api/api.go

   1 package api
   2
   3 import (
   4         "crypto/tls"
   5         "net"
   6         "net/http"
   7         "sync"
   8         "time"
   9
  10         "github.com/kr/secureheader"
  11         log "github.com/sirupsen/logrus"
  12         cmn "github.com/tendermint/tmlibs/common"
  13
  14         "github.com/bytom/accesstoken"
  15         "github.com/bytom/blockchain/txfeed"
  16         cfg "github.com/bytom/config"
  17         "github.com/bytom/dashboard"
  18         "github.com/bytom/equity"
  19         "github.com/bytom/errors"
  20         "github.com/bytom/mining/cpuminer"
  21         "github.com/bytom/mining/miningpool"
  22         "github.com/bytom/net/http/authn"
  23         "github.com/bytom/net/http/gzip"
  24         "github.com/bytom/net/http/httpjson"
  25         "github.com/bytom/net/http/static"
  26         "github.com/bytom/netsync"
  27         "github.com/bytom/protocol"
  28         "github.com/bytom/wallet"
  29 )
  30
  31 var (
  32         errNotAuthenticated = errors.New("not authenticated")
  33         httpReadTimeout     = 2 * time.Minute
  34         httpWriteTimeout    = time.Hour
  35 )
  36
  37 const (
  38         // SUCCESS indicates the rpc calling is successful.
  39         SUCCESS = "success"
  40         // FAIL indicated the rpc calling is failed.
  41         FAIL               = "fail"
  42         crosscoreRPCPrefix = "/rpc/"
  43 )
  44
  45 // Response describes the response standard.
  46 type Response struct {
  47         Status      string      `json:"status,omitempty"`
  48         Code        string      `json:"code,omitempty"`
  49         Msg         string      `json:"msg,omitempty"`
  50         ErrorDetail string      `json:"error_detail,omitempty"`
  51         Data        interface{} `json:"data,omitempty"`
  52 }
  53
  54 //NewSuccessResponse success response
  55 func NewSuccessResponse(data interface{}) Response {
  56         return Response{Status: SUCCESS, Data: data}
  57 }
  58
  59 //FormatErrResp format error response
  60 func FormatErrResp(err error) (response Response) {
  61         response = Response{Status: FAIL}
  62         root := errors.Root(err)
  63         // Some types cannot be used as map keys, for example slices.
  64         // If an error's underlying type is one of these, don't panic.
  65         // Just treat it like any other missing entry.
  66         defer func() {
  67                 if err := recover(); err != nil {
  68                         response.ErrorDetail = ""
  69                 }
  70         }()
  71
  72         if info, ok := respErrFormatter[root]; ok {
  73                 response.Code = info.ChainCode
  74                 response.Msg = info.Message
  75                 response.ErrorDetail = err.Error()
  76         } else {
  77                 response.Code = respErrFormatter[ErrDefault].ChainCode
  78                 response.Msg = respErrFormatter[ErrDefault].Message
  79                 response.ErrorDetail = err.Error()
  80         }
  81         return response
  82 }
  83
  84 //NewErrorResponse error response
  85 func NewErrorResponse(err error) Response {
  86         response := FormatErrResp(err)
  87         return response
  88 }
  89
  90 type waitHandler struct {
  91         h  http.Handler
  92         wg sync.WaitGroup
  93 }
  94
  95 func (wh *waitHandler) Set(h http.Handler) {
  96         wh.h = h
  97         wh.wg.Done()
  98 }
  99
 100 func (wh *waitHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 101         wh.wg.Wait()
 102         wh.h.ServeHTTP(w, req)
 103 }
 104
 105 // API is the scheduling center for server
 106 type API struct {
 107         sync          *netsync.SyncManager
 108         wallet        *wallet.Wallet
 109         accessTokens  *accesstoken.CredentialStore
 110         chain         *protocol.Chain
 111         server        *http.Server
 112         handler       http.Handler
 113         txFeedTracker *txfeed.Tracker
 114         cpuMiner      *cpuminer.CPUMiner
 115         miningPool    *miningpool.MiningPool
 116 }
 117
 118 func (a *API) initServer(config *cfg.Config) {
 119         // The waitHandler accepts incoming requests, but blocks until its underlying
 120         // handler is set, when the second phase is complete.
