---
title: http.request.headers.names
description: The names of the headers in the HTTP request.
image: https://developers.cloudflare.com/core-services-preview.png
---

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#  http.request.headers.names 

`http.request.headers.names` ` Array<String> ` 

The names of the headers in the HTTP request.

The names are not pre-processed and retain the original case used in the request.

The order of header names is not guaranteed but will match [http.request.headers.values](https://developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/http.request.headers.values/).

Duplicate headers are listed multiple times.

* **Decoding**: No decoding performed
* **Whitespace**: Preserved
* **Non-ASCII**: Preserved

When the HTTP request contains too many headers, this field may not contain the names of all of the headers sent in the HTTP request. In this situation, the [http.request.headers.truncated](https://developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/http.request.headers.truncated/) field will be set to `true`.

**Note**: In HTTP/2, the names of HTTP headers are always in lowercase. Recent versions of the `curl` tool [enable HTTP/2 by default](https://curl.se/docs/manpage.html#--http2) for HTTPS connections.

Example value:

```
["content-type"]
```

Example usage:

```
any(http.request.headers.names[*] == "content-type")
```

Categories: 
* Request
* Headers

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```