diff --git a/.circleci/config.yml b/.circleci/config.yml new file mode 100644 index 0000000000000000000000000000000000000000..7c51cb69b379b377d441b1abd0ee6bd428e71ccc --- /dev/null +++ b/.circleci/config.yml @@ -0,0 +1,11 @@ +version: 2.1 +orbs: + ci-go: ipfs/ci-go@0.1 + +workflows: + version: 2 + test: + jobs: + - ci-go/build + - ci-go/lint + - ci-go/test diff --git a/.github/ISSUE_TEMPLATE/config.yml b/.github/ISSUE_TEMPLATE/config.yml new file mode 100644 index 0000000000000000000000000000000000000000..4b86d7197f9a6f1a988c503defc8451392cd5e55 --- /dev/null +++ b/.github/ISSUE_TEMPLATE/config.yml @@ -0,0 +1,8 @@ +blank_issues_enabled: false +contact_links: + - name: Getting Help on IPFS + url: https://ipfs.io/help + about: All information about how and where to get help on IPFS. + - name: IPFS Official Forum + url: https://discuss.ipfs.io + about: Please post general questions, support requests, and discussions here. diff --git a/.github/ISSUE_TEMPLATE/open_an_issue.md b/.github/ISSUE_TEMPLATE/open_an_issue.md new file mode 100644 index 0000000000000000000000000000000000000000..4fcbd00aca0d513c2729d8df4afb5a01fdbe7d02 --- /dev/null +++ b/.github/ISSUE_TEMPLATE/open_an_issue.md @@ -0,0 +1,19 @@ +--- +name: Open an issue +about: Only for actionable issues relevant to this repository. +title: '' +labels: need/triage +assignees: '' + +--- + diff --git a/.github/config.yml b/.github/config.yml new file mode 100644 index 0000000000000000000000000000000000000000..ed26646a0f7cdda6cf10ede2b0b98cac89cf67b0 --- /dev/null +++ b/.github/config.yml @@ -0,0 +1,68 @@ +# Configuration for welcome - https://github.com/behaviorbot/welcome + +# Configuration for new-issue-welcome - https://github.com/behaviorbot/new-issue-welcome +# Comment to be posted to on first time issues +newIssueWelcomeComment: > + Thank you for submitting your first issue to this repository! A maintainer + will be here shortly to triage and review. + + In the meantime, please double-check that you have provided all the + necessary information to make this process easy! Any information that can + help save additional round trips is useful! We currently aim to give + initial feedback within **two business days**. If this does not happen, feel + free to leave a comment. + + Please keep an eye on how this issue will be labeled, as labels give an + overview of priorities, assignments and additional actions requested by the + maintainers: + + - "Priority" labels will show how urgent this is for the team. + - "Status" labels will show if this is ready to be worked on, blocked, or in progress. + - "Need" labels will indicate if additional input or analysis is required. + + Finally, remember to use https://discuss.ipfs.io if you just need general + support. + +# Configuration for new-pr-welcome - https://github.com/behaviorbot/new-pr-welcome +# Comment to be posted to on PRs from first time contributors in your repository +newPRWelcomeComment: > + Thank you for submitting this PR! + + A maintainer will be here shortly to review it. + + We are super grateful, but we are also overloaded! Help us by making sure + that: + + * The context for this PR is clear, with relevant discussion, decisions + and stakeholders linked/mentioned. + + * Your contribution itself is clear (code comments, self-review for the + rest) and in its best form. Follow the [code contribution + guidelines](https://github.com/ipfs/community/blob/master/CONTRIBUTING.md#code-contribution-guidelines) + if they apply. + + Getting other community members to do a review would be great help too on + complex PRs (you can ask in the chats/forums). If you are unsure about + something, just leave us a comment. + + Next steps: + + * A maintainer will triage and assign priority to this PR, commenting on + any missing things and potentially assigning a reviewer for high + priority items. + + * The PR gets reviews, discussed and approvals as needed. + + * The PR is merged by maintainers when it has been approved and comments addressed. + + We currently aim to provide initial feedback/triaging within **two business + days**. Please keep an eye on any labelling actions, as these will indicate + priorities