Ndtyjky

This is my javascript code :

$('#downloadTraining').on('click', function () {

    $.get(restbase() + "/download-training/" + $('[name=trainingId]').val()).done(function(data) {

            }).fail(function(data) {

            errorAlert();

        }).always(function(data) {

    });

});

And this is my spring boot controller method :

@GetMapping("/r/download-training/{trainingId}")

public ResponseEntity<InputStreamResource> download(@PathVariable("trainingId") Integer trainingId) throws FileNotFoundException, JRException, IOException{

    File file = jasperReportService.createTrainingReport(trainingId);

    InputStreamResource resource = new InputStreamResource(new FileInputStream(file));  

    return ResponseEntity.ok()

                    // Content-Disposition

                    .header(HttpHeaders.CONTENT_DISPOSITION, "attachment;filename=" + file.getName())

                    // Content-Type

                    .contentType(MediaType.parseMediaType("application/octet-stream"))

                    // Contet-Length

                    .contentLength(file.length()) //

                    .body(resource);

}

Calling get method from javascript is working. Getting file is working. But it doesn't download file. Is there anything i need to add to javascript or error is in Java ?

Response and request headers : http://prntscr.com/lh01zx

I have a solution but I don't know if this is what you are expecting. Firstly I have never heard of sprint-boot before so sorry about that. But when it comes to downloading files with JavaScript I always use this method. This method downloads files with a blob and directly from the browser.

code:

//saving and downloading a file with a js blob;

function downloadFile(data, filename, type) {

    var file = new Blob([data], {type: type});

    if (window.navigator.msSaveOrOpenBlob) {

        window.navigator.msSaveOrOpenBlob(file, filename); //IE 10+

    } else {

        var a = document.createElement("a");

        var url = window.URL.createObjectURL(file);

        a.href = url;

        a.download = filename;

        document.body.appendChild(a);

        a.click();

        setTimeout(function() {

            document.body.removeChild(a);

            window.URL.revokeObjectURL(url);

        }, 0);

    }

}

I got this code from this question:
JavaScript: Create and save file