refactor: remove utils pkg

BREAKING CHANGE: utils package has been removed in favor of specific new
packages (http, crypto, strings)

pkg/utils/http.go

@@ -1,107 +0,0 @@
-package utils
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"io/ioutil"
-	"log"
-	"net/http"
-	"net/url"
-	"strings"
-	"time"
-)
-
-var (
-	DefaultHTTPClient = &http.Client{
-		Timeout: time.Duration(30 * time.Second),
-	}
-)
-
-type Decoder interface {
-	Decode(dst interface{}, src map[string][]string) error
-}
-type Encoder interface {
-	Encode(src interface{}, dst map[string][]string) error
-}
-
-type FormAuthorization func(url.Values)
-type RequestAuthorization func(*http.Request)
-
-func AuthorizeBasic(user, password string) RequestAuthorization {
-	return func(req *http.Request) {
-		req.SetBasicAuth(url.QueryEscape(user), url.QueryEscape(password))
-	}
-}
-
-func FormRequest(endpoint string, request interface{}, encoder Encoder, authFn interface{}) (*http.Request, error) {
-	form := url.Values{}
-	if err := encoder.Encode(request, form); err != nil {
-		return nil, err
-	}
-	if fn, ok := authFn.(FormAuthorization); ok {
-		fn(form)
-	}
-	body := strings.NewReader(form.Encode())
-	req, err := http.NewRequest("POST", endpoint, body)
-	if err != nil {
-		return nil, err
-	}
-	if fn, ok := authFn.(RequestAuthorization); ok {
-		fn(req)
-	}
-	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
-	return req, nil
-}
-
-func HttpRequest(client *http.Client, req *http.Request, response interface{}) error {
-	resp, err := client.Do(req)
-	if err != nil {
-		return err
-	}
-	defer resp.Body.Close()
-
-	body, err := ioutil.ReadAll(resp.Body)
-	if err != nil {
-		return fmt.Errorf("unable to read response body: %v", err)
-	}
-
-	if resp.StatusCode != http.StatusOK {
-		return fmt.Errorf("http status not ok: %s %s", resp.Status, body)
-	}
-
-	err = json.Unmarshal(body, response)
-	if err != nil {
-		return fmt.Errorf("failed to unmarshal response: %v %s", err, body)
-	}
-	return nil
-}
-
-func URLEncodeResponse(resp interface{}, encoder Encoder) (string, error) {
-	values := make(map[string][]string)
-	err := encoder.Encode(resp, values)
-	if err != nil {
-		return "", err
-	}
-	v := url.Values(values)
-	return v.Encode(), nil
-}
-
-func StartServer(ctx context.Context, port string) {
-	server := &http.Server{Addr: port}
-	go func() {
-		if err := server.ListenAndServe(); err != http.ErrServerClosed {
-			log.Fatalf("ListenAndServe(): %v", err)
-		}
-	}()
-
-	go func() {
-		<-ctx.Done()
-		ctxShutdown, cancelShutdown := context.WithTimeout(context.Background(), 5*time.Second)
-		defer cancelShutdown()
-		err := server.Shutdown(ctxShutdown)
-		if err != nil {
-			log.Fatalf("Shutdown(): %v", err)
-		}
-	}()
-}