前言
前段时间在“soarli实验室”搭建了“AI书架”，涉及到大量pdf文件的问题，目标如下：
- 点击即可在浏览器里面预览，不必下载
- 尽量隐藏真实文件地址，最大化程度上尊重版权
- 不明确提供下载/打印功能
- 多设备、多浏览器均可用
- 要能够确保打开、实际渲染的速度不能太慢
- 考虑经济效益，尽最大可能减少恶意请求带来的影响
如果直接跨域引用CDN上的资源，严格意义上讲，以上几点都不能满足。
一次尝试
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>soarli - pdf</title>
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/jquery.media.js"></script>
<script type="text/javascript">
$(function() {
$('a.media').media();
$('a.mediase').media();
});
</script>
</head>
<body>
<center>
<div class="panel panel-primary">
<div class="panel-heading" align="center">
</div>
<div class="panel-body">
<a class="media" href="pdf1.pdf"></a>
</div>
</center>
</body>
</html>jquery.media.js
/*
* jQuery Media Plugin for converting elements into rich media content.
*
* Examples and documentation at: http://malsup.com/jquery/media/
* Copyright (c) 2007-2010 M. Alsup
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
* @author: M. Alsup
* @version: 0.99 (05-JUN-2013)
* @requires jQuery v1.1.2 or later
* $Id: jquery.media.js 2460 2007-07-23 02:53:15Z malsup $
*
* Supported Media Players:
* - Flash
* - Quicktime
* - Real Player
* - Silverlight
* - Windows Media Player
* - iframe
*
* Supported Media Formats:
* Any types supported by the above players, such as:
* Video: asf, avi, flv, mov, mpg, mpeg, mp4, qt, smil, swf, wmv, 3g2, 3gp
* Audio: aif, aac, au, gsm, mid, midi, mov, mp3, m4a, snd, rm, wav, wma
* Other: bmp, html, pdf, psd, qif, qtif, qti, tif, tiff, xaml
*
* Thanks to Mark Hicken and Brent Pedersen for helping me debug this on the Mac!
* Thanks to Dan Rossi for numerous bug reports and code bits!
* Thanks to Skye Giordano for several great suggestions!
* Thanks to Richard Connamacher for excellent improvements to the non-IE behavior!
*/
/*global SWFObject alert Sys */
/*jshint forin:false */
;(function($) {
"use strict";
var mode = document.documentMode || 0;
var msie = /MSIE/.test(navigator.userAgent);
var lameIE = msie && (/MSIE (6|7|8)\.0/.test(navigator.userAgent) || mode < 9);
/**
* Chainable method for converting elements into rich media.
*
* @param options
* @param callback fn invoked for each matched element before conversion
* @param callback fn invoked for each matched element after conversion
*/
$.fn.media = function(options, f1, f2) {
if (options == 'undo') {
return this.each(function() {
var $this = $(this);
var html = $this.data('media.origHTML');
if (html)
$this.replaceWith(html);
});
}
return this.each(function() {
if (typeof options == 'function') {
f2 = f1;
f1 = options;
options = {};
}
var o = getSettings(this, options);
// pre-conversion callback, passes original element and fully populated options
if (typeof f1 == 'function') f1(this, o);
var r = getTypesRegExp();
var m = r.exec(o.src.toLowerCase()) || [''];
var fn;
if (o.type)
m[0] = o.type;
else
m.shift();
for (var i=0; i < m.length; i++) {
fn = m[i].toLowerCase();
if (isDigit(fn[0])) fn = 'fn' + fn; // fns can't begin with numbers
if (!$.fn.media[fn])
continue; // unrecognized media type
// normalize autoplay settings
var player = $.fn.media[fn+'_player'];
if (!o.params) o.params = {};
if (player) {
var num = player.autoplayAttr == 'autostart';
o.params[player.autoplayAttr || 'autoplay'] = num ? (o.autoplay ? 1 : 0) : o.autoplay ? true : false;
}
var $div = $.fn.media[fn](this, o);
$div.css('backgroundColor', o.bgColor).width(o.width);
if (o.canUndo) {
var $temp = $('<div></div>').append(this);
$div.data('media.origHTML', $temp.html()); // store original markup
}
// post-conversion callback, passes original element, new div element and fully populated options
if (typeof f2 == 'function') f2(this, $div[0], o, player.name);
break;
}
});
};
/**
* Non-chainable method for adding or changing file format / player mapping
* @name mapFormat
* @param String format File format extension (ie: mov, wav, mp3)
* @param String player Player name to use for the format (one of: flash, quicktime, realplayer, winmedia, silverlight or iframe
*/
$.fn.media.mapFormat = function(format, player) {
