2016-12-02 18:33:39 +00:00
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package ipfscluster
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import (
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"context"
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"encoding/json"
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"fmt"
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"net"
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2016-12-02 18:33:39 +00:00
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"net/http"
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2016-12-15 13:07:19 +00:00
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"strings"
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"sync"
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2016-12-22 10:31:09 +00:00
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"time"
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2016-12-02 18:33:39 +00:00
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2016-12-16 11:40:28 +00:00
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peer "github.com/libp2p/go-libp2p-peer"
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2016-12-02 18:33:39 +00:00
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2016-12-16 11:40:28 +00:00
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cid "github.com/ipfs/go-cid"
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2016-12-02 18:33:39 +00:00
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mux "github.com/gorilla/mux"
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)
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2016-12-22 10:31:09 +00:00
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// Server settings
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var (
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// maximum duration before timing out read of the request
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RESTAPIServerReadTimeout = 5 * time.Second
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// maximum duration before timing out write of the response
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RESTAPIServerWriteTimeout = 10 * time.Second
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// server-side the amount of time a Keep-Alive connection will be
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// kept idle before being reused
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RESTAPIServerIdleTimeout = 60 * time.Second
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)
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2016-12-16 18:14:45 +00:00
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// RESTAPI implements an API and aims to provides
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// a RESTful HTTP API for Cluster.
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2016-12-16 18:14:45 +00:00
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type RESTAPI struct {
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ctx context.Context
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listenAddr string
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listenPort int
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rpcCh chan RPC
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router *mux.Router
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listener net.Listener
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server *http.Server
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2016-12-15 13:07:19 +00:00
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shutdownLock sync.Mutex
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shutdown bool
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wg sync.WaitGroup
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2016-12-02 18:33:39 +00:00
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}
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type route struct {
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Name string
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Method string
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Pattern string
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HandlerFunc http.HandlerFunc
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}
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type errorResp struct {
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Code int `json:"code"`
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Message string `json:"message"`
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}
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func (e errorResp) Error() string {
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return e.Message
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}
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type versionResp struct {
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Version string `json:"version"`
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}
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type pinResp struct {
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Pinned string `json:"pinned"`
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}
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type unpinResp struct {
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Unpinned string `json:"unpinned"`
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}
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2016-12-19 17:35:24 +00:00
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type statusInfo struct {
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2016-12-20 18:51:13 +00:00
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IPFS string `json:"ipfs"`
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}
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type statusCidResp struct {
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Cid string `json:"cid"`
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Status map[string]statusInfo `json:"status"`
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}
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2016-12-15 18:08:46 +00:00
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type statusResp []statusCidResp
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2016-12-16 21:00:08 +00:00
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// NewRESTAPI creates a new object which is ready to be
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// started.
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2016-12-16 21:00:08 +00:00
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func NewRESTAPI(cfg *Config) (*RESTAPI, error) {
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ctx := context.Background()
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l, err := net.Listen("tcp", fmt.Sprintf("%s:%d",
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cfg.APIAddr,
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cfg.APIPort))
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if err != nil {
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return nil, err
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}
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2016-12-09 19:54:46 +00:00
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router := mux.NewRouter().StrictSlash(true)
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s := &http.Server{
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ReadTimeout: RESTAPIServerReadTimeout,
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WriteTimeout: RESTAPIServerWriteTimeout,
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//IdleTimeout: RESTAPIServerIdleTimeout, // TODO: Go 1.8
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Handler: router,
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}
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s.SetKeepAlivesEnabled(true) // A reminder that this can be changed
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api := &RESTAPI{
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ctx: ctx,
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listenAddr: cfg.APIAddr,
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listenPort: cfg.APIPort,
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listener: l,
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server: s,
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rpcCh: make(chan RPC, RPCMaxQueue),
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}
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for _, route := range api.routes() {
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router.
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Methods(route.Method).
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Path(route.Pattern).
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Name(route.Name).
