/
block.go
145 lines (116 loc) · 2.9 KB
/
block.go
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//<developer>
// <name>linapex 曹一峰</name>
// <email>linapex@163.com</email>
// <wx>superexc</wx>
// <qqgroup>128148617</qqgroup>
// <url>https://jsq.ink</url>
// <role>pku engineer</role>
// <date>2019-03-16 19:56:39</date>
//</624460164690350080>
package coreapi
import (
"bytes"
"context"
"errors"
"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"
cid "gx/ipfs/QmR8BauakNcBa3RbE4nbQu76PDiJgoQgz8AJdhJuiU4TAw/go-cid"
blocks "gx/ipfs/QmWoXtvgC8inqFkAATB7cp2Dax7XBi9VDvSg9RCCZufmRk/go-block-format"
)
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.BlockStat, error) {
_, pref, err := caopts.BlockPutOptions(opts...)
if err != nil {
return nil, err
}
data, err := ioutil.ReadAll(src)
if err != nil {
return nil, err
}
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.blocks.AddBlock(b)
if err != nil {
return nil, err
}
return &BlockStat{path: coreiface.IpldPath(b.Cid()), size: len(data)}, 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.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.blockstore, api.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.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)
}