406d2b53f8
License: MIT Signed-off-by: Łukasz Magiera <magik6k@gmail.com>
651 lines
16 KiB
Go
651 lines
16 KiB
Go
// Package ipfshttp implements an IPFS Cluster IPFSConnector component. It
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// uses the IPFS HTTP API to communicate to IPFS.
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package ipfshttp
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"strings"
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"sync"
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"time"
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"github.com/ipfs/ipfs-cluster/api"
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cid "gx/ipfs/QmPSQnBKM9g7BaUcZCvswUJVscQ1ipjmwxN5PXCjkp9EQ7/go-cid"
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rpc "gx/ipfs/QmPYiV9nwnXPxdn9zDgY4d9yaHwTS414sUb1K6nvQVHqqo/go-libp2p-gorpc"
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files "gx/ipfs/QmPhx9B9cuaXc4vuw62567BF5NxfpsdD1AVE9HbTn7t1Y6/go-ipfs-files"
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ma "gx/ipfs/QmT4U94DnD8FRfqr21obWY32HLM5VExccPKMjQHofeYqr9/go-multiaddr"
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peer "gx/ipfs/QmTRhk7cgjUf2gfQ3p2M9KPECNZEW9XUrmHcFCgog4cPgB/go-libp2p-peer"
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logging "gx/ipfs/QmZChCsSt8DctjceaL56Eibc29CVQq4dGKRXC5JRZ6Ppae/go-log"
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manet "gx/ipfs/Qmaabb1tJZ2CX5cp6MuuiGgns71NYoxdgQP6Xdid1dVceC/go-multiaddr-net"
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madns "gx/ipfs/QmeHJXPqCNzSFbVkYM1uQLuM2L5FyJB9zukQ7EeqRP8ZC9/go-multiaddr-dns"
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)
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// DNSTimeout is used when resolving DNS multiaddresses in this module
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var DNSTimeout = 5 * time.Second
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var logger = logging.Logger("ipfshttp")
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// updateMetricsMod only makes updates to informer metrics
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// on the nth occasion. So, for example, for every BlockPut,
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// only the 10th will trigger a SendInformerMetrics call.
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var updateMetricMod = 10
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// Connector implements the IPFSConnector interface
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// and provides a component which is used to perform
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// on-demand requests against the configured IPFS daemom
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// (such as a pin request).
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type Connector struct {
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ctx context.Context
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cancel func()
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config *Config
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nodeAddr string
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rpcClient *rpc.Client
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rpcReady chan struct{}
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client *http.Client // client to ipfs daemon
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updateMetricMutex sync.Mutex
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updateMetricCount int
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shutdownLock sync.Mutex
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shutdown bool
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wg sync.WaitGroup
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}
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type ipfsError struct {
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Message string
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}
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type ipfsPinType struct {
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Type string
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}
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type ipfsPinLsResp struct {
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Keys map[string]ipfsPinType
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}
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type ipfsIDResp struct {
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ID string
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Addresses []string
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}
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type ipfsSwarmPeersResp struct {
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Peers []ipfsPeer
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}
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type ipfsPeer struct {
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Peer string
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}
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type ipfsStream struct {
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Protocol string
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}
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// NewConnector creates the component and leaves it ready to be started
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func NewConnector(cfg *Config) (*Connector, error) {
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err := cfg.Validate()
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if err != nil {
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return nil, err
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}
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nodeMAddr := cfg.NodeAddr
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// dns multiaddresses need to be resolved first
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if madns.Matches(nodeMAddr) {
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ctx, cancel := context.WithTimeout(context.Background(), DNSTimeout)
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defer cancel()
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resolvedAddrs, err := madns.Resolve(ctx, cfg.NodeAddr)
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if err != nil {
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logger.Error(err)
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return nil, err
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}
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nodeMAddr = resolvedAddrs[0]
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}
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_, nodeAddr, err := manet.DialArgs(nodeMAddr)
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if err != nil {
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return nil, err
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}
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c := &http.Client{} // timeouts are handled by context timeouts
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ctx, cancel := context.WithCancel(context.Background())
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ipfs := &Connector{
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ctx: ctx,
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config: cfg,
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cancel: cancel,
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nodeAddr: nodeAddr,
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rpcReady: make(chan struct{}, 1),
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client: c,
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}
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go ipfs.run()
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return ipfs, nil
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}
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// connects all ipfs daemons when
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// we receive the rpcReady signal.
