pdf.js主要包含两个库文件，一个pdf.js和一个pdf.worker.js，，一个负责API解析，一个负责核心解析
官网地址：http://mozilla.github.io/pdf.js/
- 下载pdf.js插件
- 解压后有 web 和 build 两个文件夹 如图
- 运行示例 将解压后的文件直接仍到项目路径下
访问 ip:port/文件夹名称/web/viewer.html
显示的是 web 文件夹下的compressed.tracemonkey-pldi-09.pdf
- 修改默认打开PDF
我们只用修改viewer.js文件中的pdf路径参数即可：
var DEFAULT_URL = ‘09.pdf’;
如果pdf文件与viewer.html不在一层目录中，改成相对路径即可：
var DEFAULT_URL = ’ ../doc/ 09.pdf’;
viewer.html可以通过页面参数传值的方式加载pdf文件，比如我们想打开09.pdf文件的话，只需要这样：
先把viewer.js中的参数修改为空：
var DEFAULT_URL = ”;
然后把url改写为参数传值：
http://127.0.0.1:8080/pdfjs/web/viewer.html?file=09.pdf
如果pdf文件与viewer.html不在一层目录中，改成相对路径即可：
http://127.0.0.1:8080/pdfjs/web/viewer.html?file=../doc/09.pdf
参考地址https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions#file
- 获取服务器上的PDF文件
通过页面参数传值的方式加载pdf文件
file的值需要URLEncode编码 指向服务器端
例如：
http://xxxxx.com:89/demo/fileupdownfud=1&rid=4&isweb=1&iswebshow=1&dbid=01&filepath=fj_ob_item/Y201809/11.pdf
URLEncode编码：为
http%3A%2F%2Fxxxx.com%3A89%2Fdemo%2Ffileupdown%3Ffud%3D1%26rid%3D4%26isweb%3D1%26iswebshow%3D1%26dbid%3D01%26filepath%3Dfj_ob_item%2FY201809%2F11.pdf
访问地址为：
http://127.0.0.1:8080/pdfjs/web/viewer.html?file=http%3A%2F%2Fxxxx.com%3A89%2Fdemo%2Ffileupdown%3Ffud%3D1%26rid%3D4%26isweb%3D1%26iswebshow%3D1%26dbid%3D01%26filepath%3Dfj_ob_item%2FY201809%2F11.pdf
————————————————
版权声明：本文为CSDN博主「三年二班Pit」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/l_ai_yi/article/details/82388497
PDF.js默认好像是不能跨域请求
将viewer.js 中的错误提示注释掉即可
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;
//跨域请求错误提示
//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;
}
- 服务端代码
//跨域请求
String s0 = "C:11.pdf"
response.setHeader("Access-Control-Allow-Origin", "*");
File file = new File(s0);
response.setContentLength((int) file.length());
response.setHeader( "Content-Disposition", "attachment;filename=" + URLEncoder.encode(file.getName(), "UTF-8"));// 设置在下载框默认显示的文件名
response.setContentType("application/octet-stream");// 指明response的返回对象是文件流
// 读出文件到response
// 这里是先需要把要把文件内容先读到缓冲区
// 再把缓冲区的内容写到response的输出流供用户下载
FileInputStream fileInputStream = new FileInputStream(file);
BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
OutputStream outputStream = response.getOutputStream();
byte buffer[] = new byte[];
int len = ;
while ((len = bufferedInputStream.read(buffer)) > ) {
outputStream.write(buffer, , len);
}
// 人走带门
bufferedInputStream.close();
outputStream.flush();
outputStream.close();
案例二：
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>testPdf</title>
<script src="~/Scripts/jquery-1.8.2.min.js"></script>
<script src="~/pdfjs2/build/pdf.js"></script>
<style type="text/css">
.lightbox {
position: fixed;
top: 0px;
left: 0px;
height: 100%;
width: 100%;
z-index: 7;
opacity: 0.3;
display: block;
background-color: rgb(0, 0, 0);
display: none;
}
.pop, iframe {
position: absolute;
left: 50%;
top: 0;
width: 893px;
height: 100%;
margin-left: -446.5px;
z-index: 9;
}
</style>
<script type="text/javascript">
function showPdf(isShow) {
var state = "";
if (isShow) {
state = "block";
} else {
state = "none";
}
var pop = document.getElementById("pop");
pop.style.display = state;
var lightbox = document.getElementById("lightbox");
lightbox.style.display = state;
}
function close() {
showPdf(false);
}
function pd(dd) {
$("#" + dd)[0].contentWindow.print();
}
</script>
</head>
<body>
<ul>
<li><a href="../pdfjs2/web/viewer.html?file=../DownFile/430000447746159F19030038催缴通知书.pdf" target="pdfContainer" onclick="showPdf(true)">0001_pdf</a></li>
<li><a href="../pdfjs2/web/viewer.html?name=../DownFile/430000447746159F19030038事前告知书.pdf" target="pdfContainer" onclick="showPdf(true)">0002_pdf</a></li>
</ul>
<div class="lightbox" id="lightbox"></div>
<div id="pop" class="pop" style="display: none;">
<a href="javascript:close()" style="
position: absolute;
right: -90px;
display: inline-block;
width: 80px;
height: 30px;
" id="close">关闭</a>
@*<a href="#" onclick="pd('pdfContainer')" style="
position:absolute;
right :-90px;
display :inline-block;
width :80px;
height: 30px;">打印</a>*@
<iframe src="" frameborder="0" id="pdfContainer" name="pdfContainer"></iframe>
</div>
</body>
</html>
案例三：
直接使用iframe
<iframe id="pdf_page_1" name="pdf_page" style="width:795px;height:789px" frameborder="0" ></iframe>
赋值显示：
param = "chId=" + $("#chId").val() + "&unitId=" + unId;
pdfurl = "/OverrunPunishment/ApprovedBookData?" + param;
//pdfurl为文件流，使用encodeURIComponent()函数可把字符串作为 URI 组件进行编码。
$("#pdf_page_1").attr('src', "../pdfjs/web/viewer.html?file=" + encodeURIComponent(pdfurl) + "");
后台将pdf文档转文件流方法：
public string ApprovedBookData(string chId, string unitId)
{
InstrumentInfo instr = new InstrumentInfo();
string name = "";
FileStream fs = null;
if (Request.Cookies["LoginValue"] == null) Response.Redirect("../Login/LoginPage");
try
{
instr = ApprovedDataUtil.ExportPdfText(chId, unitId);
string path = instr.fileName.Replace("\\", "/");
fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);//读取生成的pdf文件
byte[] buffer = new byte[fs.Length];
fs.Position = ;
fs.Read(buffer, , (int)fs.Length);
Response.Clear();
Response.AddHeader("Content-Length", fs.Length.ToString());
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "inline;FileName=抄告文书.pdf"); Response.BinaryWrite(buffer);
Response.OutputStream.Flush();
Response.OutputStream.Close();
name = fs.Name;
fs.Close();
}
catch (Exception ex)
{
CSysCfg.WriteLog("获取文书异常：" + ex.Message);
}
return name;
}
注：获取流时，需要用encodeURIComponent将url转换成encode编码，放在file里。