mirror of
https://github.com/fumiama/terasu.git
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117 lines
3.5 KiB
Go
117 lines
3.5 KiB
Go
// Package http2 is the same as the standard http lib with HTTP2 client support
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package http2
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import (
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"context"
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"crypto/tls"
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"errors"
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"io"
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"net"
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"net/http"
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"net/url"
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"time"
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"golang.org/x/net/http2"
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"github.com/fumiama/terasu"
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"github.com/fumiama/terasu/dns"
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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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// defaultDialer is the default dialer used for establishing TCP connections
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var defaultDialer = net.Dialer{
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Timeout: 10 * time.Second,
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}
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// SetDefaultClientTimeout sets the default timeout for all HTTP2 client connections
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func SetDefaultClientTimeout(t time.Duration) {
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defaultDialer.Timeout = t
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}
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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: &http2.Transport{
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DialTLSContext: func(ctx context.Context, network, addr string, cfg *tls.Config) (net.Conn, 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 tlsConn *tls.Conn
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for _, a := range addrs {
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if defaultDialer.Timeout != 0 {
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var cancel context.CancelFunc
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ctx, cancel = context.WithTimeout(context.Background(), defaultDialer.Timeout)
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defer cancel()
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} else if !defaultDialer.Deadline.IsZero() {
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var cancel context.CancelFunc
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ctx, cancel = context.WithDeadline(context.Background(), defaultDialer.Deadline)
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defer cancel()
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}
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conn, err = defaultDialer.DialContext(ctx, network, net.JoinHostPort(a, port))
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if err != nil {
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continue
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}
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tlsConn = tls.Client(terasu.NewConn(conn), cfg)
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// re-init ctx due to deadline settings in tcp dial
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if defaultDialer.Timeout != 0 {
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var cancel context.CancelFunc
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ctx, cancel = context.WithTimeout(context.Background(), defaultDialer.Timeout)
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defer cancel()
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} else if !defaultDialer.Deadline.IsZero() {
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var cancel context.CancelFunc
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ctx, cancel = context.WithDeadline(context.Background(), defaultDialer.Deadline)
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defer cancel()
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}
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err = tlsConn.HandshakeContext(ctx)
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if err == nil {
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break
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}
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_ = tlsConn.Close()
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tlsConn = nil
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conn, err = defaultDialer.DialContext(ctx, network, net.JoinHostPort(a, port))
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if err != nil {
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continue
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}
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tlsConn = tls.Client(terasu.NewConn(conn), cfg)
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err = tlsConn.HandshakeContext(ctx)
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if err == nil {
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break
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}
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_ = tlsConn.Close()
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tlsConn = nil
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}
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return tlsConn, 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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