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http_client.go
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http_client.go
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package utils
import (
"bytes"
"context"
"fmt"
"io/ioutil"
"net/http"
"strings"
log "github.com/sirupsen/logrus"
)
type HTTPClientInterface interface {
Get(ctx context.Context, url string) ([]byte, error)
Post(ctx context.Context, url string, requestBody []byte) ([]byte, error)
Do(req *http.Request) (*http.Response, error)
}
type HTTPClient struct {
httpClient *http.Client
apiKey string
}
func NewHTTPClient(apiKey string) HTTPClientInterface {
return &HTTPClient{
httpClient: &http.Client{},
apiKey: apiKey,
}
}
func (c *HTTPClient) Get(ctx context.Context, url string) ([]byte, error) {
req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
if err != nil {
log.WithFields(log.Fields{
"url": url,
"error": err.Error(),
}).Debug("HTTPClient: error creating new GET request")
return nil, err
}
resp, err := c.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
data, _ := ioutil.ReadAll(resp.Body)
return data, nil
}
func (c *HTTPClient) Post(ctx context.Context, url string, requestBody []byte) ([]byte, error) {
rBody := bytes.NewBuffer(requestBody)
req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, rBody)
if err != nil {
log.WithFields(log.Fields{
"url": url,
"error": err.Error(),
}).Debug("HTTPClient: error creating new POST request")
return nil, err
}
req.Header.Set("Content-Type", "application/json")
if c.apiKey != "" {
req.Header.Set("Api-Key", c.apiKey)
}
resp, err := c.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
return ioutil.ReadAll(resp.Body)
}
func (c *HTTPClient) Do(req *http.Request) (*http.Response, error) {
resp, err := c.httpClient.Do(req)
if err != nil {
if strings.Contains(err.Error(), "context canceled") {
return resp, err
}
}
respStatusCode := getResponseCodeString(resp)
if err != nil || !isResponseSuccess(resp) {
log.WithFields(log.Fields{
"method": req.Method,
"statusCode": respStatusCode,
"url": req.URL.String(),
"error": err,
}).Debug("HTTPClient: error performing request")
}
if !isResponseSuccess(resp) {
err = fmt.Errorf("error performing %s request to %s: %s", req.Method, req.URL.String(), respStatusCode)
}
return resp, err
}
func getResponseCodeString(resp *http.Response) string {
if resp == nil {
return ""
}
return fmt.Sprintf("%d", resp.StatusCode)
}
// Ensures the response status code falls within the
// status codes that are commonly considered successful.
func isResponseSuccess(resp *http.Response) bool {
if resp == nil {
return false
}
statusCode := resp.StatusCode
return statusCode >= http.StatusOK && statusCode <= 299
}