ylong_http

Introduction

ylong_http has built a complete HTTP capability, supporting users to use HTTP capability to meet the needs of communication scenarios.

ylong_http is written in the Rust language to support OpenHarmony's Rust capability.

The position of ylong_http in OpenHarmony

ylong_http provides HTTP protocol support to the netstack module in the OpenHarmony system service layer, and through the netstack module, helps upper layer applications build HTTP communication capabilities.

The following is the description information for the key fields in the figure above:

• APP: A direct user facing upper level application that requires the ability to upload and download.
• request: The component in the OpenHarmony system service layer that provides upload and download capabilities.
• netstack: The system component in the OpenHarmony system service layer that provides network protocol stack functionality.
• ylong_http: The system component in the OpenHarmony system service layer that provides HTTP protocol stack functionality.
  • ylong_http_client: One of the modules under ylong_http provides HTTP client capabilities.
  • ylong_http: One of the modules under ylong_http provides the basic components of HTTP.
• ylong_runtime: Rust asynchronous runtime library provided by ylong in the system service layer.
• tokio: The third-party rust asynchronous runtime library commonly used in the industry.
• OpenSSL: A commonly used third-party TLS implementation library in the industry.

The internal structure of ylong_http

The following is the description information for the key fields in the figure above:

• ylong_http_client: One of the modules under ylong_http provides HTTP client capabilities.
  • sync_impl: Synchronize HTTP client implementation without relying on any runtime.
    • Client: Synchronize HTTP clients to send HTTP requests.
    • ConnectionPool: Manage all Dispatchers.
    • Dispatcher: Manage the usage rights of Connections.
    • Connector: Used to create a synchronous connection.
    • Connections: Synchronous TCP or TLS connections, etc.
  • async_impl: Asynchronous HTTP client implementation.
    • Client: Asynchronous HTTP client used to send HTTP requests.
    • ConnectionPool: Manage all Dispatchers.
    • Dispatcher: Manage the usage rights of Connections.
    • Connector: Used to create an asynchronous connection.
    • Connections: Asynchronous TCP or TLS connections, etc.
  • Util: Contains common components for both synchronous and asynchronous HTTP client implementations.
    • Redirect: HTTP automatic redirection policy.
    • Proxy: HTTP proxy policy.
    • Pool: Universal Connection pool implementation.
    • OpenSSL_adapter: OpenSSL Rust adaptation layer.
• ylong_http: One of the modules under ylong_http provides the basic components of HTTP.
  • Request: HTTP Request implementation.
  • Response: HTTP Response implementation.
  • Body: HTTP message body implementation.
    • TextBody: HTTP message body in plain text.
    • EmptyBody: Empty message body implementation.
    • Mime: Multipart message body implementation.
    • ylong_http: ChunkBody message body implementation.
  • H1: HTTP1 related component implementation.
  • H2: HTTP2 related component implementation.
  • H3: HTTP3 related component implementation.

ylong_http_client crate

ylong_http_client crate supports HTTP client functionality and allows users to create HTTP clients to send HTTP requests to specified servers.

Abilities supported by the current ylong_http_client crate:

• Synchronous and asynchronous HTTP clients.
• HTTP/1.1 and HTTP/2 protocol versions.
• Proxy.
• Redirect.
• Automatic retry.
• Progress callback.
• Connection management and reuse.

ylong_http crate

ylong_http crate provides various basic components of the HTTP protocol, such as serialization components, compression components, etc.

Abilities supported by the current ylong_http crate:

• Serializer and deserializer of HTTP/1.1 and HTTP/2.
• HPACK implementation.
• Basic types of HTTP Request and HTTP Response.
• Body trait and implementations of bodies.

Build

GN is supported. User should add dependencies in deps of BUILD.gn to build this crate.

deps += ["//example_path/ylong_http_client:ylong_http_client"]

Cargo is supported. User should add dependencies in Cargo.toml to build this crate.

[dependencies]
ylong_http_client = { path = "/example_path/ylong_http_client" }

Directory

ylong_http
├── docs                        # User's guide
├── figures                     # Resources
├── patches                     # Patches for ci
├── ylong_http
│   ├── examples                # Examples of ylong_http
│   ├── src                     # Source code ylong_http
│   │   ├── body                # Body trait and body types
│   │   ├── h1                  # HTTP/1.1 components
│   │   ├── h2                  # HTTP/2 components
│   │   ├── h3                  # HTTP/3 components
│   │   ├── huffman             # Huffman
│   │   ├── request             # Request type
│   │   └── response            # Response type
│   └── tests                   # Tests of ylong_http
│
└── ylong_http_client
    ├── examples                # Examples of ylong_http_client
    ├── src                     # Source code of ylong_http_client
    │   ├── async_impl          # Asynchronous client implementation
    │   │   ├── conn            # Asynchronous connection layer
    │   │   ├── downloader      # Asynchronous downloader layer
    │   │   ├── ssl_stream      # Asynchronous TLS layer
    │   │   └── uploader        # Asynchronous uploader layer
    │   ├── sync_impl           # Synchronous client implementation
    │   │   └── conn            # Synchronous connection layer
    │   └── util                # Components of ylong_http_client  
    │       ├── c_openssl       # OpenSSL adapter
    │       │   ├── ffi         # OpenSSL ffi adapter
    │       │   └── ssl         # OpenSSL ssl adapter 
    │       └── config          # Configures
    │           └── tls         # TLS Configures
    │               └── alpn    # ALPN Configures
    └── tests                   # Tests of ylong_http_client