sdk/go/keepclient/keepclient_test.go

   1 package keepclient
   2
   3 import (
   4         "crypto/md5"
   5         "flag"
   6         "fmt"
   7         "git.curoverse.com/arvados.git/sdk/go/arvadosclient"
   8         "git.curoverse.com/arvados.git/sdk/go/arvadostest"
   9         "git.curoverse.com/arvados.git/sdk/go/streamer"
  10         . "gopkg.in/check.v1"
  11         "io"
  12         "io/ioutil"
  13         "log"
  14         "net"
  15         "net/http"
  16         "os"
  17         "testing"
  18 )
  19
  20 // Gocheck boilerplate
  21 func Test(t *testing.T) {
  22         TestingT(t)
  23 }
  24
  25 // Gocheck boilerplate
  26 var _ = Suite(&ServerRequiredSuite{})
  27 var _ = Suite(&StandaloneSuite{})
  28
  29 var no_server = flag.Bool("no-server", false, "Skip 'ServerRequireSuite'")
  30
  31 // Tests that require the Keep server running
  32 type ServerRequiredSuite struct{}
  33
  34 // Standalone tests
  35 type StandaloneSuite struct{}
  36
  37 func pythonDir() string {
  38         cwd, _ := os.Getwd()
  39         return fmt.Sprintf("%s/../../python/tests", cwd)
  40 }
  41
  42 func (s *ServerRequiredSuite) SetUpSuite(c *C) {
  43         if *no_server {
  44                 c.Skip("Skipping tests that require server")
  45                 return
  46         }
  47         arvadostest.StartAPI()
  48         arvadostest.StartKeep(2, false)
  49 }
  50
  51 func (s *ServerRequiredSuite) TearDownSuite(c *C) {
  52         if *no_server {
  53                 return
  54         }
  55         arvadostest.StopKeep(2)
  56         arvadostest.StopAPI()
  57 }
  58
  59 func (s *ServerRequiredSuite) TestMakeKeepClient(c *C) {
  60         arv, err := arvadosclient.MakeArvadosClient()
  61         c.Assert(err, Equals, nil)
  62
  63         kc, err := MakeKeepClient(&arv)
  64
  65         c.Assert(err, Equals, nil)
  66         c.Check(len(kc.LocalRoots()), Equals, 2)
  67         for _, root := range kc.LocalRoots() {
  68                 c.Check(root, Matches, "http://localhost:\\d+")
  69         }
  70 }
  71
  72 func (s *ServerRequiredSuite) TestDefaultReplications(c *C) {
  73         arv, err := arvadosclient.MakeArvadosClient()
  74         c.Assert(err, Equals, nil)
  75
  76         kc, err := MakeKeepClient(&arv)
  77         c.Assert(kc.Want_replicas, Equals, 2)
  78
  79         arv.DiscoveryDoc["defaultCollectionReplication"] = 3.0
  80         kc, err = MakeKeepClient(&arv)
  81         c.Assert(kc.Want_replicas, Equals, 3)
  82
  83         arv.DiscoveryDoc["defaultCollectionReplication"] = 1.0
  84         kc, err = MakeKeepClient(&arv)
  85         c.Assert(kc.Want_replicas, Equals, 1)
  86 }
  87
  88 type StubPutHandler struct {
  89         c              *C
  90         expectPath     string
  91         expectApiToken string
  92         expectBody     string
  93         handled        chan string
  94 }
  95
  96 func (sph StubPutHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
  97         sph.c.Check(req.URL.Path, Equals, "/"+sph.expectPath)
  98         sph.c.Check(req.Header.Get("Authorization"), Equals, fmt.Sprintf("OAuth2 %s", sph.expectApiToken))
  99         body, err := ioutil.ReadAll(req.Body)
 100         sph.c.Check(err, Equals, nil)
 101         sph.c.Check(body, DeepEquals, []byte(sph.expectBody))
 102         resp.WriteHeader(200)
 103         sph.handled <- fmt.Sprintf("http://%s", req.Host)
 104 }
 105
 106 func RunFakeKeepServer(st http.Handler) (ks KeepServer) {
 107         var err error
 108         ks.listener, err = net.ListenTCP("tcp", &net.TCPAddr{Port: 0})
 109         if err != nil {
 110                 panic(fmt.Sprintf("Could not listen on any port"))
 111         }
 112         ks.url = fmt.Sprintf("http://%s", ks.listener.Addr().String())
 113         go http.Serve(ks.listener, st)
 114         return
 115 }
 116
 117 func UploadToStubHelper(c *C, st http.Handler, f func(*KeepClient, string,
 118         io.ReadCloser, io.WriteCloser, chan uploadStatus)) {
 119
 120         ks := RunFakeKeepServer(st)
 121         defer ks.listener.Close()
 122
 123         arv, _ := arvadosclient.MakeArvadosClient()
 124         arv.ApiToken = "abc123"
 125
 126         kc, _ := MakeKeepClient(&arv)
 127
 128         reader, writer := io.Pipe()
 129         upload_status := make(chan uploadStatus)
 130
 131         f(kc, ks.url, reader, writer, upload_status)
 132 }
 133
 134 func (s *StandaloneSuite) TestUploadToStubKeepServer(c *C) {
 135         log.Printf("TestUploadToStubKeepServer")
 136
 137         st := StubPutHandler{
 138                 c,
 139                 "acbd18db4cc2f85cedef654fccc4a4d8",
 140                 "abc123",
 141                 "foo",
 142                 make(chan string)}
 143
 144         UploadToStubHelper(c, st,
 145                 func(kc *KeepClient, url string, reader io.ReadCloser,
 146                         writer io.WriteCloser, upload_status chan uploadStatus) {
 147
 148                         go kc.uploadToKeepServer(url, st.expectPath, reader, upload_status, int64(len("foo")), "TestUploadToStubKeepServer")
 149
 150                         writer.Write([]byte("foo"))
 151                         writer.Close()
 152
 153                         <-st.handled
 154                         status := <-upload_status
 155                         c.Check(status, DeepEquals, uploadStatus{nil, fmt.Sprintf("%s/%s", url, st.expectPath), 200, 1, ""})
 156                 })
 157
 158         log.Printf("TestUploadToStubKeepServer done")
 159 }
 160
 161 func (s *StandaloneSuite) TestUploadToStubKeepServerBufferReader(c *C) {
 162         log.Printf("TestUploadToStubKeepServerBufferReader")
 163
 164         st := StubPutHandler{
