#284 后台下载全部元数据xml文件

application/admin/controllers/DataController.php

@@ -332,32 +332,67 @@ class Admin_DataController extends Zend_Controller_Action
 			
 		}//编辑附件
 		
+		/*
+		* 输出打包下载的xml文件
+		*
+		* 文件量大时可能出现超时，需要修改超时时间为无限
+		*/
 		elseif ($down) {
-			$zip = new ZipArchive();
-			$url="/tmp/xml.zip";
-			$opened=$zip->open($url, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE);
-    		if( $opened !== true ){
-        		die("cannot open {$url} for writing.");
-    		}			
-			$dirName = '../data/import/';
-			$zip->addEmptyDir("xml/");
 			
-  			$filesToAdd = array();
-  			$dir = dir($dirName);
-    		while (false !== ($node = $dir->read())) {
-        		if (($node == '..') || ($node == '.')) {
-           		continue;
-        		}
-       		if (is_file($dirName.$node)) {
-            	$zip->addFile($dirName.$node,"xml/".$node);
-        		}
-    		} 		
-   		$zip->close(); 
-    		$content=file_get_contents($url);
 			$this->_helper->layout->disableLayout();
 			$this->_helper->viewRenderer->setNoRender();
+			
+			//临时zip文件名
+			$tmpname="dataxml";
+			
+			//xml文件存放的缓存目录
+			$dirName = '../data/import/';
+			
+			//查询需要创建的文件
+			$sql = "SELECT md.title,md.uuid,x.* from xml x
+					LEFT JOIN metadata md ON md.id=x.id";
+					
+			$sth = $this->db->prepare($sql);
+			$sth->execute();
+			$rows = $sth->fetchAll(); //将结果储存，但不使用
+			
+			//创建zip文件，创建成功后再使用查询结果
+			$zip = new ZipArchive();
+			$url = tempnam($this->config->temp->path,$tmpname);//创建临时文件
+
+			if( $zip->open($url, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE) !== true )
+			{
+				throw new Exception("cannot open {$url} for writing.");
+			}
+			
+			foreach($rows as $k=>$v)
+			{
+				
+				$filename = $dirName.$v['uuid'].'.xml';
+				
+				//创建xml文件
+				$handle = fopen($filename,"w");
+				fwrite($handle,$v['data']);
+				fclose($handle);
+				
+				//添加到zip文件
+				//zip localname 直接使用UUID作为文件名
+				$zip->addFile($filename,$v['uuid'].".xml");
+
+			}
+			$zip->close(); 
+			
+			//zip文件创建完成后删除服务器上的缓存文件，防止发生冗余
+			foreach($rows as $k=>$v)
+			{
+				$filename = $dirName.$v['uuid'].'.xml';
+				unlink($filename);
+			}
+
+    		//输出下载
+			$content=file_get_contents($url);
 			$this->getResponse()->setHeader('Content-Type', 'application/octet-stream')
-									->setHeader('Content-Disposition','attachment; filename="'.basename($url).'"')
+											->setHeader('Content-Disposition','attachment; filename="dataxml.zip"')
 											->setHeader('Content-Length', strlen($content))
 											->setHeader('Content-Type','application/force-download')
 											->setHeader('Content-Type','application/download')