mirror of https://github.com/portainer/portainer
107 lines
3.1 KiB
Go
107 lines
3.1 KiB
Go
package responseutils
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"errors"
|
|
"io/ioutil"
|
|
"log"
|
|
"net/http"
|
|
"strconv"
|
|
)
|
|
|
|
// GetResponseAsJSONOBject returns the response content as a generic JSON object
|
|
func GetResponseAsJSONOBject(response *http.Response) (map[string]interface{}, error) {
|
|
responseData, err := getResponseBodyAsGenericJSON(response)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
responseObject := responseData.(map[string]interface{})
|
|
return responseObject, nil
|
|
}
|
|
|
|
// GetResponseAsJSONArray returns the response content as an array of generic JSON object
|
|
func GetResponseAsJSONArray(response *http.Response) ([]interface{}, error) {
|
|
responseData, err := getResponseBodyAsGenericJSON(response)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
switch responseObject := responseData.(type) {
|
|
case []interface{}:
|
|
return responseObject, nil
|
|
case map[string]interface{}:
|
|
if responseObject["message"] != nil {
|
|
return nil, errors.New(responseObject["message"].(string))
|
|
}
|
|
log.Printf("[ERROR] [http,proxy,response] [message: invalid response format, expecting JSON array] [response: %+v]", responseObject)
|
|
return nil, errors.New("unable to parse response: expected JSON array, got JSON object")
|
|
default:
|
|
log.Printf("[ERROR] [http,proxy,response] [message: invalid response format, expecting JSON array] [response: %+v]", responseObject)
|
|
return nil, errors.New("unable to parse response: expected JSON array")
|
|
}
|
|
}
|
|
|
|
func getResponseBodyAsGenericJSON(response *http.Response) (interface{}, error) {
|
|
if response.Body == nil {
|
|
return nil, errors.New("unable to parse response: empty response body")
|
|
}
|
|
|
|
var data interface{}
|
|
body, err := ioutil.ReadAll(response.Body)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
err = response.Body.Close()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
err = json.Unmarshal(body, &data)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return data, nil
|
|
}
|
|
|
|
type dockerErrorResponse struct {
|
|
Message string `json:"message,omitempty"`
|
|
}
|
|
|
|
// WriteAccessDeniedResponse will create a new access denied response
|
|
func WriteAccessDeniedResponse() (*http.Response, error) {
|
|
response := &http.Response{}
|
|
err := RewriteResponse(response, dockerErrorResponse{Message: "access denied to resource"}, http.StatusForbidden)
|
|
return response, err
|
|
}
|
|
|
|
// RewriteAccessDeniedResponse will overwrite the existing response with an access denied response
|
|
func RewriteAccessDeniedResponse(response *http.Response) error {
|
|
return RewriteResponse(response, dockerErrorResponse{Message: "access denied to resource"}, http.StatusForbidden)
|
|
}
|
|
|
|
// RewriteResponse will replace the existing response body and status code with the one specified
|
|
// in parameters
|
|
func RewriteResponse(response *http.Response, newResponseData interface{}, statusCode int) error {
|
|
jsonData, err := json.Marshal(newResponseData)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
body := ioutil.NopCloser(bytes.NewReader(jsonData))
|
|
|
|
response.StatusCode = statusCode
|
|
response.Body = body
|
|
response.ContentLength = int64(len(jsonData))
|
|
|
|
if response.Header == nil {
|
|
response.Header = make(http.Header)
|
|
}
|
|
response.Header.Set("Content-Length", strconv.Itoa(len(jsonData)))
|
|
|
|
return nil
|
|
}
|