Merge branch '173-move-go-code-up-one-level' into 'master'

Move Go code up one level

See merge request gitlab-org/gitlab-shell!350

1 files changed, 132 insertions, 0 deletions

diff --git a/internal/gitlabnet/client.go b/internal/gitlabnet/client.go
new file mode 100644
index 0000000..bb8655a
--- /dev/null
+++ b/internal/gitlabnet/client.go
@@ -0,0 +1,132 @@
+package gitlabnet
+
+import (
+	"bytes"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	"gitlab.com/gitlab-org/gitlab-shell/internal/config"
+)
+
+const (
+	internalApiPath  = "/api/v4/internal"
+	secretHeaderName = "Gitlab-Shared-Secret"
+)
+
+var (
+	ParsingError = fmt.Errorf("Parsing failed")
+)
+
+type ErrorResponse struct {
+	Message string `json:"message"`
+}
+
+type GitlabClient struct {
+	httpClient *http.Client
+	config     *config.Config
+	host       string
+}
+
+func GetClient(config *config.Config) (*GitlabClient, error) {
+	client := config.GetHttpClient()
+
+	if client == nil {
+		return nil, fmt.Errorf("Unsupported protocol")
+	}
+
+	return &GitlabClient{httpClient: client.HttpClient, config: config, host: client.Host}, nil
+}
+
+func normalizePath(path string) string {
+	if !strings.HasPrefix(path, "/") {
+		path = "/" + path
+	}
+
+	if !strings.HasPrefix(path, internalApiPath) {
+		path = internalApiPath + path
+	}
+	return path
+}
+
+func newRequest(method, host, path string, data interface{}) (*http.Request, error) {
+	var jsonReader io.Reader
+	if data != nil {
+		jsonData, err := json.Marshal(data)
+		if err != nil {
+			return nil, err
+		}
+
+		jsonReader = bytes.NewReader(jsonData)
+	}
+
+	request, err := http.NewRequest(method, host+path, jsonReader)
+	if err != nil {
+		return nil, err
+	}
+
+	return request, nil
+}
+
+func parseError(resp *http.Response) error {
+	if resp.StatusCode >= 200 && resp.StatusCode <= 399 {
+		return nil
+	}
+	defer resp.Body.Close()
+	parsedResponse := &ErrorResponse{}
+
+	if err := json.NewDecoder(resp.Body).Decode(parsedResponse); err != nil {
+		return fmt.Errorf("Internal API error (%v)", resp.StatusCode)
+	} else {
+		return fmt.Errorf(parsedResponse.Message)
+	}
+
+}
+
+func (c *GitlabClient) Get(path string) (*http.Response, error) {
+	return c.DoRequest(http.MethodGet, normalizePath(path), nil)
+}
+
+func (c *GitlabClient) Post(path string, data interface{}) (*http.Response, error) {
+	return c.DoRequest(http.MethodPost, normalizePath(path), data)
+}
+
+func (c *GitlabClient) DoRequest(method, path string, data interface{}) (*http.Response, error) {
+	request, err := newRequest(method, c.host, path, data)
+	if err != nil {
+		return nil, err
+	}
+
+	user, password := c.config.HttpSettings.User, c.config.HttpSettings.Password
+	if user != "" && password != "" {
+		request.SetBasicAuth(user, password)
+	}
+
+	encodedSecret := base64.StdEncoding.EncodeToString([]byte(c.config.Secret))
+	request.Header.Set(secretHeaderName, encodedSecret)
+
+	request.Header.Add("Content-Type", "application/json")
+	request.Close = true
+
+	response, err := c.httpClient.Do(request)
+	if err != nil {
+		return nil, fmt.Errorf("Internal API unreachable")
+	}
+
+	if err := parseError(response); err != nil {
+		return nil, err
+	}
+
+	return response, nil
+}
+
+func ParseJSON(hr *http.Response, response interface{}) error {
+	if err := json.NewDecoder(hr.Body).Decode(response); err != nil {
+		return ParsingError
+	}
+
+	return nil
+}