if (!format || !player || !$.fn.media.defaults.players[player]) return; // invalid
format = format.toLowerCase();
if (isDigit(format[0])) format = 'fn' + format;
$.fn.media[format] = $.fn.media[player];
$.fn.media[format+'_player'] = $.fn.media.defaults.players[player];
};
// global defautls; override as needed
$.fn.media.defaults = {
standards: true, // use object tags only (no embeds for non-IE browsers)
canUndo: true, // tells plugin to store the original markup so it can be reverted via: $(sel).mediaUndo()
width: $(window).width(),
height: $(window).height(),
autoplay: 0, // normalized cross-player setting
bgColor: '#ffffff', // background color
params: { wmode: 'transparent'}, // added to object element as param elements; added to embed element as attrs
attrs: {}, // added to object and embed elements as attrs
flvKeyName: 'file', // key used for object src param (thanks to Andrea Ercolino)
flashvars: {}, // added to flash content as flashvars param/attr
flashVersion: '7', // required flash version
expressInstaller: null, // src for express installer
// default flash video and mp3 player (@see: http://jeroenwijering.com/?item=Flash_Media_Player)
flvPlayer: 'mediaplayer.swf',
mp3Player: 'mediaplayer.swf',
// @see http://msdn2.microsoft.com/en-us/library/bb412401.aspx
silverlight: {
inplaceInstallPrompt: 'true', // display in-place install prompt?
isWindowless: 'true', // windowless mode (false for wrapping markup)
framerate: '24', // maximum framerate
version: '0.9', // Silverlight version
onError: null, // onError callback
onLoad: null, // onLoad callback
initParams: null, // object init params
userContext: null // callback arg passed to the load callback
}
};
// Media Players; think twice before overriding
$.fn.media.defaults.players = {
flash: {
name: 'flash',
title: 'Flash',
types: 'flv,mp3,swf',
mimetype: 'application/x-shockwave-flash',
pluginspage: 'http://www.adobe.com/go/getflashplayer',
ieAttrs: {
classid: 'clsid:d27cdb6e-ae6d-11cf-96b8-444553540000',
type: 'application/x-oleobject',
codebase: 'http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=' + $.fn.media.defaults.flashVersion
}
},
quicktime: {
name: 'quicktime',
title: 'QuickTime',
mimetype: 'video/quicktime',
pluginspage: 'http://www.apple.com/quicktime/download/',
types: 'aif,aiff,aac,au,bmp,gsm,mov,mid,midi,mpg,mpeg,mp4,m4a,psd,qt,qtif,qif,qti,snd,tif,tiff,wav,3g2,3gp',
ieAttrs: {
classid: 'clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B',
codebase: 'http://www.apple.com/qtactivex/qtplugin.cab'
}
},
realplayer: {
name: 'real',
title: 'RealPlayer',
types: 'ra,ram,rm,rpm,rv,smi,smil',
mimetype: 'audio/x-pn-realaudio-plugin',
pluginspage: 'http://www.real.com/player/',
autoplayAttr: 'autostart',
ieAttrs: {
classid: 'clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA'
}
},
winmedia: {
name: 'winmedia',
title: 'Windows Media',
types: 'asx,asf,avi,wma,wmv',
mimetype: isFirefoxWMPPluginInstalled() ? 'application/x-ms-wmp' : 'application/x-mplayer2',
pluginspage: 'http://www.microsoft.com/Windows/MediaPlayer/',
autoplayAttr: 'autostart',
oUrl: 'url',
ieAttrs: {
classid: 'clsid:6BF52A52-394A-11d3-B153-00C04F79FAA6',
type: 'application/x-oleobject'
}
},
// special cases
img: {
name: 'img',
title: 'Image',
types: 'gif,png,jpg'
},
iframe: {
name: 'iframe',
types: 'html,pdf'
},
silverlight: {
name: 'silverlight',
types: 'xaml'
}
};
//
// everything below here is private
//
// detection script for FF WMP plugin (http://www.therossman.org/experiments/wmp_play.html)
// (hat tip to Mark Ross for this script)
function isFirefoxWMPPluginInstalled() {
var plugs = navigator.plugins || [];
for (var i = 0; i < plugs.length; i++) {
var plugin = plugs[i];
if (plugin['filename'] == 'np-mswmp.dll')
return true;
}
return false;
}
var counter = 1;
for (var player in $.fn.media.defaults.players) {
var types = $.fn.media.defaults.players[player].types;
$.each(types.split(','), function(i,o) {
if (isDigit(o[0])) o = 'fn' + o;
$.fn.media[o] = $.fn.media[player] = getGenerator(player);
