--- /dev/null
+package keepclient
+
+import (
+ "crypto/md5"
+ "crypto/tls"
+ "encoding/json"
+ "errors"
+ "fmt"
+ "io"
+ "io/ioutil"
+ "log"
+ "net/http"
+ "os"
+ "sort"
+ "strconv"
+)
+
+type KeepClient struct {
+ ApiServer string
+ ApiToken string
+ ApiInsecure bool
+ Service_roots []string
+ Want_replicas int
+ client *http.Client
+}
+
+type KeepDisk struct {
+ Hostname string `json:"service_host"`
+ Port int `json:"service_port"`
+ SSL bool `json:"service_ssl_flag"`
+}
+
+func MakeKeepClient() (kc *KeepClient, err error) {
+ kc = &KeepClient{
+ ApiServer: os.Getenv("ARVADOS_API_HOST"),
+ ApiToken: os.Getenv("ARVADOS_API_TOKEN"),
+ ApiInsecure: (os.Getenv("ARVADOS_API_HOST_INSECURE") != ""),
+ Want_replicas: 2}
+
+ tr := &http.Transport{
+ TLSClientConfig: &tls.Config{InsecureSkipVerify: kc.ApiInsecure},
+ }
+
+ kc.client = &http.Client{Transport: tr}
+
+ err = kc.DiscoverKeepDisks()
+
+ return kc, err
+}
+
+func (this *KeepClient) DiscoverKeepDisks() error {
+ // Construct request of keep disk list
+ var req *http.Request
+ var err error
+ if req, err = http.NewRequest("GET", fmt.Sprintf("https://%s/arvados/v1/keep_disks", this.ApiServer), nil); err != nil {
+ return err
+ }
+
+ // Add api token header
+ req.Header.Add("Authorization", fmt.Sprintf("OAuth2 %s", this.ApiToken))
+
+ // Make the request
+ var resp *http.Response
+ if resp, err = this.client.Do(req); err != nil {
+ return err
+ }
+
+ type SvcList struct {
+ Items []KeepDisk `json:"items"`
+ }
+
+ // Decode json reply
+ dec := json.NewDecoder(resp.Body)
+ var m SvcList
+ if err := dec.Decode(&m); err != nil {
+ return err
+ }
+
+ listed := make(map[string]bool)
+ this.Service_roots = make([]string, 0, len(m.Items))
+
+ for _, element := range m.Items {
+ n := ""
+ if element.SSL {
+ n = "s"
+ }
+
+ // Construct server URL
+ url := fmt.Sprintf("http%s://%s:%d", n, element.Hostname, element.Port)
+
+ // Skip duplicates
+ if !listed[url] {
+ listed[url] = true
+ this.Service_roots = append(this.Service_roots, url)
+ }
+ }
+
+ // Must be sorted for ShuffledServiceRoots() to produce consistent
+ // results.
+ sort.Strings(this.Service_roots)
+
+ return nil
+}
+
+func (this KeepClient) ShuffledServiceRoots(hash string) (pseq []string) {
+ // Build an ordering with which to query the Keep servers based on the
+ // contents of the hash. "hash" is a hex-encoded number at least 8
+ // digits (32 bits) long
+
+ // seed used to calculate the next keep server from 'pool' to be added
+ // to 'pseq'
+ seed := hash
+
+ // Keep servers still to be added to the ordering
+ pool := make([]string, len(this.Service_roots))
+ copy(pool, this.Service_roots)
+
+ // output probe sequence
+ pseq = make([]string, 0, len(this.Service_roots))
+
+ // iterate while there are servers left to be assigned
+ for len(pool) > 0 {
+
+ if len(seed) < 8 {
+ // ran out of digits in the seed
+ if len(pseq) < (len(hash) / 4) {
+ // the number of servers added to the probe
+ // sequence is less than the number of 4-digit
+ // slices in 'hash' so refill the seed with the
+ // last 4 digits.
+ seed = hash[len(hash)-4:]
+ }
+ seed += hash
+ }
+
+ // Take the next 8 digits (32 bytes) and interpret as an integer,
+ // then modulus with the size of the remaining pool to get the next
+ // selected server.
+ probe, _ := strconv.ParseUint(seed[0:8], 16, 32)
+ probe %= uint64(len(pool))
+
+ // Append the selected server to the probe sequence and remove it
+ // from the pool.
+ pseq = append(pseq, pool[probe])
+ pool = append(pool[:probe], pool[probe+1:]...)
+
+ // Remove the digits just used from the seed
+ seed = seed[8:]
+ }
+ return pseq
+}
+
+type ReaderSlice struct {
+ slice []byte
+ reader_error error
+}
+
+// Read repeatedly from the reader into the specified buffer, and report each
+// read to channel 'c'. Completes when Reader 'r' reports on the error channel
+// and closes channel 'c'.
