Fileupload functionality

gladguy · June 30, 2021, 5:06am

Wondering, about large file upload to canister.

How we can achieve file uploading of size 4 MB ? Is there any tutorial or help available

Appreciating much for your time and effort to reply to this thread
Thanks a lot

claudio · June 30, 2021, 1:13pm

I’m not aware of a small, self contained example but the CanCan TikTok clone would up and download larger video files in chunks:

(Search for Chunk in here:)

github.com

dfinity/cancan/blob/main/service/CanCan.mo

import Access "../backend/Access";
import Array "mo:base/Array";
import Hash "mo:base/Hash";
import Base "../backend/Base";
import Buffer "mo:base/Buffer";
import Debug "mo:base/Debug";
import Demo "../backend/Demo";
import DemoCan30 "Demo/Can30_VideoRecommendations";
import DemoCan32 "Demo/Can32_ViralEvent";
import HashMap "mo:base/HashMap";
import Int "mo:base/Int";
import Iter "mo:base/Iter";
import List "mo:base/List";
import Nat "mo:base/Nat";
import Option "mo:base/Option";
import P "mo:base/Prelude";
import Param "../backend/Param";
import Prelude "mo:base/Prelude";
import Principal "mo:base/Principal";
import Rel "../backend/Rel";

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Maybe someone knows of a smaller example…

kpeacock · June 30, 2021, 2:09pm

The asset canister itself works this way, but the SDK team is actively working on readymade solutions to drop asset management into a custom canister. We’ll have something for you before long

jzxchiang · June 30, 2021, 6:05pm

Awesome. One limitation with the asset canister is that the assets need to known at canister build time (as opposed to dynamically uploading user-provided assets), I believe.

kpeacock · June 30, 2021, 6:39pm

Technically not! The method runs after the canister wasm has already been installed, and it’s more of a permissions issue to upload with user content

gladguy · July 1, 2021, 4:07am

Thanks alot guys ! I will look into CanCan.

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Fileupload functionality

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