ipfs/kubo

Limit the size of files that IPFS will fetch from the P2P network.

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#2,759 opened on May 24, 2016

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help wantedkind/enhancementtopic/gateway

Description

The IPFS api is nice and simple, but can cause problems for people wanting to use it as a gateway to serve images. A request for the wrong hash could cause ipfsd to start fetching a ton of data that is not actually desired.

The solutions I have at the moment are to do ipfs file ls first and then fetch, but that requires me to set up my own middleware when it would be nice to have the daemon fetch it for me.

Contributor guide

Tech stack
go
Domain
backendperformanceapi
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
GoIPFSHTTP gateway
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Investigate the current file fetching mechanism in the IPFS daemon, specifically in the gateway handler (likely in `core/commands/` or `gateway/` directories). Review the `ipfs file ls` command to understand how to get file size before fetching. Consider implementing a flag like ` max size` in the `ipfs cat` or gateway endpoint to limit response size. Look at existing PRs or discussions for prior attempts.