+func ReadIntoBuffer(buffer []byte, r io.Reader, slices chan<- ReaderSlice) {
+ defer close(slices)
+
+ // Initially use entire buffer as scratch space
+ ptr := buffer[:]
+ for {
+ var n int
+ var err error
+ if len(ptr) > 0 {
+ // Read into the scratch space
+ n, err = r.Read(ptr)
+ } else {
+ // Ran out of scratch space, try reading one more byte
+ var b [1]byte
+ n, err = r.Read(b[:])
+
+ if n > 0 {
+ // Reader has more data but we have nowhere to
+ // put it, so we're stuffed
+ slices <- ReaderSlice{nil, io.ErrShortBuffer}
+ } else {
+ // Return some other error (hopefully EOF)
+ slices <- ReaderSlice{nil, err}
+ }
+ return
+ }
+
+ // End on error (includes EOF)
+ if err != nil {
+ slices <- ReaderSlice{nil, err}
+ return
+ }
+
+ if n > 0 {
+ // Make a slice with the contents of the read
+ slices <- ReaderSlice{ptr[:n], nil}
+
+ // Adjust the scratch space slice
+ ptr = ptr[n:]
+ }
+ }
+}
+
+// A read request to the Transfer() function
+type ReadRequest struct {
+ offset int
+ maxsize int
+ result chan<- ReadResult
+}
+
+// A read result from the Transfer() function
+type ReadResult struct {
+ slice []byte
+ err error
+}
+
+// Reads from the buffer managed by the Transfer()
+type BufferReader struct {
+ offset *int
+ requests chan<- ReadRequest
+ responses chan ReadResult
+}
+
+func MakeBufferReader(requests chan<- ReadRequest) BufferReader {
+ return BufferReader{new(int), requests, make(chan ReadResult)}
+}
+
+// Reads from the buffer managed by the Transfer()
+func (this BufferReader) Read(p []byte) (n int, err error) {
+ this.requests <- ReadRequest{*this.offset, len(p), this.responses}
+ rr, valid := <-this.responses
+ if valid {
+ *this.offset += len(rr.slice)
+ return copy(p, rr.slice), rr.err
+ } else {
+ return 0, io.ErrUnexpectedEOF
+ }
+}
+
+func (this BufferReader) WriteTo(dest io.Writer) (written int64, err error) {
+ // Record starting offset in order to correctly report the number of bytes sent
+ starting_offset := *this.offset
+ for {
+ this.requests <- ReadRequest{*this.offset, 32 * 1024, this.responses}
+ rr, valid := <-this.responses
+ if valid {
+ log.Printf("WriteTo slice %v %d %v", *this.offset, len(rr.slice), rr.err)
+ *this.offset += len(rr.slice)
+ if rr.err != nil {
+ if rr.err == io.EOF {
+ // EOF is not an error.
+ return int64(*this.offset - starting_offset), nil
+ } else {
+ return int64(*this.offset - starting_offset), rr.err
+ }
+ } else {
+ dest.Write(rr.slice)
+ }
+ } else {
+ return int64(*this.offset), io.ErrUnexpectedEOF
+ }
+ }
+}
+
+// Close the responses channel
+func (this BufferReader) Close() error {
+ close(this.responses)
+ return nil
+}
+
+// Handle a read request. Returns true if a response was sent, and false if
+// the request should be queued.
+func HandleReadRequest(req ReadRequest, body []byte, complete bool) bool {
+ log.Printf("HandleReadRequest %d %d %d", req.offset, req.maxsize, len(body))
+ if req.offset < len(body) {
+ var end int
+ if req.offset+req.maxsize < len(body) {
+ end = req.offset + req.maxsize
+ } else {
+ end = len(body)
+ }
+ req.result <- ReadResult{body[req.offset:end], nil}
+ return true
+ } else if complete && req.offset >= len(body) {
+ req.result <- ReadResult{nil, io.EOF}
+ return true
+ } else {
+ return false
+ }
+}
+
+// If 'source_reader' is not nil, reads data from 'source_reader' and stores it
+// in the provided buffer. Otherwise, use the contents of 'buffer' as is.
+// Accepts read requests on the buffer on the 'requests' channel. Completes
+// when 'requests' channel is closed.
+func Transfer(source_buffer []byte, source_reader io.Reader, requests <-chan ReadRequest, reader_error chan error) {
+ // currently buffered data
+ var body []byte
+
+ // for receiving slices from ReadIntoBuffer
+ var slices chan ReaderSlice = nil
+
+ // indicates whether the buffered data is complete
+ var complete bool = false
+
+ if source_reader != nil {
+ // 'body' is the buffer slice representing the body content read so far
+ body = source_buffer[:0]
+
+ // used to communicate slices of the buffer as they are
+ // ReadIntoBuffer will close 'slices' when it is done with it
+ slices = make(chan ReaderSlice)
+
+ // Spin it off
+ go ReadIntoBuffer(source_buffer, source_reader, slices)
+ } else {
+ // use the whole buffer
+ body = source_buffer[:]
+
+ // buffer is complete
+ complete = true
+ }
+
+ pending_requests := make([]ReadRequest, 0)
+
+ for {
+ select {
+ case req, valid := <-requests:
+ // Handle a buffer read request
+ if valid {
+ if !HandleReadRequest(req, body, complete) {
+ pending_requests = append(pending_requests, req)
+ }
+ } else {
+ // closed 'requests' channel indicates we're done
+ return
+ }
+
+ case bk, valid := <-slices:
+ // Got a new slice from the reader
+ if valid {
+ if bk.reader_error != nil {
+ reader_error <- bk.reader_error
+ if bk.reader_error == io.EOF {
+ // EOF indicates the reader is done
+ // sending, so our buffer is complete.