$.fn.media[o+'_player'] = $.fn.media.defaults.players[player];
});
}
function getTypesRegExp() {
var types = '';
for (var player in $.fn.media.defaults.players) {
if (types.length) types += ',';
types += $.fn.media.defaults.players[player].types;
}
return new RegExp('\\.(' + types.replace(/,/ig,'|') + ')\\b');
}
function getGenerator(player) {
return function(el, options) {
return generate(el, options, player);
};
}
function isDigit(c) {
return '0123456789'.indexOf(c) > -1;
}
// flatten all possible options: global defaults, meta, option obj
function getSettings(el, options) {
options = options || {};
var a, n;
var $el = $(el);
var cls = el.className || '';
// support metadata plugin (v1.0 and v2.0)
var meta = $.metadata ? $el.metadata() : $.meta ? $el.data() : {};
meta = meta || {};
var w = meta.width || parseInt(((cls.match(/\bw:(\d+)/)||[])[1]||0),10) || parseInt(((cls.match(/\bwidth:(\d+)/)||[])[1]||0),10);
var h = meta.height || parseInt(((cls.match(/\bh:(\d+)/)||[])[1]||0),10) || parseInt(((cls.match(/\bheight:(\d+)/)||[])[1]||0),10);
if (w) meta.width = w;
if (h) meta.height = h;
if (cls) meta.cls = cls;
// crank html5 style data attributes
var dataName = 'data-';
for (var i=0; i < el.attributes.length; i++) {
a = el.attributes[i], n = $.trim(a.name);
var index = n.indexOf(dataName);
if (index === 0) {
n = n.substring(dataName.length);
meta[n] = a.value;
}
}
a = $.fn.media.defaults;
var b = options;
var c = meta;
var p = { params: { bgColor: options.bgColor || $.fn.media.defaults.bgColor } };
var opts = $.extend({}, a, b, c);
$.each(['attrs','params','flashvars','silverlight'], function(i,o) {
opts[o] = $.extend({}, p[o] || {}, a[o] || {}, b[o] || {}, c[o] || {});
});
if (typeof opts.caption == 'undefined') opts.caption = $el.text();
// make sure we have a source!
opts.src = opts.src || $el.attr('href') || $el.attr('src') || 'unknown';
return opts;
}
//
// Flash Player
//
// generate flash using SWFObject library if possible
$.fn.media.swf = function(el, opts) {
var f, p;
if (!window.SWFObject && !window.swfobject) {
// roll our own
if (opts.flashvars) {
var a = [];
for (f in opts.flashvars)
a.push(f + '=' + opts.flashvars[f]);
if (!opts.params) opts.params = {};
opts.params.flashvars = a.join('&');
}
return generate(el, opts, 'flash');
}
var id = el.id ? (' id="'+el.id+'"') : '';
var cls = opts.cls ? (' class="' + opts.cls + '"') : '';
var $div = $('<div' + id + cls + '>');
// swfobject v2+
if (window.swfobject) {
$(el).after($div).appendTo($div);
if (!el.id) el.id = 'movie_player_' + counter++;
// replace el with swfobject content
window.swfobject.embedSWF(opts.src, el.id, opts.width, opts.height, opts.flashVersion,
opts.expressInstaller, opts.flashvars, opts.params, opts.attrs);
}
// swfobject < v2
else {
$(el).after($div).remove();
var so = new SWFObject(opts.src, 'movie_player_' + counter++, opts.width, opts.height, opts.flashVersion, opts.bgColor);
if (opts.expressInstaller) so.useExpressInstall(opts.expressInstaller);
for (p in opts.params)
if (p != 'bgColor') so.addParam(p, opts.params[p]);
for (f in opts.flashvars)
so.addVariable(f, opts.flashvars[f]);
so.write($div[0]);
}
if (opts.caption) $('<div>').appendTo($div).html(opts.caption);
return $div;
};
// map flv and mp3 files to the swf player by default
$.fn.media.flv = $.fn.media.mp3 = function(el, opts) {
var src = opts.src;
var player = /\.mp3\b/i.test(src) ? opts.mp3Player : opts.flvPlayer;
var key = opts.flvKeyName;
src = encodeURIComponent(src);
opts.src = player;
opts.src = opts.src + '?'+key+'=' + (src);
var srcObj = {};
srcObj[key] = src;
opts.flashvars = $.extend({}, srcObj, opts.flashvars );
return $.fn.media.swf(el, opts);
};
//
// Silverlight
//
$.fn.media.xaml = function(el, opts) {
if (!window.Sys || !window.Sys.Silverlight) {
if ($.fn.media.xaml.warning) return;
$.fn.media.xaml.warning = 1;
alert('You must include the Silverlight.js script.');
return;
}
var props = {
width: opts.width,
height: opts.height,
background: opts.bgColor,
inplaceInstallPrompt: opts.silverlight.inplaceInstallPrompt,
