services/keepstore/handler_test.go

   1 // Tests for Keep HTTP handlers:
   2 //
   3 //     GetBlockHandler
   4 //     PutBlockHandler
   5 //     IndexHandler
   6 //
   7 // The HTTP handlers are responsible for enforcing permission policy,
   8 // so these tests must exercise all possible permission permutations.
   9
  10 package main
  11
  12 import (
  13         "bytes"
  14         "encoding/json"
  15         "fmt"
  16         "net/http"
  17         "net/http/httptest"
  18         "os"
  19         "regexp"
  20         "strings"
  21         "testing"
  22         "time"
  23 )
  24
  25 // A RequestTester represents the parameters for an HTTP request to
  26 // be issued on behalf of a unit test.
  27 type RequestTester struct {
  28         uri         string
  29         apiToken    string
  30         method      string
  31         requestBody []byte
  32 }
  33
  34 // Test GetBlockHandler on the following situations:
  35 //   - permissions off, unauthenticated request, unsigned locator
  36 //   - permissions on, authenticated request, signed locator
  37 //   - permissions on, authenticated request, unsigned locator
  38 //   - permissions on, unauthenticated request, signed locator
  39 //   - permissions on, authenticated request, expired locator
  40 //
  41 func TestGetHandler(t *testing.T) {
  42         defer teardown()
  43
  44         // Prepare two test Keep volumes. Our block is stored on the second volume.
  45         KeepVM = MakeTestVolumeManager(2)
  46         defer KeepVM.Close()
  47
  48         vols := KeepVM.AllWritable()
  49         if err := vols[0].Put(TestHash, TestBlock); err != nil {
  50                 t.Error(err)
  51         }
  52
  53         // Create locators for testing.
  54         // Turn on permission settings so we can generate signed locators.
  55         enforcePermissions = true
  56         PermissionSecret = []byte(knownKey)
  57         blobSignatureTTL = 300 * time.Second
  58
  59         var (
  60                 unsignedLocator  = "/" + TestHash
  61                 validTimestamp   = time.Now().Add(blobSignatureTTL)
  62                 expiredTimestamp = time.Now().Add(-time.Hour)
  63                 signedLocator    = "/" + SignLocator(TestHash, knownToken, validTimestamp)
  64                 expiredLocator   = "/" + SignLocator(TestHash, knownToken, expiredTimestamp)
  65         )
  66
  67         // -----------------
  68         // Test unauthenticated request with permissions off.
  69         enforcePermissions = false
  70
  71         // Unauthenticated request, unsigned locator
  72         // => OK
  73         response := IssueRequest(
  74                 &RequestTester{
  75                         method: "GET",
  76                         uri:    unsignedLocator,
  77                 })
  78         ExpectStatusCode(t,
  79                 "Unauthenticated request, unsigned locator", http.StatusOK, response)
  80         ExpectBody(t,
  81                 "Unauthenticated request, unsigned locator",
  82                 string(TestBlock),
  83                 response)
  84
  85         receivedLen := response.Header().Get("Content-Length")
  86         expectedLen := fmt.Sprintf("%d", len(TestBlock))
  87         if receivedLen != expectedLen {
  88                 t.Errorf("expected Content-Length %s, got %s", expectedLen, receivedLen)
  89         }
  90
  91         // ----------------
  92         // Permissions: on.
  93         enforcePermissions = true
  94
  95         // Authenticated request, signed locator
  96         // => OK
  97         response = IssueRequest(&RequestTester{
  98                 method:   "GET",
  99                 uri:      signedLocator,
 100                 apiToken: knownToken,
 101         })
 102         ExpectStatusCode(t,
 103                 "Authenticated request, signed locator", http.StatusOK, response)
 104         ExpectBody(t,
 105                 "Authenticated request, signed locator", string(TestBlock), response)
 106
 107         receivedLen = response.Header().Get("Content-Length")
 108         expectedLen = fmt.Sprintf("%d", len(TestBlock))
 109         if receivedLen != expectedLen {
 110                 t.Errorf("expected Content-Length %s, got %s", expectedLen, receivedLen)
 111         }
 112
 113         // Authenticated request, unsigned locator
 114         // => PermissionError
 115         response = IssueRequest(&RequestTester{
 116                 method:   "GET",
 117                 uri:      unsignedLocator,
 118                 apiToken: knownToken,
 119         })
 120         ExpectStatusCode(t, "unsigned locator", PermissionError.HTTPCode, response)
 121
 122         // Unauthenticated request, signed locator
 123         // => PermissionError
 124         response = IssueRequest(&RequestTester{
 125                 method: "GET",
 126                 uri:    signedLocator,
 127         })
 128         ExpectStatusCode(t,
 129                 "Unauthenticated request, signed locator",
 130                 PermissionError.HTTPCode, response)
 131
 132         // Authenticated request, expired locator
 133         // => ExpiredError
 134         response = IssueRequest(&RequestTester{
 135                 method:   "GET",
 136                 uri:      expiredLocator,
 137                 apiToken: knownToken,
 138         })
 139         ExpectStatusCode(t,
 140                 "Authenticated request, expired locator",
 141                 ExpiredError.HTTPCode, response)
 142 }
 143
 144 // Test PutBlockHandler on the following situations:
 145 //   - no server key
 146 //   - with server key, authenticated request, unsigned locator
 147 //   - with server key, unauthenticated request, unsigned locator
 148 //
 149 func TestPutHandler(t *testing.T) {
 150         defer teardown()
 151
 152         // Prepare two test Keep volumes.
