Magento 2.3 : Load new custom items into Shopping Cart when an button is clicked

[felix_schönher]

I added your code like this:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:App/etc/routes.xsd">
   <!--define id for frontend route is “standard”-->
   <router id="standard">
       <!--Route name-->
       <route id="Post" frontName="Post">
           <!--Module name-->
           <module name="MassiveArt_ShoppingCart" />
       </route>
   </router>
</config>

But I am not sure what i need to add in the orute id and frontName. 

This is the Code of the Controller if you need it:This is my file structure<?php

namespace MassiveArt\ShoppingCart\Controller\Index;
use Magento\Framework\App\Action\Action;
use Magento\Framework\App\Action\Context;
use Magento\Framework\Data\Form\FormKey;
use Magento\Framework\Controller\Result\JsonFactory;
use Magento\Checkout\Model\Cart;
use Magento\Catalog\Model\Product;
class Post extends Action
{
    protected $formKey;
    protected $cart;
    protected $product;
    public function __construct(
       Context $context,
	     JsonFactory $resultJsonFactory,
       FormKey $formKey,
       Cart $cart,
       Product $product) {
            $this->formKey = $formKey;
	           $this->resultJsonFactory = $resultJsonFactory;
            $this->cart = $cart;
            $this->product = $product;
            parent::__construct($context);
    }
    public function execute()
    {
	     $result = $this->resultJsonFactory->create();
       $productId = $this->getRequest()->getParam('productId');
       try {
		       $params = array(
                    'form_key' => $this->formKey->getFormKey(),
                    'product' => $productId,
                    'qty'   => 1
            );
        	  $product = $this->product->load($productId);
       		  $this->cart->addProduct($product, $params);
        	  $this->cart->save();
		        $result->setData(['message' => __("Product is added in cart")]);
            return $result;
       } catch(\Exception $e) {
		       $result->setData(['error' => __($e->getMessage())]);
		       return $result;
	     }
 }
}
 

[Sarvagya Pandey]

Please change Post as "post" (small letter) and change your button_getcart.phtml as

jQuery("#getCart").on("click", function(){
            jQuery.ajax({
                url:"http://192.168.10.106:8080/api/cart/",
                type:"GET", //First change type to method here
                headers: {
                  'X-Requested-With':  'XMLHttpRequest',
                  'Accept': '*/*',
                  'Cache-Control':'no-cache',
                },
                contentType: "application/json; charset=utf-8",
                data:
                {
                    "_customerID": 1, //for tests
                }
                success:function(response) {
			jQuery.ajax({
                		type: "post",
                		url: <?= $block->getUrl('post/index/post') ?>,
                		data: {
				        productId: response.Product_ID
				    }
                		success: function (data) {
					console.log(data);
                		}
            		});
                },
                error:function(){
                  alert("An Error occurred. Try again later");
                }
            });
          }
      });

Note: I hope you have created the folder in MassiveArt\ShoppingCart\Controller\Index folder. Hope this will work for you. If still you face any issue please let me know.

Regards

[felix_schönher]

I will test this tomorrow thank you very much

[felix_schönher]

Good Morning, I now tested if it works but it still has error 404 not found, if i try to get to the url, you posted [$block->getUrl('post/index/post'), which is http://localhost/post/index/post/ in my case, manually I also get the error 404.

[Sarvagya Pandey]

Good Morning,

Please try to use $block->getBaseUrl().'/post/index/post'

and then check the url you are getting by $block->getBaseUrl().'/post/index/post'

If still you face any issue, please let me know.

Regards

[felix_schönher]

Now I get this URL: http://localhost//post/index/post, but still I get the error 404

[felix_schönher]

[felix_schönher]

As I cant post a image, please follow this link: https://imgur.com/a/XkfgJU8

[Sarvagya Pandey]

This is fine but you are not getting you magento website base url try to pass it as static value and then check eg: "http://localhost/magento"."/post/index/post"

[felix_schönher]

My base URL is localhost, the two links, you sended didn't work. I tried: http://localhost/magento/post/index/post as well as http://localhost/post/index/post