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block.go
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block.go
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package coreapi
import (
"bytes"
"context"
"errors"
"fmt"
"io"
"io/ioutil"
util "github.com/ipfs/go-ipfs/blocks/blockstoreutil"
coreiface "github.com/ipfs/go-ipfs/core/coreapi/interface"
caopts "github.com/ipfs/go-ipfs/core/coreapi/interface/options"
mh "gx/ipfs/QmPnFwZ2JXKnXgMw8CdBPxn7FWh6LLdjUjxV1fKHuJnkr8/go-multihash"
blocks "gx/ipfs/QmVzK524a2VWLqyvtBeiHKsUAWYgeAk4DBeZoY7vpNPNRx/go-block-format"
cid "gx/ipfs/QmYVNvtQkeZ6AKSwDrjQTs432QtL6umrrK41EBq3cu7iSP/go-cid"
)
type BlockAPI CoreAPI
type BlockStat struct {
path coreiface.ResolvedPath
size int
}
func (api *BlockAPI) Put(ctx context.Context, src io.Reader, opts ...caopts.BlockPutOption) (coreiface.ResolvedPath, error) {
settings, err := caopts.BlockPutOptions(opts...)
if err != nil {
return nil, err
}
data, err := ioutil.ReadAll(src)
if err != nil {
return nil, err
}
var pref cid.Prefix
pref.Version = 1
formatval, ok := cid.Codecs[settings.Codec]
if !ok {
return nil, fmt.Errorf("unrecognized format: %s", settings.Codec)
}
if settings.Codec == "v0" && settings.MhType == mh.SHA2_256 {
pref.Version = 0
}
pref.Codec = formatval
pref.MhType = settings.MhType
pref.MhLength = settings.MhLength
bcid, err := pref.Sum(data)
if err != nil {
return nil, err
}
b, err := blocks.NewBlockWithCid(data, bcid)
if err != nil {
return nil, err
}
err = api.node.Blocks.AddBlock(b)
if err != nil {
return nil, err
}
return coreiface.IpldPath(b.Cid()), nil
}
func (api *BlockAPI) Get(ctx context.Context, p coreiface.Path) (io.Reader, error) {
rp, err := api.core().ResolvePath(ctx, p)
if err != nil {
return nil, err
}
b, err := api.node.Blocks.GetBlock(ctx, rp.Cid())
if err != nil {
return nil, err
}
return bytes.NewReader(b.RawData()), nil
}
func (api *BlockAPI) Rm(ctx context.Context, p coreiface.Path, opts ...caopts.BlockRmOption) error {
rp, err := api.core().ResolvePath(ctx, p)
if err != nil {
return err
}
settings, err := caopts.BlockRmOptions(opts...)
if err != nil {
return err
}
cids := []*cid.Cid{rp.Cid()}
o := util.RmBlocksOpts{Force: settings.Force}
out, err := util.RmBlocks(api.node.Blockstore, api.node.Pinning, cids, o)
if err != nil {
return err
}
select {
case res, ok := <-out:
if !ok {
return nil
}
remBlock, ok := res.(*util.RemovedBlock)
if !ok {
return errors.New("got unexpected output from util.RmBlocks")
}
if remBlock.Error != "" {
return errors.New(remBlock.Error)
}
return nil
case <-ctx.Done():
return ctx.Err()
}
}
func (api *BlockAPI) Stat(ctx context.Context, p coreiface.Path) (coreiface.BlockStat, error) {
rp, err := api.core().ResolvePath(ctx, p)
if err != nil {
return nil, err
}
b, err := api.node.Blocks.GetBlock(ctx, rp.Cid())
if err != nil {
return nil, err
}
return &BlockStat{
path: coreiface.IpldPath(b.Cid()),
size: len(b.RawData()),
}, nil
}
func (bs *BlockStat) Size() int {
return bs.size
}
func (bs *BlockStat) Path() coreiface.ResolvedPath {
return bs.path
}
func (api *BlockAPI) core() coreiface.CoreAPI {
return (*CoreAPI)(api)
}