I want to download a pdf file for jquery ajax response. Ajax response contains pdf file data. I tried this solution. My code is given below but I always get a blank pdf.
$(document).on('click', '.download-ss-btn', function () {
$.ajax({
type: "POST",
url: 'http://127.0.0.1:8080/utils/json/pdfGen',
data: {
data: JSON.stringify(jsonData)
}
}).done(function (data) {
var blob = new Blob([data]);
var link = document.createElement('a');
link.href = window.URL.createObjectURL(blob);
link.download = "Sample.pdf";
link.click();
});
});
This question is related to
javascript
jquery
ajax
pdf
You can do this with html5 very easily:
var link = document.createElement('a');
link.href = "/WWW/test.pdf";
link.download = "file_" + new Date() + ".pdf";
link.click();
link.remove()
I am newbie and most of the code is from google search. I got my pdf download working with the code below (trial and error play). Thank you for code tips (xhrFields) above.
$.ajax({
cache: false,
type: 'POST',
url: 'yourURL',
contentType: false,
processData: false,
data: yourdata,
//xhrFields is what did the trick to read the blob to pdf
xhrFields: {
responseType: 'blob'
},
success: function (response, status, xhr) {
var filename = "";
var disposition = xhr.getResponseHeader('Content-Disposition');
if (disposition) {
var filenameRegex = /filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/;
var matches = filenameRegex.exec(disposition);
if (matches !== null && matches[1]) filename = matches[1].replace(/['"]/g, '');
}
var linkelem = document.createElement('a');
try {
var blob = new Blob([response], { type: 'application/octet-stream' });
if (typeof window.navigator.msSaveBlob !== 'undefined') {
// IE workaround for "HTML7007: One or more blob URLs were revoked by closing the blob for which they were created. These URLs will no longer resolve as the data backing the URL has been freed."
window.navigator.msSaveBlob(blob, filename);
} else {
var URL = window.URL || window.webkitURL;
var downloadUrl = URL.createObjectURL(blob);
if (filename) {
// use HTML5 a[download] attribute to specify filename
var a = document.createElement("a");
// safari doesn't support this yet
if (typeof a.download === 'undefined') {
window.location = downloadUrl;
} else {
a.href = downloadUrl;
a.download = filename;
document.body.appendChild(a);
a.target = "_blank";
a.click();
}
} else {
window.location = downloadUrl;
}
}
} catch (ex) {
console.log(ex);
}
}
});
For those looking a more modern approach, you can use the fetch API
. The following example shows how to download a PDF
file. It is easily done with the following code.
fetch(url, {
body: JSON.stringify(data),
method: 'POST',
headers: {
'Content-Type': 'application/json; charset=utf-8'
},
})
.then(response => response.blob())
.then(response => {
const blob = new Blob([response], {type: 'application/pdf'});
const downloadUrl = URL.createObjectURL(blob);
const a = document.createElement("a");
a.href = downloadUrl;
a.download = "file.pdf";
document.body.appendChild(a);
a.click();
})
I believe this approach to be much easier to understand than other XMLHttpRequest
solutions. Also, it has a similar syntax to the jQuery
approach, without the need to add any additional libraries.
Of course, I would advise checking to which browser you are developing, since this new approach won't work on IE. You can find the full browser compatibility list on the following [link][1].
Important: In this example I am sending a JSON request to a server listening on the given url
. This url
must be set, on my example I am assuming you know this part. Also, consider the headers needed for your request to work. Since I am sending a JSON, I must add the Content-Type
header and set it to application/json; charset=utf-8
, as to let the server know the type of request it will receive.
Source: Stackoverflow.com