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func (ipfs *Connector) run() {
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<-ipfs.rpcReady
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// Do not shutdown while launching threads
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// -- prevents race conditions with ipfs.wg.
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ipfs.shutdownLock.Lock()
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defer ipfs.shutdownLock.Unlock()
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// This runs ipfs swarm connect to the daemons of other cluster members
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ipfs.wg.Add(1)
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go func() {
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defer ipfs.wg.Done()
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// It does not hurt to wait a little bit. i.e. think cluster
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// peers which are started at the same time as the ipfs
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// daemon...
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tmr := time.NewTimer(ipfs.config.ConnectSwarmsDelay)
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defer tmr.Stop()
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select {
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case <-tmr.C:
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// do not hang this goroutine if this call hangs
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// otherwise we hang during shutdown
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go ipfs.ConnectSwarms()
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case <-ipfs.ctx.Done():
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return
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}
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}()
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}
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// SetClient makes the component ready to perform RPC
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// requests.
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func (ipfs *Connector) SetClient(c *rpc.Client) {
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ipfs.rpcClient = c
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ipfs.rpcReady <- struct{}{}
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}
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// Shutdown stops any listeners and stops the component from taking
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// any requests.
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func (ipfs *Connector) Shutdown() error {
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ipfs.shutdownLock.Lock()
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defer ipfs.shutdownLock.Unlock()
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if ipfs.shutdown {
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logger.Debug("already shutdown")
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return nil
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}
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logger.Info("stopping IPFS Connector")
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ipfs.cancel()
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close(ipfs.rpcReady)
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ipfs.wg.Wait()
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ipfs.shutdown = true
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return nil
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}
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// ID performs an ID request against the configured
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// IPFS daemon. It returns the fetched information.
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// If the request fails, or the parsing fails, it
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// returns an error and an empty IPFSID which also
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// contains the error message.
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func (ipfs *Connector) ID() (api.IPFSID, error) {
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ctx, cancel := context.WithTimeout(ipfs.ctx, ipfs.config.IPFSRequestTimeout)
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defer cancel()
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id := api.IPFSID{}
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body, err := ipfs.postCtx(ctx, "id", "", nil)
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if err != nil {
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id.Error = err.Error()
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return id, err
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}
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var res ipfsIDResp
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err = json.Unmarshal(body, &res)
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if err != nil {
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id.Error = err.Error()
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return id, err
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}
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pID, err := peer.IDB58Decode(res.ID)
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if err != nil {
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id.Error = err.Error()
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return id, err
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}
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id.ID = pID
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mAddrs := make([]ma.Multiaddr, len(res.Addresses), len(res.Addresses))
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for i, strAddr := range res.Addresses {
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mAddr, err := ma.NewMultiaddr(strAddr)
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if err != nil {
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id.Error = err.Error()
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return id, err
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}
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mAddrs[i] = mAddr
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}
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id.Addresses = mAddrs
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return id, nil
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}
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// Pin performs a pin request against the configured IPFS
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// daemon.
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func (ipfs *Connector) Pin(ctx context.Context, hash cid.Cid, maxDepth int) error {
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ctx, cancel := context.WithTimeout(ctx, ipfs.config.PinTimeout)
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defer cancel()
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pinStatus, err := ipfs.PinLsCid(ctx, hash)
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if err != nil {
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return err
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}
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if pinStatus.IsPinned(maxDepth) {
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logger.Debug("IPFS object is already pinned: ", hash)
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return nil
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}
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defer ipfs.updateInformerMetric()
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var pinArgs string
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switch {
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case maxDepth < 0:
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pinArgs = "recursive=true"
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case maxDepth == 0:
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pinArgs = "recursive=false"
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default:
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pinArgs = fmt.Sprintf("recursive=true&max-depth=%d", maxDepth)
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}
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switch ipfs.config.PinMethod {
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case "refs": // do refs -r first
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path := fmt.Sprintf("refs?arg=%s&%s", hash, pinArgs)
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err := ipfs.postDiscardBodyCtx(ctx, path)
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if err != nil {
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return err
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}
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logger.Debugf("Refs for %s sucessfully fetched", hash)
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}
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path := fmt.Sprintf("pin/add?arg=%s&%s", hash, pinArgs)
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_, err = ipfs.postCtx(ctx, path, "", nil)
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if err == nil {
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logger.Info("IPFS Pin request succeeded: ", hash)
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}
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return err
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}
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// Unpin performs an unpin request against the configured IPFS
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// daemon.