+ complete = true
+ } else {
+ // some other reader error
+ return
+ }
+ }
+
+ if bk.slice != nil {
+ // adjust body bounds now that another slice has been read
+ body = source_buffer[0 : len(body)+len(bk.slice)]
+ }
+
+ // handle pending reads
+ n := 0
+ for n < len(pending_requests) {
+ if HandleReadRequest(pending_requests[n], body, complete) {
+
+ // move the element from the
+ // back of the slice to
+ // position 'n', then shorten
+ // the slice by one element
+ pending_requests[n] = pending_requests[len(pending_requests)-1]
+ pending_requests = pending_requests[0 : len(pending_requests)-1]
+ } else {
+
+ // Request wasn't handled, so keep it in the request slice
+ n += 1
+ }
+ }
+ } else {
+ if complete {
+ // no more reads
+ slices = nil
+ } else {
+ // reader channel closed without signaling EOF
+ reader_error <- io.ErrUnexpectedEOF
+ return
+ }
+ }
+ }
+ }
+}
+
+type UploadStatus struct {
+ Err error
+ Url string
+ StatusCode int
+}
+
+func (this KeepClient) uploadToKeepServer(host string, hash string, body io.ReadCloser,
+ upload_status chan<- UploadStatus, expectedLength int64) {
+
+ log.Printf("Uploading to %s", host)
+
+ var req *http.Request
+ var err error
+ var url = fmt.Sprintf("%s/%s", host, hash)
+ if req, err = http.NewRequest("PUT", url, nil); err != nil {
+ upload_status <- UploadStatus{err, url, 0}
+ return
+ }
+
+ if expectedLength > 0 {
+ req.ContentLength = expectedLength
+ }
+
+ req.Header.Add("Authorization", fmt.Sprintf("OAuth2 %s", this.ApiToken))
+ req.Header.Add("Content-Type", "application/octet-stream")
+ req.Body = body
+
+ var resp *http.Response
+ if resp, err = this.client.Do(req); err != nil {
+ upload_status <- UploadStatus{err, url, 0}
+ return
+ }
+
+ if resp.StatusCode == http.StatusOK {
+ upload_status <- UploadStatus{nil, url, resp.StatusCode}
+ } else {
+ upload_status <- UploadStatus{errors.New(resp.Status), url, resp.StatusCode}
+ }
+}
+
+var InsufficientReplicasError = errors.New("Could not write sufficient replicas")
+
+func (this KeepClient) putReplicas(
+ hash string,
+ requests chan ReadRequest,
+ reader_status chan error,
+ expectedLength int64) (replicas int, err error) {
+
+ // Calculate the ordering for uploading to servers
+ sv := this.ShuffledServiceRoots(hash)
+
+ // The next server to try contacting
+ next_server := 0
+
+ // The number of active writers
+ active := 0
+
+ // Used to communicate status from the upload goroutines
+ upload_status := make(chan UploadStatus)
+ defer close(upload_status)
+
+ // Desired number of replicas
+ remaining_replicas := this.Want_replicas
+
+ for remaining_replicas > 0 {
+ for active < remaining_replicas {
+ // Start some upload requests
+ if next_server < len(sv) {
+ go this.uploadToKeepServer(sv[next_server], hash, MakeBufferReader(requests), upload_status, expectedLength)
+ next_server += 1
+ active += 1
+ } else {
+ return (this.Want_replicas - remaining_replicas), InsufficientReplicasError
+ }
+ }
+
+ // Now wait for something to happen.
+ select {
+ case status := <-reader_status:
+ if status == io.EOF {
+ // good news!
+ } else {
+ // bad news
+ return (this.Want_replicas - remaining_replicas), status
+ }
+ case status := <-upload_status:
+ if status.StatusCode == 200 {
+ // good news!
+ remaining_replicas -= 1
+ } else {
+ // writing to keep server failed for some reason
+ log.Printf("Keep server put to %v failed with '%v'",
+ status.Url, status.Err)
+ }
+ active -= 1
+ log.Printf("Upload status %v %v %v", status.StatusCode, remaining_replicas, active)
+ }
+ }
+
+ return (this.Want_replicas - remaining_replicas), nil
+}
+
+var OversizeBlockError = errors.New("Block too big")
+
+func (this KeepClient) PutHR(hash string, r io.Reader, expectedLength int64) (replicas int, err error) {
+
+ // Buffer for reads from 'r'
+ var buffer []byte
+ if expectedLength > 0 {
+ if expectedLength > 64*1024*1024 {
+ return 0, OversizeBlockError
+ }
+ buffer = make([]byte, expectedLength)
+ } else {
+ buffer = make([]byte, 64*1024*1024)
+ }
+
+ // Read requests on Transfer() buffer
+ requests := make(chan ReadRequest)
+ defer close(requests)
+
+ // Reporting reader error states
+ reader_status := make(chan error)
+ defer close(reader_status)
+
+ // Start the transfer goroutine
+ go Transfer(buffer, r, requests, reader_status)
+
+ return this.putReplicas(hash, requests, reader_status, expectedLength)
+}
+
+func (this KeepClient) PutHB(hash string, buffer []byte) (replicas int, err error) {
+ // Read requests on Transfer() buffer
+ requests := make(chan ReadRequest)
+ defer close(requests)
+
+ // Start the transfer goroutine
+ go Transfer(buffer, nil, requests, nil)
