7 "git.curoverse.com/arvados.git/sdk/go/arvadosclient"
8 "git.curoverse.com/arvados.git/sdk/go/keepclient"
16 var arv arvadosclient.ArvadosClient
17 var keepClient keepclient.KeepClient
20 Keepstore initiates pull worker channel goroutine.
21 The channel will process pull list.
22 For each (next) pull request:
23 For each locator listed, execute Pull on the server(s) listed
24 Skip the rest of the servers if no errors
27 func RunPullWorker(nextItem <-chan interface{}) {
29 arv, err = arvadosclient.MakeArvadosClient()
31 log.Fatalf("Error setting up arvados client %s", err.Error())
34 keepClient, err = keepclient.MakeKeepClient(&arv)
36 log.Fatalf("Error setting up keep client %s", err.Error())
39 for item := range nextItem {
40 Pull(item.(PullRequest))
45 For each Pull request:
46 Generate a random API token.
47 Generate a permission signature using this token, timestamp ~60 seconds in the future, and desired block hash.
48 Using this token & signature, retrieve the given block.
51 func Pull(pullRequest PullRequest) (err error) {
54 log.Printf("Pull %s success", pullRequest)
56 log.Printf("Pull %s error: %s", pullRequest, err)
60 service_roots := make(map[string]string)
61 for _, addr := range pullRequest.Servers {
62 service_roots[addr] = addr
64 keepClient.SetServiceRoots(service_roots)
66 // Generate signature with a random token
67 PermissionSecret = []byte(os.Getenv("ARVADOS_API_TOKEN"))
68 expires_at := time.Now().Add(60 * time.Second)
69 signedLocator := SignLocator(pullRequest.Locator, GenerateRandomApiToken(), expires_at)
71 reader, contentLen, _, err := GetContent(signedLocator)
77 return errors.New(fmt.Sprintf("No reader found for : %s", signedLocator))
81 read_content, err := ioutil.ReadAll(reader)
86 if (read_content == nil) || (int64(len(read_content)) != contentLen) {
87 return errors.New(fmt.Sprintf("Content not found for: %s", signedLocator))
90 err = PutContent(read_content, pullRequest.Locator)
94 // Fetch the content for the given locator using keepclient.
95 var GetContent = func(signedLocator string) (reader io.ReadCloser, contentLength int64, url string, err error) {
96 reader, blocklen, url, err := keepClient.Get(signedLocator)
97 return reader, blocklen, url, err
100 const ALPHA_NUMERIC = "0123456789abcdefghijklmnopqrstuvwxyz"
102 func GenerateRandomApiToken() string {
103 var bytes = make([]byte, 36)
105 for i, b := range bytes {
106 bytes[i] = ALPHA_NUMERIC[b%byte(len(ALPHA_NUMERIC))]
108 return (string(bytes))
112 var PutContent = func(content []byte, locator string) (err error) {
113 err = PutBlock(content, locator)