forked from SkygearIO/skygear-server
/
asset.go
134 lines (119 loc) · 3.94 KB
/
asset.go
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// Copyright 2015-present Oursky Ltd.
//
// 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 handler
import (
"path/filepath"
"strings"
skyAsset "github.com/skygeario/skygear-server/pkg/server/asset"
"github.com/skygeario/skygear-server/pkg/server/logging"
"github.com/skygeario/skygear-server/pkg/server/router"
"github.com/skygeario/skygear-server/pkg/server/skydb"
"github.com/skygeario/skygear-server/pkg/server/skydb/skyconv"
"github.com/skygeario/skygear-server/pkg/server/skyerr"
)
// AssetUploadHandler models the handler for asset upload request
type AssetUploadHandler struct {
AssetStore skyAsset.Store `inject:"AssetStore"`
AccessKey router.Processor `preprocessor:"accesskey"`
DBConn router.Processor `preprocessor:"dbconn"`
PluginReady router.Processor `preprocessor:"plugin_ready"`
preprocessors []router.Processor
}
// AssetUploadResponse models the response of asset upload request
type AssetUploadResponse struct {
PostRequest *skyAsset.PostFileRequest `json:"post-request"`
Asset *map[string]interface{} `json:"asset"`
}
// Setup adds injected pre-processors to preprocessors array
func (h *AssetUploadHandler) Setup() {
h.preprocessors = []router.Processor{
h.AccessKey,
h.DBConn,
h.PluginReady,
}
}
// GetPreprocessors returns all pre-processors for the handler
func (h *AssetUploadHandler) GetPreprocessors() []router.Processor {
return h.preprocessors
}
// Handle is the handling method of the asset upload request
func (h *AssetUploadHandler) Handle(
payload *router.Payload,
response *router.Response,
) {
filename, ok := payload.Data["filename"].(string)
if !ok {
response.Err = skyerr.NewInvalidArgument(
"Missing filename or filename is invalid",
[]string{"filename"},
)
return
}
contentType, ok := payload.Data["content-type"].(string)
if !ok {
response.Err = skyerr.NewInvalidArgument(
"Missing content type or content type is invalid",
[]string{"content-type"},
)
return
}
contentSizeFloat, ok := payload.Data["content-size"].(float64)
if !ok {
response.Err = skyerr.NewInvalidArgument(
"Missing content size or content size is invalid",
[]string{"content-size"},
)
return
}
contentSize := int64(contentSizeFloat)
// Add UUID to Filename
dir, file := filepath.Split(filename)
file = strings.Join([]string{uuidNew(), file}, "-")
filename = filepath.Join(dir, file)
// Generate POST File Request
assetStore := h.AssetStore
postRequest, err := assetStore.GeneratePostFileRequest(filename, contentType, contentSize)
if err != nil {
response.Err = skyerr.NewError(
skyerr.UnexpectedError,
"Fail to generate post file request",
)
return
}
// Save Asset to DB
conn := payload.DBConn
asset := skydb.Asset{
Name: filename,
ContentType: contentType,
Size: contentSize,
}
if err := conn.SaveAsset(&asset); err != nil {
response.Err = skyerr.NewResourceSaveFailureErrWithStringID("asset", asset.Name)
return
}
// Add Signer to Asset for Serialization
if signer, ok := assetStore.(skyAsset.URLSigner); ok {
asset.Signer = signer
} else {
logger := logging.CreateLogger(payload.Context(), "handler")
logger.Warnf("Failed to acquire asset URLSigner, please check configuration")
response.Err = skyerr.NewError(skyerr.UnexpectedError, "Failed to sign the url")
return
}
assetMap := skyconv.ToMap((*skyconv.MapAsset)(&asset))
response.Result = &AssetUploadResponse{
PostRequest: postRequest,
Asset: &assetMap,
}
}