 153         KeepVM = MakeTestVolumeManager(2)
 154         defer KeepVM.Close()
 155
 156         // --------------
 157         // No server key.
 158
 159         // Unauthenticated request, no server key
 160         // => OK (unsigned response)
 161         unsignedLocator := "/" + TestHash
 162         response := IssueRequest(
 163                 &RequestTester{
 164                         method:      "PUT",
 165                         uri:         unsignedLocator,
 166                         requestBody: TestBlock,
 167                 })
 168
 169         ExpectStatusCode(t,
 170                 "Unauthenticated request, no server key", http.StatusOK, response)
 171         ExpectBody(t,
 172                 "Unauthenticated request, no server key",
 173                 TestHashPutResp, response)
 174
 175         // ------------------
 176         // With a server key.
 177
 178         PermissionSecret = []byte(knownKey)
 179         blobSignatureTTL = 300 * time.Second
 180
 181         // When a permission key is available, the locator returned
 182         // from an authenticated PUT request will be signed.
 183
 184         // Authenticated PUT, signed locator
 185         // => OK (signed response)
 186         response = IssueRequest(
 187                 &RequestTester{
 188                         method:      "PUT",
 189                         uri:         unsignedLocator,
 190                         requestBody: TestBlock,
 191                         apiToken:    knownToken,
 192                 })
 193
 194         ExpectStatusCode(t,
 195                 "Authenticated PUT, signed locator, with server key",
 196                 http.StatusOK, response)
 197         responseLocator := strings.TrimSpace(response.Body.String())
 198         if VerifySignature(responseLocator, knownToken) != nil {
 199                 t.Errorf("Authenticated PUT, signed locator, with server key:\n"+
 200                         "response '%s' does not contain a valid signature",
 201                         responseLocator)
 202         }
 203
 204         // Unauthenticated PUT, unsigned locator
 205         // => OK
 206         response = IssueRequest(
 207                 &RequestTester{
 208                         method:      "PUT",
 209                         uri:         unsignedLocator,
 210                         requestBody: TestBlock,
 211                 })
 212
 213         ExpectStatusCode(t,
 214                 "Unauthenticated PUT, unsigned locator, with server key",
 215                 http.StatusOK, response)
 216         ExpectBody(t,
 217                 "Unauthenticated PUT, unsigned locator, with server key",
 218                 TestHashPutResp, response)
 219 }
 220
 221 func TestPutAndDeleteSkipReadonlyVolumes(t *testing.T) {
 222         defer teardown()
 223         dataManagerToken = "fake-data-manager-token"
 224         vols := []*MockVolume{CreateMockVolume(), CreateMockVolume()}
 225         vols[0].Readonly = true
 226         KeepVM = MakeRRVolumeManager([]Volume{vols[0], vols[1]})
 227         defer KeepVM.Close()
 228         IssueRequest(
 229                 &RequestTester{
 230                         method:      "PUT",
 231                         uri:         "/" + TestHash,
 232                         requestBody: TestBlock,
 233                 })
 234         defer func(orig bool) {
 235                 neverDelete = orig
 236         }(neverDelete)
 237         neverDelete = false
 238         IssueRequest(
 239                 &RequestTester{
 240                         method:      "DELETE",
 241                         uri:         "/" + TestHash,
 242                         requestBody: TestBlock,
 243                         apiToken:    dataManagerToken,
 244                 })
 245         type expect struct {
 246                 volnum    int
 247                 method    string
 248                 callcount int
 249         }
 250         for _, e := range []expect{
 251                 {0, "Get", 0},
 252                 {0, "Compare", 0},
 253                 {0, "Touch", 0},
 254                 {0, "Put", 0},
 255                 {0, "Delete", 0},
 256                 {1, "Get", 0},
 257                 {1, "Compare", 1},
 258                 {1, "Touch", 1},
 259                 {1, "Put", 1},
 260                 {1, "Delete", 1},
 261         } {
 262                 if calls := vols[e.volnum].CallCount(e.method); calls != e.callcount {
 263                         t.Errorf("Got %d %s() on vol %d, expect %d", calls, e.method, e.volnum, e.callcount)
 264                 }
 265         }
 266 }
 267
 268 // Test /index requests:
 269 //   - unauthenticated /index request
 270 //   - unauthenticated /index/prefix request
 271 //   - authenticated   /index request        | non-superuser
 272 //   - authenticated   /index/prefix request | non-superuser
 273 //   - authenticated   /index request        | superuser
 274 //   - authenticated   /index/prefix request | superuser
 275 //
 276 // The only /index requests that should succeed are those issued by the
 277 // superuser. They should pass regardless of the value of enforcePermissions.
