PDFObject 在浏览器中无法正确显示

Question

我正在尝试使用 PDFObject 渲染嵌入的 pdf 文件。在后端，我按如下方式发送pdf

fs.readFile(uploadFileFd, function (err,data){
res.contentType("application/pdf");
res.send(data);
});

之后我在前面得到如下响应

$.get("/loadDocument",function(data){
PDFObject.embed(data,"#test");
});

我得到以下结果 在 PDF 浏览器中呈现的图像

你知道怎么解决吗？

Answer 1

我发现问题是 pdf 文件的编码，所以我在后端使用"base64-stream"将文件编码为 base64：

var readStream = fs.createReadStream(uploadFileFd);
// This will wait until we know the readable stream is actually valid before piping
readStream.on('open', function () {
// This just pipes the read stream to the response object (which goes to the client)
readStream.pipe(new Base64Encode()).pipe(res);
});
// This catches any errors that happen while creating the readable stream (usually invalid names)
readStream.on('error', function(err) {
res.end(err);
});

之后，我使用嵌入标签来显示pdf：

var newElement = "<embed src=data:application/pdf;base64,"+data+" id='pdf' width='100%' height='1200'>";

Answer 2

它似乎以二进制格式出现，因此您需要再次将其转换为pdf以在浏览器上呈现。

var request = new XMLHttpRequest();
request.open("GET", "/path/to/pdf", true); 
request.responseType = "blob";
request.onload = function (e) {
if (this.status === 200) {
// `blob` response
console.log(this.response);
// create `objectURL` of `this.response` : `.pdf` as `Blob`
var file = window.URL.createObjectURL(this.response);
var a = document.createElement("a");
a.href = file;
a.download = this.response.name || "detailPDF";
document.body.appendChild(a);
a.click();
// remove `a` following `Save As` dialog, 
// `window` regains `focus`
window.onfocus = function () {                     
document.body.removeChild(a)
}
};
};
request.send();

请尝试上述操作。