Fix CLI unable to get pod logs from controller (#1451)

pkg/controller/client/function.go

@@ -19,10 +19,15 @@ package client
 import (
 	"encoding/json"
 	"fmt"
+	"io"
+	"net/http"
+	"net/url"
 
+	"github.com/pkg/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
 	fv1 "github.com/fission/fission/pkg/apis/fission.io/v1"
+	"github.com/fission/fission/pkg/fission-cli/console"
 )
 
 func (c *Client) FunctionCreate(f *fv1.Function) (*metav1.ObjectMeta, error) {
@@ -152,3 +157,29 @@ func (c *Client) FunctionList(functionNamespace string) ([]fv1.Function, error)
 
 	return funcs, nil
 }
+
+func (c *Client) FunctionPodLogs(m *metav1.ObjectMeta) (io.ReadCloser, int, error) {
+	relativeUrl := fmt.Sprintf("functions/%v", m.Name)
+	relativeUrl += fmt.Sprintf("?namespace=%v", m.Namespace)
+
+	queryURL, err := url.Parse(c.Url)
+	if err != nil {
+		return nil, 0, errors.Wrapf(err, "error parsing the base URL '%v'", c.Url)
+	}
+	queryURL.Path = fmt.Sprintf("/proxy/logs/%s", m.Name)
+
+	console.Verbose(2, fmt.Sprintf("Try to get pod logs from controller '%v'", queryURL.String()))
+
+	req, err := http.NewRequest(http.MethodPost, queryURL.String(), nil)
+	if err != nil {
+		return nil, 0, errors.Wrap(err, "error creating logs request")
+	}
+
+	httpClient := http.Client{}
+	resp, err := httpClient.Do(req)
+	if err != nil {
+		return nil, 0, errors.Wrap(err, "error executing get logs request")
+	}
+
+	return resp.Body, resp.StatusCode, nil
+}