all: use http package to replace http method names (#26535)

p2p/simulations/http.go

@@ -102,7 +102,7 @@ type SubscribeOpts struct {
 // nodes and connections and filtering message events
 func (c *Client) SubscribeNetwork(events chan *Event, opts SubscribeOpts) (event.Subscription, error) {
 	url := fmt.Sprintf("%s/events?current=%t&filter=%s", c.URL, opts.Current, opts.Filter)
-	req, err := http.NewRequest("GET", url, nil)
+	req, err := http.NewRequest(http.MethodGet, url, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -215,18 +215,18 @@ func (c *Client) RPCClient(ctx context.Context, nodeID string) (*rpc.Client, err
 // Get performs a HTTP GET request decoding the resulting JSON response
 // into "out"
 func (c *Client) Get(path string, out interface{}) error {
-	return c.Send("GET", path, nil, out)
+	return c.Send(http.MethodGet, path, nil, out)
 }
 
 // Post performs a HTTP POST request sending "in" as the JSON body and
 // decoding the resulting JSON response into "out"
 func (c *Client) Post(path string, in, out interface{}) error {
-	return c.Send("POST", path, in, out)
+	return c.Send(http.MethodPost, path, in, out)
 }
 
 // Delete performs a HTTP DELETE request
 func (c *Client) Delete(path string) error {
-	return c.Send("DELETE", path, nil, nil)
+	return c.Send(http.MethodDelete, path, nil, nil)
 }
 
 // Send performs a HTTP request, sending "in" as the JSON request body and