sdk/go/keepclient/collectionreader_test.go

   1 // Copyright (C) The Arvados Authors. All rights reserved.
   2 //
   3 // SPDX-License-Identifier: Apache-2.0
   4
   5 package keepclient
   6
   7 import (
   8         "crypto/md5"
   9         "fmt"
  10         "io"
  11         "io/ioutil"
  12         "math/rand"
  13         "net/http"
  14         "os"
  15         "strconv"
  16         "strings"
  17
  18         "git.curoverse.com/arvados.git/sdk/go/arvadosclient"
  19         "git.curoverse.com/arvados.git/sdk/go/arvadostest"
  20         check "gopkg.in/check.v1"
  21 )
  22
  23 var _ = check.Suite(&CollectionReaderUnit{})
  24
  25 type CollectionReaderUnit struct {
  26         arv     *arvadosclient.ArvadosClient
  27         kc      *KeepClient
  28         handler SuccessHandler
  29 }
  30
  31 func (s *CollectionReaderUnit) SetUpTest(c *check.C) {
  32         var err error
  33         s.arv, err = arvadosclient.MakeArvadosClient()
  34         c.Assert(err, check.IsNil)
  35         s.arv.ApiToken = arvadostest.ActiveToken
  36
  37         s.kc, err = MakeKeepClient(s.arv)
  38         c.Assert(err, check.IsNil)
  39
  40         s.handler = SuccessHandler{
  41                 disk: make(map[string][]byte),
  42                 lock: make(chan struct{}, 1),
  43                 ops:  new(int),
  44         }
  45         localRoots := make(map[string]string)
  46         for i, k := range RunSomeFakeKeepServers(s.handler, 4) {
  47                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
  48         }
  49         s.kc.SetServiceRoots(localRoots, localRoots, nil)
  50 }
  51
  52 type SuccessHandler struct {
  53         disk map[string][]byte
  54         lock chan struct{} // channel with buffer==1: full when an operation is in progress.
  55         ops  *int          // number of operations completed
  56 }
  57
  58 func (h SuccessHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
  59         switch req.Method {
  60         case "PUT":
  61                 buf, err := ioutil.ReadAll(req.Body)
  62                 if err != nil {
  63                         resp.WriteHeader(500)
  64                         return
  65                 }
  66                 pdh := fmt.Sprintf("%x+%d", md5.Sum(buf), len(buf))
  67                 h.lock <- struct{}{}
  68                 h.disk[pdh] = buf
  69                 if h.ops != nil {
  70                         (*h.ops)++
  71                 }
  72                 <-h.lock
  73                 resp.Write([]byte(pdh))
  74         case "GET":
  75                 pdh := req.URL.Path[1:]
  76                 h.lock <- struct{}{}
  77                 buf, ok := h.disk[pdh]
  78                 if h.ops != nil {
  79                         (*h.ops)++
  80                 }
  81                 <-h.lock
  82                 if !ok {
  83                         resp.WriteHeader(http.StatusNotFound)
  84                 } else {
  85                         resp.Write(buf)
  86                 }
  87         default:
  88                 resp.WriteHeader(http.StatusMethodNotAllowed)
  89         }
  90 }
  91
  92 type rdrTest struct {
  93         mt   string      // manifest text
  94         f    string      // filename
  95         want interface{} // error or string to expect
  96 }
  97
  98 func (s *CollectionReaderUnit) TestCollectionReaderContent(c *check.C) {
  99         s.kc.PutB([]byte("foo"))
 100         s.kc.PutB([]byte("bar"))
 101         s.kc.PutB([]byte("Hello world\n"))
 102         s.kc.PutB([]byte(""))
 103
 104         mt := arvadostest.PathologicalManifest
 105
 106         for _, testCase := range []rdrTest{
 107                 {mt: mt, f: "zzzz", want: os.ErrNotExist},
 108                 {mt: mt, f: "frob", want: os.ErrNotExist},
