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package gitlabnet
import (
"bytes"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"net/http"
"strings"
"gitlab.com/gitlab-org/gitlab-shell/go/internal/config"
)
const (
internalApiPath = "/api/v4/internal"
secretHeaderName = "Gitlab-Shared-Secret"
)
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) {
path = normalizePath(path)
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 <= 299 {
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("GET", path, nil)
}
func (c *GitlabClient) Post(path string, data interface{}) (*http.Response, error) {
return c.doRequest("POST", 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
}
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