如何用AppleScript/Shell脚本批量下载指定类名图片并按源URL命名

Hey there! I see you've got a start with your AppleScript, but you're missing the key parts for scraping the target images and handling downloads. Let's fix that up—here's a complete, working script that does exactly what you need, plus handles edge cases like invalid filenames and missing images.

Full Working Script #

-- Set up the base download folder (same directory as the script)
tell application "Finder"
    set scriptContainer to container of (path to me) as text
    set downloadFolder to scriptContainer & "Scraped Images:"
    -- Create the folder if it doesn't exist
    if not (exists folder downloadFolder) then
        make new folder at scriptContainer with properties {name:"Scraped Images"}
    end if
end tell

-- Your list of target URLs
set AllUrls to {"https://teespri...", "https://example.com/another-page"}

-- Loop through each URL in the list
repeat with currentUrl in AllUrls
    try
        -- Clean up the URL to use as a valid filename (replace forbidden characters)
        set safeFilename to my cleanFilename(currentUrl)
        set imagePath to downloadFolder & safeFilename & ".jpg" -- Adjust extension if your images use .png etc.
        
        -- Use Safari to load the page and extract the image's src via JavaScript
        tell application "Safari"
            activate
            -- Open the URL in a new tab
            set newTab to make new tab at end of tabs of window 1
            set URL of newTab to currentUrl
            
            -- Wait for the page to fully load (adjust delay if needed for slow pages)
            repeat while (do JavaScript "document.readyState" in newTab) is not "complete"
                delay 1
            end repeat
            
            -- Execute JS to grab the target image's src attribute
            set imageSrc to do JavaScript "document.querySelector('.image_stack__image.js-default-img').src" in newTab
            
            -- Close the tab to keep things tidy
            close newTab
        end tell
        
        -- Download the image using curl (more reliable than AppleScript's native methods)
        set curlCommand to "curl -o " & quoted form of POSIX path of imagePath & " " & quoted form of imageSrc
        do shell script curlCommand
        
        log "Successfully downloaded image from: " & currentUrl
        
    on error errMsg
        log "Failed to process " & currentUrl & ": " & errMsg
    end try
end repeat

-- Helper function to convert URLs into valid filenames
on cleanFilename(rawUrl)
    set invalidChars to {":", "/", "\\", "?", "%", "*", "|", "\"", "<", ">"}
    set cleanedUrl to rawUrl
    repeat with char in invalidChars
        set cleanedUrl to my replaceText(cleanedUrl, char, "-")
    end repeat
    -- Trim long URLs to avoid filename length limits
    if length of cleanedUrl > 100 then
        set cleanedUrl to text 1 thru 100 of cleanedUrl & "..."
    end if
    return cleanedUrl
end cleanFilename

-- Helper function to replace text in strings
on replaceText(inputText, findText, replaceText)
    set AppleScript's text item delimiters to findText
    set textItems to text items of inputText
    set AppleScript's text item delimiters to replaceText
    set outputText to textItems as string
    set AppleScript's text item delimiters to ""
    return outputText
end replaceText

Key Details Explained #

• Folder Auto-Creation: The script makes a "Scraped Images" folder in the same directory as your script if it doesn't already exist, so you don't have to set paths manually.
• Filename Safety: URLs contain characters that aren't allowed in filenames (like / or :), so the cleanFilename function replaces those with - and trims long URLs to avoid system errors.
• Reliable DOM Parsing: Using Safari's JavaScript execution is way more accurate than regex for scraping HTML—document.querySelector directly targets the exact image class you specified.
• Curl for Downloads: curl handles redirects, different image types, and network quirks better than AppleScript's built-in download commands.
• Error Handling: The try/on error block catches issues like failed page loads, missing images, or download errors, and logs them so you can debug easily.

Alternative: Headless Scraping (No Safari Window) #

If you don't want Safari to pop up during scraping, you can use JavaScript for Automation (JXA) instead, or pair curl with a lightweight HTML parser like pup (you'd need to install pup via Homebrew first). But the script above is self-contained and works without extra tools.

内容的提问来源于stack exchange，提问作者GTO