 109                 {mt: mt, f: "/segmented/frob", want: "frob"},
 110                 {mt: mt, f: "./segmented/frob", want: "frob"},
 111                 {mt: mt, f: "/f", want: "f"},
 112                 {mt: mt, f: "./f", want: "f"},
 113                 {mt: mt, f: "foo bar//baz", want: "foo"},
 114                 {mt: mt, f: "foo/zero", want: ""},
 115                 {mt: mt, f: "zero@0", want: ""},
 116                 {mt: mt, f: "zero@1", want: ""},
 117                 {mt: mt, f: "zero@4", want: ""},
 118                 {mt: mt, f: "zero@9", want: ""},
 119                 {mt: mt, f: "f", want: "f"},
 120                 {mt: mt, f: "ooba", want: "ooba"},
 121                 {mt: mt, f: "overlapReverse/o", want: "o"},
 122                 {mt: mt, f: "overlapReverse/oo", want: "oo"},
 123                 {mt: mt, f: "overlapReverse/ofoo", want: "ofoo"},
 124                 {mt: mt, f: "foo bar/baz", want: "foo"},
 125                 {mt: mt, f: "segmented/frob", want: "frob"},
 126                 {mt: mt, f: "segmented/oof", want: "oof"},
 127         } {
 128                 c.Logf("%#v", testCase)
 129                 rdr, err := s.kc.CollectionFileReader(map[string]interface{}{"manifest_text": testCase.mt}, testCase.f)
 130                 switch want := testCase.want.(type) {
 131                 case error:
 132                         c.Check(rdr, check.IsNil)
 133                         c.Check(err, check.Equals, want)
 134                 case string:
 135                         buf := make([]byte, len(want))
 136                         n, err := io.ReadFull(rdr, buf)
 137                         c.Check(err, check.IsNil)
 138                         for i := 0; i < 4; i++ {
 139                                 c.Check(string(buf), check.Equals, want)
 140                                 n, err = rdr.Read(buf)
 141                                 c.Check(n, check.Equals, 0)
 142                                 c.Check(err, check.Equals, io.EOF)
 143                         }
 144
 145                         for a := len(want) - 2; a >= 0; a-- {
 146                                 for b := a + 1; b <= len(want); b++ {
 147                                         offset, err := rdr.Seek(int64(a), io.SeekStart)
 148                                         c.Logf("...a=%d, b=%d", a, b)
 149                                         c.Check(err, check.IsNil)
 150                                         c.Check(offset, check.Equals, int64(a))
 151                                         buf := make([]byte, b-a)
 152                                         n, err := io.ReadFull(rdr, buf)
 153                                         c.Check(n, check.Equals, b-a)
 154                                         c.Check(string(buf), check.Equals, want[a:b])
 155                                 }
 156                         }
 157                         offset, err := rdr.Seek(-1, io.SeekStart)
 158                         c.Check(err, check.NotNil)
 159                         c.Check(offset, check.Equals, int64(len(want)))
 160
 161                         c.Check(rdr.Close(), check.Equals, nil)
 162                 }
 163         }
 164 }
 165
 166 func (s *CollectionReaderUnit) TestCollectionReaderManyBlocks(c *check.C) {
 167         h := md5.New()
 168         var testdata []byte
 169         buf := make([]byte, 4096)
 170         locs := make([]string, len(buf))
 171         filesize := 0
 172         for i := 0; i < len(locs); i++ {
 173                 _, err := rand.Read(buf[:i])
 174                 h.Write(buf[:i])
 175                 locs[i], _, err = s.kc.PutB(buf[:i])
 176                 c.Assert(err, check.IsNil)
 177                 filesize += i
 178                 testdata = append(testdata, buf[:i]...)
