I am developing hybrid mobile application.
In one of the scenario we need to fetch mimeType from a file when we select or upload a file.
I am using apache FileTransfer.
window.resolveLocalFileSystemURL(fileURI , resolveOnSuccess, resolveOnFail)
you can get it from cordova File plugin.
$cordovaFile.checkFile(uri, '')
.then(function(entry) {
// success
var name = entry.name;
entry.file(function(data) {
// get mime type
var mime = data.type;
alert(mime);
})
}, function(error) {
// error
// show toast
});
I got it working like this in TypeScript and Angular 2:
this._File.resolveLocalFilesystemUrl(somefileUri).then((entry: Entry) => {
if (entry) {
var fileEntry = entry as FileEntry;
fileEntry.file(success => {
var mimeType = success.type;
}, error => {
// no mime type found;
});
}
});
file-transfer
does not expose mimeType and other FileUploadOptions params.
Mimetype autodetection is only supported for uploads in Windows plugin code .
And here is a Jira ticket for this feature CB-5946 - it also has some suggestions on Android implementation.
In Angular 2 I use this:
export class Plugins {
albums = {
open () : Promise<any> {
return ImagePicker.getPictures({
quality: 100,
maximumImagesCount: 1,
}).then((imgUrls) => {
return imgUrls;
}, (err) => {
if(err.error == "cordova_not_available") {
alert("Cordova is not available, please make sure you have your app deployed on a simulator or device");
} else {
console.log("Failed to open albums: " + err.error);
}
});
},
}
...
@Component({
templateUrl: 'build/pages/home/home.html',
directives: [UploadButton]
})
export class HomePage implements OnInit {
openAlbums = (): void => {
var $self = this;
this._plugins.albums.open().then((imgUrls) => {
imgUrls.forEach((imageUrl: string): void => {
if (imageUrl) {
window.resolveLocalFileSystemURL(imageUrl, function (entry: FileEntry) {
entry.file(file=> {
console.log('mimeType', file.type);
}, ((error:FileError) => console.log(error)));
});
}
});
}); };
resolveLocalFileSystemURL
gives back through the success callback an Entry
which I had to cast to FileEntry
to get access to the file method which gives back a File
which extends Blob
that has the mime type property.
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