603 lines
11 KiB
Go
603 lines
11 KiB
Go
package http
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import (
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"bufio"
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"bytes"
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"crypto/tls"
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"errors"
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"io"
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"io/ioutil"
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"net"
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"net/http"
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"net/url"
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"sync"
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"time"
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"github.com/asim/go-micro/v3/network/transport"
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maddr "github.com/asim/go-micro/v3/util/addr"
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"github.com/asim/go-micro/v3/util/buf"
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mnet "github.com/asim/go-micro/v3/util/net"
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mls "github.com/asim/go-micro/v3/util/tls"
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"golang.org/x/net/http2"
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"golang.org/x/net/http2/h2c"
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)
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type httpTransport struct {
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opts transport.Options
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}
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type httpTransportClient struct {
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ht *httpTransport
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addr string
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conn net.Conn
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dialOpts transport.DialOptions
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once sync.Once
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sync.RWMutex
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// request must be stored for response processing
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r chan *http.Request
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bl []*http.Request
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buff *bufio.Reader
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// local/remote ip
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local string
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remote string
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}
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type httpTransportSocket struct {
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ht *httpTransport
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w http.ResponseWriter
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r *http.Request
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rw *bufio.ReadWriter
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mtx sync.RWMutex
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// the hijacked when using http 1
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conn net.Conn
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// for the first request
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ch chan *http.Request
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// h2 things
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buf *bufio.Reader
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// indicate if socket is closed
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closed chan bool
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// local/remote ip
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local string
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remote string
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}
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type httpTransportListener struct {
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ht *httpTransport
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listener net.Listener
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}
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func (h *httpTransportClient) Local() string {
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return h.local
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}
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func (h *httpTransportClient) Remote() string {
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return h.remote
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}
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func (h *httpTransportClient) Send(m *transport.Message) error {
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header := make(http.Header)
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for k, v := range m.Header {
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header.Set(k, v)
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}
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b := buf.New(bytes.NewBuffer(m.Body))
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defer b.Close()
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req := &http.Request{
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Method: "POST",
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URL: &url.URL{
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Scheme: "http",
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Host: h.addr,
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},
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Header: header,
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Body: b,
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ContentLength: int64(b.Len()),
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Host: h.addr,
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}
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h.Lock()
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h.bl = append(h.bl, req)
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select {
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case h.r <- h.bl[0]:
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h.bl = h.bl[1:]
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default:
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}
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h.Unlock()
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// set timeout if its greater than 0
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if h.ht.opts.Timeout > time.Duration(0) {
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h.conn.SetDeadline(time.Now().Add(h.ht.opts.Timeout))
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}
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return req.Write(h.conn)
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}
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func (h *httpTransportClient) Recv(m *transport.Message) error {
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if m == nil {
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return errors.New("message passed in is nil")
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}
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var r *http.Request
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if !h.dialOpts.Stream {
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rc, ok := <-h.r
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if !ok {
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return io.EOF
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}
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r = rc
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}
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// set timeout if its greater than 0
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if h.ht.opts.Timeout > time.Duration(0) {
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h.conn.SetDeadline(time.Now().Add(h.ht.opts.Timeout))
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}
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rsp, err := http.ReadResponse(h.buff, r)
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if err != nil {
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return err
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}
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defer rsp.Body.Close()
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b, err := ioutil.ReadAll(rsp.Body)
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if err != nil {
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return err
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}
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if rsp.StatusCode != 200 {
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return errors.New(rsp.Status + ": " + string(b))
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}
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m.Body = b
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if m.Header == nil {
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m.Header = make(map[string]string, len(rsp.Header))
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}
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for k, v := range rsp.Header {
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if len(v) > 0 {
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m.Header[k] = v[0]
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} else {
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m.Header[k] = ""
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}
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}
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return nil
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}
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func (h *httpTransportClient) Close() error {
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h.once.Do(func() {
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h.Lock()
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h.buff.Reset(nil)
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h.Unlock()
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close(h.r)
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})
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return h.conn.Close()
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}
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func (h *httpTransportSocket) Local() string {
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return h.local
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}
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func (h *httpTransportSocket) Remote() string {
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return h.remote
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}
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func (h *httpTransportSocket) Recv(m *transport.Message) error {
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if m == nil {
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return errors.New("message passed in is nil")
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}
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if m.Header == nil {
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m.Header = make(map[string]string, len(h.r.Header))
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}
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// process http 1
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if h.r.ProtoMajor == 1 {
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// set timeout if its greater than 0
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if h.ht.opts.Timeout > time.Duration(0) {
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h.conn.SetDeadline(time.Now().Add(h.ht.opts.Timeout))
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}
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var r *http.Request
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select {
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// get first request
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case r = <-h.ch:
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// read next request
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default:
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rr, err := http.ReadRequest(h.rw.Reader)
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if err != nil {
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return err
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}
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r = rr
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}
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// read body
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b, err := ioutil.ReadAll(r.Body)
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if err != nil {
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return err
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}
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// set body
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r.Body.Close()
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m.Body = b
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// set headers
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for k, v := range r.Header {
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if len(v) > 0 {
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m.Header[k] = v[0]
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} else {
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m.Header[k] = ""
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}
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}
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// return early early
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return nil
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}
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// only process if the socket is open