and status of your contribution. + + We are very grateful for your contribution! + + +# Configuration for first-pr-merge - https://github.com/behaviorbot/first-pr-merge +# Comment to be posted to on pull requests merged by a first time user +# Currently disabled +#firstPRMergeComment: "" diff --git a/.gx/lastpubver b/.gx/lastpubver new file mode 100644 index 0000000000000000000000000000000000000000..4dd6863fdd0b02c096a71c4f3ede7cf4da5db3bc --- /dev/null +++ b/.gx/lastpubver @@ -0,0 +1 @@ +1.1.31: QmTRbLgKn2BKNvr9z5JQ3uZC4FSyLkad9t7qTVPkbH1LRB diff --git a/.gx/post-install b/.gx/post-install new file mode 100644 index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000000000000000000000000000000000000..7d5dcac4d22769b1b48501e091ee9750dd053300 --- /dev/null +++ b/LICENSE @@ -0,0 +1,21 @@ +The MIT License (MIT) + +Copyright (c) 2014-2018 Juan Batiz-Benet + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. diff --git a/README.md b/README.md index 20ac3965aa154633162a854784bbe9bf261cb82b..d36c5cc7797c5969662fee5fe1576f182a622730 100644 --- a/README.md +++ b/README.md @@ -1,3 +1,36 @@ -# go-blockservice +go-blockservice +================== -dms3 block service \ No newline at end of file +[![](https://img.shields.io/badge/made%20by-Protocol%20Labs-blue.svg?style=flat-square)](http://ipn.io) +[![](https://img.shields.io/badge/project-IPFS-blue.svg?style=flat-square)](http://ipfs.io/) +[![](https://img.shields.io/badge/freenode-%23ipfs-blue.svg?style=flat-square)](http://webchat.freenode.net/?channels=%23ipfs) +[![Coverage Status](https://codecov.io/gh/ipfs/go-block-format/branch/master/graph/badge.svg)](https://codecov.io/gh/ipfs/go-block-format/branch/master) +[![Build Status](https://circleci.com/gh/ipfs/go-blockservice.svg?style=svg)](https://circleci.com/gh/ipfs/go-blockservice) + +> go-blockservice provides a seamless interface to both local and remote storage backends. + +## Lead Maintainer + +[Steven Allen](https://github.com/Stebalien) + +## Table of Contents + +- [TODO](#todo) +- [Contribute](#contribute) +- [License](#license) + +## TODO + +The interfaces here really would like to be merged with the blockstore interfaces. +The 'dagservice' constructor currently takes a blockservice, but it would be really nice +if it could just take a blockstore, and have this package implement a blockstore. + +## Contribute + +PRs are welcome! + +Small note: If editing the Readme, please conform to the [standard-readme](https://github.com/RichardLitt/standard-readme) specification. + +## License + +MIT © Juan Batiz-Benet diff --git a/blockservice.go b/blockservice.go new file mode 100644 index 0000000000000000000000000000000000000000..2f320b139bf1e5d8a1ab5f179c56d2b444888abb --- /dev/null +++ b/blockservice.go @@ -0,0 +1,385 @@ +// package blockservice implements a BlockService interface that provides +// a single GetBlock/AddBlock interface that seamlessly retrieves data either +// locally or from a remote peer through the exchange. +package blockservice + +import ( + "context" + "errors" + "io" + "sync" + + blocks "github.com/ipfs/go-block-format" + cid "github.com/ipfs/go-cid" + blockstore "github.com/ipfs/go-ipfs-blockstore" + exchange "github.com/ipfs/go-ipfs-exchange-interface" + logging "github.com/ipfs/go-log" + "github.com/ipfs/go-verifcid" +) + +var log = logging.Logger("blockservice") + +var ErrNotFound = errors.New("blockservice: key not found") + +// BlockGetter is the common interface shared between blockservice sessions and +// the blockservice. +type BlockGetter interface { + // GetBlock gets the requested block. + GetBlock(ctx context.Context, c cid.Cid) (blocks.Block, error) + + // GetBlocks does a batch request for the given cids, returning blocks as + // they are found, in no particular order. + // + // It may not be able to find all requested blocks (or the context may + // be canceled). In that case, it will close the channel early. It is up + // to the consumer to detect this situation and keep track which blocks + // it has received and which it hasn't. + GetBlocks(ctx context.Context, ks []cid.Cid) <-chan blocks.Block +} + +// BlockService is a hybrid block datastore. It stores data in