+
+ return this.putReplicas(hash, requests, nil, int64(len(buffer)))
+}
+
+func (this KeepClient) PutB(buffer []byte) (hash string, replicas int, err error) {
+ hash = fmt.Sprintf("%x", md5.Sum(buffer))
+ replicas, err = this.PutHB(hash, buffer)
+ return hash, replicas, err
+}
+
+func (this KeepClient) PutR(r io.Reader) (hash string, replicas int, err error) {
+ if buffer, err := ioutil.ReadAll(r); err != nil {
+ return "", 0, err
+ } else {
+ return this.PutB(buffer)
+ }
+}
+
+var BlockNotFound = errors.New("Block not found")
+
+func (this KeepClient) Get(hash string) (reader io.ReadCloser,
+ contentLength int64, url string, err error) {
+
+ // Calculate the ordering for uploading to servers
+ sv := this.ShuffledServiceRoots(hash)
+
+ for _, host := range sv {
+ var req *http.Request
+ var err error
+ var url = fmt.Sprintf("%s/%s", host, hash)
+ if req, err = http.NewRequest("GET", url, nil); err != nil {
+ continue
+ }
+
+ req.Header.Add("Authorization", fmt.Sprintf("OAuth2 %s", this.ApiToken))
+
+ var resp *http.Response
+ if resp, err = this.client.Do(req); err != nil {
+ continue
+ }
+
+ if resp.StatusCode == http.StatusOK {
+ return resp.Body, resp.ContentLength, url, nil
+ }
+ }
+
+ return nil, 0, "", BlockNotFound
+}
--- /dev/null
+package keepclient
+
+import (
+ "crypto/md5"
+ "flag"
+ "fmt"
+ . "gopkg.in/check.v1"
+ "io"
+ "io/ioutil"
+ "log"
+ "net"
+ "net/http"
+ "os"
+ "os/exec"
+ "sort"
+ "testing"
+ "time"
+)
+
+// Gocheck boilerplate
+func Test(t *testing.T) { TestingT(t) }
+
+// Gocheck boilerplate
+var _ = Suite(&ServerRequiredSuite{})
+var _ = Suite(&StandaloneSuite{})
+
+var no_server = flag.Bool("no-server", false, "Skip 'ServerRequireSuite'")
+
+// Tests that require the Keep server running
+type ServerRequiredSuite struct{}
+
+// Standalone tests
+type StandaloneSuite struct{}
+
+func (s *ServerRequiredSuite) SetUpSuite(c *C) {
+ if *no_server {
+ c.Skip("Skipping tests that require server")
+ } else {
+ os.Chdir(os.ExpandEnv("$GOPATH../python"))
+ exec.Command("python", "run_test_server.py", "start").Run()
+ exec.Command("python", "run_test_server.py", "start_keep").Run()
+ }
+}
+
+func (s *ServerRequiredSuite) TearDownSuite(c *C) {
+ os.Chdir(os.ExpandEnv("$GOPATH../python"))
+ exec.Command("python", "run_test_server.py", "stop_keep").Run()
+ exec.Command("python", "run_test_server.py", "stop").Run()
+}
+
+func (s *ServerRequiredSuite) TestMakeKeepClient(c *C) {
+ os.Setenv("ARVADOS_API_HOST", "localhost:3001")
+ os.Setenv("ARVADOS_API_TOKEN", "4axaw8zxe0qm22wa6urpp5nskcne8z88cvbupv653y1njyi05h")
+ os.Setenv("ARVADOS_API_HOST_INSECURE", "")
+
+ kc, err := MakeKeepClient()
+ c.Assert(kc.ApiServer, Equals, "localhost:3001")
+ c.Assert(kc.ApiToken, Equals, "4axaw8zxe0qm22wa6urpp5nskcne8z88cvbupv653y1njyi05h")
+ c.Assert(kc.ApiInsecure, Equals, false)
+
+ os.Setenv("ARVADOS_API_HOST_INSECURE", "true")
+
+ kc, err = MakeKeepClient()
+ c.Assert(kc.ApiServer, Equals, "localhost:3001")
+ c.Assert(kc.ApiToken, Equals, "4axaw8zxe0qm22wa6urpp5nskcne8z88cvbupv653y1njyi05h")
+ c.Assert(kc.ApiInsecure, Equals, true)
+
+ c.Assert(err, Equals, nil)
+ c.Assert(len(kc.Service_roots), Equals, 2)
+ c.Assert(kc.Service_roots[0], Equals, "http://localhost:25107")
+ c.Assert(kc.Service_roots[1], Equals, "http://localhost:25108")
+}
+
+func (s *StandaloneSuite) TestShuffleServiceRoots(c *C) {
+ kc := KeepClient{Service_roots: []string{"http://localhost:25107", "http://localhost:25108", "http://localhost:25109", "http://localhost:25110", "http://localhost:25111", "http://localhost:25112", "http://localhost:25113", "http://localhost:25114", "http://localhost:25115", "http://localhost:25116", "http://localhost:25117", "http://localhost:25118", "http://localhost:25119", "http://localhost:25120", "http://localhost:25121", "http://localhost:25122", "http://localhost:25123"}}
+
+ // "foo" acbd18db4cc2f85cedef654fccc4a4d8
+ foo_shuffle := []string{"http://localhost:25116", "http://localhost:25120", "http://localhost:25119", "http://localhost:25122", "http://localhost:25108", "http://localhost:25114", "http://localhost:25112", "http://localhost:25107", "http://localhost:25118", "http://localhost:25111", "http://localhost:25113", "http://localhost:25121", "http://localhost:25110", "http://localhost:25117", "http://localhost:25109", "http://localhost:25115", "http://localhost:25123"}
+ c.Check(kc.ShuffledServiceRoots("acbd18db4cc2f85cedef654fccc4a4d8"), DeepEquals, foo_shuffle)
+
+ // "bar" 37b51d194a7513e45b56f6524f2d51f2
