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corehttp.go
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corehttp.go
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package corehttp
import (
"net/http"
manners "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/braintree/manners"
ma "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-multiaddr"
manet "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-multiaddr-net"
core "github.com/jbenet/go-ipfs/core"
eventlog "github.com/jbenet/go-ipfs/thirdparty/eventlog"
)
var log = eventlog.Logger("core/server")
// ServeOption registers any HTTP handlers it provides on the given mux.
// It returns the mux to expose to future options, which may be a new mux if it
// is interested in mediating requests to future options, or the same mux
// initially passed in if not.
type ServeOption func(*core.IpfsNode, *http.ServeMux) (*http.ServeMux, error)
// makeHandler turns a list of ServeOptions into a http.Handler that implements
// all of the given options, in order.
func makeHandler(n *core.IpfsNode, options ...ServeOption) (http.Handler, error) {
topMux := http.NewServeMux()
mux := topMux
for _, option := range options {
var err error
mux, err = option(n, mux)
if err != nil {
return nil, err
}
}
return topMux, nil
}
// ListenAndServe runs an HTTP server listening at |listeningMultiAddr| with
// the given serve options. The address must be provided in multiaddr format.
//
// TODO intelligently parse address strings in other formats so long as they
// unambiguously map to a valid multiaddr. e.g. for convenience, ":8080" should
// map to "/ip4/0.0.0.0/tcp/8080".
func ListenAndServe(n *core.IpfsNode, listeningMultiAddr string, options ...ServeOption) error {
addr, err := ma.NewMultiaddr(listeningMultiAddr)
if err != nil {
return err
}
handler, err := makeHandler(n, options...)
if err != nil {
return err
}
return listenAndServe(n, addr, handler)
}
func listenAndServe(node *core.IpfsNode, addr ma.Multiaddr, handler http.Handler) error {
_, host, err := manet.DialArgs(addr)
if err != nil {
return err
}
server := manners.NewServer()
// if the server exits beforehand
var serverError error
serverExited := make(chan struct{})
go func() {
serverError = server.ListenAndServe(host, handler)
close(serverExited)
}()
// wait for server to exit.
select {
case <-serverExited:
// if node being closed before server exits, close server
case <-node.Closing():
log.Infof("server at %s terminating...", addr)
server.Shutdown <- true
<-serverExited // now, DO wait until server exit
}
log.Infof("server at %s terminated", addr)
return serverError
}