 278 //
 279 func TestIndexHandler(t *testing.T) {
 280         defer teardown()
 281
 282         // Set up Keep volumes and populate them.
 283         // Include multiple blocks on different volumes, and
 284         // some metadata files (which should be omitted from index listings)
 285         KeepVM = MakeTestVolumeManager(2)
 286         defer KeepVM.Close()
 287
 288         vols := KeepVM.AllWritable()
 289         vols[0].Put(TestHash, TestBlock)
 290         vols[1].Put(TestHash2, TestBlock2)
 291         vols[0].Put(TestHash+".meta", []byte("metadata"))
 292         vols[1].Put(TestHash2+".meta", []byte("metadata"))
 293
 294         dataManagerToken = "DATA MANAGER TOKEN"
 295
 296         unauthenticatedReq := &RequestTester{
 297                 method: "GET",
 298                 uri:    "/index",
 299         }
 300         authenticatedReq := &RequestTester{
 301                 method:   "GET",
 302                 uri:      "/index",
 303                 apiToken: knownToken,
 304         }
 305         superuserReq := &RequestTester{
 306                 method:   "GET",
 307                 uri:      "/index",
 308                 apiToken: dataManagerToken,
 309         }
 310         unauthPrefixReq := &RequestTester{
 311                 method: "GET",
 312                 uri:    "/index/" + TestHash[0:3],
 313         }
 314         authPrefixReq := &RequestTester{
 315                 method:   "GET",
 316                 uri:      "/index/" + TestHash[0:3],
 317                 apiToken: knownToken,
 318         }
 319         superuserPrefixReq := &RequestTester{
 320                 method:   "GET",
 321                 uri:      "/index/" + TestHash[0:3],
 322                 apiToken: dataManagerToken,
 323         }
 324         superuserNoSuchPrefixReq := &RequestTester{
 325                 method:   "GET",
 326                 uri:      "/index/abcd",
 327                 apiToken: dataManagerToken,
 328         }
 329         superuserInvalidPrefixReq := &RequestTester{
 330                 method:   "GET",
 331                 uri:      "/index/xyz",
 332                 apiToken: dataManagerToken,
 333         }
 334
 335         // -------------------------------------------------------------
 336         // Only the superuser should be allowed to issue /index requests.
 337
 338         // ---------------------------
 339         // enforcePermissions enabled
 340         // This setting should not affect tests passing.
