Create kubeconfig files in kubeconfig dir

The connectivity api should allow the creation
of kubeconfig files in the kubeconfig dir.

Issue-ID: MULTICLOUD-292
Change-Id: I5ecc92622648c6c90b71ffad433a132e191cf4b3
Signed-off-by: Kiran Kamineni <kiran.k.kamineni@intel.com>

2 files changed, 68 insertions, 9 deletions

diff --git a/src/k8splugin/internal/connection/connection.go b/src/k8splugin/internal/connection/connection.go
index dbd1c2e1..b2bdca32 100644
--- a/src/k8splugin/internal/connection/connection.go
+++ b/src/k8splugin/internal/connection/connection.go
@@ -17,7 +17,11 @@
 package connection
 
 import (
+	"encoding/base64"
 	"encoding/json"
+	"io/ioutil"
+	"path/filepath"
+
 	"k8splugin/internal/db"
 
 	pkgerrors "github.com/pkg/errors"
@@ -27,7 +31,7 @@ import (
 type Connection struct {
 	CloudRegion           string                 `json:"cloud-region"`
 	CloudOwner            string                 `json:"cloud-owner"`
-	Kubeconfig            map[string]interface{} `json:"kubeconfig"`
+	Kubeconfig            string                 `json:"kubeconfig"`
 	OtherConnectivityList map[string]interface{} `json:"other-connectivity-list"`
 }
 
@@ -47,14 +51,14 @@ func (dk ConnectionKey) String() string {
 	return string(out)
 }
 
-//  ConnectionManager is an interface exposes the Connection functionality
+// ConnectionManager is an interface exposes the Connection functionality
 type ConnectionManager interface {
 	Create(c Connection) (Connection, error)
 	Get(name string) (Connection, error)
 	Delete(name string) error
 }
 
-//  ConnectionClient implements the  ConnectionManager
+// ConnectionClient implements the  ConnectionManager
 // It will also be used to maintain some localized state
 type ConnectionClient struct {
 	storeName string
@@ -113,7 +117,7 @@ func (v *ConnectionClient) Get(name string) (Connection, error) {
 	return Connection{}, pkgerrors.New("Error getting Connection")
 }
 
-// Delete the  Connection from database
+// Delete the Connection from database
 func (v *ConnectionClient) Delete(name string) error {
 
 	//Construct the composite key to select the entry
@@ -124,3 +128,28 @@ func (v *ConnectionClient) Delete(name string) error {
 	}
 	return nil
 }
+
+// Download the connection information onto a kubeconfig file
+// The file is named after the name of the connection and will
+// be placed in the provided parent directory
+func (v *ConnectionClient) Download(name string, parentdir string) (string, error) {
+
+	conn, err := v.Get(name)
+	if err != nil {
+		return "", pkgerrors.Wrap(err, "Getting Connection info")
+	}
+
+	//Decode the kubeconfig from base64 to string
+	kubeContent, err := base64.StdEncoding.DecodeString(conn.Kubeconfig)
+	if err != nil {
+		return "", pkgerrors.Wrap(err, "Converting from base64")
+	}
+
+	target := filepath.Join(parentdir, conn.CloudRegion)
+	err = ioutil.WriteFile(target, kubeContent, 0644)
+	if err != nil {
+		return "", pkgerrors.Wrap(err, "Writing kubeconfig to file")
+	}
+
+	return target, nil
+}
diff --git a/src/k8splugin/internal/connection/connectionhandler.go b/src/k8splugin/internal/connection/connectionhandler.go
index 0f8014fa..8c860d31 100644
--- a/src/k8splugin/internal/connection/connectionhandler.go
+++ b/src/k8splugin/internal/connection/connectionhandler.go
@@ -17,8 +17,11 @@
 package connection
 
 import (
+	"bytes"
+	"encoding/base64"
 	"encoding/json"
 	"io"
+	"io/ioutil"
 	"net/http"
 
 	"github.com/gorilla/mux"
@@ -32,11 +35,25 @@ type ConnectionHandler struct {
 	Client ConnectionManager
 }
 
-// createHandler handles creation of the connectivity entry in the database
+// CreateHandler handles creation of the connectivity entry in the database
+// This is a multipart handler. See following example curl request
+// curl -i -F "metadata={\"cloud-region\":\"kud\",\"cloud-owner\":\"me\"};type=application/json" \
+//         -F file=@/home/user/.kube/config \
+//         -X POST http://localhost:8081/v1/connectivity-info
 func (h ConnectionHandler) CreateHandler(w http.ResponseWriter, r *http.Request) {
 	var v Connection
 
-	err := json.NewDecoder(r.Body).Decode(&v)
+	// Implemenation using multipart form
+	// Review and enable/remove at a later date
+	// 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(&v)
 	switch {
 	case err == io.EOF:
 		http.Error(w, "Empty body", http.StatusBadRequest)
@@ -58,11 +75,24 @@ func (h ConnectionHandler) CreateHandler(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
-	// Kubeconfig is required.
-	if v.Kubeconfig == nil {
-		http.Error(w, "Missing Kubeconfig in POST request", http.StatusBadRequest)
+	//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
+	}
+
+	v.Kubeconfig = base64.StdEncoding.EncodeToString(content)
+
 	ret, err := h.Client.Create(v)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)