+ bar_shuffle := []string{"http://localhost:25108", "http://localhost:25112", "http://localhost:25119", "http://localhost:25107", "http://localhost:25110", "http://localhost:25116", "http://localhost:25122", "http://localhost:25120", "http://localhost:25121", "http://localhost:25117", "http://localhost:25111", "http://localhost:25123", "http://localhost:25118", "http://localhost:25113", "http://localhost:25114", "http://localhost:25115", "http://localhost:25109"}
+ c.Check(kc.ShuffledServiceRoots("37b51d194a7513e45b56f6524f2d51f2"), DeepEquals, bar_shuffle)
+}
+
+func ReadIntoBufferHelper(c *C, bufsize int) {
+ buffer := make([]byte, bufsize)
+
+ reader, writer := io.Pipe()
+ slices := make(chan ReaderSlice)
+
+ go ReadIntoBuffer(buffer, reader, slices)
+
+ {
+ out := make([]byte, 128)
+ for i := 0; i < 128; i += 1 {
+ out[i] = byte(i)
+ }
+ writer.Write(out)
+ s1 := <-slices
+ c.Check(len(s1.slice), Equals, 128)
+ c.Check(s1.reader_error, Equals, nil)
+ for i := 0; i < 128; i += 1 {
+ c.Check(s1.slice[i], Equals, byte(i))
+ }
+ for i := 0; i < len(buffer); i += 1 {
+ if i < 128 {
+ c.Check(buffer[i], Equals, byte(i))
+ } else {
+ c.Check(buffer[i], Equals, byte(0))
+ }
+ }
+ }
+ {
+ out := make([]byte, 96)
+ for i := 0; i < 96; i += 1 {
+ out[i] = byte(i / 2)
+ }
+ writer.Write(out)
+ s1 := <-slices
+ c.Check(len(s1.slice), Equals, 96)
+ c.Check(s1.reader_error, Equals, nil)
+ for i := 0; i < 96; i += 1 {
+ c.Check(s1.slice[i], Equals, byte(i/2))
+ }
+ for i := 0; i < len(buffer); i += 1 {
+ if i < 128 {
+ c.Check(buffer[i], Equals, byte(i))
+ } else if i < (128 + 96) {
+ c.Check(buffer[i], Equals, byte((i-128)/2))
+ } else {
+ c.Check(buffer[i], Equals, byte(0))
+ }
+ }
+ }
+ {
+ writer.Close()
+ s1 := <-slices
+ c.Check(len(s1.slice), Equals, 0)
+ c.Check(s1.reader_error, Equals, io.EOF)
+ }
+}
+
+func (s *StandaloneSuite) TestReadIntoBuffer(c *C) {
+ ReadIntoBufferHelper(c, 512)
+ ReadIntoBufferHelper(c, 225)
+ ReadIntoBufferHelper(c, 224)
+}
+
+func (s *StandaloneSuite) TestReadIntoShortBuffer(c *C) {
+ buffer := make([]byte, 223)
+ reader, writer := io.Pipe()
+ slices := make(chan ReaderSlice)
+
+ go ReadIntoBuffer(buffer, reader, slices)
+
+ {
+ out := make([]byte, 128)
+ for i := 0; i < 128; i += 1 {
+ out[i] = byte(i)
+ }
+ writer.Write(out)
+ s1 := <-slices
+ c.Check(len(s1.slice), Equals, 128)
+ c.Check(s1.reader_error, Equals, nil)
+ for i := 0; i < 128; i += 1 {
+ c.Check(s1.slice[i], Equals, byte(i))
+ }
+ for i := 0; i < len(buffer); i += 1 {
+ if i < 128 {
+ c.Check(buffer[i], Equals, byte(i))
+ } else {
+ c.Check(buffer[i], Equals, byte(0))
+ }
+ }
+ }
+ {
+ out := make([]byte, 96)
+ for i := 0; i < 96; i += 1 {
+ out[i] = byte(i / 2)
+ }
+
+ // Write will deadlock because it can't write all the data, so
+ // spin it off to a goroutine
+ go writer.Write(out)
+ s1 := <-slices
+
+ c.Check(len(s1.slice), Equals, 95)
+ c.Check(s1.reader_error, Equals, nil)
+ for i := 0; i < 95; i += 1 {
+ c.Check(s1.slice[i], Equals, byte(i/2))
+ }
+ for i := 0; i < len(buffer); i += 1 {
+ if i < 128 {
+ c.Check(buffer[i], Equals, byte(i))
+ } else if i < (128 + 95) {
+ c.Check(buffer[i], Equals, byte((i-128)/2))
+ } else {
+ c.Check(buffer[i], Equals, byte(0))
+ }
+ }
+ }
+ {
+ writer.Close()
+ s1 := <-slices
+ c.Check(len(s1.slice), Equals, 0)
+ c.Check(s1.reader_error, Equals, io.ErrShortBuffer)
+ }
+
+}
+
+func (s *StandaloneSuite) TestTransfer(c *C) {
+ reader, writer := io.Pipe()
+
+ // Buffer for reads from 'r'
+ buffer := make([]byte, 512)
+
+ // Read requests on Transfer() buffer
+ requests := make(chan ReadRequest)
+ defer close(requests)
+
+ // Reporting reader error states
+ reader_status := make(chan error)
+
+ go Transfer(buffer, reader, requests, reader_status)
+
+ br1 := MakeBufferReader(requests)
+ out := make([]byte, 128)
+
+ {
+ // Write some data, and read into a buffer shorter than
+ // available data
+ for i := 0; i < 128; i += 1 {
+ out[i] = byte(i)
+ }
+
+ writer.Write(out[:100])
+
+ in := make([]byte, 64)
+ n, err := br1.Read(in)
+
+ c.Check(n, Equals, 64)
+ c.Check(err, Equals, nil)
+
+ for i := 0; i < 64; i += 1 {
+ c.Check(in[i], Equals, out[i])
+ }
+ }
+
+ {
+ // Write some more data, and read into buffer longer than
+ // available data
+ in := make([]byte, 64)
+ n, err := br1.Read(in)
+ c.Check(n, Equals, 36)
+ c.Check(err, Equals, nil)
+
+ for i := 0; i < 36; i += 1 {
+ c.Check(in[i], Equals, out[64+i])
+ }
+
+ }
+
+ {
+ // Test read before write
+ type Rd struct {
+ n int
+ err error
+ }
+ rd := make(chan Rd)
+ in := make([]byte, 64)
+
+ go func() {
+ n, err := br1.Read(in)
+ rd <- Rd{n, err}
+ }()
+
+ time.Sleep(100 * time.Millisecond)
+ writer.Write(out[100:])
+
+ got := <-rd
+
+ c.Check(got.n, Equals, 28)
+ c.Check(got.err, Equals, nil)
