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url.go
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/
url.go
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package server
import (
"context"
"io"
"net/http"
"net/url"
"github.com/docker/go-units"
"gocloud.dev/blob"
"golang.org/x/sync/errgroup"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
"github.com/pachyderm/pachyderm/v2/src/internal/client"
"github.com/pachyderm/pachyderm/v2/src/internal/errors"
"github.com/pachyderm/pachyderm/v2/src/internal/obj"
"github.com/pachyderm/pachyderm/v2/src/internal/promutil"
"github.com/pachyderm/pachyderm/v2/src/internal/storage/fileset"
"github.com/pachyderm/pachyderm/v2/src/internal/task"
"github.com/pachyderm/pachyderm/v2/src/internal/uuid"
"github.com/pachyderm/pachyderm/v2/src/pfs"
)
const (
defaultConcurrency = 50
maxConcurrency = 1000
)
var (
// these are overridden when testing.
defaultNumObjectsThreshold = 1000
defaultSizeThreshold = int64(units.GB)
)
func putFileURL(ctx context.Context, taskService task.Service, uw *fileset.UnorderedWriter, dstPath, tag string, src *pfs.AddFile_URLSource) (n int64, retErr error) {
url, err := url.Parse(src.URL)
if err != nil {
return 0, errors.EnsureStack(err)
}
switch url.Scheme {
case "http", "https":
client := &http.Client{
Transport: promutil.InstrumentRoundTripper("putFileURL", http.DefaultTransport),
}
req, err := http.NewRequestWithContext(ctx, "GET", src.URL, nil)
if err != nil {
return 0, errors.EnsureStack(err)
}
resp, err := client.Do(req)
if err != nil {
return 0, errors.EnsureStack(err)
} else if resp.StatusCode >= 400 {
return 0, errors.Errorf("error retrieving content from %q: %s", src.URL, resp.Status)
}
defer errors.Close(&retErr, resp.Body, "close http body")
return 0, uw.Put(ctx, dstPath, tag, true, resp.Body)
default:
if src.Recursive {
return 0, putFileURLRecursive(ctx, taskService, uw, dstPath, tag, src)
}
url, err := obj.ParseURL(src.URL)
if err != nil {
return 0, errors.EnsureStack(err)
}
bucket, err := openBucket(ctx, url)
if err != nil {
return 0, err
}
defer errors.Close(&retErr, bucket, "close bucket")
r, err := bucket.NewReader(ctx, url.Object, nil)
if err != nil {
return 0, errors.EnsureStack(err)
}
defer errors.Close(&retErr, r, "close reader for bucket %v", url.Bucket)
return 0, uw.Put(ctx, dstPath, tag, true, r)
}
}
type shardCallback func(paths []string, startOffset, endOffset int64) error
func putFileURLRecursive(ctx context.Context, taskService task.Service, uw *fileset.UnorderedWriter, dst, tag string, src *pfs.AddFile_URLSource) error {
inputChan := make(chan *anypb.Any)
eg, ctx := errgroup.WithContext(ctx)
doer := taskService.NewDoer(URLTaskNamespace, uuid.NewWithoutDashes(), nil)
// Create tasks.
eg.Go(func() error {
if err := shardObjects(ctx, src.URL, func(paths []string, startOffset, endOffset int64) error {
input, err := serializePutFileURLTask(&PutFileURLTask{
Dst: dst,
Datum: tag,
URL: src.URL,
Paths: paths,
StartOffset: startOffset,
EndOffset: endOffset,
})
if err != nil {
return err
}
select {
case inputChan <- input:
case <-ctx.Done():
return errors.EnsureStack(context.Cause(ctx))
}
return nil
}); err != nil {
return err
}
close(inputChan)
return nil
})
// Order output from input channel.
eg.Go(func() error {
// TODO: Add cache?
concurrency := src.Concurrency
// We assume '0' here means a user did not set the concurrency in the request, so we should use our default.