 121         var coreHandler waitHandler
 122         var handler http.Handler
 123
 124         coreHandler.wg.Add(1)
 125         mux := http.NewServeMux()
 126         mux.Handle("/", &coreHandler)
 127
 128         handler = mux
 129         if config.Auth.Disable == false {
 130                 handler = AuthHandler(handler, a.accessTokens)
 131         }
 132         handler = RedirectHandler(handler)
 133
 134         secureheader.DefaultConfig.PermitClearLoopback = true
 135         secureheader.DefaultConfig.HTTPSRedirect = false
 136         secureheader.DefaultConfig.Next = handler
 137
 138         a.server = &http.Server{
 139                 // Note: we should not set TLSConfig here;
 140                 // we took care of TLS with the listener in maybeUseTLS.
 141                 Handler:      secureheader.DefaultConfig,
 142                 ReadTimeout:  httpReadTimeout,
 143                 WriteTimeout: httpWriteTimeout,
 144                 // Disable HTTP/2 for now until the Go implementation is more stable.
 145                 // https://github.com/golang/go/issues/16450
 146                 // https://github.com/golang/go/issues/17071
 147                 TLSNextProto: map[string]func(*http.Server, *tls.Conn, http.Handler){},
 148         }
 149
 150         coreHandler.Set(a)
 151 }
 152
 153 // StartServer start the server
 154 func (a *API) StartServer(address string) {
 155         log.WithField("api address:", address).Info("Rpc listen")
 156         listener, err := net.Listen("tcp", address)
 157         if err != nil {
 158                 cmn.Exit(cmn.Fmt("Failed to register tcp port: %v", err))
 159         }
 160
 161         // The `Serve` call has to happen in its own goroutine because
 162         // it's blocking and we need to proceed to the rest of the core setup after
 163         // we call it.
 164         go func() {
 165                 if err := a.server.Serve(listener); err != nil {
 166                         log.WithField("error", errors.Wrap(err, "Serve")).Error("Rpc server")
 167                 }
 168         }()
 169 }
 170
 171 // NewAPI create and initialize the API
 172 func NewAPI(sync *netsync.SyncManager, wallet *wallet.Wallet, txfeeds *txfeed.Tracker, cpuMiner *cpuminer.CPUMiner, miningPool *miningpool.MiningPool, chain *protocol.Chain, config *cfg.Config, token *accesstoken.CredentialStore) *API {
 173         api := &API{
 174                 sync:          sync,
 175                 wallet:        wallet,
 176                 chain:         chain,
 177                 accessTokens:  token,
 178                 txFeedTracker: txfeeds,
 179                 cpuMiner:      cpuMiner,
 180                 miningPool:    miningPool,
 181         }
 182         api.buildHandler()
 183         api.initServer(config)
 184
 185         return api
 186 }
 187
 188 func (a *API) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 189         a.handler.ServeHTTP(rw, req)
 190 }
 191
 192 // buildHandler is in charge of all the rpc handling.
 193 func (a *API) buildHandler() {
 194         walletEnable := false
 195         m := http.NewServeMux()
 196         if a.wallet != nil {
 197                 walletEnable = true
 198
 199                 m.Handle("/create-account", jsonHandler(a.createAccount))
 200                 m.Handle("/list-accounts", jsonHandler(a.listAccounts))
 201                 m.Handle("/delete-account", jsonHandler(a.deleteAccount))
 202
 203                 m.Handle("/create-account-receiver", jsonHandler(a.createAccountReceiver))
 204                 m.Handle("/list-addresses", jsonHandler(a.listAddresses))
 205                 m.Handle("/validate-address", jsonHandler(a.validateAddress))
 206                 m.Handle("/list-pubkeys", jsonHandler(a.listPubKeys))
 207
 208                 m.Handle("/get-mining-address", jsonHandler(a.getMiningAddress))
 209                 m.Handle("/set-mining-address", jsonHandler(a.setMiningAddress))
 210
 211                 m.Handle("/create-asset", jsonHandler(a.createAsset))
 212                 m.Handle("/update-asset-alias", jsonHandler(a.updateAssetAlias))
 213                 m.Handle("/get-asset", jsonHandler(a.getAsset))
 214                 m.Handle("/list-assets", jsonHandler(a.listAssets))
 215
 216                 m.Handle("/create-key", jsonHandler(a.pseudohsmCreateKey))
 217                 m.Handle("/list-keys", jsonHandler(a.pseudohsmListKeys))