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func (ipfs *Connector) Unpin(ctx context.Context, hash cid.Cid) error {
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ctx, cancel := context.WithTimeout(ctx, ipfs.config.UnpinTimeout)
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defer cancel()
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pinStatus, err := ipfs.PinLsCid(ctx, hash)
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if err != nil {
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return err
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}
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if pinStatus.IsPinned(-1) {
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defer ipfs.updateInformerMetric()
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path := fmt.Sprintf("pin/rm?arg=%s", hash)
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_, err := ipfs.postCtx(ctx, path, "", nil)
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if err == nil {
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logger.Info("IPFS Unpin request succeeded:", hash)
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}
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return err
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}
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logger.Debug("IPFS object is already unpinned: ", hash)
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return nil
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}
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// PinLs performs a "pin ls --type typeFilter" request against the configured
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// IPFS daemon and returns a map of cid strings and their status.
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func (ipfs *Connector) PinLs(ctx context.Context, typeFilter string) (map[string]api.IPFSPinStatus, error) {
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ctx, cancel := context.WithTimeout(ctx, ipfs.config.IPFSRequestTimeout)
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defer cancel()
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body, err := ipfs.postCtx(ctx, "pin/ls?type="+typeFilter, "", nil)
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// Some error talking to the daemon
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if err != nil {
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return nil, err
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}
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var res ipfsPinLsResp
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err = json.Unmarshal(body, &res)
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if err != nil {
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logger.Error("parsing pin/ls response")
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logger.Error(string(body))
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return nil, err
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}
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statusMap := make(map[string]api.IPFSPinStatus)
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for k, v := range res.Keys {
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statusMap[k] = api.IPFSPinStatusFromString(v.Type)
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}
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return statusMap, nil
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}
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// PinLsCid performs a "pin ls <hash>" request. It first tries with
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// "type=recursive" and then, if not found, with "type=direct". It returns an
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// api.IPFSPinStatus for that hash.
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func (ipfs *Connector) PinLsCid(ctx context.Context, hash cid.Cid) (api.IPFSPinStatus, error) {
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pinLsType := func(pinType string) ([]byte, error) {
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ctx, cancel := context.WithTimeout(ctx, ipfs.config.IPFSRequestTimeout)
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defer cancel()
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lsPath := fmt.Sprintf("pin/ls?arg=%s&type=%s", hash, pinType)
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return ipfs.postCtx(ctx, lsPath, "", nil)
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}
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var body []byte
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var err error
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// FIXME: Sharding may need to check more pin types here.
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for _, pinType := range []string{"recursive", "direct"} {
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body, err = pinLsType(pinType)
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// Network error, daemon down
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if body == nil && err != nil {
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return api.IPFSPinStatusError, err
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}
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// Pin found. Do not keep looking.
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if err == nil {
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break
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}
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}
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if err != nil { // we could not find the pin
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return api.IPFSPinStatusUnpinned, nil
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}
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var res ipfsPinLsResp
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err = json.Unmarshal(body, &res)
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if err != nil {
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logger.Error("parsing pin/ls?arg=cid response:")
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logger.Error(string(body))
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return api.IPFSPinStatusError, err
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}
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pinObj, ok := res.Keys[hash.String()]
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if !ok {
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return api.IPFSPinStatusError, errors.New("expected to find the pin in the response")
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}
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return api.IPFSPinStatusFromString(pinObj.Type), nil
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}
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func (ipfs *Connector) doPostCtx(ctx context.Context, client *http.Client, apiURL, path string, contentType string, postBody io.Reader) (*http.Response, error) {
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logger.Debugf("posting %s", path)
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urlstr := fmt.Sprintf("%s/%s", apiURL, path)
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req, err := http.NewRequest("POST", urlstr, postBody)
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if err != nil {
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logger.Error("error creating POST request:", err)
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}
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req.Header.Set("Content-Type", contentType)
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req = req.WithContext(ctx)
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res, err := ipfs.client.Do(req)
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if err != nil {
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logger.Error("error posting to IPFS:", err)
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}
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return res, err
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}
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// checkResponse tries to parse an error message on non StatusOK responses
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// from ipfs.
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func checkResponse(path string, code int, body []byte) error {
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if code == http.StatusOK {
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return nil
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}
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var ipfsErr ipfsError
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if body != nil && json.Unmarshal(body, &ipfsErr) == nil {
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return fmt.Errorf("IPFS unsuccessful: %d: %s", code, ipfsErr.Message)
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}
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// No error response with useful message from ipfs
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return fmt.Errorf("IPFS-post '%s' unsuccessful: %d: %s", path, code, body)
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}
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// postCtx makes a POST request against
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// the ipfs daemon, reads the full body of the response and
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// returns it after checking for errors.
