mirror of
https://github.com/fumiama/terasu.git
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108 lines
3.4 KiB
Go
108 lines
3.4 KiB
Go
// Package http3 is the same as the standard http lib with HTTP3 client support
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package http3
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import (
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"bytes"
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"context"
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"crypto/rand"
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"crypto/tls"
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"errors"
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"io"
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mrand "math/rand"
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"net"
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"net/http"
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"net/netip"
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"net/url"
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base14 "github.com/fumiama/go-base16384"
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"github.com/fumiama/terasu/dialer"
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"github.com/fumiama/terasu/dns"
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"github.com/quic-go/quic-go"
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"github.com/quic-go/quic-go/http3"
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)
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// ErrEmptyHostAddress is returned when DNS lookup for a host returns no addresses
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var ErrEmptyHostAddress = errors.New("empty host addr")
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// DefaultClient is the default HTTP2 client that supports HTTP/2 and DNS resolution
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var DefaultClient = http.Client{
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Transport: &http3.Transport{
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Dial: func(ctx context.Context, addr string, tlsCfg *tls.Config, cfg *quic.Config) (quic.EarlyConnection, error) {
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host, port, err := net.SplitHostPort(addr)
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if err != nil {
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return nil, err
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}
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addrs, err := dns.LookupHost(ctx, host)
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if err != nil {
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return nil, err
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}
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if len(addrs) == 0 {
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return nil, ErrEmptyHostAddress
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}
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var conn net.Conn
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var qConn quic.EarlyConnection
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for _, a := range addrs {
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if dialer.DefaultDialer.Timeout != 0 {
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var cancel context.CancelFunc
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ctx, cancel = context.WithTimeout(context.Background(), dialer.DefaultDialer.Timeout)
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defer cancel()
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} else if !dialer.DefaultDialer.Deadline.IsZero() {
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var cancel context.CancelFunc
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ctx, cancel = context.WithDeadline(context.Background(), dialer.DefaultDialer.Deadline)
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defer cancel()
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}
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conn, err = net.ListenUDP("udp", nil)
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if err != nil {
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continue
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}
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ucon := conn.(*net.UDPConn)
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raddr := net.UDPAddrFromAddrPort(
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netip.MustParseAddrPort(net.JoinHostPort(a, port)),
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)
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n := (mrand.Intn(128) + 128) / 7 * 14
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w := bytes.NewBuffer(make([]byte, 0, base14.EncodeLen(n)))
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e := base14.NewEncoder(w)
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_, _ = io.CopyN(e, rand.Reader, int64(n))
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_ = e.Close()
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_, _ = ucon.WriteToUDP(w.Bytes(), raddr)
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// re-init ctx due to deadline settings in tcp dial
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if dialer.DefaultDialer.Timeout != 0 {
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var cancel context.CancelFunc
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ctx, cancel = context.WithTimeout(context.Background(), dialer.DefaultDialer.Timeout)
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defer cancel()
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} else if !dialer.DefaultDialer.Deadline.IsZero() {
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var cancel context.CancelFunc
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ctx, cancel = context.WithDeadline(context.Background(), dialer.DefaultDialer.Deadline)
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defer cancel()
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}
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qConn, err = quic.DialEarly(ctx, ucon, raddr, tlsCfg, cfg)
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if err == nil {
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break
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}
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panic(err)
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}
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return qConn, err
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},
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},
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}
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// Get sends an HTTP GET request to the specified URL using the default HTTP2 client
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func Get(url string) (resp *http.Response, err error) {
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return DefaultClient.Get(url)
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}
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// Head sends an HTTP HEAD request to the specified URL using the default HTTP2 client
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func Head(url string) (resp *http.Response, err error) {
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return DefaultClient.Head(url)
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}
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// Post sends an HTTP POST request to the specified URL with the given content type and body using the default HTTP2 client
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func Post(url string, contentType string, body io.Reader) (resp *http.Response, err error) {
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return DefaultClient.Post(url, contentType, body)
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}
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// PostForm sends an HTTP POST request with form data to the specified URL using the default HTTP2 client
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func PostForm(url string, data url.Values) (resp *http.Response, err error) {
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return DefaultClient.PostForm(url, data)
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}
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