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Handler(route.HandlerFunc)
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}
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api.router = router
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logger.Infof("starting Cluster API on %s:%d", api.listenAddr, api.listenPort)
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api.run()
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2016-12-02 18:33:39 +00:00
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return api, nil
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}
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func (api *RESTAPI) routes() []route {
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return []route{
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route{
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"Members",
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"GET",
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"/members",
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api.memberListHandler,
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},
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route{
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"Pins",
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"GET",
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"/pins",
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api.pinListHandler,
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},
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route{
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"Version",
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"GET",
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"/version",
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api.versionHandler,
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},
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route{
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"Pin",
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"POST",
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"/pins/{hash}",
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api.pinHandler,
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},
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route{
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"Unpin",
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"DELETE",
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"/pins/{hash}",
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api.unpinHandler,
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},
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route{
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"Status",
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"GET",
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"/status",
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api.statusHandler,
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},
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route{
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"StatusCid",
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"GET",
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"/status/{hash}",
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api.statusCidHandler,
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},
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route{
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"Sync",
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"POST",
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"/status",
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api.syncHandler,
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},
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route{
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"SyncCid",
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"POST",
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"/status/{hash}",
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api.syncCidHandler,
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},
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}
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}
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func (api *RESTAPI) run() {
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api.wg.Add(1)
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go func() {
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defer api.wg.Done()
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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api.ctx = ctx
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err := api.server.Serve(api.listener)
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if err != nil && !strings.Contains(err.Error(), "closed network connection") {
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logger.Error(err)
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}
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}()
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}
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// Shutdown stops any API listeners.
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func (api *RESTAPI) Shutdown() error {
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api.shutdownLock.Lock()
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defer api.shutdownLock.Unlock()
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if api.shutdown {
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logger.Debug("already shutdown")
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return nil
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}
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2016-12-15 13:19:41 +00:00
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logger.Info("stopping Cluster API")
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2016-12-15 13:07:19 +00:00
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// Cancel any outstanding ops
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api.server.SetKeepAlivesEnabled(false)
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api.listener.Close()
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api.wg.Wait()
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api.shutdown = true
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return nil
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}
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// RpcChan can be used by Cluster to read any
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// requests from this component
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func (api *RESTAPI) RpcChan() <-chan RPC {
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return api.rpcCh
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}
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2016-12-16 18:14:45 +00:00
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func (api *RESTAPI) versionHandler(w http.ResponseWriter, r *http.Request) {
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ctx, cancel := context.WithCancel(api.ctx)
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defer cancel()
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2016-12-15 18:08:46 +00:00
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rRpc := NewRPC(VersionRPC, nil)
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resp := MakeRPC(ctx, api.rpcCh, rRpc, true)
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if checkResponse(w, rRpc.Op(), resp) {
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v := resp.Data.(string)
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sendJSONResponse(w, 200, versionResp{v})
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}
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}
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2016-12-16 18:14:45 +00:00