 218                 m.Handle("/delete-key", jsonHandler(a.pseudohsmDeleteKey))
 219                 m.Handle("/reset-key-password", jsonHandler(a.pseudohsmResetPassword))
 220                 m.Handle("/sign-message", jsonHandler(a.signMessage))
 221
 222                 m.Handle("/build-transaction", jsonHandler(a.build))
 223                 m.Handle("/sign-transaction", jsonHandler(a.pseudohsmSignTemplates))
 224
 225                 m.Handle("/get-transaction", jsonHandler(a.getTransaction))
 226                 m.Handle("/list-transactions", jsonHandler(a.listTransactions))
 227
 228                 m.Handle("/list-balances", jsonHandler(a.listBalances))
 229                 m.Handle("/list-unspent-outputs", jsonHandler(a.listUnspentOutputs))
 230
 231                 m.Handle("/backup-wallet", jsonHandler(a.backupWalletImage))
 232                 m.Handle("/restore-wallet", jsonHandler(a.restoreWalletImage))
 233                 m.Handle("/rescan-wallet", jsonHandler(a.rescanWallet))
 234                 m.Handle("/wallet-info", jsonHandler(a.getWalletInfo))
 235         } else {
 236                 log.Warn("Please enable wallet")
 237         }
 238
 239         m.Handle("/", alwaysError(errors.New("not Found")))
 240         m.Handle("/error", jsonHandler(a.walletError))
 241
 242         m.Handle("/create-access-token", jsonHandler(a.createAccessToken))
 243         m.Handle("/list-access-tokens", jsonHandler(a.listAccessTokens))
 244         m.Handle("/delete-access-token", jsonHandler(a.deleteAccessToken))
 245         m.Handle("/check-access-token", jsonHandler(a.checkAccessToken))
 246
 247         m.Handle("/create-transaction-feed", jsonHandler(a.createTxFeed))
 248         m.Handle("/get-transaction-feed", jsonHandler(a.getTxFeed))
 249         m.Handle("/update-transaction-feed", jsonHandler(a.updateTxFeed))
 250         m.Handle("/delete-transaction-feed", jsonHandler(a.deleteTxFeed))
 251         m.Handle("/list-transaction-feeds", jsonHandler(a.listTxFeeds))
 252
 253         m.Handle("/submit-transaction", jsonHandler(a.submit))
 254         m.Handle("/estimate-transaction-gas", jsonHandler(a.estimateTxGas))
 255
 256         m.Handle("/get-unconfirmed-transaction", jsonHandler(a.getUnconfirmedTx))
 257         m.Handle("/list-unconfirmed-transactions", jsonHandler(a.listUnconfirmedTxs))
 258         m.Handle("/decode-raw-transaction", jsonHandler(a.decodeRawTransaction))
 259
 260         m.Handle("/get-block-hash", jsonHandler(a.getBestBlockHash))
 261         m.Handle("/get-block-header", jsonHandler(a.getBlockHeader))
 262         m.Handle("/get-block", jsonHandler(a.getBlock))
 263         m.Handle("/get-block-count", jsonHandler(a.getBlockCount))
 264         m.Handle("/get-difficulty", jsonHandler(a.getDifficulty))
 265         m.Handle("/get-hash-rate", jsonHandler(a.getHashRate))
 266
 267         m.Handle("/is-mining", jsonHandler(a.isMining))
 268         m.Handle("/set-mining", jsonHandler(a.setMining))
 269
 270         m.Handle("/get-work", jsonHandler(a.getWork))
 271         m.Handle("/get-work-json", jsonHandler(a.getWorkJSON))
 272         m.Handle("/submit-work", jsonHandler(a.submitWork))
 273         m.Handle("/submit-work-json", jsonHandler(a.submitWorkJSON))
 274
 275         m.Handle("/verify-message", jsonHandler(a.verifyMessage))
 276         m.Handle("/decode-program", jsonHandler(a.decodeProgram))
 277         m.Handle("/compile", jsonHandler(a.compileEquity))
 278
 279         m.Handle("/gas-rate", jsonHandler(a.gasRate))
 280         m.Handle("/net-info", jsonHandler(a.getNetInfo))
 281
 282         m.Handle("/list-peers", jsonHandler(a.listPeers))
 283         m.Handle("/disconnect-peer", jsonHandler(a.disconnectPeer))
 284         m.Handle("/connect-peer", jsonHandler(a.connectPeer))
 285
 286         handler := latencyHandler(m, walletEnable)
 287         handler = maxBytesHandler(handler) // TODO(tessr): consider moving this to non-core specific mux
 288         handler = webAssetsHandler(handler)
 289         handler = gzip.Handler{Handler: handler}
 290
 291         a.handler = handler
 292 }
 293
 294 func maxBytesHandler(h http.Handler) http.Handler {
 295         const maxReqSize = 1e7 // 10MB
 296         return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 297                 // A block can easily be bigger than maxReqSize, but everything
 298                 // else should be pretty small.
