelAndView?.modelMap?.getOrDefault("description", "")
+        val image = modelAndView?.modelMap?.get("image")
+
+        modelAndView?.clear()
+        modelAndView?.addObject("nsUrl", request.requestURI + "?s=f" + request.queryString?.let { "&$it" }.orEmpty())
+        modelAndView?.addAllObjects(mapOf("title" to title, "url" to url, "description" to description))
+        image?.let { modelAndView?.addObject("image", it) }
+        modelAndView?.viewName = "index"
+    }
+}
\ No newline at end of file
diff --git a/hideout-core/src/main/resources/templates/index.html b/hideout-core/src/main/resources/templates/index.html
new file mode 100644
index 00000000..5caf7bd2
--- /dev/null
+++ b/hideout-core/src/main/resources/templates/index.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org">
+<head prefix="og: http://ogp.me/ns#">
+    <meta charset="UTF-8">
+    <title th:title="${title}">Title</title>
+    <meta property="og:url" th:content="${url}">
+    <meta property="og:title" th:content="${title}">
+    <meta property="og:description" th:content="${description}">
+    <th:block th:if="${image != null}">
+        <meta property="og:image" th:content="${image}">
+    </th:block>
+</head>
+<body>
+<noscript>
+    <a th:href="${nsUrl}">No Script</a>
+</noscript>
+</body>
+</html>
\ No newline at end of file