GoogleChrome · Shubham-Rasal · Mar 6, 2023 · Mar 6, 2023 · Mar 8, 2023 · Mar 8, 2023
diff --git a/api-samples/downloads/download_links/manifest.json b/api-samples/downloads/download_links/manifest.json
@@ -0,0 +1,21 @@
+{
+  "name": "Download Selected Links",
+  "description": "Select links on a page and download them.",
+  "version": "0.3",
+  "minimum_chrome_version": "16.0.884",
+  "permissions": [
+    "downloads",
+    "activeTab",
+    "scripting"     
+  ],
+  "content_scripts":[
+    {
+      "matches": ["<all_urls>"],
+      "js": ["send_links.js"]      
+    }
+  ],
+  "action": {
+    "default_popup": "popup.html"
+  },
+  "manifest_version": 3
+}
diff --git a/api-samples/downloads/download_links/popup.html b/api-samples/downloads/download_links/popup.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<head>
+<script src='popup.js'></script>
+</head>
+<body>
+<input type=text id=filter placeholder=Filter>
+<input type=checkbox id=regex>
+<label for=regex>Regex</label><br>
+<button id=download0>Download All!</button>
+<table id=links>
+  <tr>
+    <th><input type=checkbox checked id=toggle_all></th>
+    <th align=left>URL</th>
+  </tr>
+</table>
+<button id=download1>Download All!</button>
+</body>
+</html>
diff --git a/api-samples/downloads/download_links/popup.js b/api-samples/downloads/download_links/popup.js
@@ -0,0 +1,122 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This extension demonstrates using chrome.downloads.download() to
+// download URLs.
+
+var allLinks = [];
+var visibleLinks = [];
+
+// Display all visible links.
+function showLinks() {
+  var linksTable = document.getElementById('links');
+  while (linksTable.children.length > 1) {
+    linksTable.removeChild(linksTable.children[linksTable.children.length - 1])
+  }
+  for (var i = 0; i < visibleLinks.length; ++i) {
+    var row = document.createElement('tr');
+    var col0 = document.createElement('td');
+    var col1 = document.createElement('td');
+    var checkbox = document.createElement('input');
+    checkbox.checked = true;
+    checkbox.type = 'checkbox';
+    checkbox.id = 'check' + i;
+    col0.appendChild(checkbox);
+    col1.innerText = visibleLinks[i];
+    col1.style.whiteSpace = 'nowrap';
+    col1.onclick = function() {
+      checkbox.checked = !checkbox.checked;
+    }
+    row.appendChild(col0);
+    row.appendChild(col1);
+    linksTable.appendChild(row);
+  }
+}
+
+// Toggle the checked state of all visible links.
+function toggleAll() {
+  var checked = document.getElementById('toggle_all').checked;
+  for (var i = 0; i < visibleLinks.length; ++i) {
+    document.getElementById('check' + i).checked = checked;
+  }
+}
+
+// Download all visible checked links.
+function downloadCheckedLinks() {
+  for (var i = 0; i < visibleLinks.length; ++i) {
+    if (document.getElementById('check' + i).checked) {
+      chrome.downloads.download({url: visibleLinks[i]},
+                                             function(id) {
+      });
+    }
+  }
+  window.close();
+}
+
+// Re-filter allLinks into visibleLinks and reshow visibleLinks.
+function filterLinks() {
+  var filterValue = document.getElementById('filter').value;
+  if (document.getElementById('regex').checked) {
+    visibleLinks = allLinks.filter(function(link) {
+      return link.match(filterValue);
+    });
+  } else {
+    var terms = filterValue.split(' ');
+    visibleLinks = allLinks.filter(function(link) {
+      for (var termI = 0; termI < terms.length; ++termI) {
+        var term = terms[termI];
+        if (term.length != 0) {
+          var expected = (term[0] != '-');
+          if (!expected) {
+            term = term.substr(1);
+            if (term.length == 0) {
+              continue;
+            }
+          }
+          var found = (-1 !== link.indexOf(term));
+          if (found != expected) {
+            return false;
+          }
+        }
+      }
+      return true;
+    });
+  }
+  showLinks();
+}
+
+// Add links to allLinks and visibleLinks, sort and show them.  send_links.js is
+// injected into all frames of the active tab, so this listener may be called
+// multiple times.
+chrome.runtime.onMessage.addListener(function(links) {
+  for (var index in links) {
+    allLinks.push(links[index]);
+  }
+  allLinks.sort();
+  visibleLinks = allLinks;
+  showLinks();
+});
+
+// Set up event handlers and inject send_links.js into all frames in the active
+// tab.
+window.onload = function() {
+  document.getElementById('filter').onkeyup = filterLinks;
+  document.getElementById('regex').onchange = filterLinks;
+  document.getElementById('toggle_all').onchange = toggleAll;
+  document.getElementById('download0').onclick = downloadCheckedLinks;
+  document.getElementById('download1').onclick = downloadCheckedLinks;
+
+  chrome.windows.getCurrent(function (currentWindow) {
+    chrome.tabs.query({active: true, windowId: currentWindow.id},
+                      function(activeTabs) {
+      chrome.scripting.executeScript(
+        {
+          target: {tabId: activeTabs[0].id},
+          files: ['send_links.js']
+
+        });
+
+      });
+  });
+};
diff --git a/api-samples/downloads/download_links/send_links.js b/api-samples/downloads/download_links/send_links.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Send back to the popup a sorted deduped list of valid link URLs on this page.
+// The popup injects this script into all frames in the active tab.
+
+var links = [].slice.apply(document.getElementsByTagName('a'));
+links = links.map(function(element) {
+  // Return an anchor's href attribute, stripping any URL fragment (hash '#').
+  // If the html specifies a relative path, chrome converts it to an absolute
+  // URL.
+  var href = element.href;
+  var hashIndex = href.indexOf('#');
+  if (hashIndex >= 0) {
+    href = href.substr(0, hashIndex);
+  }
+  return href;
+});
+
+links.sort();
+
+// Remove duplicates and invalid URLs.
+var kBadPrefix = 'javascript';
+for (var i = 0; i < links.length;) {
+  if (((i > 0) && (links[i] == links[i - 1])) ||
+      (links[i] == '') ||
+      (kBadPrefix == links[i].toLowerCase().substr(0, kBadPrefix.length))) {
+    links.splice(i, 1);
+  } else {
+    ++i;
+  }
+}
+
+console.log(links)
+
+//using runtime sendmessage to send the links to the popup
+chrome.runtime.sendMessage({
+  request : links,
+});