Products exports and imports for magento automatic solution - repost

[login to view URL] program to importe products to Magento from vendor site should be able to export products from vendor site. (Vendor site products exported in the category url or category units.) We have a lot of vendors.Most vendors do not want to provide this information(server, API. [login to view URL] file). Therefore, Without providing their information products must be exported. So, we recommend scraping technology. There are two ways to web scraping. [login to view URL] analysis for web scraping is completely automated.(First, Selected as the developer of this technology ) [login to view URL] analysis for web scraping should be analyzed per vendor site. Number 2 should be low cost analysis per vendor site.  2. Out of stocks management from vendor site. Products imported to Magento should be upgraded to match out of stocks content between Magento and vendors site to the real-time The product description, images, price, attributes, etc. will remain the same.(Product information should not be upgraded.) But Out of stock only should be upgraded from the vendor site. Out of stock is colors, size, quantity,type. (Import and export of the products should be downloaded and upload as a CSV file) 3. Automatic Login and buy from vendor site. Vendor sites must be able to login ((Username and password saved) automatically. Products purchased in Magento should be able to fill in vendor's site shopping cart automatically. Magento administrator must be able to verify the shopping results of vendor site Magento administrator manually have to pay the vendor's site shopping cart . If out of stock, Magento administrator or Automatic Module sends an email notifying out of stock and refund to the buyer. In order to complete our projects Various techniques are required. It is the ability of the developer. Otherwise, this project is not recommended. Work is divided into three parts.