+
+ for i := 0; i < 28; i += 1 {
+ c.Check(in[i], Equals, out[100+i])
+ }
+ }
+
+ br2 := MakeBufferReader(requests)
+ {
+ // Test 'catch up' reader
+ in := make([]byte, 256)
+ n, err := br2.Read(in)
+
+ c.Check(n, Equals, 128)
+ c.Check(err, Equals, nil)
+
+ for i := 0; i < 128; i += 1 {
+ c.Check(in[i], Equals, out[i])
+ }
+ }
+
+ {
+ // Test closing the reader
+ writer.Close()
+ status := <-reader_status
+ c.Check(status, Equals, io.EOF)
+
+ in := make([]byte, 256)
+ n1, err1 := br1.Read(in)
+ n2, err2 := br2.Read(in)
+ c.Check(n1, Equals, 0)
+ c.Check(err1, Equals, io.EOF)
+ c.Check(n2, Equals, 0)
+ c.Check(err2, Equals, io.EOF)
+ }
+
+ {
+ // Test 'catch up' reader after closing
+ br3 := MakeBufferReader(requests)
+ in := make([]byte, 256)
+ n, err := br3.Read(in)
+
+ c.Check(n, Equals, 128)
+ c.Check(err, Equals, nil)
+
+ for i := 0; i < 128; i += 1 {
+ c.Check(in[i], Equals, out[i])
+ }
+
+ n, err = br3.Read(in)
+
+ c.Check(n, Equals, 0)
+ c.Check(err, Equals, io.EOF)
+ }
+}
+
+func (s *StandaloneSuite) TestTransferShortBuffer(c *C) {
+ reader, writer := io.Pipe()
+
+ // Buffer for reads from 'r'
+ buffer := make([]byte, 100)
+
+ // Read requests on Transfer() buffer
+ requests := make(chan ReadRequest)
+ defer close(requests)
+
+ // Reporting reader error states
+ reader_status := make(chan error)
+
+ go Transfer(buffer, reader, requests, reader_status)
+
+ out := make([]byte, 101)
+ go writer.Write(out)
+
+ status := <-reader_status
+ c.Check(status, Equals, io.ErrShortBuffer)
+}
+
+func (s *StandaloneSuite) TestTransferFromBuffer(c *C) {
+ // Buffer for reads from 'r'
+ buffer := make([]byte, 100)
+ for i := 0; i < 100; i += 1 {
+ buffer[i] = byte(i)
+ }
+
+ // Read requests on Transfer() buffer
+ requests := make(chan ReadRequest)
+ defer close(requests)
+
+ go Transfer(buffer, nil, requests, nil)
+
+ br1 := MakeBufferReader(requests)
+
+ in := make([]byte, 64)
+ {
+ n, err := br1.Read(in)
+
+ c.Check(n, Equals, 64)
+ c.Check(err, Equals, nil)
+
+ for i := 0; i < 64; i += 1 {
+ c.Check(in[i], Equals, buffer[i])
+ }
+ }
+ {
+ n, err := br1.Read(in)
+
+ c.Check(n, Equals, 36)
+ c.Check(err, Equals, nil)
+
+ for i := 0; i < 36; i += 1 {
+ c.Check(in[i], Equals, buffer[64+i])
+ }
+ }
+ {
+ n, err := br1.Read(in)
+
+ c.Check(n, Equals, 0)
+ c.Check(err, Equals, io.EOF)
+ }
+}
+
+func (s *StandaloneSuite) TestTransferIoCopy(c *C) {
+ // Buffer for reads from 'r'
+ buffer := make([]byte, 100)
+ for i := 0; i < 100; i += 1 {
+ buffer[i] = byte(i)
+ }
+
+ // Read requests on Transfer() buffer
+ requests := make(chan ReadRequest)
+ defer close(requests)
+
+ go Transfer(buffer, nil, requests, nil)
+
+ br1 := MakeBufferReader(requests)
+
+ reader, writer := io.Pipe()
+
+ go func() {
+ p := make([]byte, 100)
+ n, err := reader.Read(p)
+ c.Check(n, Equals, 100)
+ c.Check(err, Equals, nil)
+ c.Check(p, DeepEquals, buffer)
+ }()
+
+ io.Copy(writer, br1)
+}
+
+type StubPutHandler struct {
+ c *C
+ expectPath string
+ expectApiToken string
+ expectBody string
+ handled chan string
+}
+
+func (this StubPutHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+ this.c.Check(req.URL.Path, Equals, "/"+this.expectPath)
+ this.c.Check(req.Header.Get("Authorization"), Equals, fmt.Sprintf("OAuth2 %s", this.expectApiToken))
+ body, err := ioutil.ReadAll(req.Body)
+ this.c.Check(err, Equals, nil)
+ this.c.Check(body, DeepEquals, []byte(this.expectBody))
+ resp.WriteHeader(200)
+ this.handled <- fmt.Sprintf("http://%s", req.Host)
+}
+
+func RunBogusKeepServer(st http.Handler, port int) (listener net.Listener, url string) {
+ server := http.Server{Handler: st}
+
+ var err error
+ listener, err = net.ListenTCP("tcp", &net.TCPAddr{Port: port})
+ if err != nil {
+ panic(fmt.Sprintf("Could not listen on tcp port %v", port))
+ }
+
+ url = fmt.Sprintf("http://localhost:%d", listener.Addr().(*net.TCPAddr).Port)
+
+ go server.Serve(listener)
+ return listener, url
+}
+
+func UploadToStubHelper(c *C, st http.Handler, f func(*KeepClient, string,
+ io.ReadCloser, io.WriteCloser, chan UploadStatus)) {
+
+ listener, url := RunBogusKeepServer(st, 2990)
+ defer listener.Close()
+
+ kc, _ := MakeKeepClient()
+ kc.ApiToken = "abc123"
+
+ reader, writer := io.Pipe()
+ upload_status := make(chan UploadStatus)
+
+ f(kc, url, reader, writer, upload_status)
+}
+
+func (s *StandaloneSuite) TestUploadToStubKeepServer(c *C) {
+ st := StubPutHandler{
+ c,
+ "acbd18db4cc2f85cedef654fccc4a4d8",
+ "abc123",
+ "foo",
+ make(chan string)}
+
+ UploadToStubHelper(c, st,
+ func(kc *KeepClient, url string, reader io.ReadCloser,
+ writer io.WriteCloser, upload_status chan UploadStatus) {
+
