package main import ( "bytes" "crypto/md5" "encoding/base64" "encoding/xml" "flag" "fmt" "io/ioutil" "log" "math/rand" "net" "net/http" "net/http/httptest" "regexp" "sort" "strconv" "strings" "sync" "testing" "time" "github.com/curoverse/azure-sdk-for-go/storage" ) const ( // The same fake credentials used by Microsoft's Azure emulator emulatorAccountName = "devstoreaccount1" emulatorAccountKey = "Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==" ) var azureTestContainer string func init() { flag.StringVar( &azureTestContainer, "test.azure-storage-container-volume", "", "Name of Azure container to use for testing. Do not use a container with real data! Use -azure-storage-account-name and -azure-storage-key-file arguments to supply credentials.") } type azBlob struct { Data []byte Etag string Metadata map[string]string Mtime time.Time Uncommitted map[string][]byte } type azStubHandler struct { sync.Mutex blobs map[string]*azBlob race chan chan struct{} } func newAzStubHandler() *azStubHandler { return &azStubHandler{ blobs: make(map[string]*azBlob), } } func (h *azStubHandler) TouchWithDate(container, hash string, t time.Time) { blob, ok := h.blobs[container+"|"+hash] if !ok { return } blob.Mtime = t } func (h *azStubHandler) PutRaw(container, hash string, data []byte) { h.Lock() defer h.Unlock() h.blobs[container+"|"+hash] = &azBlob{ Data: data, Mtime: time.Now(), Uncommitted: make(map[string][]byte), } } func (h *azStubHandler) unlockAndRace() { if h.race == nil { return } h.Unlock() // Signal caller that race is starting by reading from // h.race. If we get a channel, block until that channel is // ready to receive. If we get nil (or h.race is closed) just // proceed. if c := <-h.race; c != nil { c <- struct{}{} } h.Lock() } var rangeRegexp = regexp.MustCompile(`^bytes=(\d+)-(\d+)$`) func (h *azStubHandler) ServeHTTP(rw http.ResponseWriter, r *http.Request) { h.Lock() defer h.Unlock() // defer log.Printf("azStubHandler: %+v", r) path := strings.Split(r.URL.Path, "/") container := path[1] hash := "" if len(path) > 2 { hash = path[2] } if err := r.ParseForm(); err != nil { log.Printf("azStubHandler(%+v): %s", r, err) rw.WriteHeader(http.StatusBadRequest) return } body, err := ioutil.ReadAll(r.Body) if err != nil { return } type blockListRequestBody struct { XMLName xml.Name `xml:"BlockList"` Uncommitted []string } blob, blobExists := h.blobs[container+"|"+hash] switch { case r.Method == "PUT" && r.Form.Get("comp") == "": // "Put Blob" API if _, ok := h.blobs[container+"|"+hash]; !ok { // Like the real Azure service, we offer a // race window during which other clients can // list/get the new blob before any data is // committed. h.blobs[container+"|"+hash] = &azBlob{ Mtime: time.Now(), Uncommitted: make(map[string][]byte), Etag: makeEtag(), } h.unlockAndRace() } h.blobs[container+"|"+hash] = &azBlob{ Data: body, Mtime: time.Now(), Uncommitted: make(map[string][]byte), Etag: makeEtag(), } rw.WriteHeader(http.StatusCreated) case r.Method == "PUT" && r.Form.Get("comp") == "block": // "Put Block" API if !blobExists { log.Printf("Got block for nonexistent blob: %+v", r) rw.WriteHeader(http.StatusBadRequest) return } blockID, err := base64.StdEncoding.DecodeString(r.Form.Get("blockid")) if err != nil || len(blockID) == 0 { log.Printf("Invalid blockid: %+q", r.Form.Get("blockid")) rw.WriteHeader(http.StatusBadRequest) return } blob.Uncommitted[string(blockID)] = body rw.WriteHeader(http.StatusCreated) case r.Method == "PUT" && r.Form.Get("comp") == "blocklist": // "Put Block List" API bl := &blockListRequestBody{} if err := xml.Unmarshal(body, bl); err != nil { log.Printf("xml Unmarshal: %s", err) rw.WriteHeader(http.StatusBadRequest) return } for _, encBlockID := range bl.Uncommitted { blockID, err := base64.StdEncoding.DecodeString(encBlockID) if err != nil || len(blockID) == 0 || blob.Uncommitted[string(blockID)] == nil { log.Printf("Invalid blockid: %+q", encBlockID) rw.WriteHeader(http.StatusBadRequest) return } blob.Data = blob.Uncommitted[string(blockID)] blob.Etag = makeEtag() blob.Mtime = time.Now() delete(blob.Uncommitted, string(blockID)) } rw.WriteHeader(http.StatusCreated) case r.Method == "PUT" && r.Form.Get("comp") == "metadata": // "Set Metadata Headers" API. We don't bother // stubbing "Get Metadata Headers": AzureBlobVolume // sets metadata headers only as a way to bump Etag // and Last-Modified. if !blobExists { log.Printf("Got metadata for nonexistent blob: %+v", r) rw.WriteHeader(http.StatusBadRequest) return } blob.Metadata = make(map[string]string) for k, v := range r.Header { if strings.HasPrefix(strings.ToLower(k), "x-ms-meta-") { blob.Metadata[k] = v[0] } } blob.Mtime = time.Now() blob.Etag = makeEtag() case (r.Method == "GET" || r.Method == "HEAD") && hash != "": // "Get Blob" API if !blobExists { rw.WriteHeader(http.StatusNotFound) return } data := blob.Data if rangeSpec := rangeRegexp.FindStringSubmatch(r.Header.Get("Range")); rangeSpec != nil { b0, err0 := strconv.Atoi(rangeSpec[1]) b1, err1 := strconv.Atoi(rangeSpec[2]) if err0 != nil || err1 != nil || b0 >= len(data) || b1 >= len(data) || b0 > b1 { rw.Header().Set("Content-Range", fmt.Sprintf("bytes */%d", len(data))) rw.WriteHeader(http.StatusRequestedRangeNotSatisfiable) return } rw.Header().Set("Content-Range", fmt.Sprintf("bytes %d-%d/%d", b0, b1, len(data))) rw.WriteHeader(http.StatusPartialContent) data = data[b0 : b1+1] } rw.Header().Set("Last-Modified", blob.Mtime.Format(time.RFC1123)) rw.Header().Set("Content-Length", strconv.Itoa(len(data))) if r.Method == "GET" { if _, err := rw.Write(data); err != nil { log.Printf("write %+q: %s", data, err) } } h.unlockAndRace() case r.Method == "DELETE" && hash != "": // "Delete Blob" API if !blobExists { rw.WriteHeader(http.StatusNotFound) return } delete(h.blobs, container+"|"+hash) rw.WriteHeader(http.StatusAccepted) case r.Method == "GET" && r.Form.Get("comp") == "list" && r.Form.Get("restype") == "container": // "List Blobs" API prefix := container + "|" + r.Form.Get("prefix") marker := r.Form.Get("marker") maxResults := 2 if n, err := strconv.Atoi(r.Form.Get("maxresults")); err == nil && n >= 1 && n <= 5000 { maxResults = n } resp := storage.BlobListResponse{ Marker: marker, NextMarker: "", MaxResults: int64(maxResults), } var hashes sort.StringSlice for k := range h.blobs { if strings.HasPrefix(k, prefix) { hashes = append(hashes, k[len(container)+1:]) } } hashes.Sort() for _, hash := range hashes { if len(resp.Blobs) == maxResults { resp.NextMarker = hash break } if len(resp.Blobs) > 0 || marker == "" || marker == hash { blob := h.blobs[container+"|"+hash] resp.Blobs = append(resp.Blobs, storage.Blob{ Name: hash, Properties: storage.BlobProperties{ LastModified: blob.Mtime.Format(time.RFC1123), ContentLength: int64(len(blob.Data)), Etag: blob.Etag, }, }) } } buf, err := xml.Marshal(resp) if err != nil { log.Print(err) rw.WriteHeader(http.StatusInternalServerError) } rw.Write(buf) default: log.Printf("azStubHandler: not implemented: %+v Body:%+q", r, body) rw.WriteHeader(http.StatusNotImplemented) } } // azStubDialer is a net.Dialer that notices when the Azure driver // tries to connect to "devstoreaccount1.blob.127.0.0.1:46067", and // in such cases transparently dials "127.0.0.1:46067" instead. type azStubDialer struct { net.Dialer } var localHostPortRe = regexp.MustCompile(`(127\.0\.0\.1|localhost|\[::1\]):\d+`) func (d *azStubDialer) Dial(network, address string) (net.Conn, error) { if hp := localHostPortRe.FindString(address); hp != "" { log.Println("azStubDialer: dial", hp, "instead of", address) address = hp } return d.Dialer.Dial(network, address) } type TestableAzureBlobVolume struct { *AzureBlobVolume azHandler *azStubHandler azStub *httptest.Server t TB } func NewTestableAzureBlobVolume(t TB, readonly bool, replication int) *TestableAzureBlobVolume { azHandler := newAzStubHandler() azStub := httptest.NewServer(azHandler) var azClient storage.Client container := azureTestContainer if container == "" { // Connect to stub instead of real Azure storage service stubURLBase := strings.Split(azStub.URL, "://")[1] var err error if azClient, err = storage.NewClient(emulatorAccountName, emulatorAccountKey, stubURLBase, storage.DefaultAPIVersion, false); err != nil { t.Fatal(err) } container = "fakecontainername" } else { // Connect to real Azure storage service accountKey, err := readKeyFromFile(azureStorageAccountKeyFile) if err != nil { t.Fatal(err) } azClient, err = storage.NewBasicClient(azureStorageAccountName, accountKey) if err != nil { t.Fatal(err) } } v := NewAzureBlobVolume(azClient, container, readonly, replication) return &TestableAzureBlobVolume{ AzureBlobVolume: v, azHandler: azHandler, azStub: azStub, t: t, } } func TestAzureBlobVolumeWithGeneric(t *testing.T) { defer func(t http.RoundTripper) { http.DefaultTransport = t }(http.DefaultTransport) http.DefaultTransport = &http.Transport{ Dial: (&azStubDialer{}).Dial, } azureWriteRaceInterval = time.Millisecond azureWriteRacePollTime = time.Nanosecond DoGenericVolumeTests(t, func(t TB) TestableVolume { return NewTestableAzureBlobVolume(t, false, azureStorageReplication) }) } func TestAzureBlobVolumeConcurrentRanges(t *testing.T) { defer func(b int) { azureMaxGetBytes = b }(azureMaxGetBytes) defer func(t http.RoundTripper) { http.DefaultTransport = t }(http.DefaultTransport) http.DefaultTransport = &http.Transport{ Dial: (&azStubDialer{}).Dial, } azureWriteRaceInterval = time.Millisecond azureWriteRacePollTime = time.Nanosecond // Test (BlockSize mod azureMaxGetBytes)==0 and !=0 cases for _, azureMaxGetBytes = range []int{2 << 22, 2<<22 - 1} { DoGenericVolumeTests(t, func(t TB) TestableVolume { return NewTestableAzureBlobVolume(t, false, azureStorageReplication) }) } } func TestReadonlyAzureBlobVolumeWithGeneric(t *testing.T) { defer func(t http.RoundTripper) { http.DefaultTransport = t }(http.DefaultTransport) http.DefaultTransport = &http.Transport{ Dial: (&azStubDialer{}).Dial, } azureWriteRaceInterval = time.Millisecond azureWriteRacePollTime = time.Nanosecond DoGenericVolumeTests(t, func(t TB) TestableVolume { return NewTestableAzureBlobVolume(t, true, azureStorageReplication) }) } func TestAzureBlobVolumeRangeFenceposts(t *testing.T) { defer func(t http.RoundTripper) { http.DefaultTransport = t }(http.DefaultTransport) http.DefaultTransport = &http.Transport{ Dial: (&azStubDialer{}).Dial, } v := NewTestableAzureBlobVolume(t, false, 3) defer v.Teardown() for _, size := range []int{ 2<<22 - 1, // one