eventloop

Documentation

Index

• type Loop
  • func Start(host string, port int, dump bool) (*Loop, error)

Types

type Loop

type Loop struct {
	HttpRequests       chan (message.HttpRequest)
	MonitoringRequests chan (message.MonitoringRequest)
	IncomingFrames     chan (frames.Frame)
	Shutdown           chan (bool)
	Host               string
	Port               int
}

func Start

func Start(host string, port int, dump bool) (*Loop, error)

Start starts the event loop managing the HTTP/2 communication with a server.

A lot of HTTP/2 features are hard to implement in a thread safe way:

• Push promises arriving while the client sends a request at the same time.
• Window updates increase the flow control window while the client sends data and decreases the flow control window at the same time.
• etc.

Therefore, each HTTP/2 connection is handled single thread in h2c.

The eventloop takes all events, and executes them sequentially in a single thread. The implementation in github.com/fstab/h2c/http2client/connection does not need to care about thread safety.

There are two sources of events:

1. Command line: A user types a comand in order to send a GET, POST, ... request. 2. Network Socket: Frames received from the server.