isWindowless: opts.silverlight.isWindowless,
framerate: opts.silverlight.framerate,
version: opts.silverlight.version
};
var events = {
onError: opts.silverlight.onError,
onLoad: opts.silverlight.onLoad
};
var id1 = el.id ? (' id="'+el.id+'"') : '';
var id2 = opts.id || 'AG' + counter++;
// convert element to div
var cls = opts.cls ? (' class="' + opts.cls + '"') : '';
var $div = $('<div' + id1 + cls + '>');
$(el).after($div).remove();
Sys.Silverlight.createObjectEx({
source: opts.src,
initParams: opts.silverlight.initParams,
userContext: opts.silverlight.userContext,
id: id2,
parentElement: $div[0],
properties: props,
events: events
});
if (opts.caption) $('<div>').appendTo($div).html(opts.caption);
return $div;
};
//
// generate object/embed markup
//
function generate(el, opts, player) {
var $el = $(el);
var o = $.fn.media.defaults.players[player];
var a, key, v;
if (player == 'iframe') {
o = $('<iframe' + ' width="' + opts.width + '" height="' + opts.height + '" >');
o.attr('src', opts.src);
o.css('backgroundColor', o.bgColor);
}
else if (player == 'img') {
o = $('<img>');
o.attr('src', opts.src);
if (opts.width)
o.attr('width', opts.width);
if (opts.height)
o.attr('height', opts.height);
o.css('backgroundColor', o.bgColor);
}
else if (lameIE) {
a = ['<object width="' + opts.width + '" height="' + opts.height + '" '];
for (key in opts.attrs)
a.push(key + '="'+opts.attrs[key]+'" ');
for (key in o.ieAttrs || {}) {
v = o.ieAttrs[key];
if (key == 'codebase' && window.location.protocol == 'https:')
v = v.replace('http','https');
a.push(key + '="'+v+'" ');
}
a.push('></ob'+'ject'+'>');
var p = ['<param name="' + (o.oUrl || 'src') +'" value="' + opts.src + '">'];
for (key in opts.params)
p.push('<param name="'+ key +'" value="' + opts.params[key] + '">');
o = document.createElement(a.join(''));
for (var i=0; i < p.length; i++)
o.appendChild(document.createElement(p[i]));
}
else if (opts.standards) {
// Rewritten to be standards compliant by Richard Connamacher
a = ['<object type="' + o.mimetype +'" width="' + opts.width + '" height="' + opts.height +'"'];
if (opts.src) a.push(' data="' + opts.src + '" ');
if (msie) {
for (key in o.ieAttrs || {}) {
v = o.ieAttrs[key];
if (key == 'codebase' && window.location.protocol == 'https:')
v = v.replace('http','https');
a.push(key + '="'+v+'" ');
}
}
a.push('>');
a.push('<param name="' + (o.oUrl || 'src') +'" value="' + opts.src + '">');
for (key in opts.params) {
if (key == 'wmode' && player != 'flash') // FF3/Quicktime borks on wmode
continue;
a.push('<param name="'+ key +'" value="' + opts.params[key] + '">');
}
// Alternate HTML
a.push('<div><p><strong>'+o.title+' Required</strong></p><p>'+o.title+' is required to view this media. <a href="'+o.pluginspage+'">Download Here</a>.</p></div>');
a.push('</ob'+'ject'+'>');
}
else {
a = ['<embed width="' + opts.width + '" height="' + opts.height + '" style="display:block"'];
if (opts.src) a.push(' src="' + opts.src + '" ');
for (key in opts.attrs)
a.push(key + '="'+opts.attrs[key]+'" ');
for (key in o.eAttrs || {})
a.push(key + '="'+o.eAttrs[key]+'" ');
for (key in opts.params) {
if (key == 'wmode' && player != 'flash') // FF3/Quicktime borks on wmode
continue;
a.push(key + '="'+opts.params[key]+'" ');
}
a.push('></em'+'bed'+'>');
}
// convert element to div
var id = el.id ? (' id="'+el.id+'"') : '';
var cls = opts.cls ? (' class="' + opts.cls + '"') : '';
var $div = $('<div' + id + cls + '>');
$el.after($div).remove();
if (lameIE || player == 'iframe' || player == 'img')
$div.append(o);
else
$div.html(a.join(''));
if (opts.caption)
$('<div>').appendTo($div).html(opts.caption);
return $div;
}
})(jQuery);
jquery.metadata.js
/*
* Metadata - jQuery plugin for parsing metadata from elements
*
* Copyright (c) 2006 John Resig, Yehuda Katz, Jörn Zaefferer
*
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
* Revision: $Id$
*
*/
/**
* Sets the type of metadata to use. Metadata is encoded in JSON, and each property
* in the JSON will become a property of the element itself.
