fix for 502 server errors

composer.json

@@ -19,7 +19,7 @@
     "woocommerce/woocommerce-sniffs": "^0.1.3",
     "wp-coding-standards/wpcs": "2.3.0",
     "wp-phpunit/wp-phpunit": "6.1.1",
-    "yoast/phpunit-polyfills": "^1.0.4"
+    "yoast/phpunit-polyfills": "^1.0.5"
   },
   "require": {
     "php": ">=7.2.0",

includes/API/Product_Variations.php

@@ -8,6 +8,7 @@
 use WP_REST_Request;
 use WP_REST_Response;
 use WC_Product_Query;
+use WCPOS\WooCommercePOS\Logger;
 
 class Product_Variations {
 	private $request;
@@ -52,6 +53,25 @@ public function product_response( WP_REST_Response $response, WC_Data $product,
 		$barcode_field = woocommerce_pos_get_settings( 'general', 'barcode_field' );
 		$data['barcode'] = $product->get_meta( $barcode_field );
 
+		/**
+		 * Truncate the product description
+		 */
+		$max_length = 100;
+		$plain_text_description = wp_strip_all_tags( $data['description'], true );
+		if ( strlen( $plain_text_description ) > $max_length ) {
+			$truncated_description = substr( $plain_text_description, 0, $max_length - 3 ) . '...';
+			$data['description'] = $truncated_description;
+		}
+
+		/**
+		 * Check the response size and log a debug message if it is over the maximum size.
+		 */
+		$response_size = strlen( serialize( $response->data ) );
+		$max_response_size = 10000;
+		if ( $response_size > $max_response_size ) {
+			Logger::log( "Variation ID {$product->get_id()} has a response size of {$response_size} bytes, exceeding the limit of {$max_response_size} bytes." );
+		}
+
 		/**
 		 * Reset the new response data
 		 */

includes/API/Products.php

@@ -4,6 +4,7 @@
 
 use Ramsey\Uuid\Uuid;
 use WC_Data;
+use WCPOS\WooCommercePOS\Logger;
 use WP_Query;
 use WP_REST_Request;
 use WP_REST_Response;
@@ -86,6 +87,25 @@ public function product_response( WP_REST_Response $response, WC_Data $product,
 		$barcode_field = woocommerce_pos_get_settings( 'general', 'barcode_field' );
 		$data['barcode'] = $product->get_meta( $barcode_field );
 
+		/**
+		 * Truncate the product description
+		 */
+		$max_length = 100;
+		$plain_text_description = wp_strip_all_tags( $data['description'], true );
+		if ( strlen( $plain_text_description ) > $max_length ) {
+			$truncated_description = substr( $plain_text_description, 0, $max_length - 3 ) . '...';
+			$data['description'] = $truncated_description;
+		}
+
+		/**
+		 * Check the response size and log a debug message if it is over the maximum size.
+		 */
+		$response_size = strlen( serialize( $response->data ) );
+		$max_response_size = 10000;
+		if ( $response_size > $max_response_size ) {
+			Logger::log( "Product ID {$product->get_id()} has a response size of {$response_size} bytes, exceeding the limit of {$max_response_size} bytes." );
+		}
+
 		/**
 		 * Reset the new response data
 		 */

includes/Init.php

@@ -36,6 +36,8 @@ public function __construct() {
 
 		// Hack - remove when possible
 		add_filter( 'woocommerce_rest_shop_order_schema', array( $this, 'shop_order_schema' ), 10, 1 );
+		add_filter( 'option_wpseo', array( $this, 'remove_wpseo_rest_api_links' ), 10, 1 );
+
 	}
 
 	/**
@@ -149,4 +151,18 @@ private function integrations(): void {
 		//          new Integrations\Bookings();
 		//      }
 	}
+
+	/**
+	 * Yoast SEO adds SEO to the WC REST API by default, this adds to the download weight and can cause problems
+	 * It is programmatically turned off here for POS requests
+	 * This gets loaded and cached before the rest_api init hook, so we can't use the filter
+	 */
+	public function remove_wpseo_rest_api_links ( $wpseo_options ) {
+		if ( woocommerce_pos_request() ) {
+			$wpseo_options['remove_rest_api_links'] = true;
+			$wpseo_options['enable_headless_rest_endpoints'] = false;
+			return $wpseo_options;
+		}
+		return $wpseo_options;
+	}
 }

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@wcpos/woocommerce-pos",
-	"version": "1.0.0",
+	"version": "1.0.1",
 	"description": "A simple front-end for taking WooCommerce orders at the Point of Sale.",
 	"main": "index.js",
 	"workspaces": {

readme.txt

@@ -3,7 +3,7 @@ Contributors: kilbot
 Tags: cart, e-commerce, ecommerce, inventory, point-of-sale, pos, sales, sell, shop, shopify, store, vend, woocommerce, wordpress-ecommerce
 Requires at least: 5.6 & WooCommerce 5.3
 Tested up to: 6.2
-Stable tag: 1.0.0
+Stable tag: 1.0.1
 License: GPL-3.0
 License URI: http://www.gnu.org/licenses/gpl-3.0.html
 
@@ -63,7 +63,14 @@ There is more information on our website at [https://wcpos.com](https://wcpos.co
 
 == Changelog ==
 
-= 1.0.0 =
+= 1.0.1 = 2023/05/05
+* Fix: Product and Variations not showing in POS
+  Description: The WC REST API response can be too large in some cases causing a 502 server error.
+  - Product and Variation descriptions are not truncated to 100 characters for the POS to reduce response size.
+  - Yoast SEO is now programmatically disabled for the POS to reduce response size.
+  - A message is now logged when the WC REST API product or variation response is too large.
+
+= 1.0.0 = 2023/05/03
 * Complete rewrite of the plugin with improved functionality and performance.
 * Although extensive testing has been done, there may still be bugs.
 * We recommend updating only when you have time to deal with potential issues.