Skip to content
Docs | Val Town

Blob Storage

Val Town comes with blob storage built-in. It allows for storing any data: text, JSON, images. You can access it via std/blob.

Blob storage is scoped globally to your account. If you set a blob in one val, you can retrieve it by the same key in another val. It’s backed by Cloudflare R2.

You may find this admin viewer helpful for viewing and editing your blobs.

Get JSON
Get JSON
import { blob } from "https://esm.town/v/std/blob";


let blobDemo = await blob.getJSON("myKey");
console.log(blobDemo); // returns `undefined` if not found
Set JSON
Set JSON
import { blob } from "https://esm.town/v/std/blob";


await blob.setJSON("myKey", { hello: "world" });
List keys
List Keys
import { blob } from "https://esm.town/v/std/blob";


let allKeys = await blob.list();
console.log(allKeys);


const appKeys = await blob.list("app_");
console.log(appKeys); // all keys that begin with `app_`
Delete by key
Delete
import { blob } from "https://esm.town/v/std/blob";


await blob.delete("myKey");

Examples

Error Handling

Utilities

Our Blob SDK also includes some utility functions to make working with blobs easier.

Copy
Copy
import { blob } from "https://esm.town/v/std/blob";


await blob.copy("myKey", "myKeyCopy");
Move
Move
import { blob } from "https://esm.town/v/std/blob";


await blob.move("myKey", "myKeyNew");

Lower-level API

We do provide access to the lower-level getter and setters, which are useful if you are storing non-JSON or binary data, need to stream in your response or request data, or do anything else lower-level.

  • async get(key: string): Retrieves a blob for a given key.
  • async set(key: string, value: string | BodyInit): Sets the blob value for a given key. See BodyInit.

Limitations

  • Blob-stored data counts towards your total Val Town storage – 10mb on the free plan and 1gb on pro. Check our pricing page to learn more.
  • Keys for blobs can be up to 512 characters long.
Fork it on