*
* There are three supported types of metadata storage:
*
* attr: Inside an attribute. The name parameter indicates *which* attribute.
*
* class: Inside the class attribute, wrapped in curly braces: { }
*
* elem: Inside a child element (e.g. a script tag). The
* name parameter indicates *which* element.
*
* The metadata for an element is loaded the first time the element is accessed via jQuery.
*
* As a result, you can define the metadata type, use $(expr) to load the metadata into the elements
* matched by expr, then redefine the metadata type and run another $(expr) for other elements.
*
* @name $.meta.setType
*
* @example <p id="one" class="some_class {item_id: 1, item_label: 'Label'}">This is a p</p>
* @before $.meta.setType("class")
* @after $("#one").data().item_id == 1; $("#one")[0].item_label == "Label"
* @desc Reads metadata from the class attribute
*
* @example <p id="one" class="some_class" data="{item_id: 1, item_label: 'Label'}">This is a p</p>
* @before $.meta.setType("attr", "data")
* @after $("#one").data().item_id == 1; $("#one")[0].item_label == "Label"
* @desc Reads metadata from a "data" attribute
*
* @example <p id="one" class="some_class"><script>{item_id: 1, item_label: 'Label'}</script>This is a p</p>
* @before $.meta.setType("elem", "script")
* @after $("#one").data().item_id == 1; $("#one")[0].item_label == "Label"
* @desc Reads metadata from a nested script element
*
* @param String type The encoding type
* @param String name The name of the attribute to be used to get metadata (optional)
* @cat Plugins/Metadata
* @descr Sets the type of encoding to be used when loading metadata for the first time
* @type undefined
* @see data()
*/
(function($) {
// settings
$.meta = {
type: "class",
name: "data",
setType: function(type,name){
this.type = type;
this.name = name;
},
cre: /({.*})/,
single: 'data'
};
// reference to original setArray()
var setArray = $.fn.setArray;
// define new setArray()
$.fn.setArray = function(arr){
return setArray.apply( this, arguments ).each(function(){
if ( this.nodeType == 9 || $.isXMLDoc(this) || this.metaDone ) return;
var data = "{}";
if ( $.meta.type == "class" ) {
var m = $.meta.cre.exec( this.className );
if ( m )
data = m[1];
} else if ( $.meta.type == "elem" ) {
if( !this.getElementsByTagName ) return;
var e = this.getElementsByTagName($.meta.name);
if ( e.length )
data = $.trim(e[0].innerHTML);
} else if ( this.getAttribute != undefined ) {
var attr = this.getAttribute( $.meta.name );
if ( attr )
data = attr;
}
if ( !/^{/.test( data ) )
data = "{" + data + "}";
eval("data = " + data);
if ( $.meta.single )
this[ $.meta.single ] = data;
else
$.extend( this, data );
this.metaDone = true;
});
};
/**
* Returns the metadata object for the first member of the jQuery object.
*
* @name data
* @descr Returns element's metadata object
* @type jQuery
* @cat Plugins/Metadata
*/
$.fn.data = function(){
return this[0][$.meta.single || "data"];
};
})(jQuery);jquery.min.js
/*!
* jQuery JavaScript Library v1.4.1
* http://jquery.com/
*
* Copyright 2010, John Resig
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
* Includes Sizzle.js
* http://sizzlejs.com/
* Copyright 2010, The Dojo Foundation
* Released under the MIT, BSD, and GPL Licenses.
