自动转换AMP版本

application/core/MY_Output.php

@@ -38,17 +38,14 @@ class MY_Output extends CI_Output {
         $this->create_folder_by_path(dirname($cache_path));
 
         //如果文件存在，先判断是否为缓存文件，防止覆盖原始程序文件
-        if (@file_exists($cache_path)) {
+        if (@file_exists($cache_path) && filesize($cache_path) > 0) {
             if (!$fp_read = @fopen($cache_path, FOPEN_READ)) {
                 return FALSE;
             }
 
             flock($fp_read, LOCK_SH);
 
-            $cache = '';
-            if (filesize($cache_path) > 0) {
             $cache = fread($fp_read, filesize($cache_path));
-            }
 
             flock($fp_read, LOCK_UN);
             fclose($fp_read);
@@ -119,7 +116,6 @@ class MY_Output extends CI_Output {
                     }
                 }
             }
-
             $html_object->save($cache_path . '.mobile.htm');
         }
 
@@ -127,7 +123,102 @@ class MY_Output extends CI_Output {
 		
 		
 		////// 生成AMP版本
-		//现在是写在information控制器中
+        ///
+		//用移动端版本生成
+		/*
+		    1.加载站点AMP模板，模板只有导航、头部、底部
+            2.删除全部js引用和内链代码
+            3.删除全部css引用，内联css放入<style amp-custom>
+            4.图片全部替换成amp-img，设置宽高，设置layout="responsive"
+            5.去掉所有元素中的style
+            6.去掉样式表中的!important
+			7.替换读取源文件title description keywords canonical
+			8.todo:增加application/ld+json
+		 */
+        if (!empty($_GET['amp_optimize'])) {//生成AMP版本
+
+			//当前文件夹下的AMP模板
+			$amp_template=file_get_contents(dirname(__FILE__).'/amp-template.html');
+
+			foreach ($html_object->find('title') as $title) {
+                $amp_template = str_replace('<!--@TITLE@-->', $title->innertext, $amp_template);
+            }
+			
+			foreach ($html_object->find('meta') as $meta) {
+				if($meta->name=='description'){
+					$amp_template = str_replace('<!--@DESCRIPTION@-->', $meta->content, $amp_template);
+				}
+				if($meta->name=='keywords'){
+					$amp_template = str_replace('<!--@KEYWORDS@-->', $meta->content, $amp_template);
+				}
+            }
+			
+			foreach ($html_object->find('script') as $script) {
+                $script->outertext = '';
+            }
+			
+            foreach ($html_object->find('link') as $link) {
+                if ($link->rel == 'stylesheet' && !empty($link->href)) {
+                    $link->outertext = '';
+                }
+                if ($link->rel == 'canonical' && !empty($link->href)) {
+                    $amp_template = str_replace('<!--@CANONICAL@-->', $link->href, $amp_template);
+                }
+            }
+
+			$style_content = '';
+            foreach ($html_object->find('style') as $style) {
+                $style_content .= $style->innertext;
+				$style->outertext = '';
+            }
+            $style_content = str_replace('!important', '', $style_content);
+			$amp_template = str_replace('/*@CUSTOM-CSS@*/', $style_content, $amp_template);
+
+            //获取图片尺寸，AMP要求必须填写width和height
+
+            //拼接请求的图片url，如 https://data.asiahighlights.com/imagesize.php?photo=/pic/logo-ah.png,/pic/ah-slide-logo.png
+            $request_size=array();
+            foreach ($html_object->find('img') as $image) {
+                $img_src = $image->src;
+                if (!empty($image->originalsrc)) {
+                    $img_src = $image->originalsrc;
+                }
+                $request_size[] = str_replace('https://data.asiahighlights.com', '', $img_src);
+            }
+
+            //请求图片尺寸
+            $image_sizes=array();
+            $parse_url='https://data.asiahighlights.com/imagesize.php?photo='.implode(',',$request_size);
+            $size_data=GET_HTTP($parse_url);
+            if(!empty($size_data)){
+                $size_data=json_decode($size_data);
+                foreach ($size_data as $item){
+                    $item->photo='https://data.asiahighlights.com'.$item->photo;
+                    $image_sizes[$item->photo]=$item;
+                }
+            }
+            //获取图片尺寸 end
+            foreach ($html_object->find('img') as $image) {
+                $img_src = $image->src;
+                if (!empty($image->originalsrc)) {
+                    $img_src = $image->originalsrc;
+                }
+                $img_alt = $image->alt;
+                $img_class = $image->class;
+                $img_size=$image_sizes[$img_src];
+                if(!empty($img_size)){
+                    $image->outertext = " <amp-img layout=\"responsive\" class=\"{$img_class}\" alt=\"{$img_alt}\" src=\"{$img_src}\" width=\"{$img_size->width}\" height=\"{$img_size->height}\"></amp-img>";
+                }
+         }
+		foreach ($html_object->find('#content_main') as $content_main) {
+			$amp_template = str_replace('<!--@CUSTOM-CONENT@-->', $content_main, $amp_template);
+		}
+		
+		 //替换掉写在组件上的样式
+		 $amp_template = preg_replace('/style=.+?[\'|"]/i', '', $amp_template);
+		 
+        file_put_contents($cache_path . '.amp.htm',$amp_template);
+        }
 		
 		////// 生成AMP版本 end
 

application/views/information_none.php

@@ -1 +1 @@
-<?php echo str_replace('textarea##','textarea',$detail->ic_content); ?>
+<div id="content_main"><?php echo str_replace('textarea##','textarea',$detail->ic_content); ?></div>