 165                 c,
 166                 "acbd18db4cc2f85cedef654fccc4a4d8",
 167                 "abc123",
 168                 "foo",
 169                 make(chan string)}
 170
 171         UploadToStubHelper(c, st,
 172                 func(kc *KeepClient, url string, reader io.ReadCloser,
 173                         writer io.WriteCloser, upload_status chan uploadStatus) {
 174
 175                         tr := streamer.AsyncStreamFromReader(512, reader)
 176                         defer tr.Close()
 177
 178                         br1 := tr.MakeStreamReader()
 179
 180                         go kc.uploadToKeepServer(url, st.expectPath, br1, upload_status, 3, "TestUploadToStubKeepServerBufferReader")
 181
 182                         writer.Write([]byte("foo"))
 183                         writer.Close()
 184
 185                         <-st.handled
 186
 187                         status := <-upload_status
 188                         c.Check(status, DeepEquals, uploadStatus{nil, fmt.Sprintf("%s/%s", url, st.expectPath), 200, 1, ""})
 189                 })
 190
 191         log.Printf("TestUploadToStubKeepServerBufferReader done")
 192 }
 193
 194 type FailHandler struct {
 195         handled chan string
 196 }
 197
 198 func (fh FailHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
 199         resp.WriteHeader(500)
 200         fh.handled <- fmt.Sprintf("http://%s", req.Host)
 201 }
 202
 203 type FailThenSucceedHandler struct {
 204         handled        chan string
 205         count          int
 206         successhandler StubGetHandler
 207 }
 208
 209 func (fh *FailThenSucceedHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
 210         if fh.count == 0 {
 211                 resp.WriteHeader(500)
 212                 fh.count += 1
 213                 fh.handled <- fmt.Sprintf("http://%s", req.Host)
 214         } else {
 215                 fh.successhandler.ServeHTTP(resp, req)
 216         }
 217 }
 218
 219 type Error404Handler struct {
 220         handled chan string
 221 }
 222
 223 func (fh Error404Handler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
 224         resp.WriteHeader(404)
 225         fh.handled <- fmt.Sprintf("http://%s", req.Host)
 226 }
 227
 228 func (s *StandaloneSuite) TestFailedUploadToStubKeepServer(c *C) {
 229         log.Printf("TestFailedUploadToStubKeepServer")
 230
 231         st := FailHandler{
 232                 make(chan string)}
 233
 234         hash := "acbd18db4cc2f85cedef654fccc4a4d8"
 235
 236         UploadToStubHelper(c, st,
 237                 func(kc *KeepClient, url string, reader io.ReadCloser,
 238                         writer io.WriteCloser, upload_status chan uploadStatus) {
 239
 240                         go kc.uploadToKeepServer(url, hash, reader, upload_status, 3, "TestFailedUploadToStubKeepServer")
 241
 242                         writer.Write([]byte("foo"))
 243                         writer.Close()
 244
 245                         <-st.handled
 246
 247                         status := <-upload_status
 248                         c.Check(status.url, Equals, fmt.Sprintf("%s/%s", url, hash))
 249                         c.Check(status.statusCode, Equals, 500)
 250                 })
 251         log.Printf("TestFailedUploadToStubKeepServer done")
 252 }
 253
 254 type KeepServer struct {
 255         listener net.Listener
 256         url      string
 257 }
 258
 259 func RunSomeFakeKeepServers(st http.Handler, n int) (ks []KeepServer) {
 260         ks = make([]KeepServer, n)
 261
 262         for i := 0; i < n; i += 1 {
 263                 ks[i] = RunFakeKeepServer(st)
 264         }
 265
 266         return ks
 267 }
 268
 269 func (s *StandaloneSuite) TestPutB(c *C) {
 270         log.Printf("TestPutB")
 271
 272         hash := Md5String("foo")
 273
 274         st := StubPutHandler{
 275                 c,
 276                 hash,
 277                 "abc123",
 278                 "foo",
 279                 make(chan string, 5)}
 280
 281         arv, _ := arvadosclient.MakeArvadosClient()
 282         kc, _ := MakeKeepClient(&arv)
 283
 284         kc.Want_replicas = 2
 285         arv.ApiToken = "abc123"
 286         localRoots := make(map[string]string)
 287         writableLocalRoots := make(map[string]string)
 288
 289         ks := RunSomeFakeKeepServers(st, 5)
 290
 291         for i, k := range ks {
 292                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 293                 writableLocalRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 294                 defer k.listener.Close()
 295         }
 296
 297         kc.SetServiceRoots(localRoots, writableLocalRoots, nil)
 298
 299         kc.PutB([]byte("foo"))
 300
 301         shuff := NewRootSorter(
 302                 kc.LocalRoots(), Md5String("foo")).GetSortedRoots()
 303
 304         s1 := <-st.handled
 305         s2 := <-st.handled
 306         c.Check((s1 == shuff[0] && s2 == shuff[1]) ||
 307                 (s1 == shuff[1] && s2 == shuff[0]),
 308                 Equals,
 309                 true)
 310
 311         log.Printf("TestPutB done")
 312 }
 313
 314 func (s *StandaloneSuite) TestPutHR(c *C) {
 315         log.Printf("TestPutHR")
 316
 317         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
 318
 319         st := StubPutHandler{
 320                 c,
 321                 hash,
 322                 "abc123",
 323                 "foo",
 324                 make(chan string, 5)}
 325
 326         arv, _ := arvadosclient.MakeArvadosClient()
 327         kc, _ := MakeKeepClient(&arv)
 328
 329         kc.Want_replicas = 2
 330         arv.ApiToken = "abc123"
 331         localRoots := make(map[string]string)
