After spending hours trying to download a zip file using Angular, I encountered an issue where the downloaded file was smaller than the original. I followed guidance from this link on downloading files with Angular2.
I opted not to use the <a> tag directly for security reasons.
service
downloadFile(filePath: string){
return this.http
.get( URL_API_REST + 'downloadMaj?filePath='+ filePath)
.map(res => new Blob([res], {type: 'application/zip'}))
}
component
downloadFileComponent(filePath: string){
this.appService.downloadFile(filePath)
.subscribe(data => this.getZipFile(data)),
error => console.log("Error downloading the file."),
() => console.log('Completed file download.');
}
getZipFile(data: any){
var a: any = document.createElement("a");
document.body.appendChild(a);
a.style = "display: none";
var blob = new Blob([data], { type: 'application/zip' });
var url= window.URL.createObjectURL(blob);
a.href = url;
a.download = "test.zip";
a.click();
window.URL.revokeObjectURL(url);
}
rest api
public void downloadMaj(@RequestParam(value = "filePath") String filePath, HttpServletResponse response) {
System.out.println("downloadMaj");
File fichierZip = new File(filePath);
try {
System.out.println("nom du fichier:" + fichierZip.getName());
InputStream inputStream = new FileInputStream(fichierZip);
response.addHeader("Content-Disposition", "attachment; filename="+fichierZip.getName());
response.setHeader("Content-Type", "application/octet-stream");
org.apache.commons.io.IOUtils.copy(inputStream, response.getOutputStream());
response.getOutputStream().flush();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
Can anyone shed light on why the entire file is not being downloaded?
Solved
downloadFile(filePath: string) {
return this.http
.get( URL_API_REST + 'download?filePath=' + filePath, {responseType: ResponseContentType.ArrayBuffer})
.map(res => res)
}
private getZipFile(data: any) {
const blob = new Blob([data['_body']], { type: 'application/zip' });
const a: any = document.createElement('a');
document.body.appendChild(a);
a.style = 'display: none';
const url = window.URL.createObjectURL(blob);
a.href = url;
a.download = test.zip;
a.click();
window.URL.revokeObjectURL(url);
}