refactor(http): implement shared transport and clients (#1288)

* fix(http): flip to a shared transport and clients

* nice threads

* that is terrible

* fake uri for magnet

* lazy locking

* why bother with r's

* flip magic params to struct

* refactor(http-clients): use separate clients with shared transport

* refactor(http-clients): add missing license header

* refactor(http-clients): defer and fix errors

---------

Co-authored-by: ze0s <ze0s@riseup.net>

pkg/version/version.go

@@ -12,6 +12,7 @@ import (
 	"time"
 
 	"github.com/autobrr/autobrr/pkg/errors"
+	"github.com/autobrr/autobrr/pkg/sharedhttp"
 
 	goversion "github.com/hashicorp/go-version"
 )
@@ -72,6 +73,8 @@ type Checker struct {
 	Owner          string
 	Repo           string
 	CurrentVersion string
+
+	httpClient *http.Client
 }
 
 func NewChecker(owner, repo, currentVersion string) *Checker {
@@ -79,6 +82,10 @@ func NewChecker(owner, repo, currentVersion string) *Checker {
 		Owner:          owner,
 		Repo:           repo,
 		CurrentVersion: currentVersion,
+		httpClient: &http.Client{
+			Timeout:   time.Second * 30,
+			Transport: sharedhttp.Transport,
+		},
 	}
 }
 
@@ -93,12 +100,11 @@ func (c *Checker) get(ctx context.Context) (*Release, error) {
 	req.Header.Set("Accept", "application/vnd.github.v3+json")
 	req.Header.Set("User-Agent", c.buildUserAgent())
 
-	client := http.DefaultClient
-
-	resp, err := client.Do(req)
+	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		return nil, err
 	}
+
 	defer resp.Body.Close()
 
 	if resp.StatusCode != http.StatusOK {