WEEK 9 & 10 QUESTIONS | May 31 - June 13, 2021

[Discordian]

WEEK 9 & 10 QUESTIONS | May 31 - June 13, 2021 (times are in EST)

This is a rollup for weeks 9 & 10! I’ve attempted to highlight interesting or common questions. I’ve also connected these items to either their direct solution, or a related issue on Github. This will be how these reports will be formatted from now on . There’s a fair amount of content buried in here, I hope you enjoy!

Questions, Items, and Issues

js-ipfs dht.findProvs: TypeError: key.toBaseEncodedString is not a function (js-ipfs#3502)

I’ve noticed at least a couple users ran into this issue:

• javascript - Js-IPFS Error: cid.toBaseEncodedString() is not a function - Stack Overflow
• Does anyone know if it is possible to “findProvs” with js-ipfs in the browser? The goal would be to know how many peers there are for a cid

Observation:

Currently the issue related to this is closed. I’m pretty sure it’s recommended to stay away from using DHT in js-ipfs for the time being .

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Adam Faturahman asked on StackOverflow: UnhandledPromiseRejectionWarning: InvalidRepoVersionError: Incompatible repo versions. (IPFS-JS 0.55.3)-(NODE JS 14.17.0) (js-ipfs#3717)

UnhandledPromiseRejectionWarning: InvalidRepoVersionError: Incompatible repo versions. Automatic migrations disabled. Please migrate the repo manually.

Observation:

I’ve personally run into a corrupted repo. This appears to be a migration issue, not sure why. The easiest solution to me seems to be a feature that allows the developer to programmatically re-initialise a repo, or delete it. I’d love to hear more thoughts on this!

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How do I get peers using js-ipfs in the browser? (Create a simple chat app)

I noticed at least 3 questions in this period possibly asking something along these lines (though I lost a link due to a room migration):

• Pubsub peers connected but not receiving messages - StackOverflow
• When i am uploading a file on ipfs and then using its hash and opening in another tab its not opening.Can anyone help me to solve this issue?

Observation:

I linked “Create a simple chat app” above, a new docs page explaining how to discover and communicate with peers using js-ipfs in the browser.

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Fayne Aldan asked in #ipfs: Does anyone know what I’d do if I want to host a gateway? (ipfs-docs#788)

I believe this question was actually featured in the last rollup, but now it has an issue attached .

Observation:

Now there’s an issue open to get a nice doc explaining how to setup your very own gateway! Just in case though, I’m going to quote my previous answer too:

You actually get the gateway from your very own local gateway! You might have noticed you can access your own local gateway with URLs like http://ipfs.io.ipns.localhost:8080. Well, it’s actually that very gateway that you’d configure and use! To enable SSL, you simply use Nginx as a reverse proxy, and there are plenty of guides online about how to do that. Using Nginx, you can also give your gateway a publicly accessible address but be warned, there’s no telling how popular your public gateway might get, and consume all your bandwidth .

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nickreserved asked on the forums: Download stopped (go-ipfs#8192)

@nickreserved

I share some content between my friends.
To be -the content- more fast for download, I am trying to upload it in one more computer behing different internet aDSL connection.

So, I run on second computer the following commands

ipfs daemon
ipfs swarm connect /ip4/10.0.0.2/tcp/4001/p2p/12D3Koo…
ipfs get /ipns/k51qzi5…

But always the download stucks.
Last time it stucks on 1.6GB of 28GB

(Both computers are in the same VPN layer 2, so the ip 10.0.0.2)

What diagnostic will be useful to understand the problem?

Observation:

I would have imagined the blocks would be downloaded in the background after the failure, as they’re available anyways. I’m unsure if this mechanism actually exists though, so I filed the linked issue above . If anyone has more insight on what’s going on, your input would be greatly appreciated.

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Discordian asked on the forums: How do I get peer’s IP when using Nginx reverse proxy? (go-ipfs#8193)

@Discordian

Hey, currently all peers using my reverse proxy appear as 127.0.0.1 . I’m setting up fail2ban jails for certain behaviours, but this totally prevents me from accurately finding their IP. I’m using Nginx as a reverse proxy, and here’s my config:

map $http_upgrade $connection_upgrade {
	default upgrade;
	'' close;
}

upstream websocket {
	server 127.0.0.1:4011;
}

map $remote_addr $proxy_forwarded_elem {
	# IPv4 addresses can be sent as-is
	~^[0-9.]+$          "for=$remote_addr";

	# IPv6 addresses need to be bracketed and quoted
	~^[0-9A-Fa-f:.]+$   "for=\"[$remote_addr]\"";

	# Unix domain socket names cannot be represented in RFC 7239 syntax
	default             "for=unknown";
}

map $http_forwarded $proxy_add_forwarded {
	# If the incoming Forwarded header is syntactically valid, append to it
	"~^(,[ \\t]*)*([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?(;([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?)*([ \\t]*,([ \\t]*([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?(;([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?)*)?)*$" "$http_forwarded, $proxy_forwarded_elem";

	# Otherwise, replace it
	default "$proxy_forwarded_elem";
}

server {
	listen 4430 ssl;
	ssl_certificate /etc/letsencrypt/live/ipfs.thedisco.zone/fullchain.pem; # managed by Certbot
	ssl_certificate_key /etc/letsencrypt/live/ipfs.thedisco.zone/privkey.pem; # managed by Certbot
	include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
	ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
	location / {
		proxy_set_header Forwarded $proxy_add_forwarded;

		proxy_set_header X-Real-IP $remote_addr;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

		proxy_pass http://websocket;
		proxy_http_version 1.1;
		proxy_set_header Upgrade $http_upgrade;
		proxy_set_header Connection $connection_upgrade;
		proxy_set_header Host $host;
	}
}

Does go-ipfs look at these headers at all? Is there a better way?

Observation:

It’s me! I’ve been quite stumped on this issue. This is one where I’d personally love some ideas .