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func (api *RESTAPI) memberListHandler(w http.ResponseWriter, r *http.Request) {
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ctx, cancel := context.WithCancel(api.ctx)
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defer cancel()
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2016-12-15 18:08:46 +00:00
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rRpc := NewRPC(MemberListRPC, nil)
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resp := MakeRPC(ctx, api.rpcCh, rRpc, true)
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if checkResponse(w, rRpc.Op(), resp) {
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data := resp.Data.([]peer.ID)
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var strPeers []string
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for _, p := range data {
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strPeers = append(strPeers, p.Pretty())
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}
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sendJSONResponse(w, 200, strPeers)
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}
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}
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2016-12-16 18:14:45 +00:00
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func (api *RESTAPI) pinHandler(w http.ResponseWriter, r *http.Request) {
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ctx, cancel := context.WithCancel(api.ctx)
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defer cancel()
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2016-12-15 18:08:46 +00:00
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if c := parseCidOrError(w, r); c != nil {
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rRpc := NewRPC(PinRPC, c)
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resp := MakeRPC(ctx, api.rpcCh, rRpc, true)
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if checkResponse(w, rRpc.Op(), resp) {
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sendAcceptedResponse(w)
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}
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}
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}
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func (api *RESTAPI) unpinHandler(w http.ResponseWriter, r *http.Request) {
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ctx, cancel := context.WithCancel(api.ctx)
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defer cancel()
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if c := parseCidOrError(w, r); c != nil {
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rRpc := NewRPC(UnpinRPC, c)
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resp := MakeRPC(ctx, api.rpcCh, rRpc, true)
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if checkResponse(w, rRpc.Op(), resp) {
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sendAcceptedResponse(w)
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}
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}
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}
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func (api *RESTAPI) pinListHandler(w http.ResponseWriter, r *http.Request) {
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ctx, cancel := context.WithCancel(api.ctx)
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defer cancel()
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rRpc := NewRPC(PinListRPC, nil)
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resp := MakeRPC(ctx, api.rpcCh, rRpc, true)
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if checkResponse(w, rRpc.Op(), resp) {
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data := resp.Data.([]*cid.Cid)
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sendJSONResponse(w, 200, data)
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}
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}
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func (api *RESTAPI) statusHandler(w http.ResponseWriter, r *http.Request) {
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ctx, cancel := context.WithCancel(api.ctx)
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defer cancel()
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rRpc := NewRPC(StatusRPC, nil)
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resp := MakeRPC(ctx, api.rpcCh, rRpc, true)
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if checkResponse(w, rRpc.Op(), resp) {
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sendStatusResponse(w, http.StatusOK, resp)
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}
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}
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func (api *RESTAPI) statusCidHandler(w http.ResponseWriter, r *http.Request) {
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ctx, cancel := context.WithCancel(api.ctx)
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defer cancel()
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2016-12-15 18:08:46 +00:00
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if c := parseCidOrError(w, r); c != nil {
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op := NewRPC(StatusCidRPC, c)
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resp := MakeRPC(ctx, api.rpcCh, op, true)
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if checkResponse(w, op.Op(), resp) {
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sendStatusCidResponse(w, http.StatusOK, resp)
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}
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}
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}
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func (api *RESTAPI) syncHandler(w http.ResponseWriter, r *http.Request) {
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ctx, cancel := context.WithCancel(api.ctx)
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defer cancel()
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rRpc := NewRPC(GlobalSyncRPC, nil)
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resp := MakeRPC(ctx, api.rpcCh, rRpc, true)
|
2016-12-06 21:29:59 +00:00
|
|
|
if checkResponse(w, rRpc.Op(), resp) {
|
2016-12-20 18:51:13 +00:00
|
|
|
sendStatusResponse(w, http.StatusAccepted, resp)
|
2016-12-15 18:08:46 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-12-16 18:14:45 +00:00
|
|
|
func (api *RESTAPI) syncCidHandler(w http.ResponseWriter, r *http.Request) {
|
2016-12-15 18:08:46 +00:00
|
|
|
ctx, cancel := context.WithCancel(api.ctx)
|
|
|
|
defer cancel()
|
|
|
|
|
|
|
|
if c := parseCidOrError(w, r); c != nil {
|
2016-12-19 17:35:24 +00:00
|
|
|
op := NewRPC(GlobalSyncCidRPC, c)
|
2016-12-15 18:08:46 +00:00
|
|
|
resp := MakeRPC(ctx, api.rpcCh, op, true)
|
|
|
|
if checkResponse(w, op.Op(), resp) {
|
2016-12-20 18:51:13 +00:00
|
|
|
sendStatusCidResponse(w, http.StatusOK, resp)
|
2016-12-02 18:33:39 +00:00
|
|
|
}
|
|
|
|
}
|
2016-12-15 18:08:46 +00:00
|
|
|
}
|
2016-12-02 18:33:39 +00:00
|
|
|
|
2016-12-15 18:08:46 +00:00
|
|
|
func parseCidOrError(w http.ResponseWriter, r *http.Request) *cid.Cid {
|
|
|
|
vars := mux.Vars(r)
|
|
|
|
hash := vars["hash"]
|
|
|
|
c, err := cid.Decode(hash)
|
|
|
|
if err != nil {
|
|
|
|
sendErrorResponse(w, 400, "error decoding Cid: "+err.Error())
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
return c
|
2016-12-02 18:33:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// checkResponse does basic checking on an RPCResponse. It takes care of
|
2016-12-07 16:28:46 +00:00
|
|
|
// using the http.ResponseWriter to send
|
2016-12-02 18:33:39 +00:00
|
|
|
// an error if the RPCResponse contains one. It also checks that the RPC
|
|
|
|
// response data can be casted back into the expected value. It returns false
|
|
|
|
// if the checks fail or an empty response is sent, and true otherwise.