 332         writableLocalRoots := make(map[string]string)
 333
 334         ks := RunSomeFakeKeepServers(st, 5)
 335
 336         for i, k := range ks {
 337                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 338                 writableLocalRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 339                 defer k.listener.Close()
 340         }
 341
 342         kc.SetServiceRoots(localRoots, writableLocalRoots, nil)
 343
 344         reader, writer := io.Pipe()
 345
 346         go func() {
 347                 writer.Write([]byte("foo"))
 348                 writer.Close()
 349         }()
 350
 351         kc.PutHR(hash, reader, 3)
 352
 353         shuff := NewRootSorter(kc.LocalRoots(), hash).GetSortedRoots()
 354         log.Print(shuff)
 355
 356         s1 := <-st.handled
 357         s2 := <-st.handled
 358
 359         c.Check((s1 == shuff[0] && s2 == shuff[1]) ||
 360                 (s1 == shuff[1] && s2 == shuff[0]),
 361                 Equals,
 362                 true)
 363
 364         log.Printf("TestPutHR done")
 365 }
 366
 367 func (s *StandaloneSuite) TestPutWithFail(c *C) {
 368         log.Printf("TestPutWithFail")
 369
 370         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
 371
 372         st := StubPutHandler{
 373                 c,
 374                 hash,
 375                 "abc123",
 376                 "foo",
 377                 make(chan string, 4)}
 378
 379         fh := FailHandler{
 380                 make(chan string, 1)}
 381
 382         arv, err := arvadosclient.MakeArvadosClient()
 383         kc, _ := MakeKeepClient(&arv)
 384
 385         kc.Want_replicas = 2
 386         arv.ApiToken = "abc123"
 387         localRoots := make(map[string]string)
 388         writableLocalRoots := make(map[string]string)
 389
 390         ks1 := RunSomeFakeKeepServers(st, 4)
 391         ks2 := RunSomeFakeKeepServers(fh, 1)
 392
 393         for i, k := range ks1 {
 394                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 395                 writableLocalRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 396                 defer k.listener.Close()
 397         }
 398         for i, k := range ks2 {
 399                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i+len(ks1))] = k.url
 400                 writableLocalRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i+len(ks1))] = k.url
 401                 defer k.listener.Close()
 402         }
 403
 404         kc.SetServiceRoots(localRoots, writableLocalRoots, nil)
 405
 406         shuff := NewRootSorter(
 407                 kc.LocalRoots(), Md5String("foo")).GetSortedRoots()
 408
 409         phash, replicas, err := kc.PutB([]byte("foo"))
 410
 411         <-fh.handled
 412
 413         c.Check(err, Equals, nil)
 414         c.Check(phash, Equals, "")
 415         c.Check(replicas, Equals, 2)
 416
 417         s1 := <-st.handled
 418         s2 := <-st.handled
 419
 420         c.Check((s1 == shuff[1] && s2 == shuff[2]) ||
 421                 (s1 == shuff[2] && s2 == shuff[1]),
 422                 Equals,
 423                 true)
 424 }
 425
 426 func (s *StandaloneSuite) TestPutWithTooManyFail(c *C) {
 427         log.Printf("TestPutWithTooManyFail")
 428
 429         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
 430
 431         st := StubPutHandler{
 432                 c,
 433                 hash,
 434                 "abc123",
 435                 "foo",
 436                 make(chan string, 1)}
 437
 438         fh := FailHandler{
 439                 make(chan string, 4)}
 440
 441         arv, err := arvadosclient.MakeArvadosClient()
 442         kc, _ := MakeKeepClient(&arv)
 443
 444         kc.Want_replicas = 2
 445         kc.Retries = 0
 446         arv.ApiToken = "abc123"
 447         localRoots := make(map[string]string)
 448         writableLocalRoots := make(map[string]string)
 449
 450         ks1 := RunSomeFakeKeepServers(st, 1)
 451         ks2 := RunSomeFakeKeepServers(fh, 4)
 452
 453         for i, k := range ks1 {
 454                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 455                 writableLocalRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 456                 defer k.listener.Close()
 457         }
 458         for i, k := range ks2 {
 459                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i+len(ks1))] = k.url
 460                 writableLocalRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i+len(ks1))] = k.url
 461                 defer k.listener.Close()
 462         }
 463
 464         kc.SetServiceRoots(localRoots, writableLocalRoots, nil)
 465
 466         _, replicas, err := kc.PutB([]byte("foo"))
 467
 468         c.Check(err, Equals, InsufficientReplicasError)
 469         c.Check(replicas, Equals, 1)
 470         c.Check(<-st.handled, Equals, ks1[0].url)
 471
 472         log.Printf("TestPutWithTooManyFail done")
 473 }
 474
 475 type StubGetHandler struct {
 476         c              *C
 477         expectPath     string
 478         expectApiToken string
 479         httpStatus     int
 480         body           []byte
 481 }
 482
 483 func (sgh StubGetHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
 484         sgh.c.Check(req.URL.Path, Equals, "/"+sgh.expectPath)
 485         sgh.c.Check(req.Header.Get("Authorization"), Equals, fmt.Sprintf("OAuth2 %s", sgh.expectApiToken))
 486         resp.WriteHeader(sgh.httpStatus)
 487         resp.Header().Set("Content-Length", fmt.Sprintf("%d", len(sgh.body)))
 488         resp.Write(sgh.body)
 489 }
 490
 491 func (s *StandaloneSuite) TestGet(c *C) {
 492         log.Printf("TestGet")
 493
 494         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
