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IPFSのハッシュを自動的に収集できるのではないかということに気がついた。 スイカネットを流れるデータを拾って集める横浜駅SFのワンシーンを思い出してテンションが上がった。

ログを見る

ipfs log tail でイベントのログを見ることができる。 どのイベントが何を意味するのか、ドキュメントは見つけられなかった。

$ ipfs log tail
{"event":"updatePeer","peerID":"QmZY7MtK8ZbG1suwrxc7xEYZ2hQLf1dAWPRHhjxC8rjq8E","session":"8e57bece-9c9d-400f-b0ff-ab616dcdfe91","system":"dht","time":"2017-11-10T06:44:33.049612976Z"}
{"event":"handleFindPeerBegin","peerID":"QmZY7MtK8ZbG1suwrxc7xEYZ2hQLf1dAWPRHhjxC8rjq8E","session":"8e57bece-9c9d-400f-b0ff-ab616dcdfe91","system":"dht","time":"2017-11-10T06:44:33.049723954Z"}
{"duration":1341286,"event":"handleFindPeer","peerID":"QmZY7MtK8ZbG1suwrxc7xEYZ2hQLf1dAWPRHhjxC8rjq8E","session":"8e57bece-9c9d-400f-b0ff-ab616dcdfe91","system":"dht","time":"2017-11-10T06:44:33.051066612Z"}
{"event":"updatePeer","peerID":"QmUpKSoobhgcdLcR3rgusnPyRiRg2GCjuE4ekb79vhaLdK","session":"8e57bece-9c9d-400f-b0ff-ab616dcdfe91","system":"dht","time":"2017-11-10T06:44:36.674229585Z"}
{"event":"handleFindPeerBegin","peerID":"QmUpKSoobhgcdLcR3rgusnPyRiRg2GCjuE4ekb79vhaLdK","session":"8e57bece-9c9d-400f-b0ff-ab616dcdfe91","system":"dht","time":"2017-11-10T06:44:36.674340168Z"}
{"duration":1351836,"event":"handleFindPeer","peerID":"QmUpKSoobhgcdLcR3rgusnPyRiRg2GCjuE4ekb79vhaLdK","session":"8e57bece-9c9d-400f-b0ff-ab616dcdfe91","system":"dht","time":"2017-11-10T06:44:36.675678763Z"}
{"duration":8996677675,"error":"no route to host","event":"tptDialReusePort","raddr":{},"system":"tcp-tpt","time":"2017-11-10T06:44:37.322662561Z"}
{"duration":8996323673,"error":"no route to host","event":"tptDialReusePort","raddr":{},"system":"tcp-tpt","time":"2017-11-10T06:44:37.322712121Z"}
{"duration":8996400695,"error":"no route to host","event":"tptDialReusePort","raddr":{},"system":"tcp-tpt","time":"2017-11-10T06:44:37.322749876Z"}
{"duration":9000177945,"error":"no route to host","event":"tptDialReusePort","raddr":{},"system":"tcp-tpt","time":"2017-11-10T06:44:37.326684296Z"}
{"duration":9000218920,"error":"no route to host","event":"tptDialReusePort","raddr":{},"system":"tcp-tpt","time":"2017-11-10T06:44:37.32671394Z"}
...

イベント名を抽出してみる。

$ ipfs log tail | jq ".event" | awk '!colname[$1]++{print $1}'
"updatePeer"
"handleFindPeerBegin"
"handleFindPeer"
"Bitswap.Rebroadcast.idle"
"handleAddProviderBegin"
"handleAddProvider"
"tptDialReusePort"
"connDial"
"swarmDialDo"
"swarmDialBackoffAdd"
"swarmDialAttemptStart"
"swarmDialAttemptSync"
"getClosestPeers"
"swarmDialAttemptSyncBegin"
"dhtSentMessage"
"swarmDialAttemptStartBegin"
"swarmDialDoBegin"
"interfaceListenAddresses"
"provide"
"provideBegin"
"getClosestPeersBegin"
"findPeerSingleBegin"
"dhtReceivedMessage"
"findPeerSingle"
"connDialBegin"
"tptDialReusePortBegin"
"connLifetime"
"handleGetProvidersBegin"
"handleGetProviders"
"connDialZeroAddr"
"handleGetValueBegin"
"handleGetValue"
"swarmDialBackoff"
"connLifetimeBegin"
"secureHandshakeBegin"
"secureHandshake"
"swarmDialDoSetupBegin"
"swarmDialDoSetup"
"swarmDialBackoffClear"
"periodicBootstrapBegin"
"bootstrapSkip"
"periodicBootstrap"