 341         enforcePermissions = true
 342
 343         // unauthenticated /index request
 344         // => UnauthorizedError
 345         response := IssueRequest(unauthenticatedReq)
 346         ExpectStatusCode(t,
 347                 "enforcePermissions on, unauthenticated request",
 348                 UnauthorizedError.HTTPCode,
 349                 response)
 350
 351         // unauthenticated /index/prefix request
 352         // => UnauthorizedError
 353         response = IssueRequest(unauthPrefixReq)
 354         ExpectStatusCode(t,
 355                 "permissions on, unauthenticated /index/prefix request",
 356                 UnauthorizedError.HTTPCode,
 357                 response)
 358
 359         // authenticated /index request, non-superuser
 360         // => UnauthorizedError
 361         response = IssueRequest(authenticatedReq)
 362         ExpectStatusCode(t,
 363                 "permissions on, authenticated request, non-superuser",
 364                 UnauthorizedError.HTTPCode,
 365                 response)
 366
 367         // authenticated /index/prefix request, non-superuser
 368         // => UnauthorizedError
 369         response = IssueRequest(authPrefixReq)
 370         ExpectStatusCode(t,
 371                 "permissions on, authenticated /index/prefix request, non-superuser",
 372                 UnauthorizedError.HTTPCode,
 373                 response)
 374
 375         // superuser /index request
 376         // => OK
 377         response = IssueRequest(superuserReq)
 378         ExpectStatusCode(t,
 379                 "permissions on, superuser request",
 380                 http.StatusOK,
 381                 response)
 382
 383         // ----------------------------
 384         // enforcePermissions disabled
 385         // Valid Request should still pass.
 386         enforcePermissions = false
 387
 388         // superuser /index request
 389         // => OK
 390         response = IssueRequest(superuserReq)
 391         ExpectStatusCode(t,
 392                 "permissions on, superuser request",
 393                 http.StatusOK,
 394                 response)
 395
 396         expected := `^` + TestHash + `\+\d+ \d+\n` +
 397                 TestHash2 + `\+\d+ \d+\n\n$`
 398         match, _ := regexp.MatchString(expected, response.Body.String())
 399         if !match {
 400                 t.Errorf(
 401                         "permissions on, superuser request: expected %s, got:\n%s",
 402                         expected, response.Body.String())
 403         }
 404
 405         // superuser /index/prefix request
 406         // => OK
 407         response = IssueRequest(superuserPrefixReq)
 408         ExpectStatusCode(t,
 409                 "permissions on, superuser request",
 410                 http.StatusOK,
 411                 response)
 412
 413         expected = `^` + TestHash + `\+\d+ \d+\n\n$`
 414         match, _ = regexp.MatchString(expected, response.Body.String())
 415         if !match {
 416                 t.Errorf(
 417                         "permissions on, superuser /index/prefix request: expected %s, got:\n%s",
 418                         expected, response.Body.String())
 419         }
 420
 421         // superuser /index/{no-such-prefix} request
 422         // => OK
 423         response = IssueRequest(superuserNoSuchPrefixReq)
 424         ExpectStatusCode(t,
 425                 "permissions on, superuser request",
 426                 http.StatusOK,
 427                 response)
 428
 429         if "\n" != response.Body.String() {
 430                 t.Errorf("Expected empty response for %s. Found %s", superuserNoSuchPrefixReq.uri, response.Body.String())
 431         }
 432
 433         // superuser /index/{invalid-prefix} request
 434         // => StatusBadRequest
 435         response = IssueRequest(superuserInvalidPrefixReq)
 436         ExpectStatusCode(t,
 437                 "permissions on, superuser request",
 438                 http.StatusBadRequest,
 439                 response)
 440 }
 441
 442 // TestDeleteHandler
 443 //
 444 // Cases tested:
 445 //
 446 //   With no token and with a non-data-manager token:
 447 //   * Delete existing block
 448 //     (test for 403 Forbidden, confirm block not deleted)
 449 //
 450 //   With data manager token:
 451 //
 452 //   * Delete existing block
 453 //     (test for 200 OK, response counts, confirm block deleted)
 454 //
 455 //   * Delete nonexistent block
 456 //     (test for 200 OK, response counts)
 457 //
 458 //   TODO(twp):
 459 //
 460 //   * Delete block on read-only and read-write volume
 461 //     (test for 200 OK, response with copies_deleted=1,
 462 //     copies_failed=1, confirm block deleted only on r/w volume)
 463 //
 464 //   * Delete block on read-only volume only
 465 //     (test for 200 OK, response with copies_deleted=0, copies_failed=1,
 466 //     confirm block not deleted)
 467 //
 468 func TestDeleteHandler(t *testing.T) {
 469         defer teardown()
 470
 471         // Set up Keep volumes and populate them.
 472         // Include multiple blocks on different volumes, and
 473         // some metadata files (which should be omitted from index listings)
 474         KeepVM = MakeTestVolumeManager(2)
 475         defer KeepVM.Close()
 476
 477         vols := KeepVM.AllWritable()
 478         vols[0].Put(TestHash, TestBlock)
 479
 480         // Explicitly set the blobSignatureTTL to 0 for these
 481         // tests, to ensure the MockVolume deletes the blocks
 482         // even though they have just been created.