 179         }
 180         manifest := "./random " + strings.Join(locs, " ") + " 0:" + strconv.Itoa(filesize) + ":bytes.bin\n"
 181         dataMD5 := h.Sum(nil)
 182
 183         checkMD5 := md5.New()
 184         rdr, err := s.kc.CollectionFileReader(map[string]interface{}{"manifest_text": manifest}, "random/bytes.bin")
 185         c.Assert(err, check.IsNil)
 186         defer rdr.Close()
 187
 188         _, err = io.Copy(checkMD5, rdr)
 189         c.Check(err, check.IsNil)
 190         _, err = rdr.Read(make([]byte, 1))
 191         c.Check(err, check.Equals, io.EOF)
 192         c.Check(checkMD5.Sum(nil), check.DeepEquals, dataMD5)
 193
 194         size, err := rdr.Seek(0, io.SeekEnd)
 195         c.Check(err, check.IsNil)
 196         buf = make([]byte, len(testdata))
 197         copy(buf, testdata)
 198         curPos := size
 199         for i := 0; i < 16; i++ {
 200                 offset := rand.Intn(len(buf) - 1)
 201                 count := rand.Intn(len(buf) - offset)
 202                 if rand.Intn(2) == 0 {
 203                         curPos, err = rdr.Seek(int64(offset)-curPos, io.SeekCurrent)
 204                 } else {
 205                         curPos, err = rdr.Seek(int64(offset), io.SeekStart)
 206                 }
 207                 c.Check(curPos, check.Equals, int64(offset))
 208                 for count > 0 {
 209                         n, err := rdr.Read(buf[offset : offset+count])
 210                         c.Assert(err, check.IsNil)
 211                         c.Assert(n > 0, check.Equals, true)
 212                         offset += n
 213                         count -= n
 214                 }
 215                 curPos, err = rdr.Seek(0, io.SeekCurrent)
 216                 c.Check(curPos, check.Equals, int64(offset))
 217         }
 218         c.Check(md5.Sum(buf), check.DeepEquals, md5.Sum(testdata))
 219         c.Check(buf[:1000], check.DeepEquals, testdata[:1000])
 220
 221         curPos, err = rdr.Seek(size+12345, io.SeekCurrent)
 222         c.Check(err, check.IsNil)
 223         c.Check(curPos, check.Equals, size)
 224
 225         curPos, err = rdr.Seek(8-size, io.SeekCurrent)
 226         c.Check(err, check.IsNil)
 227         c.Check(curPos, check.Equals, int64(8))
 228
 229         curPos, err = rdr.Seek(-9, io.SeekCurrent)
 230         c.Check(err, check.NotNil)
 231         c.Check(curPos, check.Equals, int64(8))
 232 }
 233
 234 func (s *CollectionReaderUnit) TestCollectionReaderCloseEarly(c *check.C) {
 235         s.kc.BlockCache = &BlockCache{}
 236         s.kc.PutB([]byte("foo"))
 237         s.kc.PutB([]byte("bar"))
 238         s.kc.PutB([]byte("baz"))
 239
 240         mt := ". "
 241         for i := 0; i < 300; i++ {
 242                 mt += "acbd18db4cc2f85cedef654fccc4a4d8+3 37b51d194a7513e45b56f6524f2d51f2+3 73feffa4b7f6bb68e44cf984c85f6e88+3 "
 243         }
 244         mt += "0:2700:foo900.txt\n"
 245
 246         // Grab the stub server's lock, ensuring our cfReader doesn't
 247         // get anything back from its first call to kc.Get() before we
 248         // have a chance to call Close().
 249         s.handler.lock <- struct{}{}
 250         opsBeforeRead := *s.handler.ops
 251
 252         rdr, err := s.kc.CollectionFileReader(map[string]interface{}{"manifest_text": mt}, "foo900.txt")
 253         c.Assert(err, check.IsNil)
 254
 255         firstReadDone := make(chan struct{})
 256         go func() {
 257                 n, err := rdr.Read(make([]byte, 3))
 258                 c.Check(n, check.Equals, 3)
 259                 c.Check(err, check.IsNil)
 260                 close(firstReadDone)
 261         }()
 262
 263         // Release the stub server's lock. The first GET operation will proceed.
 264         <-s.handler.lock
 265
 266         // Make sure our first read operation consumes the data
 267         // received from the first GET.
 268         <-firstReadDone
 269
 270         err = rdr.Close()
 271         c.Check(err, check.IsNil)
 272
 273         // Stub should have handled exactly one GET request.
 274         c.Check(*s.handler.ops, check.Equals, opsBeforeRead+1)
 275 }
 276
 277 func (s *CollectionReaderUnit) TestCollectionReaderDataError(c *check.C) {
 278         manifest := ". ffffffffffffffffffffffffffffffff+1 0:1:notfound.txt\n"
 279         buf := make([]byte, 1)
 280         rdr, err := s.kc.CollectionFileReader(map[string]interface{}{"manifest_text": manifest}, "notfound.txt")
 281         c.Check(err, check.IsNil)
 282         for i := 0; i < 2; i++ {
 283                 _, err = io.ReadFull(rdr, buf)
 284                 c.Check(err, check.NotNil)
 285                 c.Check(err, check.Not(check.Equals), io.EOF)
 286         }
 287         c.Check(rdr.Close(), check.IsNil)
 288 }