MalformedUriException Unable to parse URI: https:///custom_apps/mail/img/blocked-image.png

[0-wHiTeHand-0]

Steps to reproduce

Just open an email, but it does not occur with all of them. This error does not cause any problem for reading emails, but some component is adding an additional slash to the URL, which should not happen. Checked on two different NC instances I have.

Expected behavior

The browser makes a requests to:
/apps/mail/proxy?src=https%3A%2F%2Fcustom_apps%2Fmail%2Fimg%2Fblocked-image.png&requesttoken=<TOKEN>
(note the 2 %2F (slash) after the 'https' -> not malformed url)

Actual behavior

The browser makes requests to:
/apps/mail/proxy?src=https%3A%2F%2F%2Fcustom_apps%2Fmail%2Fimg%2Fblocked-image.png&requesttoken=<TOKEN>
(note the 3 %2F (slash) after the 'https' -> malformed url)

Mail app version

4.1.1

Nextcloud version

30.0.4 - aio

Mailserver or service

hostinger

Operating system

Linux

PHP engine version

PHP 8.2

Nextcloud memory caching

local -> APCu , distributed -> Redis

Web server

Nginx

Database

PostgreSQL

Additional info

Here's the complete trace:

MalformedUriException Unable to parse URI: https:///custom_apps/mail/img/blocked-image.png
Raw log entry

{
  "reqId": "________",
  "level": 3,
  "time": "2024-12-20T11:41:02+00:00",
  "remoteAddr": "________",
  "user": "________",
  "app": "index",
  "method": "GET",
  "url": "/apps/mail/proxy?src=https%3A%2F%2F%2Fcustom_apps%2Fmail%2Fimg%2Fblocked-image.png&requesttoken=________",
  "message": "Unable to parse URI: https:///custom_apps/mail/img/blocked-image.png",
  "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:133.0) Gecko/20100101 Firefox/133.0",
  "version": "30.0.4.1",
  "exception": {
    "Exception": "GuzzleHttp\\Psr7\\Exception\\MalformedUriException",
    "Message": "Unable to parse URI: https:///custom_apps/mail/img/blocked-image.png",
    "Code": 0,
    "Trace": [
      {
        "file": "/var/www/html/3rdparty/guzzlehttp/psr7/src/Utils.php",
        "line": 472,
        "function": "__construct",
        "class": "GuzzleHttp\\Psr7\\Uri",
        "type": "->",
        "args": [
          "*** sensitive parameters replaced ***"
        ]
      },
      {
        "file": "/var/www/html/3rdparty/guzzlehttp/guzzle/src/Client.php",
        "line": 161,
        "function": "uriFor",
        "class": "GuzzleHttp\\Psr7\\Utils",
        "type": "::",
        "args": [
          "*** sensitive parameters replaced ***"
        ]
      },
      {
        "file": "/var/www/html/3rdparty/guzzlehttp/guzzle/src/Client.php",
        "line": 189,
        "function": "requestAsync",
        "class": "GuzzleHttp\\Client",
        "type": "->",
        "args": [
          "*** sensitive parameters replaced ***"
        ]
      },
      {
        "file": "/var/www/html/lib/private/Http/Client/Client.php",
        "line": 205,
        "function": "request",
        "class": "GuzzleHttp\\Client",
        "type": "->",
        "args": [
          "*** sensitive parameters replaced ***",
          "*** sensitive parameters replaced ***",
          {
            "verify": "/var/www/html/resources/config/ca-bundle.crt",
            "timeout": 30,
            "nextcloud": {
              "allow_local_address": true
            },
            "headers": {
              "User-Agent": "Nextcloud Server Crawler",
              "Accept-Encoding": "gzip"
            },
            "synchronous": true
          }
        ]
      },
      {
        "file": "/var/www/html/custom_apps/mail/lib/Controller/ProxyController.php",
        "line": 106,
        "function": "get",
        "class": "OC\\Http\\Client\\Client",
        "type": "->",
        "args": [
          "*** sensitive parameters replaced ***"
        ]
      },
      {
        "file": "/var/www/html/lib/private/AppFramework/Http/Dispatcher.php",
        "line": 208,
        "function": "proxy",
        "class": "OCA\\Mail\\Controller\\ProxyController",
        "type": "->",
        "args": [
          "*** sensitive parameters replaced ***"
        ]
      },
      {
        "file": "/var/www/html/lib/private/AppFramework/Http/Dispatcher.php",
        "line": 114,
        "function": "executeController",
        "class": "OC\\AppFramework\\Http\\Dispatcher",
        "type": "->",
        "args": [
          {
            "__class__": "OCA\\Mail\\Controller\\ProxyController"
          },
          "proxy"
        ]
      },
      {
        "file": "/var/www/html/lib/private/AppFramework/App.php",
        "line": 161,
        "function": "dispatch",
        "class": "OC\\AppFramework\\Http\\Dispatcher",
        "type": "->",
        "args": [
          {
            "__class__": "OCA\\Mail\\Controller\\ProxyController"
          },
          "proxy"
        ]
      },
      {
        "file": "/var/www/html/lib/private/Route/Router.php",
        "line": 302,
        "function": "main",
        "class": "OC\\AppFramework\\App",
        "type": "::",
        "args": [
          "OCA\\Mail\\Controller\\ProxyController",
          "proxy",
          {
            "__class__": "OC\\AppFramework\\DependencyInjection\\DIContainer"
          },
          {
            "_route": "mail.proxy.proxy"
          }
        ]
      },
      {
        "file": "/var/www/html/lib/base.php",
        "line": 1003,
        "function": "match",
        "class": "OC\\Route\\Router",
        "type": "->",
        "args": [
          "/apps/mail/proxy"
        ]
      },
      {
        "file": "/var/www/html/index.php",
        "line": 24,
        "function": "handleRequest",
        "class": "OC",
        "type": "::",
        "args": []
      }
    ],
    "File": "/var/www/html/3rdparty/guzzlehttp/psr7/src/Uri.php",
    "Line": 85,
    "message": "Unable to parse URI: https:///custom_apps/mail/img/blocked-image.png",
    "exception": [],
    "CustomMessage": "Unable to parse URI: https:///custom_apps/mail/img/blocked-image.png"
  },
  "id": "________"
}