 483         blobSignatureTTL = time.Duration(0)
 484
 485         var userToken = "NOT DATA MANAGER TOKEN"
 486         dataManagerToken = "DATA MANAGER TOKEN"
 487
 488         neverDelete = false
 489
 490         unauthReq := &RequestTester{
 491                 method: "DELETE",
 492                 uri:    "/" + TestHash,
 493         }
 494
 495         userReq := &RequestTester{
 496                 method:   "DELETE",
 497                 uri:      "/" + TestHash,
 498                 apiToken: userToken,
 499         }
 500
 501         superuserExistingBlockReq := &RequestTester{
 502                 method:   "DELETE",
 503                 uri:      "/" + TestHash,
 504                 apiToken: dataManagerToken,
 505         }
 506
 507         superuserNonexistentBlockReq := &RequestTester{
 508                 method:   "DELETE",
 509                 uri:      "/" + TestHash2,
 510                 apiToken: dataManagerToken,
 511         }
 512
 513         // Unauthenticated request returns PermissionError.
 514         var response *httptest.ResponseRecorder
 515         response = IssueRequest(unauthReq)
 516         ExpectStatusCode(t,
 517                 "unauthenticated request",
 518                 PermissionError.HTTPCode,
 519                 response)
 520
 521         // Authenticated non-admin request returns PermissionError.
 522         response = IssueRequest(userReq)
 523         ExpectStatusCode(t,
 524                 "authenticated non-admin request",
 525                 PermissionError.HTTPCode,
 526                 response)
 527
 528         // Authenticated admin request for nonexistent block.
 529         type deletecounter struct {
 530                 Deleted int `json:"copies_deleted"`
 531                 Failed  int `json:"copies_failed"`
 532         }
 533         var responseDc, expectedDc deletecounter
 534
 535         response = IssueRequest(superuserNonexistentBlockReq)
 536         ExpectStatusCode(t,
 537                 "data manager request, nonexistent block",
 538                 http.StatusNotFound,
 539                 response)
 540
 541         // Authenticated admin request for existing block while neverDelete is set.
 542         neverDelete = true
 543         response = IssueRequest(superuserExistingBlockReq)
 544         ExpectStatusCode(t,
 545                 "authenticated request, existing block, method disabled",
 546                 MethodDisabledError.HTTPCode,
 547                 response)
 548         neverDelete = false
 549
 550         // Authenticated admin request for existing block.
 551         response = IssueRequest(superuserExistingBlockReq)
 552         ExpectStatusCode(t,
 553                 "data manager request, existing block",
 554                 http.StatusOK,
 555                 response)
 556         // Expect response {"copies_deleted":1,"copies_failed":0}
 557         expectedDc = deletecounter{1, 0}
 558         json.NewDecoder(response.Body).Decode(&responseDc)
 559         if responseDc != expectedDc {
 560                 t.Errorf("superuserExistingBlockReq\nexpected: %+v\nreceived: %+v",
 561                         expectedDc, responseDc)
 562         }
 563         // Confirm the block has been deleted
 564         _, err := vols[0].Get(TestHash)
 565         var blockDeleted = os.IsNotExist(err)
 566         if !blockDeleted {
 567                 t.Error("superuserExistingBlockReq: block not deleted")
 568         }
 569
 570         // A DELETE request on a block newer than blobSignatureTTL
 571         // should return success but leave the block on the volume.
 572         vols[0].Put(TestHash, TestBlock)
 573         blobSignatureTTL = time.Hour
 574
 575         response = IssueRequest(superuserExistingBlockReq)
 576         ExpectStatusCode(t,
 577                 "data manager request, existing block",
 578                 http.StatusOK,
 579                 response)
 580         // Expect response {"copies_deleted":1,"copies_failed":0}
 581         expectedDc = deletecounter{1, 0}
 582         json.NewDecoder(response.Body).Decode(&responseDc)
 583         if responseDc != expectedDc {
 584                 t.Errorf("superuserExistingBlockReq\nexpected: %+v\nreceived: %+v",
 585                         expectedDc, responseDc)
 586         }
 587         // Confirm the block has NOT been deleted.
 588         _, err = vols[0].Get(TestHash)
 589         if err != nil {
 590                 t.Errorf("testing delete on new block: %s\n", err)
 591         }
 592 }
 593
 594 // TestPullHandler
 595 //
 596 // Test handling of the PUT /pull statement.