 299                 if req.URL.Path != crosscoreRPCPrefix+"signer/sign-block" {
 300                         req.Body = http.MaxBytesReader(w, req.Body, maxReqSize)
 301                 }
 302                 h.ServeHTTP(w, req)
 303         })
 304 }
 305
 306 // json Handler
 307 func jsonHandler(f interface{}) http.Handler {
 308         h, err := httpjson.Handler(f, errorFormatter.Write)
 309         if err != nil {
 310                 panic(err)
 311         }
 312         return h
 313 }
 314
 315 // error Handler
 316 func alwaysError(err error) http.Handler {
 317         return jsonHandler(func() error { return err })
 318 }
 319
 320 func webAssetsHandler(next http.Handler) http.Handler {
 321         mux := http.NewServeMux()
 322         mux.Handle("/dashboard/", http.StripPrefix("/dashboard/", static.Handler{
 323                 Assets:  dashboard.Files,
 324                 Default: "index.html",
 325         }))
 326         mux.Handle("/equity/", http.StripPrefix("/equity/", static.Handler{
 327                 Assets:  equity.Files,
 328                 Default: "index.html",
 329         }))
 330         mux.Handle("/", next)
 331
 332         return mux
 333 }
 334
 335 // AuthHandler access token auth Handler
 336 func AuthHandler(handler http.Handler, accessTokens *accesstoken.CredentialStore) http.Handler {
 337         authenticator := authn.NewAPI(accessTokens)
 338
 339         return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
 340                 // TODO(tessr): check that this path exists; return early if this path isn't legit
 341                 req, err := authenticator.Authenticate(req)
 342                 if err != nil {
 343                         log.WithField("error", errors.Wrap(err, "Serve")).Error("Authenticate fail")
 344                         err = errors.Sub(errNotAuthenticated, err)
 345                         errorFormatter.Write(req.Context(), rw, err)
 346                         return
 347                 }
 348                 handler.ServeHTTP(rw, req)
 349         })
 350 }
 351
 352 // RedirectHandler redirect to dashboard handler
 353 func RedirectHandler(next http.Handler) http.Handler {
 354         return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 355                 if req.URL.Path == "/" {
 356                         http.Redirect(w, req, "/dashboard/", http.StatusFound)
 357                         return
 358                 }
 359                 next.ServeHTTP(w, req)
 360         })
 361 }
 362
 363 // latencyHandler take latency for the request url path, and redirect url path to wait-disable when wallet is closed
 364 func latencyHandler(m *http.ServeMux, walletEnable bool) http.Handler {
 365         return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 366                 // latency for the request url path
 367                 if l := latency(m, req); l != nil {
 368                         defer l.RecordSince(time.Now())
 369                 }
 370
 371                 // when the wallet is not been opened and the url path is not been found, modify url path to error,
 372                 // and redirect handler to error
 373                 if _, pattern := m.Handler(req); pattern != req.URL.Path && !walletEnable {
 374                         req.URL.Path = "/error"
 375                         walletRedirectHandler(w, req)
 376                         return
 377                 }
 378
 379                 m.ServeHTTP(w, req)
 380         })
 381 }
 382
 383 // walletRedirectHandler redirect to error when the wallet is closed
 384 func walletRedirectHandler(w http.ResponseWriter, req *http.Request) {
 385         h := http.RedirectHandler(req.URL.String(), http.StatusMovedPermanently)
 386         h.ServeHTTP(w, req)
 387 }