response響應頭設定總結
阿新 • • 發佈:2018-12-11
/*********************************設定瀏覽器無快取******************************/
//resp.setHeader:傳送一個報頭,告訴瀏覽器當前頁面不進行快取,每次訪問的時間必須從伺服器上讀取最新的資料
//no-cache:客戶端每次請求時必須向伺服器傳送
//must-revalidate:作用與no-cache相同,但更嚴謹
//no-store:快取將不存在response,包括header和body。
resp.setHeader("Cache-Control", "no-cache, no-store, must-revalidate" ); // HTTP 1.1.
// 本地無快取,自動重新整理頁面
resp.setHeader("Pragma", "no-cache");
// Expires實體報頭域給出響應過期的日期和時間,小於等於0表示當前頁面立即過期,
// 為了讓瀏覽器不要快取頁面,也可以利用Expires實體報關域,設定為0
resp.setDateHeader("Expires", 0);
/**********************************輸出某檔案*******************************/
//設定context-disposition響應頭,控制瀏覽器以下載形式開啟
//response.setHeader("content-disposition","attachment;filename="+URLEncoder.encode(fileName,"UTF-8"));
response.setHeader("Content-disposition", "attachment;filename=檔名稱");
// 由於匯出格式是excel的檔案,設定匯出檔案的響應頭部資訊
response.setContentType("application/vnd.ms-excel");
/*
'doc' => 'application/msword',
'bin' => 'application/octet-stream',
'exe' => 'application/octet-stream',
'so' => 'application/octet-stream',
'dll' => 'application/octet-stream',
'pdf' => 'application/pdf',
'ai' => 'application/postscript',
'xls' => 'application/vnd.ms-excel',
'ppt' => 'application/vnd.ms-powerpoint',
'dir' => 'application/x-director',
'js' => 'application/x-javascript',
'swf' => 'application/x-shockwave-flash',
'xhtml' => 'application/xhtml+xml',
'xht' => 'application/xhtml+xml',
'zip' => 'application/zip',
'mid' => 'audio/midi',
'midi' => 'audio/midi',
'mp3' => 'audio/mpeg',
'rm' => 'audio/x-pn-realaudio',
'rpm' => 'audio/x-pn-realaudio-plugin',
'wav' => 'audio/x-wav',
'bmp' => 'image/bmp',
'gif' => 'image/gif',
'jpeg' => 'image/jpeg',
'jpg' => 'image/jpeg',
'png' => 'image/png',
'css' => 'text/css',
'html' => 'text/html',
'htm' => 'text/html',
'txt' => 'text/plain',
'xsl' => 'text/xml',
'xml' => 'text/xml',
'mpeg' => 'video/mpeg',
'mpg' => 'video/mpeg',
'avi' => 'video/x-msvideo',
'movie' => 'video/x-sgi-movie',
*/
/**********************************禁止圖片快取*******************************/
// 禁止影象快取。
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
response.setContentType("image/jpeg");
// 將影象輸出到Servlet輸出流中。
ServletOutputStream out = response.getOutputStream();
ImageIO.write(captchaEngine.generatorCaptcha(request), "jpeg", out);
/*************************************其他*************************************/
response.setStatus(302)//臨時定向響應碼
ponse.setHeader("Location","/day03_00_ResponseHeader/servlet/ResponseHeaderDemo2");///day03_00_ResponseHeader/servlet/ResponseHeaderDemo2 代表轉向的地址
response.setHeader("Refresh", "3;url=http://www.baidu.com"); //告訴客戶端 三秒後重新整理