 495
 496         st := StubGetHandler{
 497                 c,
 498                 hash,
 499                 "abc123",
 500                 http.StatusOK,
 501                 []byte("foo")}
 502
 503         ks := RunFakeKeepServer(st)
 504         defer ks.listener.Close()
 505
 506         arv, err := arvadosclient.MakeArvadosClient()
 507         kc, _ := MakeKeepClient(&arv)
 508         arv.ApiToken = "abc123"
 509         kc.SetServiceRoots(map[string]string{"x": ks.url}, nil, nil)
 510
 511         r, n, url2, err := kc.Get(hash)
 512         defer r.Close()
 513         c.Check(err, Equals, nil)
 514         c.Check(n, Equals, int64(3))
 515         c.Check(url2, Equals, fmt.Sprintf("%s/%s", ks.url, hash))
 516
 517         content, err2 := ioutil.ReadAll(r)
 518         c.Check(err2, Equals, nil)
 519         c.Check(content, DeepEquals, []byte("foo"))
 520
 521         log.Printf("TestGet done")
 522 }
 523
 524 func (s *StandaloneSuite) TestGet404(c *C) {
 525         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
 526
 527         st := Error404Handler{make(chan string, 1)}
 528
 529         ks := RunFakeKeepServer(st)
 530         defer ks.listener.Close()
 531
 532         arv, err := arvadosclient.MakeArvadosClient()
 533         kc, _ := MakeKeepClient(&arv)
 534         arv.ApiToken = "abc123"
 535         kc.SetServiceRoots(map[string]string{"x": ks.url}, nil, nil)
 536
 537         r, n, url2, err := kc.Get(hash)
 538         c.Check(err, Equals, BlockNotFound)
 539         c.Check(n, Equals, int64(0))
 540         c.Check(url2, Equals, "")
 541         c.Check(r, Equals, nil)
 542 }
 543
 544 func (s *StandaloneSuite) TestGetFail(c *C) {
 545         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
 546
 547         st := FailHandler{make(chan string, 1)}
 548
 549         ks := RunFakeKeepServer(st)
 550         defer ks.listener.Close()
 551
 552         arv, err := arvadosclient.MakeArvadosClient()
 553         kc, _ := MakeKeepClient(&arv)
 554         arv.ApiToken = "abc123"
 555         kc.SetServiceRoots(map[string]string{"x": ks.url}, nil, nil)
 556         kc.Retries = 0
 557
 558         r, n, url2, err := kc.Get(hash)
 559         c.Check(err, Equals, BlockNotFound)
 560         c.Check(n, Equals, int64(0))
 561         c.Check(url2, Equals, "")
 562         c.Check(r, Equals, nil)
 563 }
 564
 565 func (s *StandaloneSuite) TestGetFailRetry(c *C) {
 566         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
 567
 568         st := &FailThenSucceedHandler{make(chan string, 1), 0,
 569                 StubGetHandler{
 570                         c,
 571                         hash,
 572                         "abc123",
 573                         http.StatusOK,
 574                         []byte("foo")}}
 575
 576         ks := RunFakeKeepServer(st)
 577         defer ks.listener.Close()
 578
 579         arv, err := arvadosclient.MakeArvadosClient()
 580         kc, _ := MakeKeepClient(&arv)
 581         arv.ApiToken = "abc123"
 582         kc.SetServiceRoots(map[string]string{"x": ks.url}, nil, nil)
 583
 584         r, n, url2, err := kc.Get(hash)
 585         defer r.Close()
 586         c.Check(err, Equals, nil)
 587         c.Check(n, Equals, int64(3))
 588         c.Check(url2, Equals, fmt.Sprintf("%s/%s", ks.url, hash))
 589
 590         content, err2 := ioutil.ReadAll(r)
 591         c.Check(err2, Equals, nil)
 592         c.Check(content, DeepEquals, []byte("foo"))
 593 }
 594
 595 func (s *StandaloneSuite) TestGetNetError(c *C) {
 596         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
 597
 598         arv, err := arvadosclient.MakeArvadosClient()
 599         kc, _ := MakeKeepClient(&arv)
 600         arv.ApiToken = "abc123"
 601         kc.SetServiceRoots(map[string]string{"x": "http://localhost:62222"}, nil, nil)
 602
 603         r, n, url2, err := kc.Get(hash)
 604         c.Check(err, Equals, BlockNotFound)
 605         c.Check(n, Equals, int64(0))
 606         c.Check(url2, Equals, "")
 607         c.Check(r, Equals, nil)
 608 }
 609
 610 func (s *StandaloneSuite) TestGetWithServiceHint(c *C) {
 611         uuid := "zzzzz-bi6l4-123451234512345"
 612         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
 613
 614         // This one shouldn't be used:
 615         ks0 := RunFakeKeepServer(StubGetHandler{
 616                 c,
 617                 "error if used",
 618                 "abc123",
 619                 http.StatusOK,
 620                 []byte("foo")})
 621         defer ks0.listener.Close()
 622         // This one should be used:
 623         ks := RunFakeKeepServer(StubGetHandler{
 624                 c,
 625                 hash + "+K@" + uuid,
 626                 "abc123",
 627                 http.StatusOK,
 628                 []byte("foo")})
 629         defer ks.listener.Close()
 630
 631         arv, err := arvadosclient.MakeArvadosClient()
 632         kc, _ := MakeKeepClient(&arv)
 633         arv.ApiToken = "abc123"
 634         kc.SetServiceRoots(
 635                 map[string]string{"x": ks0.url},
 636                 nil,
 637                 map[string]string{uuid: ks.url})
 638
 639         r, n, uri, err := kc.Get(hash + "+K@" + uuid)
 640         defer r.Close()
 641         c.Check(err, Equals, nil)
 642         c.Check(n, Equals, int64(3))
 643         c.Check(uri, Equals, fmt.Sprintf("%s/%s", ks.url, hash+"+K@"+uuid))
 644
 645         content, err := ioutil.ReadAll(r)
 646         c.Check(err, Equals, nil)
 647         c.Check(content, DeepEquals, []byte("foo"))
 648 }
 649
 650 // Use a service hint to fetch from a local disk service, overriding
 651 // rendezvous probe order.