 597 //
 598 // Cases tested: syntactically valid and invalid pull lists, from the
 599 // data manager and from unprivileged users:
 600 //
 601 //   1. Valid pull list from an ordinary user
 602 //      (expected result: 401 Unauthorized)
 603 //
 604 //   2. Invalid pull request from an ordinary user
 605 //      (expected result: 401 Unauthorized)
 606 //
 607 //   3. Valid pull request from the data manager
 608 //      (expected result: 200 OK with request body "Received 3 pull
 609 //      requests"
 610 //
 611 //   4. Invalid pull request from the data manager
 612 //      (expected result: 400 Bad Request)
 613 //
 614 // Test that in the end, the pull manager received a good pull list with
 615 // the expected number of requests.
 616 //
 617 // TODO(twp): test concurrency: launch 100 goroutines to update the
 618 // pull list simultaneously.  Make sure that none of them return 400
 619 // Bad Request and that pullq.GetList() returns a valid list.
 620 //
 621 func TestPullHandler(t *testing.T) {
 622         defer teardown()
 623
 624         var userToken = "USER TOKEN"
 625         dataManagerToken = "DATA MANAGER TOKEN"
 626
 627         pullq = NewWorkQueue()
 628
 629         goodJSON := []byte(`[
 630                 {
 631                         "locator":"locator_with_two_servers",
 632                         "servers":[
 633                                 "server1",
 634                                 "server2"
 635                         ]
 636                 },
 637                 {
 638                         "locator":"locator_with_no_servers",
 639                         "servers":[]
 640                 },
 641                 {
 642                         "locator":"",
 643                         "servers":["empty_locator"]
 644                 }
 645         ]`)
 646
 647         badJSON := []byte(`{ "key":"I'm a little teapot" }`)
 648
 649         type pullTest struct {
 650                 name         string
 651                 req          RequestTester
 652                 responseCode int
 653                 responseBody string
 654         }
 655         var testcases = []pullTest{
 656                 {
 657                         "Valid pull list from an ordinary user",
 658                         RequestTester{"/pull", userToken, "PUT", goodJSON},
 659                         http.StatusUnauthorized,
 660                         "Unauthorized\n",
 661                 },
 662                 {
 663                         "Invalid pull request from an ordinary user",
 664                         RequestTester{"/pull", userToken, "PUT", badJSON},
 665                         http.StatusUnauthorized,
 666                         "Unauthorized\n",
 667                 },
 668                 {
 669                         "Valid pull request from the data manager",
 670                         RequestTester{"/pull", dataManagerToken, "PUT", goodJSON},
 671                         http.StatusOK,
 672                         "Received 3 pull requests\n",
 673                 },
 674                 {
 675                         "Invalid pull request from the data manager",
 676                         RequestTester{"/pull", dataManagerToken, "PUT", badJSON},
 677                         http.StatusBadRequest,
 678                         "",
 679                 },
 680         }
 681
 682         for _, tst := range testcases {
 683                 response := IssueRequest(&tst.req)
 684                 ExpectStatusCode(t, tst.name, tst.responseCode, response)
 685                 ExpectBody(t, tst.name, tst.responseBody, response)
 686         }
 687
 688         // The Keep pull manager should have received one good list with 3
 689         // requests on it.
 690         for i := 0; i < 3; i++ {
 691                 item := <-pullq.NextItem
 692                 if _, ok := item.(PullRequest); !ok {
 693                         t.Errorf("item %v could not be parsed as a PullRequest", item)
 694                 }
 695         }
 696
 697         expectChannelEmpty(t, pullq.NextItem)
 698 }
 699
 700 // TestTrashHandler
 701 //
 702 // Test cases:
 703 //
 704 // Cases tested: syntactically valid and invalid trash lists, from the
 705 // data manager and from unprivileged users:
 706 //
 707 //   1. Valid trash list from an ordinary user
 708 //      (expected result: 401 Unauthorized)
 709 //
 710 //   2. Invalid trash list from an ordinary user
 711 //      (expected result: 401 Unauthorized)
 712 //
 713 //   3. Valid trash list from the data manager
 714 //      (expected result: 200 OK with request body "Received 3 trash
 715 //      requests"
 716 //
 717 //   4. Invalid trash list from the data manager
 718 //      (expected result: 400 Bad Request)
 719 //
 720 // Test that in the end, the trash collector received a good list
 721 // trash list with the expected number of requests.
 722 //
 723 // TODO(twp): test concurrency: launch 100 goroutines to update the
 724 // pull list simultaneously.  Make sure that none of them return 400
 725 // Bad Request and that replica.Dump() returns a valid list.
