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/*
* Copyright 2020 Intel Corporation, Inc
*
* 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 api
import (
"bytes"
"encoding/base64"
"encoding/json"
"io"
"io/ioutil"
"mime"
"mime/multipart"
"net/http"
"net/textproto"
moduleLib "github.com/onap/multicloud-k8s/src/orchestrator/pkg/module"
"github.com/onap/multicloud-k8s/src/orchestrator/utils"
"github.com/gorilla/mux"
)
// appHandler to store backend implementations objects
// Also simplifies mocking for unit testing purposes
type appHandler struct {
// Interface that implements App operations
// We will set this variable with a mock interface for testing
client moduleLib.AppManager
}
// createAppHandler handles creation of the App entry in the database
// This is a multipart handler. See following example curl request
// curl -X POST http://localhost:9015/v2/projects/sampleProject/composite-apps/sampleCompositeApp/v1/apps \
// -F "metadata={\"metadata\":{\"name\":\"app\",\"description\":\"sample app\",\"UserData1\":\"data1\",\"UserData2\":\"data2\"}};type=application/json" \
// -F file=@/pathToFile
func (h appHandler) createAppHandler(w http.ResponseWriter, r *http.Request) {
var a moduleLib.App
var ac moduleLib.AppContent
// Implemenation using multipart form
// Set Max size to 16mb here
err := r.ParseMultipartForm(16777216)
if err != nil {
http.Error(w, err.Error(), http.StatusUnprocessableEntity)
return
}
jsn := bytes.NewBuffer([]byte(r.FormValue("metadata")))
err = json.NewDecoder(jsn).Decode(&a)
switch {
case err == io.EOF:
http.Error(w, "Empty body", http.StatusBadRequest)
return
case err != nil:
http.Error(w, err.Error(), http.StatusUnprocessableEntity)
return
}
// Name is required.
if a.Metadata.Name == "" {
http.Error(w, "Missing name in POST request", http.StatusBadRequest)
return
}
//Read the file section and ignore the header
file, _, err := r.FormFile("file")
if err != nil {
http.Error(w, "Unable to process file", http.StatusUnprocessableEntity)
return
}
defer file.Close()
//Convert the file content to base64 for storage
content, err := ioutil.ReadAll(file)
if err != nil {
http.Error(w, "Unable to read file", http.StatusUnprocessableEntity)
return
}
err = utils.IsTarGz(bytes.NewBuffer(content))
if err != nil {
http.Error(w, "Error in file format", http.StatusUnprocessableEntity)
return
}
ac.FileContent = base64.StdEncoding.EncodeToString(content)
vars := mux.Vars(r)
projectName := vars["project-name"]
compositeAppName := vars["composite-app-name"]
compositeAppVersion := vars["version"]
ret, err := h.client.CreateApp(a, ac, projectName, compositeAppName, compositeAppVersion)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusCreated)
err = json.NewEncoder(w).Encode(ret)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
// getAppHandler handles GET operations on a particular App Name
// Returns an app
func (h appHandler) getAppHandler(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
projectName := vars["project-name"]
compositeAppName := vars["composite-app-name"]
compositeAppVersion := vars["version"]
name := vars["app-name"]
// handle the get all apps case - return a list of only the json parts
if len(name) == 0 {
var retList []moduleLib.App
ret, err := h.client.GetApps(projectName, compositeAppName, compositeAppVersion)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
for _, app := range ret {
retList = append(retList, moduleLib.App{Metadata: app.Metadata})
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
err = json.NewEncoder(w).Encode(retList)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
return
}
accepted, _, err := mime.ParseMediaType(r.Header.Get("Accept"))
if err != nil {
http.Error(w, err.Error(), http.StatusNotAcceptable)
return
}
var retApp moduleLib.App
var retAppContent moduleLib.AppContent
retApp, err = h.client.GetApp(name, projectName, compositeAppName, compositeAppVersion)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
retAppContent, err = h.client.GetAppContent(name, projectName, compositeAppName, compositeAppVersion)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
switch accepted {
case "multipart/form-data":
mpw := multipart.NewWriter(w)
w.Header().Set("Content-Type", mpw.FormDataContentType())
w.WriteHeader(http.StatusOK)
pw, err := mpw.CreatePart(textproto.MIMEHeader{"Content-Type": {"application/json"}, "Content-Disposition": {"form-data; name=metadata"}})
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if err := json.NewEncoder(pw).Encode(retApp); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
pw, err = mpw.CreatePart(textproto.MIMEHeader{"Content-Type": {"application/octet-stream"}, "Content-Disposition": {"form-data; name=file; filename=fileContent"}})
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
fcBytes, err := base64.StdEncoding.DecodeString(retAppContent.FileContent)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
_, err = pw.Write(fcBytes)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
case "application/json":
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
err = json.NewEncoder(w).Encode(retApp)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
case "application/octet-stream":
w.Header().Set("Content-Type", "application/octet-stream")
w.WriteHeader(http.StatusOK)
fcBytes, err := base64.StdEncoding.DecodeString(retAppContent.FileContent)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
_, err = w.Write(fcBytes)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
default:
http.Error(w, "set Accept: multipart/form-data, application/json or application/octet-stream", http.StatusMultipleChoices)
return
}
}
// deleteAppHandler handles DELETE operations on a particular App Name
func (h appHandler) deleteAppHandler(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
projectName := vars["project-name"]
compositeAppName := vars["composite-app-name"]
compositeAppVersion := vars["version"]
name := vars["app-name"]
err := h.client.DeleteApp(name, projectName, compositeAppName, compositeAppVersion)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.WriteHeader(http.StatusNoContent)
}
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