+ go kc.uploadToKeepServer(url, st.expectPath, reader, upload_status, int64(len("foo")))
+
+ writer.Write([]byte("foo"))
+ writer.Close()
+
+ <-st.handled
+ status := <-upload_status
+ c.Check(status, DeepEquals, UploadStatus{nil, fmt.Sprintf("%s/%s", url, st.expectPath), 200})
+ })
+}
+
+func (s *StandaloneSuite) TestUploadToStubKeepServerBufferReader(c *C) {
+ st := StubPutHandler{
+ c,
+ "acbd18db4cc2f85cedef654fccc4a4d8",
+ "abc123",
+ "foo",
+ make(chan string)}
+
+ UploadToStubHelper(c, st,
+ func(kc *KeepClient, url string, reader io.ReadCloser,
+ writer io.WriteCloser, upload_status chan UploadStatus) {
+
+ // Buffer for reads from 'r'
+ buffer := make([]byte, 512)
+
+ // Read requests on Transfer() buffer
+ requests := make(chan ReadRequest)
+ defer close(requests)
+
+ // Reporting reader error states
+ reader_status := make(chan error)
+
+ go Transfer(buffer, reader, requests, reader_status)
+
+ br1 := MakeBufferReader(requests)
+
+ go kc.uploadToKeepServer(url, st.expectPath, br1, upload_status, 3)
+
+ writer.Write([]byte("foo"))
+ writer.Close()
+
+ <-reader_status
+ <-st.handled
+
+ status := <-upload_status
+ c.Check(status, DeepEquals, UploadStatus{nil, fmt.Sprintf("%s/%s", url, st.expectPath), 200})
+
+ //c.Check(true, Equals, false)
+ })
+}
+
+type FailHandler struct {
+ handled chan string
+}
+
+func (this FailHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+ resp.WriteHeader(400)
+ this.handled <- fmt.Sprintf("http://%s", req.Host)
+}
+
+func (s *StandaloneSuite) TestFailedUploadToStubKeepServer(c *C) {
+ st := FailHandler{
+ make(chan string)}
+
+ hash := "acbd18db4cc2f85cedef654fccc4a4d8"
+
+ UploadToStubHelper(c, st,
+ func(kc *KeepClient, url string, reader io.ReadCloser,
+ writer io.WriteCloser, upload_status chan UploadStatus) {
+
+ go kc.uploadToKeepServer(url, hash, reader, upload_status, 3)
+
+ writer.Write([]byte("foo"))
+ writer.Close()
+
+ <-st.handled
+
+ status := <-upload_status
+ c.Check(status.Url, Equals, fmt.Sprintf("%s/%s", url, hash))
+ c.Check(status.StatusCode, Equals, 400)
+ })
+
+}
+
+type KeepServer struct {
+ listener net.Listener
+ url string
+}
+
+func RunSomeFakeKeepServers(st http.Handler, n int, port int) (ks []KeepServer) {
+ ks = make([]KeepServer, n)
+
+ for i := 0; i < n; i += 1 {
+ boguslistener, bogusurl := RunBogusKeepServer(st, port+i)
+ ks[i] = KeepServer{boguslistener, bogusurl}
+ }
+
+ return ks
+}
+
+func (s *StandaloneSuite) TestPutB(c *C) {
+ log.Printf("TestPutB")
+
+ hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
+
+ st := StubPutHandler{
+ c,
+ hash,
+ "abc123",
+ "foo",
+ make(chan string, 2)}
+
+ kc, _ := MakeKeepClient()
+
+ kc.Want_replicas = 2
+ kc.ApiToken = "abc123"
+ kc.Service_roots = make([]string, 5)
+
+ ks := RunSomeFakeKeepServers(st, 5, 2990)
+
+ for i := 0; i < len(ks); i += 1 {
+ kc.Service_roots[i] = ks[i].url
+ defer ks[i].listener.Close()
+ }
+
+ sort.Strings(kc.Service_roots)
+
+ kc.PutB([]byte("foo"))
+
+ shuff := kc.ShuffledServiceRoots(fmt.Sprintf("%x", md5.Sum([]byte("foo"))))
+
+ c.Check(<-st.handled, Equals, shuff[0])
+ c.Check(<-st.handled, Equals, shuff[1])
+}
+
+func (s *StandaloneSuite) TestPutHR(c *C) {
+ log.Printf("TestPutHR")
+
+ hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
+
+ st := StubPutHandler{
+ c,
+ hash,
+ "abc123",
+ "foo",
+ make(chan string, 2)}
+
+ kc, _ := MakeKeepClient()
+
+ kc.Want_replicas = 2
+ kc.ApiToken = "abc123"
+ kc.Service_roots = make([]string, 5)
+
+ ks := RunSomeFakeKeepServers(st, 5, 2990)
+
+ for i := 0; i < len(ks); i += 1 {
+ kc.Service_roots[i] = ks[i].url
+ defer ks[i].listener.Close()
+ }
+
+ sort.Strings(kc.Service_roots)
+
+ reader, writer := io.Pipe()
+
+ go func() {
+ writer.Write([]byte("foo"))
+ writer.Close()
+ }()
+
+ kc.PutHR(hash, reader, 3)
+
+ shuff := kc.ShuffledServiceRoots(hash)
+ log.Print(shuff)
+
+ s1 := <-st.handled
+ s2 := <-st.handled
+
+ c.Check((s1 == shuff[0] && s2 == shuff[1]) ||
+ (s1 == shuff[1] && s2 == shuff[0]),
+ Equals,
+ true)
+}
+
+func (s *StandaloneSuite) TestPutWithFail(c *C) {
+ log.Printf("TestPutWithFail")
+
+ hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
+
+ st := StubPutHandler{
+ c,
+ hash,
+ "abc123",
+ "foo",
+ make(chan string, 2)}
+
+ fh := FailHandler{
+ make(chan string, 1)}
+
+ kc, _ := MakeKeepClient()
+
+ kc.Want_replicas = 2
+ kc.ApiToken = "abc123"
+ kc.Service_roots = make([]string, 5)
+
+ ks1 := RunSomeFakeKeepServers(st, 4, 2990)
+ ks2 := RunSomeFakeKeepServers(fh, 1, 2995)
+
+ for i, k := range ks1 {
+ kc.Service_roots[i] = k.url
+ defer k.listener.Close()
+ }
+ for i, k := range ks2 {
+ kc.Service_roots[len(ks1)+i] = k.url
