# How to receive images and files from a user

This section explains how to detect when a user sends a file, obtain its link, and how to work with it correctly.

To identify when a user has sent an attachment (such as an image, file, video, or audio), you must use the trigger condition:

`attachment_message`

<div data-with-frame="true"><figure><img src="/files/BmGvCrGaTNx180PNCc8q" alt=""><figcaption></figcaption></figure></div>

After a user sends a file, the following system variables are generated:

* `#{attachments}`: Contains the URLs of all attachments from the user's message, formatted as a JSON array. Use this when you need to process multiple files or handle the data structure programmatically.
* `#{attachment_url}`: Contains a direct, plain-text URL to the first (or only) attachment. This is the most convenient variable for immediate use, such as displaying the link in a message or passing it to another function.

To understand the practical difference, you can display both variables in a bot message. The `#{attachments}` variable will show a structured JSON array, while `#{attachment_url}` will show a simple, clickable URL.

<div data-with-frame="true"><figure><img src="/files/5WBM5BQYpDaFIVQzPLN7" alt=""><figcaption></figcaption></figure></div>

If your project handles multiple user attachments, it is efficient to assign each attachment URL to a dedicated variable.

To do this, declare a new variable in the block editor's **Calculator** and assign the `#{attachment_url}` value to it.

**Example:**\
`user_file = #{attachment_url}`&#x20;

<div data-with-frame="true"><figure><img src="/files/6dYG1CL7xdFu8mTNSSRL" alt="" width="563"><figcaption></figcaption></figure></div>

Assign the value of `attachment_url` to the variable `url_image1`.


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# Agent Instructions: Querying This Documentation

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
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```

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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.