if src.Concurrency == 0 {
concurrency = defaultConcurrency
}
if src.Concurrency > maxConcurrency {
concurrency = maxConcurrency
}
return task.DoOrdered(ctx, doer, inputChan, int(concurrency), func(_ int64, output *anypb.Any, _ error) error {
result, err := deserializePutFileURLTaskResult(output)
if err != nil {
return err
}
fsid, err := fileset.ParseID(result.Id)
if err != nil {
return err
}
return errors.EnsureStack(uw.AddFileSet(ctx, *fsid))
})
})
return errors.EnsureStack(eg.Wait())
}
// shardObjects iterates through a list of objects and creates tasks by sharding small files
// into a single shard. Files larger than a shard size will be given their own dedicated shard.
func shardObjects(ctx context.Context, URL string, cb shardCallback) (retErr error) {
url, err := obj.ParseURL(URL)
if err != nil {
return errors.EnsureStack(err)
}
bucket, err := openBucket(ctx, url)
if err != nil {
return err
}
defer errors.Close(&retErr, bucket, "close bucket")
list := bucket.List(&blob.ListOptions{Prefix: url.Object})
var paths []string
var size int64
for {
listObj, err := list.Next(ctx)
if err != nil {
if errors.Is(err, io.EOF) {
break
}
return errors.EnsureStack(err)
}
paths = append(paths, listObj.Key)
size += listObj.Size
if len(paths) >= defaultNumObjectsThreshold || size >= defaultSizeThreshold {
if err := cb(paths, 0, -1); err != nil {
return errors.EnsureStack(err)
}
paths = nil
size = 0
}
}
if len(paths) > 0 {
return cb(paths, 0, -1)
}
return nil
}
func (d *driver) getFileURL(ctx context.Context, taskService task.Service, URL string, file *pfs.File, basePathRange *pfs.PathRange) (int64, error) {
if basePathRange == nil {
basePathRange = &pfs.PathRange{}
}
inputChan := make(chan *anypb.Any)
eg, ctx := errgroup.WithContext(ctx)
eg.Go(func() error {
// TODO: Add cache?
doer := taskService.NewDoer(URLTaskNamespace, uuid.NewWithoutDashes(), nil)
err := doer.Do(ctx, inputChan, func(_ int64, output *anypb.Any, err error) error { return err })
return errors.EnsureStack(err)
})
var bytesWritten int64
eg.Go(func() error {
return d.storage.Filesets.WithRenewer(ctx, defaultTTL, func(ctx context.Context, renewer *fileset.Renewer) error {
fsID, err := d.getFileSet(ctx, file.Commit)
if err != nil {
return err
}
if err := renewer.Add(ctx, *fsID); err != nil {
return err
}
file := proto.Clone(file).(*pfs.File)
file.Commit = client.NewRepo(pfs.DefaultProjectName, client.FileSetsRepoName).NewCommit("", fsID.HexString())
src, err := d.getFile(ctx, file, basePathRange)
if err != nil {
return err
}
pathRange := &pfs.PathRange{
Lower: basePathRange.Lower,
}
createTask := func() error {
input, err := serializeGetFileURLTask(&GetFileURLTask{
URL: URL,
Fileset: fsID.HexString(),
PathRange: pathRange,
})
if err != nil {
return err
}
select {
case inputChan <- input:
case <-ctx.Done():
return errors.EnsureStack(context.Cause(ctx))
}
return nil
}
var numObjects, size int64
if err := src.Iterate(ctx, func(fi *pfs.FileInfo, file fileset.File) error {
if fi.FileType != pfs.FileType_FILE {
return nil
}
bytesWritten += fi.SizeBytes
if numObjects >= int64(defaultNumObjectsThreshold) || size >= defaultSizeThreshold {
pathRange.Upper = file.Index().Path
if err := createTask(); err != nil {
return err
}
pathRange = &pfs.PathRange{
Lower: file.Index().Path,
}
numObjects, size = 0, 0
}
numObjects++
size += fi.SizeBytes
return nil
}); err != nil {
return errors.EnsureStack(err)
}
pathRange.Upper = basePathRange.Upper
if err := createTask(); err != nil {
return err
}
close(inputChan)
return nil
})
})
if err := eg.Wait(); err != nil {
return 0, errors.EnsureStack(err)
}
return bytesWritten, nil
}