*
* Date: Mon Jan 25 19:43:33 2010 -0500
*/
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在此基础上确实可以解决跨域下隐藏真实URL时无法正常使用window.open问题（会弹出about:blank），但是在chrome和firefox以外不支持PDF预览的浏览器（疯狂暗示）仍不能正常显示。Safari等手机浏览器
PDF.JS闪亮登场
下载地址：https://mozilla.github.io/pdf.js/
viewer.html默认指向compressed.tracemonkey-pldi-09.pdf
屏蔽右键
<script type="text/javascript">
/*禁用右键*/
document.oncontextmenu = () => {
event.returnValue = false;
// 兼容ie
return false;
};
</script>隐藏打印/下载按钮
注意此处display: none若写为visibility:hidden则只会表面隐藏，实际仍占用空间。
隐藏真实链接
<script src="https://open.soarli.top/jquery/2.1.4/jquery-2.1.4.min.js"></script>
<script type="text/javascript">
function re(options) {
var url = options.attr("val");
window.open(url,"viewer");
}
</script><a href="javascript:;" onclick="re($(this))" val="https://xxx.com">《智能革命》</a>跨域问题(配置CORS）
在目标服务器 http://localhost:8081 新增下面头部（响应头）即可。
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, POST, PUT, OPTIONS
Access-Control-Expose-Headers: Accept-Ranges, Content-Encoding, Content-Length, Content-Rangenginx（其他服务器类似）：
location / {
add_header Access-Control-Allow-Origin '*';
add_header Access-Control-Allow-Methods 'GET, POST, PUT, OPTIONS';
add_header Access-Control-Expose-Headers 'Accept-Ranges, Content-Encoding, Content-Length, Content-Range';
}使用方法：
http://localhost/pdf.js/web/viewer.html?file=http://localhost:8081/demo.pdf以为这样就大功告成了吗？ 很遗憾，还是报了之前的错误
file origin does not match viewer's在viewer.js文件里搜索关键字 （file origin does not match），哈哈真的有 （本来就有的好吗）。
贴下关键代码, 在1863行左右：
{
var HOSTED_VIEWER_ORIGINS = ['null', 'http://mozilla.github.io', 'https://mozilla.github.io'];
validateFileURL = function validateFileURL(file) {
if (file === undefined) {
return;
}
try {
var viewerOrigin = new URL(window.location.href).origin || 'null';
if (HOSTED_VIEWER_ORIGINS.indexOf(viewerOrigin) >= 0) {
return;
}
var fileOrigin = new URL(file, window.location.href).origin;
if (fileOrigin !== viewerOrigin) {
throw new Error('file origin does not match viewer\'s');
}
} catch (ex) {
var message = ex && ex.message;
PDFViewerApplication.l10n.get('loading_error', null, 'An error occurred while loading the PDF.').then(function (loadingErrorMessage) {
PDFViewerApplication.error(loadingErrorMessage, { message: message });
});
throw ex;
}
};
}这里使用了try捕捉错误，注意第2个条件语句，因为当前源与目标源不一样，所以抛出了异常。
if (fileOrigin !== viewerOrigin) {
// throw new Error('file origin does not match viewer\'s');
}很好解决，只要把throw这行注释即可。 这就到此结束了，完美解决跨域问题。
在又拍云上，添加响应头的方法如下（借助边缘规则）：
到这里，问题完美解决~
6.20午更新：禁用Ctrl+S
发现按下Ctrl+S，PDF文件会被自动下载，为加强版权保护，进行如下操作：
找到pdf/web/viewer.js，注释掉其中两行。（不同版本所在行数可能不同，根据行数找不到时请根据内容搜索）
问题解决！
进阶
若对源文件保密性有相对更高的要求，可以按照如下方法做进一步的配置：
参考资料：
blog.csdn.net/xuexiaodong009/article/details/13297475
blog.csdn.net/qq_22823581/article/details/53462314
www.geek-share.com/detail/2754397278.html
blog.csdn.net/bianliuzhu/article/details/80622215
www.open-open.com/news/view/1fc3e18
blog.csdn.net/laizhouxiaoboge/article/details/59103951
www.xiejiahe.com/blog/detail/5be97f71df53a14006035e2a
help.upyun.com/knowledge-base/cdn-how-to-use-edgerules/
upyun-assets.b0.upaiyun.com/docs/cdn/edgerules/edgerules_rule_youxianji.png
www.jianshu.com/p/23eda8bd0396
www.cnblogs.com/andrezheng/p/9778198.html
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