Save a file in angular from a http response - angularjs

Question

I was wondering how I can save a file that is contained in a response from the server in angular ? (So that the file is automatically downloaded when the response arrives)
Edit :
I have a $http post method, and I get pdf data in the response. On success, I want to save the response data as a pdf file.
E. g :
$http({
method: 'POST',
url : 'theUrl',
data: //some array that is received
headers : //content type info
}
.success(function(response) { // I want to save the response as a pdf });

Answer 1

On angular 2... you can do:
import { saveAs } from 'browser-filesaver/FileSaver.js'
downloadFile(data: Response) {
var blob = new Blob([data], {type: 'application/x-tar'});
saveAs(blob, "report.tgz");
}

Answer 2

Using HTML5 FileSaver interface, this can be achieved:
https://github.com/eligrey/FileSaver.js/
Example solution:
//Call API to retrieve file stream using POST request
$http.post("URL", searchData, { responseType: 'arraybuffer' }).then(
response => {
//Download file from response
saveFileAs(response);
},
data => {
//raise error
}
);
function saveFileAs(response) {
var contentDisposition = response.headers("content-disposition");
//Retrieve file name from content-disposition
var fileName = contentDisposition.substr(contentDisposition.indexOf("filename=") + 9);
fileName = fileName.replace(/\"/g, "");
var contentType = response.headers("content-type");
var blob = new Blob([response.data], { type: contentType });
saveAs(blob, fileName);
}

Answer 3

You can't save the document as you don't have access to the users file system in a browser. You could send the URL of the pdf back, then trigger the browsers build in file save / open mechanism by adding a dummy iFrame to the body:
$http({
method: 'POST',
url : 'theUrl',
data: //some array that is received
headers : //content type info
}
.success(function (data) {
if ($('#iframe').length == 0) {
var $iframe = $('<iframe id="iframe" style="display: none"></iframe>');
$('body').append($iframe);
}
$('#iframe').attr('src', {{url to retrieve the file}})
})