+ defer k.listener.Close()
+ }
+
+ sort.Strings(kc.Service_roots)
+
+ shuff := kc.ShuffledServiceRoots(fmt.Sprintf("%x", md5.Sum([]byte("foo"))))
+
+ phash, replicas, err := kc.PutB([]byte("foo"))
+
+ <-fh.handled
+
+ c.Check(err, Equals, nil)
+ c.Check(phash, Equals, hash)
+ c.Check(replicas, Equals, 2)
+ c.Check(<-st.handled, Equals, shuff[1])
+ c.Check(<-st.handled, Equals, shuff[2])
+}
+
+func (s *StandaloneSuite) TestPutWithTooManyFail(c *C) {
+ log.Printf("TestPutWithTooManyFail")
+
+ hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
+
+ st := StubPutHandler{
+ c,
+ hash,
+ "abc123",
+ "foo",
+ make(chan string, 1)}
+
+ fh := FailHandler{
+ make(chan string, 4)}
+
+ kc, _ := MakeKeepClient()
+
+ kc.Want_replicas = 2
+ kc.ApiToken = "abc123"
+ kc.Service_roots = make([]string, 5)
+
+ ks1 := RunSomeFakeKeepServers(st, 1, 2990)
+ ks2 := RunSomeFakeKeepServers(fh, 4, 2991)
+
+ for i, k := range ks1 {
+ kc.Service_roots[i] = k.url
+ defer k.listener.Close()
+ }
+ for i, k := range ks2 {
+ kc.Service_roots[len(ks1)+i] = k.url
+ defer k.listener.Close()
+ }
+
+ sort.Strings(kc.Service_roots)
+
+ shuff := kc.ShuffledServiceRoots(fmt.Sprintf("%x", md5.Sum([]byte("foo"))))
+
+ _, replicas, err := kc.PutB([]byte("foo"))
+
+ c.Check(err, Equals, InsufficientReplicasError)
+ c.Check(replicas, Equals, 1)
+ c.Check(<-st.handled, Equals, shuff[1])
+}
+
+type StubGetHandler struct {
+ c *C
+ expectPath string
+ expectApiToken string
+ returnBody []byte
+}
+
+func (this StubGetHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+ this.c.Check(req.URL.Path, Equals, "/"+this.expectPath)
+ this.c.Check(req.Header.Get("Authorization"), Equals, fmt.Sprintf("OAuth2 %s", this.expectApiToken))
+ resp.Header().Set("Content-Length", fmt.Sprintf("%d", len(this.returnBody)))
+ resp.Write(this.returnBody)
+}
+
+func (s *StandaloneSuite) TestGet(c *C) {
+
+ hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
+
+ st := StubGetHandler{
+ c,
+ hash,
+ "abc123",
+ []byte("foo")}
+
+ listener, url := RunBogusKeepServer(st, 2990)
+ defer listener.Close()
+
+ kc, _ := MakeKeepClient()
+ kc.ApiToken = "abc123"
+ kc.Service_roots = []string{url}
+
+ r, n, url2, err := kc.Get(hash)
+ c.Check(err, Equals, nil)
+ c.Check(n, Equals, int64(3))
+ c.Check(url2, Equals, fmt.Sprintf("%s/%s", url, hash))
+
+ content, err2 := ioutil.ReadAll(r)
+ c.Check(err2, Equals, nil)
+ c.Check(content, DeepEquals, []byte("foo"))
+}
+
+func (s *StandaloneSuite) TestGetFail(c *C) {
+ hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
+
+ st := FailHandler{make(chan string, 1)}
+
+ listener, url := RunBogusKeepServer(st, 2990)
+ defer listener.Close()
+
+ kc, _ := MakeKeepClient()
+ kc.ApiToken = "abc123"
+ kc.Service_roots = []string{url}
+
+ r, n, url2, err := kc.Get(hash)
+ c.Check(err, Equals, BlockNotFound)
+ c.Check(n, Equals, int64(0))
+ c.Check(url2, Equals, "")
+ c.Check(r, Equals, nil)
+}
+
+func (s *StandaloneSuite) TestGetWithFailures(c *C) {
+
+ hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
+
+ fh := FailHandler{
+ make(chan string, 1)}
+
+ st := StubGetHandler{
+ c,
+ hash,
+ "abc123",
+ []byte("foo")}
+
+ kc, _ := MakeKeepClient()
+ kc.ApiToken = "abc123"
+ kc.Service_roots = make([]string, 5)
+
+ ks1 := RunSomeFakeKeepServers(st, 1, 2990)
+ ks2 := RunSomeFakeKeepServers(fh, 4, 2991)
+
+ for i, k := range ks1 {
+ kc.Service_roots[i] = k.url
+ defer k.listener.Close()
+ }
+ for i, k := range ks2 {
+ kc.Service_roots[len(ks1)+i] = k.url
+ defer k.listener.Close()
+ }
+
+ sort.Strings(kc.Service_roots)
+
+ r, n, url2, err := kc.Get(hash)
+ <-fh.handled
+ c.Check(err, Equals, nil)
+ c.Check(n, Equals, int64(3))
+ c.Check(url2, Equals, fmt.Sprintf("%s/%s", ks1[0].url, hash))
+
+ content, err2 := ioutil.ReadAll(r)
+ c.Check(err2, Equals, nil)
+ c.Check(content, DeepEquals, []byte("foo"))
+}
+
+func (s *ServerRequiredSuite) TestPutAndGet(c *C) {
+ os.Setenv("ARVADOS_API_HOST", "localhost:3001")
+ os.Setenv("ARVADOS_API_TOKEN", "4axaw8zxe0qm22wa6urpp5nskcne8z88cvbupv653y1njyi05h")
+ os.Setenv("ARVADOS_API_HOST_INSECURE", "true")
+
+ kc, err := MakeKeepClient()
+ c.Assert(err, Equals, nil)
+
+ hash, replicas, err := kc.PutB([]byte("foo"))
+ c.Check(hash, Equals, fmt.Sprintf("%x", md5.Sum([]byte("foo"))))
+ c.Check(replicas, Equals, 2)
+ c.Check(err, Equals, nil)
+
+ r, n, url2, err := kc.Get(hash)
+ c.Check(err, Equals, nil)
+ c.Check(n, Equals, int64(3))
+ c.Check(url2, Equals, fmt.Sprintf("http://localhost:25108/%s", hash))
+
+ content, err2 := ioutil.ReadAll(r)
+ c.Check(err2, Equals, nil)
+ c.Check(content, DeepEquals, []byte("foo"))
+}
projects / arvados.git / commitdiff