Transfer whole sub-DAGs from some peers to a local one.
npm install
First create a 1MB file:
head -c 1m /dev/zero|openssl enc -aes-128-cbc -pass pass: -nosalt > /tmp/1mb.bin
Load this file into a JS-IPFS peer:
IPFS_PATH=/tmp/transsubreposerver jsipfs init
IPFS_PATH=/tmp/transsubreposerver jsipfs add /tmp/1mb.bin
added QmTaxZi1CXzyntZzXx8na6HV3LiZ4y2xNLpdkKwt99FkMz 1mb.bin
Start the Server:
node server.js
On another terminal, you can run several command with the Consumer:
# Get all blocks needed to list a directory
node consumer.js ls QmfGBRT6BbWJd7yUc2uYdaUZJBbnEFvTqehPFoSMQ6wgdr
# Get all blocks from this specific file
node consumer.js get QmTaxZi1CXzyntZzXx8na6HV3LiZ4y2xNLpdkKwt99FkMz
# Get all blocks needed to get from a 300000 offset 500 bytes
node consumer.js cat QmTaxZi1CXzyntZzXx8na6HV3LiZ4y2xNLpdkKwt99FkMz 300000 500
You can abort the Consumer and run the client:
node client.js QmTaxZi1CXzyntZzXx8na6HV3LiZ4y2xNLpdkKwt99FkMz
It will print out the size of the file and write it to disk as /tmp/out.bin.
You can confirm that it’s the correct file via:
sha256sum /tmp/out.bin /tmp/1mb.bin
02a4ed10b5a54c2537a630a98cd2675bd79e2f557947f419e9b055fad4f17698 /tmp/out.bin
02a4ed10b5a54c2537a630a98cd2675bd79e2f557947f419e9b055fad4f17698 /tmp/1mb.bin
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