 652 func (s *StandaloneSuite) TestGetWithLocalServiceHint(c *C) {
 653         uuid := "zzzzz-bi6l4-zzzzzzzzzzzzzzz"
 654         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
 655
 656         // This one shouldn't be used, although it appears first in
 657         // rendezvous probe order:
 658         ks0 := RunFakeKeepServer(StubGetHandler{
 659                 c,
 660                 "error if used",
 661                 "abc123",
 662                 http.StatusOK,
 663                 []byte("foo")})
 664         defer ks0.listener.Close()
 665         // This one should be used:
 666         ks := RunFakeKeepServer(StubGetHandler{
 667                 c,
 668                 hash + "+K@" + uuid,
 669                 "abc123",
 670                 http.StatusOK,
 671                 []byte("foo")})
 672         defer ks.listener.Close()
 673
 674         arv, err := arvadosclient.MakeArvadosClient()
 675         kc, _ := MakeKeepClient(&arv)
 676         arv.ApiToken = "abc123"
 677         kc.SetServiceRoots(
 678                 map[string]string{
 679                         "zzzzz-bi6l4-yyyyyyyyyyyyyyy": ks0.url,
 680                         "zzzzz-bi6l4-xxxxxxxxxxxxxxx": ks0.url,
 681                         "zzzzz-bi6l4-wwwwwwwwwwwwwww": ks0.url,
 682                         uuid: ks.url},
 683                 nil,
 684                 map[string]string{
 685                         "zzzzz-bi6l4-yyyyyyyyyyyyyyy": ks0.url,
 686                         "zzzzz-bi6l4-xxxxxxxxxxxxxxx": ks0.url,
 687                         "zzzzz-bi6l4-wwwwwwwwwwwwwww": ks0.url,
 688                         uuid: ks.url},
 689         )
 690
 691         r, n, uri, err := kc.Get(hash + "+K@" + uuid)
 692         defer r.Close()
 693         c.Check(err, Equals, nil)
 694         c.Check(n, Equals, int64(3))
 695         c.Check(uri, Equals, fmt.Sprintf("%s/%s", ks.url, hash+"+K@"+uuid))
 696
 697         content, err := ioutil.ReadAll(r)
 698         c.Check(err, Equals, nil)
 699         c.Check(content, DeepEquals, []byte("foo"))
 700 }
 701
 702 func (s *StandaloneSuite) TestGetWithServiceHintFailoverToLocals(c *C) {
 703         uuid := "zzzzz-bi6l4-123451234512345"
 704         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
 705
 706         ksLocal := RunFakeKeepServer(StubGetHandler{
 707                 c,
 708                 hash + "+K@" + uuid,
 709                 "abc123",
 710                 http.StatusOK,
 711                 []byte("foo")})
 712         defer ksLocal.listener.Close()
 713         ksGateway := RunFakeKeepServer(StubGetHandler{
 714                 c,
 715                 hash + "+K@" + uuid,
 716                 "abc123",
 717                 http.StatusInternalServerError,
 718                 []byte("Error")})
 719         defer ksGateway.listener.Close()
 720
 721         arv, err := arvadosclient.MakeArvadosClient()
 722         kc, _ := MakeKeepClient(&arv)
 723         arv.ApiToken = "abc123"
 724         kc.SetServiceRoots(
 725                 map[string]string{"zzzzz-bi6l4-keepdisk0000000": ksLocal.url},
 726                 nil,
 727                 map[string]string{uuid: ksGateway.url})
 728
 729         r, n, uri, err := kc.Get(hash + "+K@" + uuid)
 730         c.Assert(err, Equals, nil)
 731         defer r.Close()
 732         c.Check(n, Equals, int64(3))
 733         c.Check(uri, Equals, fmt.Sprintf("%s/%s", ksLocal.url, hash+"+K@"+uuid))
 734
 735         content, err := ioutil.ReadAll(r)
 736         c.Check(err, Equals, nil)
 737         c.Check(content, DeepEquals, []byte("foo"))
 738 }
 739
 740 type BarHandler struct {
 741         handled chan string
 742 }
 743
 744 func (this BarHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
 745         resp.Write([]byte("bar"))
 746         this.handled <- fmt.Sprintf("http://%s", req.Host)
 747 }
 748
 749 func (s *StandaloneSuite) TestChecksum(c *C) {
 750         foohash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
 751         barhash := fmt.Sprintf("%x", md5.Sum([]byte("bar")))
 752
 753         st := BarHandler{make(chan string, 1)}
 754
 755         ks := RunFakeKeepServer(st)
 756         defer ks.listener.Close()
 757
 758         arv, err := arvadosclient.MakeArvadosClient()
 759         kc, _ := MakeKeepClient(&arv)
 760         arv.ApiToken = "abc123"
 761         kc.SetServiceRoots(map[string]string{"x": ks.url}, nil, nil)
 762
 763         r, n, _, err := kc.Get(barhash)
 764         _, err = ioutil.ReadAll(r)
 765         c.Check(n, Equals, int64(3))
 766         c.Check(err, Equals, nil)
 767
 768         <-st.handled
 769
 770         r, n, _, err = kc.Get(foohash)
 771         _, err = ioutil.ReadAll(r)
 772         c.Check(n, Equals, int64(3))
 773         c.Check(err, Equals, BadChecksum)
 774
 775         <-st.handled
 776 }
 777
 778 func (s *StandaloneSuite) TestGetWithFailures(c *C) {
 779         content := []byte("waz")
 780         hash := fmt.Sprintf("%x", md5.Sum(content))
 781
 782         fh := Error404Handler{
 783                 make(chan string, 4)}
 784
 785         st := StubGetHandler{
 786                 c,
 787                 hash,
 788                 "abc123",
 789                 http.StatusOK,
 790                 content}
 791
 792         arv, err := arvadosclient.MakeArvadosClient()
 793         kc, _ := MakeKeepClient(&arv)
 794         arv.ApiToken = "abc123"
 795         localRoots := make(map[string]string)
 796         writableLocalRoots := make(map[string]string)
 797
 798         ks1 := RunSomeFakeKeepServers(st, 1)
 799         ks2 := RunSomeFakeKeepServers(fh, 4)
 800
 801         for i, k := range ks1 {
 802                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 803                 writableLocalRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 804                 defer k.listener.Close()
 805         }
 806         for i, k := range ks2 {
 807                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i+len(ks1))] = k.url
 808                 writableLocalRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i+len(ks1))] = k.url
 809                 defer k.listener.Close()
 810         }
 811
 812         kc.SetServiceRoots(localRoots, writableLocalRoots, nil)
 813         kc.Retries = 0
 814
 815         // This test works only if one of the failing services is
 816         // attempted before the succeeding service. Otherwise,
 817         // <-fh.handled below will just hang! (Probe order depends on
 818         // the choice of block content "waz" and the UUIDs of the fake
 819         // servers, so we just tried different strings until we found
 820         // an example that passes this Assert.)
