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// SPDX-License-Identifier: GPL-3.0-or-later
package fluentd
import (
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"path"
"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
)
const pluginsPath = "/api/plugins.json"
type pluginsInfo struct {
Payload []pluginData `json:"plugins"`
}
type pluginData struct {
ID string `json:"plugin_id"`
Type string `json:"type"`
Category string `json:"plugin_category"`
RetryCount *int64 `json:"retry_count"`
BufferTotalQueuedSize *int64 `json:"buffer_total_queued_size"`
BufferQueueLength *int64 `json:"buffer_queue_length"`
}
func (p pluginData) hasCategory() bool {
return p.RetryCount != nil
}
func (p pluginData) hasBufferQueueLength() bool {
return p.BufferQueueLength != nil
}
func (p pluginData) hasBufferTotalQueuedSize() bool {
return p.BufferTotalQueuedSize != nil
}
func newAPIClient(client *http.Client, request web.Request) *apiClient {
return &apiClient{httpClient: client, request: request}
}
type apiClient struct {
httpClient *http.Client
request web.Request
}
func (a apiClient) getPluginsInfo() (*pluginsInfo, error) {
req, err := a.createRequest(pluginsPath)
if err != nil {
return nil, fmt.Errorf("error on creating request : %v", err)
}
resp, err := a.doRequestOK(req)
defer closeBody(resp)
if err != nil {
return nil, err
}
var info pluginsInfo
if err = json.NewDecoder(resp.Body).Decode(&info); err != nil {
return nil, fmt.Errorf("error on decoding response from %s : %v", req.URL, err)
}
return &info, nil
}
func (a apiClient) doRequestOK(req *http.Request) (*http.Response, error) {
resp, err := a.httpClient.Do(req)
if err != nil {
return nil, fmt.Errorf("error on request: %v", err)
}
if resp.StatusCode != http.StatusOK {
return resp, fmt.Errorf("%s returned HTTP status %d", req.URL, resp.StatusCode)
}
return resp, nil
}
func (a apiClient) createRequest(urlPath string) (*http.Request, error) {
req := a.request.Copy()
u, err := url.Parse(req.URL)
if err != nil {
return nil, err
}
u.Path = path.Join(u.Path, urlPath)
req.URL = u.String()
return web.NewHTTPRequest(req)
}
func closeBody(resp *http.Response) {
if resp != nil && resp.Body != nil {
_, _ = io.Copy(io.Discard, resp.Body)
_ = resp.Body.Close()
}
}
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