Dart - bucket.file.getDownloadUrl()

Create a download url for a file within a bucket.

import 'package:nitric_sdk/nitric.dart';

final assets = Nitric.bucket("assets").allow([
  BucketPermission.read,
]);

final logo = assets.file("images/logo.png");

// Create a read-only url reference for downloading
final downloadUrl = await logo.getDownloadUrl();

Parameters

Name
expiry
Optional
Optional
Type
int
Description
Seconds until link expiry. Defaults to 600, Maximum of 604800 (7 days).

Examples

Create a readable link that is valid for the next 5 minutes

import 'package:nitric_sdk/nitric.dart';

final assets = Nitric.bucket("assets").allow([
  BucketPermission.read,
]);

final logo = assets.file("images/logo.png");

// Create a read-only url reference for downloading
final downloadUrl = await logo.getDownloadUrl(expiry: 300);

Redirect response to an image URL

import 'package:nitric_sdk/nitric.dart';

final mainApi = Nitric.api("main");
final images = Nitric.bucket("assets").allow([
  BucketPermission.read,
]);

mainApi.get("/images/:id", (ctx) async {
  final id = ctx.req.pathParams["id"]!;

  final signedUrl = await images.file(id).getDownloadUrl();

  ctx.res.status = 303;
  ctx.res.headers["Location"] = [signedUrl];

  return ctx;
});

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Last updated on Nov 8, 2024