 726 //
 727 func TestTrashHandler(t *testing.T) {
 728         defer teardown()
 729
 730         var userToken = "USER TOKEN"
 731         dataManagerToken = "DATA MANAGER TOKEN"
 732
 733         trashq = NewWorkQueue()
 734
 735         goodJSON := []byte(`[
 736                 {
 737                         "locator":"block1",
 738                         "block_mtime":1409082153
 739                 },
 740                 {
 741                         "locator":"block2",
 742                         "block_mtime":1409082153
 743                 },
 744                 {
 745                         "locator":"block3",
 746                         "block_mtime":1409082153
 747                 }
 748         ]`)
 749
 750         badJSON := []byte(`I am not a valid JSON string`)
 751
 752         type trashTest struct {
 753                 name         string
 754                 req          RequestTester
 755                 responseCode int
 756                 responseBody string
 757         }
 758
 759         var testcases = []trashTest{
 760                 {
 761                         "Valid trash list from an ordinary user",
 762                         RequestTester{"/trash", userToken, "PUT", goodJSON},
 763                         http.StatusUnauthorized,
 764                         "Unauthorized\n",
 765                 },
 766                 {
 767                         "Invalid trash list from an ordinary user",
 768                         RequestTester{"/trash", userToken, "PUT", badJSON},
 769                         http.StatusUnauthorized,
 770                         "Unauthorized\n",
 771                 },
 772                 {
 773                         "Valid trash list from the data manager",
 774                         RequestTester{"/trash", dataManagerToken, "PUT", goodJSON},
 775                         http.StatusOK,
 776                         "Received 3 trash requests\n",
 777                 },
 778                 {
 779                         "Invalid trash list from the data manager",
 780                         RequestTester{"/trash", dataManagerToken, "PUT", badJSON},
 781                         http.StatusBadRequest,
 782                         "",
 783                 },
 784         }
 785
 786         for _, tst := range testcases {
 787                 response := IssueRequest(&tst.req)
 788                 ExpectStatusCode(t, tst.name, tst.responseCode, response)
 789                 ExpectBody(t, tst.name, tst.responseBody, response)
 790         }
 791
 792         // The trash collector should have received one good list with 3
 793         // requests on it.
 794         for i := 0; i < 3; i++ {
 795                 item := <-trashq.NextItem
 796                 if _, ok := item.(TrashRequest); !ok {
 797                         t.Errorf("item %v could not be parsed as a TrashRequest", item)
 798                 }
 799         }
 800
 801         expectChannelEmpty(t, trashq.NextItem)
 802 }
 803
 804 // ====================
 805 // Helper functions
 806 // ====================
 807
 808 // IssueTestRequest executes an HTTP request described by rt, to a
 809 // REST router.  It returns the HTTP response to the request.
 810 func IssueRequest(rt *RequestTester) *httptest.ResponseRecorder {
 811         response := httptest.NewRecorder()
 812         body := bytes.NewReader(rt.requestBody)
 813         req, _ := http.NewRequest(rt.method, rt.uri, body)
 814         if rt.apiToken != "" {
 815                 req.Header.Set("Authorization", "OAuth2 "+rt.apiToken)
 816         }
 817         loggingRouter := MakeLoggingRESTRouter()
 818         loggingRouter.ServeHTTP(response, req)
 819         return response
 820 }
 821
 822 // ExpectStatusCode checks whether a response has the specified status code,
 823 // and reports a test failure if not.