a local +// datastore and may retrieve data from a remote Exchange. +// It uses an internal `datastore.Datastore` instance to store values. +type BlockService interface { + io.Closer + BlockGetter + + // Blockstore returns a reference to the underlying blockstore + Blockstore() blockstore.Blockstore + + // Exchange returns a reference to the underlying exchange (usually bitswap) + Exchange() exchange.Interface + + // AddBlock puts a given block to the underlying datastore + AddBlock(o blocks.Block) error + + // AddBlocks adds a slice of blocks at the same time using batching + // capabilities of the underlying datastore whenever possible. + AddBlocks(bs []blocks.Block) error + + // DeleteBlock deletes the given block from the blockservice. + DeleteBlock(o cid.Cid) error +} + +type blockService struct { + blockstore blockstore.Blockstore + exchange exchange.Interface + // If checkFirst is true then first check that a block doesn't + // already exist to avoid republishing the block on the exchange. + checkFirst bool +} + +// NewBlockService creates a BlockService with given datastore instance. +func New(bs blockstore.Blockstore, rem exchange.Interface) BlockService { + if rem == nil { + log.Debug("blockservice running in local (offline) mode.") + } + + return &blockService{ + blockstore: bs, + exchange: rem, + checkFirst: true, + } +} + +// NewWriteThrough ceates a BlockService that guarantees writes will go +// through to the blockstore and are not skipped by cache checks. +func NewWriteThrough(bs blockstore.Blockstore, rem exchange.Interface) BlockService { + if rem == nil { + log.Debug("blockservice running in local (offline) mode.") + } + + return &blockService{ + blockstore: bs, + exchange: rem, + checkFirst: false, + } +} + +// Blockstore returns the blockstore behind this blockservice. +func (s *blockService) Blockstore() blockstore.Blockstore { + return s.blockstore +} + +// Exchange returns the exchange behind this blockservice. +func (s *blockService) Exchange() exchange.Interface { + return s.exchange +} + +// NewSession creates a new session that allows for +// controlled exchange of wantlists to decrease the bandwidth overhead. +// If the current exchange is a SessionExchange, a new exchange +// session will be created. Otherwise, the current exchange will be used +// directly. +func NewSession(ctx context.Context, bs BlockService) *Session { + exch := bs.Exchange() + if sessEx, ok := exch.(exchange.SessionExchange); ok { + return &Session{ + sessCtx: ctx, + ses: nil, + sessEx: sessEx, + bs: bs.Blockstore(), + } + } + return &Session{ + ses: exch, + sessCtx: ctx, + bs: bs.Blockstore(), + } +} + +// AddBlock adds a particular block to the service, Putting it into the datastore. +// TODO pass a context into this if the remote.HasBlock is going to remain here. +func (s *blockService) AddBlock(o blocks.Block) error { + c := o.Cid() + // hash security + err := verifcid.ValidateCid(c) + if err != nil { + return err + } + if s.checkFirst { + if has, err := s.blockstore.Has(c); has || err != nil { + return err + } + } + + if err := s.blockstore.Put(o); err != nil { + return err + } + + log.Event(context.TODO(), "BlockService.BlockAdded", c) + + if s.exchange != nil { + if err := s.exchange.HasBlock(o); err != nil { + log.Errorf("HasBlock: %s", err.Error()) + } + } + + return nil +} + +func (s *blockService) AddBlocks(bs []blocks.Block) error { + // hash security + for _, b := range bs { + err := verifcid.ValidateCid(b.Cid()) + if err != nil { + return err + } + } + var toput []blocks.Block + if s.checkFirst { + toput = make([]blocks.Block, 0, len(bs)) + for _, b := range bs { + has, err := s.blockstore.Has(b.Cid()) + if err != nil { + return err + } + if !has { + toput = append(toput, b) + } + } + } else { + toput = bs + } + + if len(toput) == 0 { + return nil + } + + err := s.blockstore.PutMany(toput) + if err != nil { + return err + } + + if s.exchange != nil { + for _, o := range toput { + log.Event(context.TODO(), "BlockService.BlockAdded", o.Cid()) + if err := s.exchange.HasBlock(o); err != nil { + log.Errorf("HasBlock: %s", err.Error()) + } + } + } + return nil +} + +// GetBlock retrieves a