# Crate hyper [−] [src]

# hyper

hyper is a fast and correct HTTP implementation written in and for Rust.

## Features

- HTTP/1 and HTTP/2
- Asynchronous design
- Leading in performance
- Tested and correct
- Extensive production use
- Client and Server APIs

If just starting out, check out the Guides first.

## “Low-level”

hyper is a lower-level HTTP library, meant to be a building block for libraries and applications.

If looking for just a convenient HTTP client, consider the reqwest crate.

# Optional Features

hyper uses a set of feature flags to reduce the amount of compiled code. It is possible to just enable certain features over others. By default, hyper does not enable any features but allows one to enable a subset for their use case. Below is a list of the available feature flags. You may also notice above each function, struct and trait there is listed one or more feature flags that are required for that item to be used.

If you are new to hyper it is possible to enable the `full` feature flag which will enable all public APIs. Beware though that this will pull in many extra dependencies that you may not need.

The following optional features are available:

- `http1`: Enables HTTP/1 support.
- `http2`: Enables HTTP/2 support.
- `client`: Enables the HTTP `client`.
- `server`: Enables the HTTP `server`.
- `runtime`: Enables convenient integration with `tokio`, providing connectors and acceptors for TCP, and a default executor.
- `tcp`: Enables convenient implementations over TCP (using tokio).
- `stream`: Provides `futures::Stream` capabilities.

## Re-exports

`pub use crate::client::Client;`

## Modules

body | Streaming bodies for Requests and Responses
client | HTTP Client
header | HTTP header types
rt | Runtime components
service | Asynchronous Services
upgrade | HTTP Upgrades

## Structs

Body | A stream of `Bytes`, used when receiving bodies.
Error | Represents errors that can occur handling HTTP streams.
HeaderMap | A set of HTTP headers
Method | The Request Method (VERB)
Request | Represents an HTTP request.
Response | Represents an HTTP response
StatusCode | An HTTP status code (`status-code` in RFC 7230 et al.).
Uri | The URI component of a request.
Version | Represents a version of the HTTP spec.

## Type Definitions

Result | Result type often returned from methods that can have hyper `Error`s.