 821         c.Assert(NewRootSorter(localRoots, hash).GetSortedRoots()[0], Not(Equals), ks1[0].url)
 822
 823         r, n, url2, err := kc.Get(hash)
 824
 825         <-fh.handled
 826         c.Check(err, Equals, nil)
 827         c.Check(n, Equals, int64(3))
 828         c.Check(url2, Equals, fmt.Sprintf("%s/%s", ks1[0].url, hash))
 829
 830         read_content, err2 := ioutil.ReadAll(r)
 831         c.Check(err2, Equals, nil)
 832         c.Check(read_content, DeepEquals, content)
 833 }
 834
 835 func (s *ServerRequiredSuite) TestPutGetHead(c *C) {
 836         content := []byte("TestPutGetHead")
 837
 838         arv, err := arvadosclient.MakeArvadosClient()
 839         kc, err := MakeKeepClient(&arv)
 840         c.Assert(err, Equals, nil)
 841
 842         hash := fmt.Sprintf("%x", md5.Sum(content))
 843
 844         {
 845                 n, _, err := kc.Ask(hash)
 846                 c.Check(err, Equals, BlockNotFound)
 847                 c.Check(n, Equals, int64(0))
 848         }
 849         {
 850                 hash2, replicas, err := kc.PutB(content)
 851                 c.Check(hash2, Matches, fmt.Sprintf(`%s\+%d\b.*`, hash, len(content)))
 852                 c.Check(replicas, Equals, 2)
 853                 c.Check(err, Equals, nil)
 854         }
 855         {
 856                 r, n, url2, err := kc.Get(hash)
 857                 c.Check(err, Equals, nil)
 858                 c.Check(n, Equals, int64(len(content)))
 859                 c.Check(url2, Matches, fmt.Sprintf("http://localhost:\\d+/%s", hash))
 860
 861                 read_content, err2 := ioutil.ReadAll(r)
 862                 c.Check(err2, Equals, nil)
 863                 c.Check(read_content, DeepEquals, content)
 864         }
 865         {
 866                 n, url2, err := kc.Ask(hash)
 867                 c.Check(err, Equals, nil)
 868                 c.Check(n, Equals, int64(len(content)))
 869                 c.Check(url2, Matches, fmt.Sprintf("http://localhost:\\d+/%s", hash))
 870         }
 871 }
 872
 873 type StubProxyHandler struct {
 874         handled chan string
 875 }
 876
 877 func (this StubProxyHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
 878         resp.Header().Set("X-Keep-Replicas-Stored", "2")
 879         this.handled <- fmt.Sprintf("http://%s", req.Host)
 880 }
 881
 882 func (s *StandaloneSuite) TestPutProxy(c *C) {
 883         log.Printf("TestPutProxy")
 884
 885         st := StubProxyHandler{make(chan string, 1)}
 886
 887         arv, err := arvadosclient.MakeArvadosClient()
 888         kc, _ := MakeKeepClient(&arv)
 889
 890         kc.Want_replicas = 2
 891         kc.Using_proxy = true
 892         arv.ApiToken = "abc123"
 893         localRoots := make(map[string]string)
 894         writableLocalRoots := make(map[string]string)
 895
 896         ks1 := RunSomeFakeKeepServers(st, 1)
 897
 898         for i, k := range ks1 {
 899                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 900                 writableLocalRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 901                 defer k.listener.Close()
 902         }
 903
 904         kc.SetServiceRoots(localRoots, writableLocalRoots, nil)
 905
 906         _, replicas, err := kc.PutB([]byte("foo"))
 907         <-st.handled
 908
 909         c.Check(err, Equals, nil)
 910         c.Check(replicas, Equals, 2)
 911
 912         log.Printf("TestPutProxy done")
 913 }
 914
 915 func (s *StandaloneSuite) TestPutProxyInsufficientReplicas(c *C) {
 916         log.Printf("TestPutProxy")
 917
 918         st := StubProxyHandler{make(chan string, 1)}
 919
 920         arv, err := arvadosclient.MakeArvadosClient()
 921         kc, _ := MakeKeepClient(&arv)
 922
 923         kc.Want_replicas = 3
 924         kc.Using_proxy = true
 925         arv.ApiToken = "abc123"
 926         localRoots := make(map[string]string)
 927         writableLocalRoots := make(map[string]string)
 928
 929         ks1 := RunSomeFakeKeepServers(st, 1)
 930
 931         for i, k := range ks1 {
 932                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 933                 writableLocalRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
 934                 defer k.listener.Close()
 935         }
 936         kc.SetServiceRoots(localRoots, writableLocalRoots, nil)
 937
 938         _, replicas, err := kc.PutB([]byte("foo"))
 939         <-st.handled
 940
 941         c.Check(err, Equals, InsufficientReplicasError)
 942         c.Check(replicas, Equals, 2)
 943
 944         log.Printf("TestPutProxy done")
 945 }
 946
 947 func (s *StandaloneSuite) TestMakeLocator(c *C) {
 948         l, err := MakeLocator("91f372a266fe2bf2823cb8ec7fda31ce+3+Aabcde@12345678")
 949         c.Check(err, Equals, nil)
 950         c.Check(l.Hash, Equals, "91f372a266fe2bf2823cb8ec7fda31ce")
 951         c.Check(l.Size, Equals, 3)
 952         c.Check(l.Hints, DeepEquals, []string{"3", "Aabcde@12345678"})
 953 }
 954
 955 func (s *StandaloneSuite) TestMakeLocatorNoHints(c *C) {
 956         l, err := MakeLocator("91f372a266fe2bf2823cb8ec7fda31ce")
 957         c.Check(err, Equals, nil)
