define the interface of downloader, data_scheduler, client_stream, re…

…gister, uploader, data_protocol and url protocol.

Signed-off-by: allen.wq <[email protected]>

dfget/corev2/basic/interface.go

@@ -0,0 +1,34 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package basic
+
+// Response defines the response.
+type Response interface {
+	Success() bool
+	Data() interface{}
+}
+
+// RangeRequest defines the range request.
+type RangeRequest interface {
+	URL() string
+	Offset() int64
+	Size() int64
+	Header() map[string]string
+
+	// Extra gets the extra info.
+	Extra() interface{}
+}

dfget/corev2/clientwriter/client_writer.go

@@ -0,0 +1,31 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package clientwriter
+
+import (
+	"github.com/dragonflyoss/Dragonfly/pkg/protocol"
+)
+
+// ClientStream defines how to organize distribution data for range request.
+// An instance binds to a range request.
+// It may receive a lot of distribution data.
+// Developer could add a io.WriteCloser in constructor of instance, and the ClientWriter will
+// write request data to io.Writer.
+type ClientWriter interface {
+	// WriteData writes the distribution data from other peers, it may be called more times.
+	PutData(data protocol.DistributionData) error
+}

dfget/corev2/datascheduler/data_scheduler.go

@@ -0,0 +1,65 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package datascheduler
+
+import (
+	"context"
+
+	"github.com/dragonflyoss/Dragonfly/dfget/corev2/basic"
+
+	strfmt "github.com/go-openapi/strfmt"
+)
+
+// PeerInfo represents the target address which is provided the download data.
+type PeerInfo struct {
+	IP   strfmt.IPv4
+	Port int32
+	Path string
+	// ID represents the client ID of peer.
+	ID string
+}
+
+// SchedulerResult defines the result of schedule of range data.
+type SchedulePieceDataResult struct {
+	Off  int64
+	Size int64
+
+	// PeerInfos represents the schedule peers which to get the range data.
+	PeerInfos []*PeerInfo
+}
+
+// SchedulerResult defines the schedule result of request range.
+// For some implementation, developer could do more than one schedule for the same request range.
+type SchedulerResult interface {
+	// Result get the schedule result for range data which may not include all data of request range.
+	Result() []*SchedulePieceDataResult
+
+	// State gets the temporary states of this schedule which binds to range request.
+	State() ScheduleState
+}
+
+// ScheduleState defines the state of this schedule.
+type ScheduleState interface {
+	// Continue tells user if reschedule the request range again.
+	Continue() bool
+}
+
+// DataScheduler defines how to schedule peers for range request.
+type DataScheduler interface {
+	// state should be got from SchedulerResult which is got from last caller for the same range request.
+	Schedule(ctx context.Context, rr basic.RangeRequest, state ScheduleState) (SchedulerResult, error)
+}

dfget/corev2/downloader/downloader.go

@@ -0,0 +1,28 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package downloader
+
+import (
+	"context"
+	"io"
+)
+
+// Downloader defines how to download file range from peer/cdn, an instance binds to <task, target address>.
+type Downloader interface {
+	// Download downloads range data.
+	Download(ctx context.Context, off, size int64) (io.ReadCloser, error)
+}

dfget/corev2/regist/register.go

@@ -0,0 +1,24 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package regist
+
+import "github.com/dragonflyoss/Dragonfly/dfget/corev2/basic"
+
+// SupernodeRegister encapsulates the Register steps into a struct.
+type SupernodeRegister interface {
+	Register(peerPort int) (response basic.Response, err error)
+}

dfget/corev2/report/reporter.go

@@ -0,0 +1,27 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package report
+
+import (
+	"github.com/dragonflyoss/Dragonfly/dfget/corev2/basic"
+	"github.com/dragonflyoss/Dragonfly/dfget/locator"
+)
+
+// Reporter defines how to report resource to suprnode.
+type Reporter interface {
+	Report(supernode *locator.Supernode) (basic.Response, error)
+}

dfget/corev2/uploader/uploader.go

@@ -0,0 +1,25 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package uploader
+
+import "io"
+
+// Uploader defines how to upload range by path.
+type Uploader interface {
+	// UploadRange defines how to upload range by path.
+	UploadRange(path string, off, size int64, opt interface{}) (io.ReadCloser, error)
+}

pkg/protocol/distributiondata.go

@@ -0,0 +1,88 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package protocol
+
+import (
+	"context"
+	"io"
+)
+
+// DataEncoder defines how to encode/decode data.
+type DataEncoder interface {
+	// Encode data.
+	Encode(io.Reader) (io.Reader, error)
+
+	// Decode data.
+	Decode(io.Reader) (io.Reader, error)
+}
+
+// DataType defines the type of DistributionData.
+type DataType interface {
+	// String return the type string.
+	String() string
+
+	// Encoder return the encoder of the type.
+	Encoder() DataEncoder
+}
+
+// DistributionData defines the protocol of distribute data which is exchanged in peers.
+type DistributionData interface {
+	// Type gets the data type.
+	Type() DataType
+
+	// Size gets the size of data.
+	Size() int64
+
+	// Metadata gets the metadata.
+	Metadata() interface{}
+
+	// Content gets the content of data.
+	Content(ctx context.Context) (io.Reader, error)
+}
+
+type eofDataType struct{}
+
+func (ty eofDataType) String() string {
+	return "EOF"
+}
+
+func (ty *eofDataType) Encoder() DataEncoder {
+	return nil
+}
+
+// EOFDistributionData represents the eof of file.
+type eofDistributionData struct{}
+
+func (eof *eofDistributionData) Size() int64 {
+	return 0
+}
+
+func (eof *eofDistributionData) Metadata() interface{} {
+	return nil
+}
+
+func (eof *eofDistributionData) Content(ctx context.Context) (io.Reader, error) {
+	return nil, io.EOF
+}
+
+func (eof *eofDistributionData) Type() DataType {
+	return &eofDataType{}
+}
+
+func NewEoFDistributionData() DistributionData {
+	return &eofDistributionData{}
+}