particular block from the service, +// Getting it from the datastore using the key (hash). +func (s *blockService) GetBlock(ctx context.Context, c cid.Cid) (blocks.Block, error) { + log.Debugf("BlockService GetBlock: '%s'", c) + + var f func() exchange.Fetcher + if s.exchange != nil { + f = s.getExchange + } + + return getBlock(ctx, c, s.blockstore, f) // hash security +} + +func (s *blockService) getExchange() exchange.Fetcher { + return s.exchange +} + +func getBlock(ctx context.Context, c cid.Cid, bs blockstore.Blockstore, fget func() exchange.Fetcher) (blocks.Block, error) { + err := verifcid.ValidateCid(c) // hash security + if err != nil { + return nil, err + } + + block, err := bs.Get(c) + if err == nil { + return block, nil + } + + if err == blockstore.ErrNotFound && fget != nil { + f := fget() // Don't load the exchange until we have to + + // TODO be careful checking ErrNotFound. If the underlying + // implementation changes, this will break. + log.Debug("Blockservice: Searching bitswap") + blk, err := f.GetBlock(ctx, c) + if err != nil { + if err == blockstore.ErrNotFound { + return nil, ErrNotFound + } + return nil, err + } + log.Event(ctx, "BlockService.BlockFetched", c) + return blk, nil + } + + log.Debug("Blockservice GetBlock: Not found") + if err == blockstore.ErrNotFound { + return nil, ErrNotFound + } + + return nil, err +} + +// GetBlocks gets a list of blocks asynchronously and returns through +// the returned channel. +// NB: No guarantees are made about order. +func (s *blockService) GetBlocks(ctx context.Context, ks []cid.Cid) <-chan blocks.Block { + var f func() exchange.Fetcher + if s.exchange != nil { + f = s.getExchange + } + + return getBlocks(ctx, ks, s.blockstore, f) // hash security +} + +func getBlocks(ctx context.Context, ks []cid.Cid, bs blockstore.Blockstore, fget func() exchange.Fetcher) <-chan blocks.Block { + out := make(chan blocks.Block) + + go func() { + defer close(out) + + allValid := true + for _, c := range ks { + if err := verifcid.ValidateCid(c); err != nil { + allValid = false + break + } + } + + if !allValid { + ks2 := make([]cid.Cid, 0, len(ks)) + for _, c := range ks { + // hash security + if err := verifcid.ValidateCid(c); err == nil { + ks2 = append(ks2, c) + } else { + log.Errorf("unsafe CID (%s) passed to blockService.GetBlocks: %s", c, err) + } + } + ks = ks2 + } + + var misses []cid.Cid + for _, c := range ks { + hit, err := bs.Get(c) + if err != nil { + misses = append(misses, c) + continue + } + select { + case out <- hit: + case <-ctx.Done(): + return + } + } + + if len(misses) == 0 || fget == nil { + return + } + + f := fget() // don't load exchange unless we have to + rblocks, err := f.GetBlocks(ctx, misses) + if err != nil { + log.Debugf("Error with GetBlocks: %s", err) + return + } + + for b := range rblocks { + log.Event(ctx, "BlockService.BlockFetched", b.Cid()) + select { + case out <- b: + case <-ctx.Done(): + return + } + } + }() + return out +} + +// DeleteBlock deletes a block in the blockservice from the datastore +func (s *blockService) DeleteBlock(c cid.Cid) error { + err := s.blockstore.DeleteBlock(c) + if err == nil { + log.Event(context.TODO(), "BlockService.BlockDeleted", c) + } + return err +} + +func (s *blockService) Close() error { + log.Debug("blockservice is shutting down...") + return s.exchange.Close() +} + +// Session is a helper type to provide higher level access to bitswap sessions +type Session struct { + bs blockstore.Blockstore + ses exchange.Fetcher + sessEx exchange.SessionExchange + sessCtx context.Context + lk sync.Mutex +} + +func (s *Session) getSession() exchange.Fetcher { + s.lk.Lock() + defer s.lk.Unlock() + if s.ses == nil { + s.ses = s.sessEx.NewSession(s.sessCtx) + } + + return s.ses +} + +// GetBlock gets a block in the context of a request session +func (s *Session) GetBlock(ctx context.Context, c cid.Cid) (blocks.Block, error) { + var f func() exchange.Fetcher + if s.sessEx != nil { + f = s.getSession + } + return getBlock(ctx, c, s.bs, f) // hash security +} + +// GetBlocks gets blocks in the context of a request session +func (s *Session) GetBlocks(ctx context.Context, ks []cid.Cid) <-chan blocks.Block { + var f func() exchange.Fetcher + if s.sessEx != nil { + f = s.getSession + } + return getBlocks(ctx, ks, s.bs, f) // hash security +} + +var _ BlockGetter = (*Session)(nil) diff --git a/blockservice_test.go b/blockservice_test.go new file mode 100644 index 0000000000000000000000000000000000000000..36cdf0330c7be1aca7417827aaee1ddb95b85ea5 --- /dev/null +++ b/blockservice_test.go @@ -0,0 +1,149 @@ +package blockservice + +import ( + "context" + "testing" + + blocks "github.com/ipfs/go-block-format" + ds "github.com/ipfs/go-datastore" + dssync "github.com/ipfs/go-datastore/sync" + blockstore "github.com/ipfs/go-ipfs-blockstore" + butil "github.com/ipfs/go-ipfs-blocksutil" + exchange "github.com/ipfs/go-ipfs-exchange-interface" + offline "github.com/ipfs/go-ipfs-exchange-offline" +) + +func TestWriteThroughWorks(t *testing.T) { + bstore := &PutCountingBlockstore{ + blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore())), + 0, + } + bstore2 := blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore())) + exch := offline.Exchange(bstore2) + bserv := NewWriteThrough(bstore, exch) + bgen := butil.NewBlockGenerator() + + block := bgen.Next() + + t.Logf("PutCounter: %d", bstore.PutCounter) + err := bserv.AddBlock(block) + if err != nil { + t.Fatal(err) + } + if bstore.PutCounter != 1 { + t.Fatalf("expected just one Put call, have: %d", bstore.PutCounter) + } + + err = bserv.AddBlock(block) + if err != nil { + t.Fatal(err) + } + if bstore.PutCounter != 2 { + t.Fatalf("Put should have called again, should be 2 is: %d", bstore.PutCounter) + } +} + +func TestLazySessionInitialization(t *testing.T) { + ctx := context.Background() + ctx, cancel := context.WithCancel(ctx) + defer cancel() + + bstore := blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore())) + bstore2 := blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore())) + bstore3 := blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore())) + session := offline.Exchange(bstore2) + exchange := offline.Exchange(bstore3) + sessionExch := &fakeSessionExchange{Interface: exchange, session: session} + bservSessEx := NewWriteThrough(bstore, sessionExch) + bgen := butil.NewBlockGenerator() + + block := bgen.Next() + err := bstore.Put(block) + if err != nil { + t.Fatal(err) + } + block2 := bgen.Next() + err = session.HasBlock(block2) + if err != nil { + t.Fatal(err) + } + + bsession := NewSession(ctx, bservSessEx) + if bsession.ses != nil { + t.Fatal("Session exchange should not instantiated session immediately") + } + returnedBlock, err := bsession.GetBlock(ctx, block.Cid()) + if err != nil { + t.Fatal("Should have fetched block locally") + } + if returnedBlock.Cid() != block.Cid() { + t.Fatal("Got incorrect block") + } + if bsession.ses != nil { + t.Fatal("Session exchange should not instantiated session if local store had block") + } + returnedBlock, err = bsession.GetBlock(ctx, block2.Cid()) + if err != nil { + t.Fatal("Should have fetched block remotely") + } + if returnedBlock.Cid() != block2.Cid() { + t.Fatal("Got incorrect block") + } + if bsession.ses != session { + t.Fatal("Should have initialized session to fetch block") + } +} + +var _ blockstore.Blockstore = (*PutCountingBlockstore)(nil) + +type PutCountingBlockstore struct { + blockstore.Blockstore + PutCounter int +} + +func (bs *PutCountingBlockstore) Put(block blocks.Block) error { + bs.PutCounter++ + return bs.Blockstore.Put(block) +} + +var _ exchange.SessionExchange = (*fakeSessionExchange)(nil) + +type fakeSessionExchange struct { + exchange.Interface + session exchange.Fetcher +} + +func (fe *fakeSessionExchange) NewSession(ctx context.Context) exchange.Fetcher { + if ctx == nil { + panic("nil context") + } + return fe.session +} + +func TestNilExchange(t *testing.T) { + ctx := context.Background() + ctx, cancel := context.WithCancel(ctx) + defer cancel() + + bgen := butil.NewBlockGenerator() + block := bgen.Next() + + bs := blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore())) + bserv := NewWriteThrough(bs, nil) + sess := NewSession(ctx, bserv) + _, err := sess.GetBlock(ctx, block.Cid()) + if err != ErrNotFound { + t.Fatal("expected block to not be found") + } + err = bs.Put(block) + if err != nil { + t.Fatal(err) + } + b, err := sess.GetBlock(ctx, block.Cid()) + if err != nil { + t.Fatal(err) + } + if b.Cid() != block.Cid() { + t.Fatal("got the wrong block") + } +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000000000000000000000000000000000000..b966f19f0f6bcb0e1ebda5db4a13784e7df5be46 --- /dev/null +++ b/go.mod @@ -0,0 +1,19 @@ +module github.com/ipfs/go-blockservice + +go 1.13 + +require ( + 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v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw= +gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE= +gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw= +gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= diff --git a/test/blocks_test.go b/test/blocks_test.go new file mode 100644 index 0000000000000000000000000000000000000000..ee808e66e8573295d29c4d703894eb615089782c --- /dev/null +++ b/test/blocks_test.go @@ -0,0 +1,100 @@ +package bstest + +import ( + "bytes" + "context" + "fmt" + "testing" + "time" + + . "github.com/ipfs/go-blockservice" + + blocks "github.com/ipfs/go-block-format" + cid "github.com/ipfs/go-cid" + ds "github.com/ipfs/go-datastore" + dssync "github.com/ipfs/go-datastore/sync" + blockstore "github.com/ipfs/go-ipfs-blockstore" + offline "github.com/ipfs/go-ipfs-exchange-offline" + u "github.com/ipfs/go-ipfs-util" +) + +func newObject(data []byte) blocks.Block { + return blocks.NewBlock(data) +} + +func TestBlocks(t *testing.T) { + bstore := blockstore.NewBlockstore(dssync.MutexWrap(ds.NewMapDatastore())) + bs := New(bstore, offline.Exchange(bstore)) + defer bs.Close() + + o := newObject([]byte("beep boop")) + h := cid.NewCidV0(u.Hash([]byte("beep boop"))) + if !o.Cid().Equals(h) { + t.Error("Block key and data multihash key not equal") + } + + err := bs.AddBlock(o) + if err != nil { + t.Error("failed to add block to BlockService", err) + return + } + + ctx, cancel := context.WithTimeout(context.Background(), time.Second*5) + defer cancel() + b2, err := bs.GetBlock(ctx, o.Cid()) + if err != nil { + t.Error("failed to retrieve block from BlockService", err) + return + } + + if !o.Cid().Equals(b2.Cid()) { + t.Error("Block keys not equal.") + } + + if !bytes.Equal(o.RawData(), b2.RawData()) { + t.Error("Block data is not equal.") + } +} + +func makeObjects(n int) []blocks.Block { + var out []blocks.Block + for i := 0; i < n; i++ { + out = append(out, newObject([]byte(fmt.Sprintf("object %d", i)))) + } + return out +} + +func TestGetBlocksSequential(t *testing.T) { + var servs = Mocks(4) + for _, s := range servs { + defer s.Close() + } + objs := makeObjects(50) + + var cids []cid.Cid + for _, o := range objs { + cids = append(cids, o.Cid()) + err := servs[0].AddBlock(o) + if err != nil { + t.Fatal(err) + } + } + + t.Log("one instance at a time, get blocks concurrently") + + for i := 1; i < len(servs); i++ { + ctx, cancel := context.WithTimeout(context.Background(), time.Second*50) + defer cancel() + out := servs[i].GetBlocks(ctx, cids) + gotten := make(map[string]blocks.Block) + for blk := range out { + if _, ok := gotten[blk.Cid().KeyString()]; ok { + t.Fatal("Got duplicate block!") + } + gotten[blk.Cid().KeyString()] = blk + } + if len(gotten) != len(objs) { + t.Fatalf("Didnt get enough blocks back: %d/%d", len(gotten), len(objs)) + } + } +} diff --git a/test/mock.go b/test/mock.go new file mode 100644 index 0000000000000000000000000000000000000000..a6eba6911ce63db2d85d127aa02c114f930fc6e8 --- /dev/null +++ b/test/mock.go @@ -0,0 +1,24 @@ +package bstest + +import ( + . "github.com/ipfs/go-blockservice" + + testinstance "github.com/ipfs/go-bitswap/testinstance" + tn "github.com/ipfs/go-bitswap/testnet" + delay "github.com/ipfs/go-ipfs-delay" + mockrouting "github.com/ipfs/go-ipfs-routing/mock" +) + +// Mocks returns |n| connected mock Blockservices +func Mocks(n int) []BlockService { + net := tn.VirtualNetwork(mockrouting.NewServer(), delay.Fixed(0)) + sg := testinstance.NewTestInstanceGenerator(net) + + instances := sg.Instances(n) + + var servs []BlockService + for _, i := range instances { + servs = append(servs, New(i.Blockstore(), i.Exchange)) + } + return servs +}