fix: support retryable http clients

Closes coop-cloud/organising#257.

pkg/web/client.go

@@ -0,0 +1,23 @@
+package web
+
+import (
+	"fmt"
+
+	"github.com/hashicorp/go-retryablehttp"
+	"github.com/sirupsen/logrus"
+)
+
+type customLeveledLogger struct {
+	retryablehttp.Logger
+}
+
+func (l customLeveledLogger) Printf(msg string, args ...interface{}) {
+	logrus.Debugf(fmt.Sprintf(msg, args...))
+}
+
+// NewHTTPRetryClient instantiates a new http client with retries baked in
+func NewHTTPRetryClient() *retryablehttp.Client {
+	retryClient := retryablehttp.NewClient()
+	retryClient.Logger = customLeveledLogger{}
+	return retryClient
+}

pkg/web/web.go

@@ -3,7 +3,6 @@ package web
 
 import (
 	"encoding/json"
-	"net/http"
 	"time"
 )
 
@@ -13,7 +12,7 @@ const Timeout = 10 * time.Second
 
 // ReadJSON reads JSON and parses it into your chosen interface pointer
 func ReadJSON(url string, target interface{}) error {
-	httpClient := &http.Client{Timeout: Timeout}
+	httpClient := NewHTTPRetryClient()
 	res, err := httpClient.Get(url)
 	if err != nil {
 		return err