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func (ipfs *Connector) postCtx(ctx context.Context, path string, contentType string, postBody io.Reader) ([]byte, error) {
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res, err := ipfs.doPostCtx(ctx, ipfs.client, ipfs.apiURL(), path, contentType, postBody)
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if err != nil {
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return nil, err
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}
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defer res.Body.Close()
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body, err := ioutil.ReadAll(res.Body)
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if err != nil {
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logger.Errorf("error reading response body: %s", err)
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return nil, err
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}
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return body, checkResponse(path, res.StatusCode, body)
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}
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// postDiscardBodyCtx makes a POST requests but discards the body
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// of the response directly after reading it.
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func (ipfs *Connector) postDiscardBodyCtx(ctx context.Context, path string) error {
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res, err := ipfs.doPostCtx(ctx, ipfs.client, ipfs.apiURL(), path, "", nil)
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if err != nil {
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return err
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}
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defer res.Body.Close()
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_, err = io.Copy(ioutil.Discard, res.Body)
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if err != nil {
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return err
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}
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return checkResponse(path, res.StatusCode, nil)
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}
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// apiURL is a short-hand for building the url of the IPFS
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// daemon API.
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func (ipfs *Connector) apiURL() string {
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return fmt.Sprintf("http://%s/api/v0", ipfs.nodeAddr)
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}
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// ConnectSwarms requests the ipfs addresses of other peers and
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// triggers ipfs swarm connect requests
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func (ipfs *Connector) ConnectSwarms() error {
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ctx, cancel := context.WithTimeout(ipfs.ctx, ipfs.config.IPFSRequestTimeout)
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defer cancel()
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idsSerial := make([]api.IDSerial, 0)
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err := ipfs.rpcClient.Call(
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"",
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"Cluster",
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"Peers",
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struct{}{},
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&idsSerial,
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)
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if err != nil {
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logger.Error(err)
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return err
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}
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logger.Debugf("%+v", idsSerial)
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for _, idSerial := range idsSerial {
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ipfsID := idSerial.IPFS
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for _, addr := range ipfsID.Addresses {
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// This is a best effort attempt
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// We ignore errors which happens
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// when passing in a bunch of addresses
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_, err := ipfs.postCtx(
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ctx,
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fmt.Sprintf("swarm/connect?arg=%s", addr),
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"",
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nil,
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)
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if err != nil {
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logger.Debug(err)
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continue
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}
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logger.Debugf("ipfs successfully connected to %s", addr)
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}
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}
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return nil
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}
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// ConfigKey fetches the IPFS daemon configuration and retrieves the value for
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// a given configuration key. For example, "Datastore/StorageMax" will return
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// the value for StorageMax in the Datastore configuration object.
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func (ipfs *Connector) ConfigKey(keypath string) (interface{}, error) {
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ctx, cancel := context.WithTimeout(ipfs.ctx, ipfs.config.IPFSRequestTimeout)
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defer cancel()
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res, err := ipfs.postCtx(ctx, "config/show", "", nil)
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if err != nil {
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logger.Error(err)
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return nil, err
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}
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var cfg map[string]interface{}
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err = json.Unmarshal(res, &cfg)
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if err != nil {
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logger.Error(err)
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return nil, err
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}
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path := strings.SplitN(keypath, "/", 2)
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if len(path) == 0 {
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return nil, errors.New("cannot lookup without a path")
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}
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return getConfigValue(path, cfg)
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}
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func getConfigValue(path []string, cfg map[string]interface{}) (interface{}, error) {
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value, ok := cfg[path[0]]
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if !ok {
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return nil, errors.New("key not found in configuration")
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}
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if len(path) == 1 {
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return value, nil
|
|
}
|
|
|
|
switch value.(type) {
|
|
case map[string]interface{}:
|
|
v := value.(map[string]interface{})
|
|
return getConfigValue(path[1:], v)
|
|
default:
|
|
return nil, errors.New("invalid path")
|
|
}
|
|
}
|
|
|
|
// RepoStat returns the DiskUsage and StorageMax repo/stat values from the
|
|
// ipfs daemon, in bytes, wrapped as an IPFSRepoStat object.
