CDN URLs are not properly encoded in some edge cases
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #1719568. -->
Reported by: [cedarm](https://www.drupal.org/user/319409)
>>>
<p>This is a followup to <span class="drupalorg-gitlab-issue-link drupalorg-gitlab-link-wrapper"><a href="https://git.drupalcode.org/project/cdn/-/work_items/1431284" class="drupalorg-gitlab-link">https://git.drupalcode.org/project/cdn/-/work_items/1431284</a></span>. We have creatively named files also, but for test cases I uploaded two files named "IMG 0419.JPG" and "Copy of t: 100% in B&W.jpg".</p>
<p>With Far Future enabled the filename with the space works fine, while the & breaks the Far Future token because ultimately <code>$path != urldecode(drupal_urlencode($path))</code>. The generated token uses "Copy of t: 100% in B%26W.jpg" while cdn_basic_farfuture_download() gets the proper filename. This can be fixed by storing the original $path (before it's decoded, drupal encoded, and decoded again) and using the original $path value for pathinfo().</p>
<p>Without Far Future the filename is not encoded at all, so depending on the client and particular characters it sometimes works and sometimes breaks. The % results in a 400 Bad Request because the requested filename is "Copy%20of%20t:%20100%%20in%20B&W.jpg".</p>
<p>He're my thinking on fixing this: file_create_url() doesn't use url() on paths altered by the CDN module, so shouldn't we do the same encoding as url() does whenever we alter the path, and also ONLY when we alter it? From url():</p>
<pre> $path = drupal_urlencode($prefix . $path);</pre><p>So why don't we use drupal_urlencode() in cdn_basic_get_servers(), and not in the Far Future part of cdn_file_url_alter()?</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br> </span><span style="color: #007700">foreach (</span><span style="color: #0000BB">$mapping</span><span style="color: #007700">[</span><span style="color: #0000BB">$key</span><span style="color: #007700">] as </span><span style="color: #0000BB">$cdn_url</span><span style="color: #007700">) {<br> </span><span style="color: #0000BB">$servers</span><span style="color: #007700">[] = array(<br> </span><span style="color: #DD0000">'server' </span><span style="color: #007700">=> </span><span style="color: #0000BB">$cdn_url</span><span style="color: #007700">,<br> </span><span style="color: #DD0000">'url' </span><span style="color: #007700">=> </span><span style="color: #0000BB">$cdn_url </span><span style="color: #007700">. </span><span style="color: #0000BB">$base_path </span><span style="color: #007700">. </span><span style="color: #0000BB">drupal_urlencode</span><span style="color: #007700">(</span><span style="color: #0000BB">$path</span><span style="color: #007700">),<br> );<br> }<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>I have only been considering basic (origin pull) mode in this suggestion, but it does fix our issue. There are likely other places that need to be modified too.</p>
issue
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