48 lines
870 B
Go
48 lines
870 B
Go
package healthcheck
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"net/http"
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)
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var (
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ErrHTTPStatusNotOK = errors.New("HTTP response status is not OK")
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)
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type Checker interface {
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Check(ctx context.Context, url string) error
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}
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type checker struct {
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httpClient *http.Client
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}
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func NewChecker(httpClient *http.Client) Checker {
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return &checker{
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httpClient: httpClient,
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}
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}
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func (h *checker) Check(ctx context.Context, url string) error {
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request, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
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if err != nil {
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return err
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}
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response, err := h.httpClient.Do(request)
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if err != nil {
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return err
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}
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defer response.Body.Close()
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if response.StatusCode == http.StatusOK {
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return nil
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}
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b, err := io.ReadAll(response.Body)
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if err != nil {
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return err
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}
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return fmt.Errorf("%w: %s: %s", ErrHTTPStatusNotOK, response.Status, string(b))
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}
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