|
|
func (ipfs *Connector) RepoStat() (api.IPFSRepoStat, error) {
|
|
ctx, cancel := context.WithTimeout(ipfs.ctx, ipfs.config.IPFSRequestTimeout)
|
|
defer cancel()
|
|
res, err := ipfs.postCtx(ctx, "repo/stat?size-only=true", "", nil)
|
|
if err != nil {
|
|
logger.Error(err)
|
|
return api.IPFSRepoStat{}, err
|
|
}
|
|
|
|
var stats api.IPFSRepoStat
|
|
err = json.Unmarshal(res, &stats)
|
|
if err != nil {
|
|
logger.Error(err)
|
|
return stats, err
|
|
}
|
|
return stats, nil
|
|
}
|
|
|
|
// SwarmPeers returns the peers currently connected to this ipfs daemon.
|
|
func (ipfs *Connector) SwarmPeers() (api.SwarmPeers, error) {
|
|
ctx, cancel := context.WithTimeout(ipfs.ctx, ipfs.config.IPFSRequestTimeout)
|
|
defer cancel()
|
|
swarm := api.SwarmPeers{}
|
|
res, err := ipfs.postCtx(ctx, "swarm/peers", "", nil)
|
|
if err != nil {
|
|
logger.Error(err)
|
|
return swarm, err
|
|
}
|
|
var peersRaw ipfsSwarmPeersResp
|
|
err = json.Unmarshal(res, &peersRaw)
|
|
if err != nil {
|
|
logger.Error(err)
|
|
return swarm, err
|
|
}
|
|
|
|
swarm = make([]peer.ID, len(peersRaw.Peers))
|
|
for i, p := range peersRaw.Peers {
|
|
pID, err := peer.IDB58Decode(p.Peer)
|
|
if err != nil {
|
|
logger.Error(err)
|
|
return swarm, err
|
|
}
|
|
swarm[i] = pID
|
|
}
|
|
return swarm, nil
|
|
}
|
|
|
|
// BlockPut triggers an ipfs block put on the given data, inserting the block
|
|
// into the ipfs daemon's repo.
|
|
func (ipfs *Connector) BlockPut(b api.NodeWithMeta) error {
|
|
logger.Debugf("putting block to IPFS: %s", b.Cid)
|
|
ctx, cancel := context.WithTimeout(ipfs.ctx, ipfs.config.IPFSRequestTimeout)
|
|
defer cancel()
|
|
defer ipfs.updateInformerMetric()
|
|
|
|
multiFileR := files.NewMultiFileReader(files.DirFrom(map[string]files.Node{ // IPFS reqs require a wrapping directory
|
|
"": files.FileFrom(b.Data),
|
|
}), true)
|
|
if b.Format == "" {
|
|
b.Format = "v0"
|
|
}
|
|
url := "block/put?f=" + b.Format
|
|
contentType := "multipart/form-data; boundary=" + multiFileR.Boundary()
|
|
|
|
_, err := ipfs.postCtx(ctx, url, contentType, multiFileR)
|
|
return err
|
|
}
|
|
|
|
// BlockGet retrieves an ipfs block with the given cid
|
|
func (ipfs *Connector) BlockGet(c cid.Cid) ([]byte, error) {
|
|
ctx, cancel := context.WithTimeout(ipfs.ctx, ipfs.config.IPFSRequestTimeout)
|
|
defer cancel()
|
|
url := "block/get?arg=" + c.String()
|
|
return ipfs.postCtx(ctx, url, "", nil)
|
|
}
|
|
|
|
// Returns true every updateMetricsMod-th time that we
|
|
// call this function.
|
|
func (ipfs *Connector) shouldUpdateMetric() bool {
|
|
ipfs.updateMetricMutex.Lock()
|
|
defer ipfs.updateMetricMutex.Unlock()
|
|
ipfs.updateMetricCount++
|
|
if ipfs.updateMetricCount%updateMetricMod == 0 {
|
|
ipfs.updateMetricCount = 0
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// Trigger a broadcast of the local informer metrics.
|
|
func (ipfs *Connector) updateInformerMetric() error {
|
|
if !ipfs.shouldUpdateMetric() {
|
|
return nil
|
|
}
|
|
|
|
var metric api.Metric
|
|
|
|
err := ipfs.rpcClient.GoContext(
|
|
ipfs.ctx,
|
|
"",
|
|
"Cluster",
|
|
"SendInformerMetric",
|
|
struct{}{},
|
|
&metric,
|
|
nil,
|
|
)
|
|
if err != nil {
|
|
logger.Error(err)
|
|
}
|
|
return err
|
|
}
|