このうちhandleGetProvidersというイベントは 「誰かがipfs dht findprovしたか、ゲートウェイ等で自動的に呼ばれたかで、ハッシュと対応したコンテンツを持っていないかを他のノードが聞いてきた」 という意味のイベント(だと思う)。 つまり、このイベントをキャッチすれば誰かがアクセスしようとしたハッシュを収集できる。

$ ipfs log tail | grep '"handleGetProviders"' -m 1 --line-buffered | jq
{
  "duration": 2045973,
  "event": "handleGetProviders",
  "key": "QmXLjNdoUETwAi8bErpc73FQEESTovBscu5XaC2wnpgfpY",
  "peer": "QmX9Nhr56k7K2JBQbu9JBpF2s1AQk8WpmZc6v4sqZERMRu",
  "session": "8e57bece-9c9d-400f-b0ff-ab616dcdfe91",
  "system": "dht",
  "time": "2017-11-10T06:56:50.517580514Z"
}

keyが、誰かが探そうとしているハッシュだと思う。 とりあえず200件ほど集めてみる。 それなりに時間がかかる。

$ ipfs log tail | grep '"handleGetProviders"' -m 200 --line-buffered | jq ".key" -r --unbuffered >> hashes.txt
$ cat hashes.txt 
Qmd38FX6orV498CN1Z17997R26jZUwgicb1GXZ2kp9kAmq
QmW9zpbtUnym5MrZFTqx1gqcRPBn7LYsQmYjGF6go3MKNy
QmXfUy6oCwYNaU87rN9vprMqL9soaBWvZqkTkjyKfCvgBE
QmdaM5GdH8a3YAXJfxeLNWX5MRvZ6nPtXLfqBx27kmaPU4
QmTawgaWc5mbFXb1YsG3USSvGyERwD4YW38HmmqzvutxWQ
QmaUYFPjZE4Zttrd8bWUH5aXchWSNZsCdb9aXH4zMpjreL
QmVU78LkGcNCWJiHKQTjkbXei4KXA5GhPb3ZJt4ET9pVmh
QmTPYx6QsCcGjd1BRR55kJWAcEaAv1ypG5DpegRciC2VS9
QmTfMqZsa2GzY1qyZ9H3s246qTbXZQfXkkb5xv7wVtzMV4
QmXypqdjrHvQY5ePn4jbAdymG6ij9FMcQu5qMwhgk8xeqE
QmV8Emsju7VDsKYURQPFKkF3YqDDwgJ2nfxvEGU8hRa73r
QmVGKFVHJM3Vfg8kF1vHpYnryPpPo4d8ei84adMFTgRB7X
QmXypqdjrHvQY5ePn4jbAdymG6ij9FMcQu5qMwhgk8xeqE
Qmc4vcxmMMZDj5sq67exuMtmHbYiKWZdwYSzJ6XtW41pYU
zb2rhhBBo75RS1WjAjsDsne3H1dvqcGkFmmtRRPDta57NMH5T
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zb2rhkNQ9F9aimY19GTqUTkAy5c2AV3yzgLrKrAYnF7pgsSKv