 958         c.Check(l.Hash, Equals, "91f372a266fe2bf2823cb8ec7fda31ce")
 959         c.Check(l.Size, Equals, -1)
 960         c.Check(l.Hints, DeepEquals, []string{})
 961 }
 962
 963 func (s *StandaloneSuite) TestMakeLocatorNoSizeHint(c *C) {
 964         l, err := MakeLocator("91f372a266fe2bf2823cb8ec7fda31ce+Aabcde@12345678")
 965         c.Check(err, Equals, nil)
 966         c.Check(l.Hash, Equals, "91f372a266fe2bf2823cb8ec7fda31ce")
 967         c.Check(l.Size, Equals, -1)
 968         c.Check(l.Hints, DeepEquals, []string{"Aabcde@12345678"})
 969 }
 970
 971 func (s *StandaloneSuite) TestMakeLocatorPreservesUnrecognizedHints(c *C) {
 972         str := "91f372a266fe2bf2823cb8ec7fda31ce+3+Unknown+Kzzzzz+Afoobar"
 973         l, err := MakeLocator(str)
 974         c.Check(err, Equals, nil)
 975         c.Check(l.Hash, Equals, "91f372a266fe2bf2823cb8ec7fda31ce")
 976         c.Check(l.Size, Equals, 3)
 977         c.Check(l.Hints, DeepEquals, []string{"3", "Unknown", "Kzzzzz", "Afoobar"})
 978         c.Check(l.String(), Equals, str)
 979 }
 980
 981 func (s *StandaloneSuite) TestMakeLocatorInvalidInput(c *C) {
 982         _, err := MakeLocator("91f372a266fe2bf2823cb8ec7fda31c")
 983         c.Check(err, Equals, InvalidLocatorError)
 984 }
 985
 986 func (s *StandaloneSuite) TestPutBWant2ReplicasWithOnlyOneWritableLocalRoot(c *C) {
 987         hash := Md5String("foo")
 988
 989         st := StubPutHandler{
 990                 c,
 991                 hash,
 992                 "abc123",
 993                 "foo",
 994                 make(chan string, 5)}
 995
 996         arv, _ := arvadosclient.MakeArvadosClient()
 997         kc, _ := MakeKeepClient(&arv)
 998
 999         kc.Want_replicas = 2
1000         arv.ApiToken = "abc123"
1001         localRoots := make(map[string]string)
1002         writableLocalRoots := make(map[string]string)
1003
1004         ks := RunSomeFakeKeepServers(st, 5)
1005
1006         for i, k := range ks {
1007                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
1008                 if i == 0 {
1009                         writableLocalRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
1010                 }
1011                 defer k.listener.Close()
1012         }
1013
1014         kc.SetServiceRoots(localRoots, writableLocalRoots, nil)
1015
1016         _, replicas, err := kc.PutB([]byte("foo"))
1017
1018         c.Check(err, Equals, InsufficientReplicasError)
1019         c.Check(replicas, Equals, 1)
1020
1021         c.Check(<-st.handled, Equals, localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", 0)])
1022 }
1023
1024 func (s *StandaloneSuite) TestPutBWithNoWritableLocalRoots(c *C) {
1025         hash := Md5String("foo")
1026
1027         st := StubPutHandler{
1028                 c,
1029                 hash,
1030                 "abc123",
1031                 "foo",
1032                 make(chan string, 5)}
1033
1034         arv, _ := arvadosclient.MakeArvadosClient()
1035         kc, _ := MakeKeepClient(&arv)
1036
1037         kc.Want_replicas = 2
1038         arv.ApiToken = "abc123"
1039         localRoots := make(map[string]string)
1040         writableLocalRoots := make(map[string]string)
1041
1042         ks := RunSomeFakeKeepServers(st, 5)
1043
1044         for i, k := range ks {
1045                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
1046                 defer k.listener.Close()
1047         }
1048
1049         kc.SetServiceRoots(localRoots, writableLocalRoots, nil)
1050
1051         _, replicas, err := kc.PutB([]byte("foo"))
1052
1053         c.Check(err, Equals, InsufficientReplicasError)
1054         c.Check(replicas, Equals, 0)
1055 }
1056
1057 type StubGetIndexHandler struct {
1058         c              *C
1059         expectPath     string
1060         expectAPIToken string
1061         httpStatus     int
1062         body           []byte
1063 }
1064
1065 func (h StubGetIndexHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
1066         h.c.Check(req.URL.Path, Equals, h.expectPath)
1067         h.c.Check(req.Header.Get("Authorization"), Equals, fmt.Sprintf("OAuth2 %s", h.expectAPIToken))
1068         resp.WriteHeader(h.httpStatus)
1069         resp.Header().Set("Content-Length", fmt.Sprintf("%d", len(h.body)))
1070         resp.Write(h.body)
1071 }
1072
1073 func (s *StandaloneSuite) TestGetIndexWithNoPrefix(c *C) {
1074         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
1075
1076         st := StubGetIndexHandler{
1077                 c,
1078                 "/index",
1079                 "abc123",
1080                 http.StatusOK,
1081                 []byte(hash + "+3 1443559274\n\n")}
1082
1083         ks := RunFakeKeepServer(st)
1084         defer ks.listener.Close()
1085
1086         arv, err := arvadosclient.MakeArvadosClient()
1087         kc, _ := MakeKeepClient(&arv)
1088         arv.ApiToken = "abc123"
1089         kc.SetServiceRoots(map[string]string{"x": ks.url}, nil, nil)
1090
1091         r, err := kc.GetIndex("x", "")
1092         c.Check(err, Equals, nil)
1093
1094         content, err2 := ioutil.ReadAll(r)
1095         c.Check(err2, Equals, nil)
