如何定位Magento网站首页重复请求的发起代码？

Hey Shahriar, let's break down how to track down that unnecessary second homepage request—since disabling JavaScript didn’t eliminate it, the issue might not be a direct JS trigger, even though Chrome points to the Amasty configurableList.js file. Here's a step-by-step approach to find the root cause:

1. Verify Chrome's Initiator Context #

Chrome's "Initiator" field can sometimes be misleading—it might link to a file that loaded a resource which indirectly triggered the request, not the code that directly sent it. For example:

• Check if the configurableList.js loads a CSS file that contains a malformed background-image or @import rule pointing to your homepage (e.g., background-image: url('/')).
• Look for dynamic elements created by the JS (like <img>, <iframe>, or <link> tags) that might have a blank or incorrect src/href attribute—browsers often resolve empty URLs to the current page.

2. Deep Dive into the Amasty JS File #

Even if you didn’t spot the request code at first, search the configurableList.js file for common request triggers:

• Search for keywords like fetch, XMLHttpRequest, $.ajax (if jQuery is used), location.href, window.open, or document.createElement (for dynamic elements).
• Amasty’s configurable list JS might interact with product data—check for logic that tries to load a fallback resource or redirect, which could accidentally target the homepage.
• Use Chrome DevTools’ debugger: Add a breakpoint at the start of configurableList.js, reload the page, and step through the code to see if any line initiates a network request.

3. Isolate the Amasty JS File #

Confirm if the request is truly tied to this file by temporarily disabling it:

• In your Magento admin, navigate to the Amasty Configurable Products List settings and disable the module (or just the JS loading) temporarily.
• Alternatively, edit your theme’s local.xml to remove the reference to amasty/amconf/configurableList.js.
• Reload the homepage and check if the duplicate request disappears. If it does, you know the issue is linked to this module—even if the direct trigger is in a dependency or callback function it uses.

4. Rule Out Server-Side or HTML Triggers #

Since disabling JS didn’t stop the request, check for non-JS causes:

• Server logs: Look at your Apache/Nginx access logs to compare the two requests—check for differences in User-Agent, request headers, or query parameters. This could reveal if one request is a browser prefetch, crawler, or internal server-side call.
• HTML source: Search your homepage’s raw HTML for elements like <iframe src="/">, <img src="">, or <link rel="prefetch" href="/">—these can trigger accidental homepage requests.
• Magento server-side code: Check if any custom modules or template files use file_get_contents, curl, or Magento’s HTTP Client to request the homepage internally during page load.

5. Check for Browser Preloading Features #

Some browsers (like Chrome) have preloading/prefetching features that might trigger extra requests. To rule this out:

• Disable Chrome’s "Predict network actions to improve page load performance" setting (under Settings > Privacy and security > Cookies and other site data).
• Test the page in incognito mode to eliminate extensions or cached settings that might be causing the duplicate request.

Once you narrow down the trigger, you can adjust the code (fix the malformed resource URL, remove the accidental request logic, or disable the unnecessary prefetch) to eliminate the duplicate homepage hit.

内容的提问来源于stack exchange，提问作者Shahriar Shojib