 824 func ExpectStatusCode(
 825         t *testing.T,
 826         testname string,
 827         expectedStatus int,
 828         response *httptest.ResponseRecorder) {
 829         if response.Code != expectedStatus {
 830                 t.Errorf("%s: expected status %d, got %+v",
 831                         testname, expectedStatus, response)
 832         }
 833 }
 834
 835 func ExpectBody(
 836         t *testing.T,
 837         testname string,
 838         expectedBody string,
 839         response *httptest.ResponseRecorder) {
 840         if expectedBody != "" && response.Body.String() != expectedBody {
 841                 t.Errorf("%s: expected response body '%s', got %+v",
 842                         testname, expectedBody, response)
 843         }
 844 }
 845
 846 // See #7121
 847 func TestPutNeedsOnlyOneBuffer(t *testing.T) {
 848         defer teardown()
 849         KeepVM = MakeTestVolumeManager(1)
 850         defer KeepVM.Close()
 851
 852         defer func(orig *bufferPool) {
 853                 bufs = orig
 854         }(bufs)
 855         bufs = newBufferPool(1, BlockSize)
 856
 857         ok := make(chan struct{})
 858         go func() {
 859                 for i := 0; i < 2; i++ {
 860                         response := IssueRequest(
 861                                 &RequestTester{
 862                                         method:      "PUT",
 863                                         uri:         "/" + TestHash,
 864                                         requestBody: TestBlock,
 865                                 })
 866                         ExpectStatusCode(t,
 867                                 "TestPutNeedsOnlyOneBuffer", http.StatusOK, response)
 868                 }
 869                 ok <- struct{}{}
 870         }()
 871
 872         select {
 873         case <-ok:
 874         case <-time.After(time.Second):
 875                 t.Fatal("PUT deadlocks with maxBuffers==1")
 876         }
 877 }
 878
 879 // Invoke the PutBlockHandler a bunch of times to test for bufferpool resource
 880 // leak.
 881 func TestPutHandlerNoBufferleak(t *testing.T) {
 882         defer teardown()
 883
 884         // Prepare two test Keep volumes.
 885         KeepVM = MakeTestVolumeManager(2)
 886         defer KeepVM.Close()
 887
 888         ok := make(chan bool)
 889         go func() {
 890                 for i := 0; i < maxBuffers+1; i++ {
 891                         // Unauthenticated request, no server key
 892                         // => OK (unsigned response)
 893                         unsignedLocator := "/" + TestHash
 894                         response := IssueRequest(
 895                                 &RequestTester{
 896                                         method:      "PUT",
 897                                         uri:         unsignedLocator,
 898                                         requestBody: TestBlock,
 899                                 })
 900                         ExpectStatusCode(t,
 901                                 "TestPutHandlerBufferleak", http.StatusOK, response)
 902                         ExpectBody(t,
 903                                 "TestPutHandlerBufferleak",
 904                                 TestHashPutResp, response)
 905                 }
 906                 ok <- true
 907         }()
 908         select {
 909         case <-time.After(20 * time.Second):
 910                 // If the buffer pool leaks, the test goroutine hangs.
 911                 t.Fatal("test did not finish, assuming pool leaked")
 912         case <-ok:
 913         }
 914 }
 915
 916 // Invoke the GetBlockHandler a bunch of times to test for bufferpool resource
 917 // leak.
 918 func TestGetHandlerNoBufferleak(t *testing.T) {
 919         defer teardown()
 920
 921         // Prepare two test Keep volumes. Our block is stored on the second volume.
 922         KeepVM = MakeTestVolumeManager(2)
 923         defer KeepVM.Close()
 924
 925         vols := KeepVM.AllWritable()
 926         if err := vols[0].Put(TestHash, TestBlock); err != nil {
 927                 t.Error(err)
 928         }
 929
 930         ok := make(chan bool)
 931         go func() {
 932                 for i := 0; i < maxBuffers+1; i++ {
 933                         // Unauthenticated request, unsigned locator
 934                         // => OK
 935                         unsignedLocator := "/" + TestHash
 936                         response := IssueRequest(
 937                                 &RequestTester{
 938                                         method: "GET",
 939                                         uri:    unsignedLocator,
 940                                 })
 941                         ExpectStatusCode(t,
 942                                 "Unauthenticated request, unsigned locator", http.StatusOK, response)
 943                         ExpectBody(t,
 944                                 "Unauthenticated request, unsigned locator",
 945                                 string(TestBlock),
 946                                 response)
 947                 }
 948                 ok <- true
 949         }()
 950         select {
 951         case <-time.After(20 * time.Second):
 952                 // If the buffer pool leaks, the test goroutine hangs.
 953                 t.Fatal("test did not finish, assuming pool leaked")
 954         case <-ok:
 955         }
 956 }
 957
 958 func TestPutReplicationHeader(t *testing.T) {
 959         defer teardown()
 960
 961         KeepVM = MakeTestVolumeManager(2)
 962         defer KeepVM.Close()
 963
 964         resp := IssueRequest(&RequestTester{
 965                 method:      "PUT",
 966                 uri:         "/" + TestHash,
 967                 requestBody: TestBlock,
 968         })
 969         if r := resp.Header().Get("X-Keep-Replicas-Stored"); r != "1" {
 970                 t.Errorf("Got X-Keep-Replicas-Stored: %q, expected %q", r, "1")
 971         }
 972 }