|
2016-12-06 21:29:59 +00:00
|
|
|
func checkResponse(w http.ResponseWriter, op RPCOp, resp RPCResponse) bool {
|
2016-12-07 16:28:46 +00:00
|
|
|
if err := resp.Error; err != nil {
|
2016-12-02 18:33:39 +00:00
|
|
|
sendErrorResponse(w, 500, err.Error())
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
|
|
|
|
// Check thatwe can cast to the expected response format
|
|
|
|
ok := true
|
2016-12-06 21:29:59 +00:00
|
|
|
switch op {
|
2016-12-07 16:28:46 +00:00
|
|
|
case PinRPC: // Pin/Unpin only return errors
|
2016-12-02 18:33:39 +00:00
|
|
|
case UnpinRPC:
|
2016-12-20 18:51:13 +00:00
|
|
|
case StatusRPC, GlobalSyncRPC:
|
2016-12-19 17:35:24 +00:00
|
|
|
_, ok = resp.Data.([]GlobalPinInfo)
|
2016-12-20 18:51:13 +00:00
|
|
|
case StatusCidRPC, GlobalSyncCidRPC:
|
2016-12-19 17:35:24 +00:00
|
|
|
_, ok = resp.Data.(GlobalPinInfo)
|
2016-12-15 18:08:46 +00:00
|
|
|
case PinListRPC:
|
|
|
|
_, ok = resp.Data.([]*cid.Cid)
|
2016-12-02 18:33:39 +00:00
|
|
|
case VersionRPC:
|
|
|
|
_, ok = resp.Data.(string)
|
|
|
|
case MemberListRPC:
|
|
|
|
_, ok = resp.Data.([]peer.ID)
|
|
|
|
default:
|
|
|
|
ok = false
|
|
|
|
}
|
|
|
|
if !ok {
|
2016-12-09 19:54:46 +00:00
|
|
|
logger.Errorf("unexpected RPC Response format for %d:", op)
|
|
|
|
logger.Errorf("%+v", resp.Data)
|
2016-12-15 13:19:41 +00:00
|
|
|
sendErrorResponse(w, 500, "unexpected RPC Response format")
|
2016-12-02 18:33:39 +00:00
|
|
|
return false
|
|
|
|
}
|
|
|
|
|
|
|
|
return true
|
|
|
|
}
|
|
|
|
|
|
|
|
func sendEmptyResponse(w http.ResponseWriter) {
|
|
|
|
w.WriteHeader(http.StatusNoContent)
|
|
|
|
}
|
|
|
|
|
2016-12-07 16:28:46 +00:00
|
|
|
func sendAcceptedResponse(w http.ResponseWriter) {
|
|
|
|
w.WriteHeader(http.StatusAccepted)
|
|
|
|
}
|
|
|
|
|
2016-12-02 18:33:39 +00:00
|
|
|
func sendJSONResponse(w http.ResponseWriter, code int, resp interface{}) {
|
|
|
|
w.WriteHeader(code)
|
|
|
|
if err := json.NewEncoder(w).Encode(resp); err != nil {
|
|
|
|
panic(err)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
func sendErrorResponse(w http.ResponseWriter, code int, msg string) {
|
|
|
|
errorResp := errorResp{code, msg}
|
2016-12-15 13:19:41 +00:00
|
|
|
logger.Errorf("sending error response: %d: %s", code, msg)
|
2016-12-02 18:33:39 +00:00
|
|
|
sendJSONResponse(w, code, errorResp)
|
|
|
|
}
|
2016-12-15 18:08:46 +00:00
|
|
|
|
2016-12-19 17:35:24 +00:00
|
|
|
func transformPinToStatusCid(p GlobalPinInfo) statusCidResp {
|
|
|
|
s := statusCidResp{}
|
|
|
|
s.Cid = p.Cid.String()
|
|
|
|
s.Status = make(map[string]statusInfo)
|
|
|
|
for k, v := range p.Status {
|
|
|
|
s.Status[k.Pretty()] = statusInfo{
|
2016-12-20 18:51:13 +00:00
|
|
|
IPFS: v.IPFS.String(),
|
2016-12-19 17:35:24 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
return s
|
|
|
|
}
|
|
|
|
|
2016-12-20 18:51:13 +00:00
|
|
|
func sendStatusResponse(w http.ResponseWriter, code int, resp RPCResponse) {
|
2016-12-19 17:35:24 +00:00
|
|
|
data := resp.Data.([]GlobalPinInfo)
|
2016-12-15 18:08:46 +00:00
|
|
|
pins := make(statusResp, 0, len(data))
|
2016-12-19 17:35:24 +00:00
|
|
|
|
2016-12-15 18:08:46 +00:00
|
|
|
for _, d := range data {
|
2016-12-19 17:35:24 +00:00
|
|
|
pins = append(pins, transformPinToStatusCid(d))
|
2016-12-15 18:08:46 +00:00
|
|
|
}
|
2016-12-20 18:51:13 +00:00
|
|
|
sendJSONResponse(w, code, pins)
|
2016-12-15 18:08:46 +00:00
|
|
|
}
|
|
|
|
|
2016-12-20 18:51:13 +00:00
|
|
|
func sendStatusCidResponse(w http.ResponseWriter, code int, resp RPCResponse) {
|
2016-12-19 17:35:24 +00:00
|
|
|
data := resp.Data.(GlobalPinInfo)
|
|
|
|
st := transformPinToStatusCid(data)
|
2016-12-20 18:51:13 +00:00
|
|
|
sendJSONResponse(w, code, st)
|
2016-12-15 18:08:46 +00:00
|
|
|
}
|