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QmNz9xKc5qN5y19BeG8eU1ybkrcNxsvkenW2JviUQcgapV
QmPTRT53jbt38gPBwRgo9fG7MaNa2wZ1vSUiio9qRcpCpJ
QmNz9xKc5qN5y19BeG8eU1ybkrcNxsvkenW2JviUQcgapV
QmeymSWhV4uymKB3QaBYYXTPVigBmsS6qcViMZVSwsmiHZ
QmfAPkmscpcULVL5EBXaMcPQA5rM9zbjpnjQn3fyergSq5
QmZkSpqxiViGKrf1pCMVoVFJU7rvzoaYya96ZyFt7SatKL
QmeYnPaUaAVWCHueTW2M2LdhmpBXpBXTPq85Rtpr6JiM5o
QmbVePcoHDiZLiPcsJmG96ViJcxDE2z4se1Tc4K4STgNTT
QmXypqdjrHvQY5ePn4jbAdymG6ij9FMcQu5qMwhgk8xeqE
Qmf9Aqp3WwzxcHpJNi8zafEfRs9ze3rBhSu3EQZB1PBQ6d
QmX1dCic7XsBPjR6q5hK7PDiLbnDUzJZFUgNcjpyfPvZ9w
QmeiHXMB7eDNkkG3YSJADP3vPJBYju7y29tvQx62VScxiS
QmRiJNrL5TjkyydhJAGWW9jAf38CgwZkhs3MmciLnjDc3k
QmPyy4TpXcHgv9JCMGxtdcvNnDrj1VFXcT82ZWTJNVnh1Y
QmTimP9SxACuysybbAoM2aPVJRYxcsd7rgCM4QF9Ri3Ex7
QmXypqdjrHvQY5ePn4jbAdymG6ij9FMcQu5qMwhgk8xeqE
QmcRZnY13MM45VJhx5JtKsYSxuZCJVWzUawNG7HSjPuPkR
zb2rhYM79n5DCyojxo2MUfuLS3rLd1hh9KB6PSsYLfci8BRjs
Qmf9Aqp3WwzxcHpJNi8zafEfRs9ze3rBhSu3EQZB1PBQ6d
QmQMZb2AS8ssnKhDz2cUbwvvwAA66w3jEuod58zRaW19xJ
QmXypqdjrHvQY5ePn4jbAdymG6ij9FMcQu5qMwhgk8xeqE
QmXypqdjrHvQY5ePn4jbAdymG6ij9FMcQu5qMwhgk8xeqE
QmRDHEjXnnR79hMS2yNsgVPYmnrT695zJdRBjFLYHkZN2x
Qma8KT2c7GaQT82BZGgZGtn4deD5gFtFd5FLfBytt15q8W
QmZTT6JS1hLhqupREUb8dwcRUkSaion4SE7F8aCGGdfSxy
Qmf2rBnUYQjazKzv7gfbirTKS6cZR192koJErNpauaJNFj
QmZ6RcsQbfpjYG5eKLFged2oUQKDVwQyE9Rzvsj4oVRKbK
QmZop9gkPTQJCr8RYDtoxzVc8okiMJRLtEVueZqTLW4G64
QmT1xRnP52NjAT1JCXwfvMyjiidZ1CCtzBQxeXFz2XCKjA
QmRKQjaybXLfnfcoDEGGfzcNa7qULQZcuVagVhHP2TjveX
QmRBD7YZYdLPCvZdn8xQF3G8czkSbw3AET7WwFbMXs8SSW

