105 lines
2.6 KiB
Go
105 lines
2.6 KiB
Go
package caddy
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"time"
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)
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// Test hook for json marshalling to allow simulating failures in tests
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var jsonMarshalClient = json.Marshal
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// Client wraps the Caddy admin API.
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type Client struct {
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baseURL string
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httpClient *http.Client
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}
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// NewClient creates a Caddy API client.
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func NewClient(adminAPIURL string) *Client {
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return &Client{
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baseURL: adminAPIURL,
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httpClient: &http.Client{
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Timeout: 30 * time.Second,
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},
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}
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}
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// Load atomically replaces Caddy's entire configuration.
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// This is the primary method for applying configuration changes.
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func (c *Client) Load(ctx context.Context, config *Config) error {
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body, err := jsonMarshalClient(config)
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if err != nil {
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return fmt.Errorf("marshal config: %w", err)
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}
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, c.baseURL+"/load", bytes.NewReader(body))
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if err != nil {
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return fmt.Errorf("create request: %w", err)
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}
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req.Header.Set("Content-Type", "application/json")
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resp, err := c.httpClient.Do(req)
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if err != nil {
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return fmt.Errorf("execute request: %w", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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bodyBytes, _ := io.ReadAll(resp.Body)
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return fmt.Errorf("caddy returned status %d: %s", resp.StatusCode, string(bodyBytes))
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}
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return nil
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}
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// GetConfig retrieves the current running configuration from Caddy.
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func (c *Client) GetConfig(ctx context.Context) (*Config, error) {
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, c.baseURL+"/config/", nil)
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if err != nil {
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return nil, fmt.Errorf("create request: %w", err)
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}
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resp, err := c.httpClient.Do(req)
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if err != nil {
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return nil, fmt.Errorf("execute request: %w", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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bodyBytes, _ := io.ReadAll(resp.Body)
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return nil, fmt.Errorf("caddy returned status %d: %s", resp.StatusCode, string(bodyBytes))
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}
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var config Config
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if err := json.NewDecoder(resp.Body).Decode(&config); err != nil {
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return nil, fmt.Errorf("decode response: %w", err)
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}
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return &config, nil
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}
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// Ping checks if Caddy admin API is reachable.
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func (c *Client) Ping(ctx context.Context) error {
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, c.baseURL+"/config/", nil)
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if err != nil {
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return fmt.Errorf("create request: %w", err)
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}
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resp, err := c.httpClient.Do(req)
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if err != nil {
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return fmt.Errorf("caddy unreachable: %w", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("caddy returned status %d", resp.StatusCode)
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}
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return nil
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}
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