---
title: "addHTTPHeader(_:length:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/nsmutabledictionary/addhttpheader(_:length:)"
---

# addHTTPHeader(_:length:)

## Declaration

```swift
func addHTTPHeader(_ inHeaderData: UnsafeRawPointer!, length inHeaderDataLength: UInt32) -> OBEXError
```