このなかでアクセスできるハッシュだけをフィルタする。 ゲートウェイでのアクセスに失敗した時にipfs resolve -rのエラーメッセージが出ていた気がするので、それを使う。 これまたものすごく時間がかかる。

$ cat hashes.txt | xargs -I hash timeout 60 ipfs resolve -r hash 2>/dev/null | sed '/^$/d' >> resolve.txt
$ cat resolve.txt
/ipfs/Qmd38FX6orV498CN1Z17997R26jZUwgicb1GXZ2kp9kAmq
/ipfs/QmaUYFPjZE4Zttrd8bWUH5aXchWSNZsCdb9aXH4zMpjreL
/ipfs/QmVGKFVHJM3Vfg8kF1vHpYnryPpPo4d8ei84adMFTgRB7X
/ipfs/zb2rhhBBo75RS1WjAjsDsne3H1dvqcGkFmmtRRPDta57NMH5T
/ipfs/QmdBJ16VfDpT9f8c5TH8YagBUHPcDDLcRkxuWQ6eeEdsEj
/ipfs/QmTFzjH1cC9cdj7B8WTmsQjEqWKdVFjf8gxCEFUS6S3jf5
/ipfs/QmWWW1UuPQvu87iL1XE81BWqyPwAW7ArSgt5jpbDR39Cqd
/ipfs/zb2rhkNQ9F9aimY19GTqUTkAy5c2AV3yzgLrKrAYnF7pgsSKv
/ipfs/zb2rhjiXqnYwigVLuoTcYNea9LgU5G4pCFDSzjuzxMTN4sWy9
/ipfs/zb2rhgpzJka244jia1uc7n8djXndB7tSwtfaJgX1ndf7ghMnu
/ipfs/QmYKVG8An1a7nLFirf6QqJhZfoyPquj6xh5hYiqe6HULpF
/ipfs/zb2rhiXhD4b5ewXPXnpyFtFuGnBKkpAy68CZdN9Zakraurg3P
/ipfs/QmfGfPiiL9JSYAWXnLncQEW7umHh2S6Vx3wTr65cuxneT3
/ipfs/QmfH9baorAhyAXFMi5UssmUDfxPu9VTzrtkjFe99rW6rKR
/ipfs/QmPtxs8Lgrxq2MtzGZT8DL65jwdkjT64B24NkmdVbteNwL
/ipfs/QmdBJ16VfDpT9f8c5TH8YagBUHPcDDLcRkxuWQ6eeEdsEj
/ipfs/QmeHoJWmEGQPeWS1VkGDCQT2JCrzVsR4bNQwHhogDknMPV
/ipfs/zb2rhb4hNCrLr2mYLeGk9f2zmgFevhGvhtpVH82SD1xs7PdH9
/ipfs/Qmcs5AJvpbhZbfegsfW6oLUZpiaeHTSEDhNT9w8ZYARrw8
/ipfs/Qmf8uT9Nz9FkC5yUJcYpTR6PyePzrvBVkh4RQi5tNJaB6R
/ipfs/QmdgbRGSnwZ8NM2HFrGyvbT6Ay5a5KP166bYZ3vP358F7D
/ipfs/QmUc94tUkDcgj9VNJRnd36xMVtz1HqHxzC8pVmQcA1rDuX
/ipfs/QmUc94tUkDcgj9VNJRnd36xMVtz1HqHxzC8pVmQcA1rDuX
/ipfs/QmVGKFVHJM3Vfg8kF1vHpYnryPpPo4d8ei84adMFTgRB7X
/ipfs/QmUcSPmsgtqHpKtemor9Ti385GHFKU23joC6TTfwE4aNs8
/ipfs/zb2rhcy8JGBLAAu3ik75JeRZzmN99b2jxJZ5DjcPjkxQRjQyv
/ipfs/zb2rhcy8JGBLAAu3ik75JeRZzmN99b2jxJZ5DjcPjkxQRjQyv
/ipfs/zb2rhncb5GbjCr84TC4uWP5YzzqKJ3iV3cnJWmizViEMaDZea
/ipfs/zb2rhcJEBMctyC2yag4LEVm7FFWmB2jbftsJxMpZPbYqPeT8X
/ipfs/QmWyXJna7aUd46oYkCNnG2FCbZeK3BNYSzYm1634iiDebu
/ipfs/QmNjdKSeBP39zjs44vEhV5DqexHvMY6Aa2zs89sP578KaN
/ipfs/QmbCrkMtaCunhBBTSfMzoP1Tp1Se7nBG7i3YDN4UoWsAk5
/ipfs/QmRNAQXyWuyJHnkHMNGAgeuFgpisdtZ13otutN8hcMG5AU
/ipfs/QmPMTcGvu5eiJY1ujU1BRCzmzrF7YQSX2Wzfv5Ao5YnPBo
/ipfs/QmdBJ16VfDpT9f8c5TH8YagBUHPcDDLcRkxuWQ6eeEdsEj
/ipfs/QmcJZgFDLpFJUzE2PaqUFsjH3gGSvfZmy84RG5Lk6x2fge
/ipfs/QmPmJ44bxwoXw8SjPFRPZ8tia7GDxEaFVzHi7hsCCPBrr7
/ipfs/QmZkSpqxiViGKrf1pCMVoVFJU7rvzoaYya96ZyFt7SatKL
/ipfs/QmX1dCic7XsBPjR6q5hK7PDiLbnDUzJZFUgNcjpyfPvZ9w
/ipfs/zb2rhYM79n5DCyojxo2MUfuLS3rLd1hh9KB6PSsYLfci8BRjs

40件くらいに減ってしまった。 ファイル名が入っているが肝心の中身にアクセスできない壊れたディレクトリオブジェクトや、 フォーマットのわからないバイナリがほとんどである。 そもそものユーザ数が少ないため、読めるデータもだいたい WikipediaのHTML(ページ内のすべてがリンク切れ)Wikipediaの画像だったりする。 これはWikipediaがトルコでブロックされたために作られたスナップショットのものだと思う。

Uncensorable Wikipedia on IPFS

そんな中によくわからない画像テキストがある。 面白くはない。 あえて言うならば癒やしである。


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