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https://github.com/status-im/nim-codex.git
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f24ded0f76
The initial goal of this patch was to allow to download of a file via REST API in exactly the same size as it was uploaded, which required adding fields Chunker.offset and Manifest.originalBytes to keep that size. On top of that, we added more integrity checks to operations on Manifest, and reorganized TestNode.nim to test the actual interaction between node.store and node.retrieve operations. Note that the wire format of Manifest was changed, so we need to recreate all BlockStores. * Download without padding * Fixed chunker tests * Chunker: get rid of RabinChunker * Verify offset in the chunker tests * Use manifest.originalBytesPadded in StoreStream.size * StoreStream: replace emptyBlock with zeroMem * Manifest.bytes: compute how many bytes corresponding StoreStream(Manifest, pad) will return * Manifest: verify originalBytes and originalLen on new/encode/decode Also set originalBytes in each Manifest creation/update scenario * Manifest: comments, split code into sections * Reordered parameters to deal with int64 size in 32-bit builds * TestNode.nim: combine Store and Retrieve tests 1. Instead of copy-pasting code from node.nim, new test calls node.store() and node.retrieve() in order to check that they can correctly store and then retrieve data 2. New test compares only file contents, manifest contents considered an implementation detail 3. New test chunks at odd chunkSize=BlockSize/1.618 in order to ensure that data retrieved correctly even when buffer sizes mismatch * TestNode.nim: code refactoring * Manifest.add: one more test * Manifest.verify: return Result instead of raising Defect * Node.store: added blockSize parameter
45 lines
1.5 KiB
Nim
45 lines
1.5 KiB
Nim
## Nim-Codex
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## Copyright (c) 2022 Status Research & Development GmbH
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## Licensed under either of
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## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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## * MIT license ([LICENSE-MIT](LICENSE-MIT))
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## at your option.
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## This file may not be copied, modified, or distributed except according to
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## those terms.
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# This module defines Manifest and all related types
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import std/tables
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import pkg/libp2p
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import pkg/questionable
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const
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DagPBCodec* = multiCodec("dag-pb")
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type
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ManifestCoderType*[codec: static MultiCodec] = object
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DagPBCoder* = ManifestCoderType[multiCodec("dag-pb")]
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const
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ManifestContainers* = {
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$DagPBCodec: DagPBCoder()
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}.toTable
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type
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Manifest* = ref object of RootObj
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rootHash*: ?Cid # Root (tree) hash of the contained data set
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originalBytes*: int # Exact size of the original (uploaded) file
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blockSize*: int # Size of each contained block (might not be needed if blocks are len-prefixed)
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blocks*: seq[Cid] # Block Cid
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version*: CidVersion # Cid version
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hcodec*: MultiCodec # Multihash codec
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codec*: MultiCodec # Data set codec
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case protected*: bool # Protected datasets have erasure coded info
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of true:
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K*: int # Number of blocks to encode
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M*: int # Number of resulting parity blocks
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originalCid*: Cid # The original Cid of the dataset being erasure coded
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originalLen*: int # The length of the original manifest
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else:
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discard
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