1096         c.Check(content, DeepEquals, st.body[0:len(st.body)-1])
1097 }
1098
1099 func (s *StandaloneSuite) TestGetIndexWithPrefix(c *C) {
1100         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
1101
1102         st := StubGetIndexHandler{
1103                 c,
1104                 "/index/" + hash[0:3],
1105                 "abc123",
1106                 http.StatusOK,
1107                 []byte(hash + "+3 1443559274\n\n")}
1108
1109         ks := RunFakeKeepServer(st)
1110         defer ks.listener.Close()
1111
1112         arv, err := arvadosclient.MakeArvadosClient()
1113         kc, _ := MakeKeepClient(&arv)
1114         arv.ApiToken = "abc123"
1115         kc.SetServiceRoots(map[string]string{"x": ks.url}, nil, nil)
1116
1117         r, err := kc.GetIndex("x", hash[0:3])
1118         c.Check(err, Equals, nil)
1119
1120         content, err2 := ioutil.ReadAll(r)
1121         c.Check(err2, Equals, nil)
1122         c.Check(content, DeepEquals, st.body[0:len(st.body)-1])
1123 }
1124
1125 func (s *StandaloneSuite) TestGetIndexIncomplete(c *C) {
1126         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
1127
1128         st := StubGetIndexHandler{
1129                 c,
1130                 "/index/" + hash[0:3],
1131                 "abc123",
1132                 http.StatusOK,
1133                 []byte(hash)}
1134
1135         ks := RunFakeKeepServer(st)
1136         defer ks.listener.Close()
1137
1138         arv, err := arvadosclient.MakeArvadosClient()
1139         kc, _ := MakeKeepClient(&arv)
1140         arv.ApiToken = "abc123"
1141         kc.SetServiceRoots(map[string]string{"x": ks.url}, nil, nil)
1142
1143         _, err = kc.GetIndex("x", hash[0:3])
1144         c.Check(err, Equals, ErrIncompleteIndex)
1145 }
1146
1147 func (s *StandaloneSuite) TestGetIndexWithNoSuchServer(c *C) {
1148         hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
1149
1150         st := StubGetIndexHandler{
1151                 c,
1152                 "/index/" + hash[0:3],
1153                 "abc123",
1154                 http.StatusOK,
1155                 []byte(hash)}
1156
1157         ks := RunFakeKeepServer(st)
1158         defer ks.listener.Close()
1159
1160         arv, err := arvadosclient.MakeArvadosClient()
1161         kc, _ := MakeKeepClient(&arv)
1162         arv.ApiToken = "abc123"
1163         kc.SetServiceRoots(map[string]string{"x": ks.url}, nil, nil)
1164
1165         _, err = kc.GetIndex("y", hash[0:3])
1166         c.Check(err, Equals, ErrNoSuchKeepServer)
1167 }
1168
1169 func (s *StandaloneSuite) TestGetIndexWithNoSuchPrefix(c *C) {
1170         st := StubGetIndexHandler{
1171                 c,
1172                 "/index/abcd",
1173                 "abc123",
1174                 http.StatusOK,
1175                 []byte("\n")}
1176
1177         ks := RunFakeKeepServer(st)
1178         defer ks.listener.Close()
1179
1180         arv, err := arvadosclient.MakeArvadosClient()
1181         kc, _ := MakeKeepClient(&arv)
1182         arv.ApiToken = "abc123"
1183         kc.SetServiceRoots(map[string]string{"x": ks.url}, nil, nil)
1184
1185         r, err := kc.GetIndex("x", "abcd")
1186         c.Check(err, Equals, nil)
1187
1188         content, err2 := ioutil.ReadAll(r)
1189         c.Check(err2, Equals, nil)
1190         c.Check(content, DeepEquals, st.body[0:len(st.body)-1])
1191 }
1192
1193 type FailThenSucceedPutHandler struct {
1194         handled        chan string
1195         count          int
1196         successhandler StubPutHandler
1197 }
1198
1199 func (h *FailThenSucceedPutHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
1200         if h.count == 0 {
1201                 resp.WriteHeader(500)
1202                 h.count += 1
1203                 h.handled <- fmt.Sprintf("http://%s", req.Host)
1204         } else {
1205                 h.successhandler.ServeHTTP(resp, req)
1206         }
1207 }
1208
1209 func (s *StandaloneSuite) TestPutBRetry(c *C) {
1210         st := &FailThenSucceedPutHandler{make(chan string, 1), 0,
1211                 StubPutHandler{
1212                         c,
1213                         Md5String("foo"),
1214                         "abc123",
1215                         "foo",
1216                         make(chan string, 5)}}
1217
1218         arv, _ := arvadosclient.MakeArvadosClient()
1219         kc, _ := MakeKeepClient(&arv)
1220
1221         kc.Want_replicas = 2
1222         arv.ApiToken = "abc123"
1223         localRoots := make(map[string]string)
1224         writableLocalRoots := make(map[string]string)
1225
1226         ks := RunSomeFakeKeepServers(st, 2)
1227
1228         for i, k := range ks {
1229                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
1230                 writableLocalRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
1231                 defer k.listener.Close()
1232         }
1233
1234         kc.SetServiceRoots(localRoots, writableLocalRoots, nil)
1235
1236         hash, replicas, err := kc.PutB([]byte("foo"))
1237
1238         c.Check(err, Equals, nil)
1239         c.Check(hash, Equals, "")
1240         c.Check(replicas, Equals, 2)
1241 }