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select {
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case <-h.closed:
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return io.EOF
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default:
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// no op
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}
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// processing http2 request
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// read streaming body
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// set max buffer size
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// TODO: adjustable buffer size
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buf := make([]byte, 4*1024*1024)
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// read the request body
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n, err := h.buf.Read(buf)
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// not an eof error
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if err != nil {
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return err
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}
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// check if we have data
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if n > 0 {
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m.Body = buf[:n]
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}
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// set headers
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for k, v := range h.r.Header {
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if len(v) > 0 {
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m.Header[k] = v[0]
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} else {
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m.Header[k] = ""
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}
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}
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// set path
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m.Header[":path"] = h.r.URL.Path
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return nil
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}
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func (h *httpTransportSocket) Send(m *transport.Message) error {
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if h.r.ProtoMajor == 1 {
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// make copy of header
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hdr := make(http.Header)
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for k, v := range h.r.Header {
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hdr[k] = v
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}
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rsp := &http.Response{
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Header: hdr,
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Body: ioutil.NopCloser(bytes.NewReader(m.Body)),
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Status: "200 OK",
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StatusCode: 200,
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Proto: "HTTP/1.1",
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ProtoMajor: 1,
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ProtoMinor: 1,
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ContentLength: int64(len(m.Body)),
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}
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for k, v := range m.Header {
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rsp.Header.Set(k, v)
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}
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// set timeout if its greater than 0
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if h.ht.opts.Timeout > time.Duration(0) {
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h.conn.SetDeadline(time.Now().Add(h.ht.opts.Timeout))
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}
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return rsp.Write(h.conn)
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}
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// only process if the socket is open
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select {
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case <-h.closed:
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return io.EOF
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default:
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// no op
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}
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// we need to lock to protect the write
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h.mtx.RLock()
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defer h.mtx.RUnlock()
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// set headers
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for k, v := range m.Header {
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h.w.Header().Set(k, v)
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}
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// write request
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_, err := h.w.Write(m.Body)
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// flush the trailers
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h.w.(http.Flusher).Flush()
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return err
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}
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func (h *httpTransportSocket) error(m *transport.Message) error {
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if h.r.ProtoMajor == 1 {
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rsp := &http.Response{
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Header: make(http.Header),
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Body: ioutil.NopCloser(bytes.NewReader(m.Body)),
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Status: "500 Internal Server Error",
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StatusCode: http.StatusInternalServerError,
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Proto: "HTTP/1.1",
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ProtoMajor: 1,
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ProtoMinor: 1,
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ContentLength: int64(len(m.Body)),
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}
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for k, v := range m.Header {
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rsp.Header.Set(k, v)
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}
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return rsp.Write(h.conn)
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}
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return nil
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}
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func (h *httpTransportSocket) Close() error {
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h.mtx.Lock()
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defer h.mtx.Unlock()
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select {
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case <-h.closed:
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return nil
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default:
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// close the channel
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close(h.closed)
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// close the buffer
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h.r.Body.Close()
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// close the connection
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if h.r.ProtoMajor == 1 {
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return h.conn.Close()
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}
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}
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return nil
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}
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func (h *httpTransportListener) Addr() string {
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return h.listener.Addr().String()
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}
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func (h *httpTransportListener) Close() error {
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return h.listener.Close()
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}
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func (h *httpTransportListener) Accept(fn func(transport.Socket)) error {
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// create handler mux
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mux := http.NewServeMux()
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// register our transport handler
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mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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var buf *bufio.ReadWriter
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var con net.Conn
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// read a regular request
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if r.ProtoMajor == 1 {
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b, err := ioutil.ReadAll(r.Body)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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r.Body = ioutil.NopCloser(bytes.NewReader(b))
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// hijack the conn
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hj, ok := w.(http.Hijacker)
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if !ok {
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// we're screwed
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http.Error(w, "cannot serve conn", http.StatusInternalServerError)
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return
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}
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conn, bufrw, err := hj.Hijack()
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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defer conn.Close()
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buf = bufrw
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con = conn
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}
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// buffered reader
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bufr := bufio.NewReader(r.Body)
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// save the request
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ch := make(chan *http.Request, 1)
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ch <- r
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// create a new transport socket
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sock := &httpTransportSocket{
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ht: h.ht,
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w: w,
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r: r,
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rw: buf,
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buf: bufr,
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ch: ch,
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conn: con,
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local: h.Addr(),
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remote: r.RemoteAddr,
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closed: make(chan bool),
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}
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// execute the socket
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fn(sock)
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})
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// get optional handlers
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if h.ht.opts.Context != nil {
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handlers, ok := h.ht.opts.Context.Value("http_handlers").(map[string]http.Handler)
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if ok {
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for pattern, handler := range handlers {
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mux.Handle(pattern, handler)
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}
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}
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}
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// default http2 server
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srv := &http.Server{
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Handler: mux,
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}
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// insecure connection use h2c
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if !(h.ht.opts.Secure || h.ht.opts.TLSConfig != nil) {
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srv.Handler = h2c.NewHandler(mux, &http2.Server{})
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}
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// begin serving
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return srv.Serve(h.listener)
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}
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func (h *httpTransport) Dial(addr string, opts ...transport.DialOption) (transport.Client, error) {
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dopts := transport.DialOptions{
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Timeout: transport.DefaultDialTimeout,
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}
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for _, opt := range opts {
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opt(&dopts)
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}
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var conn net.Conn
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var err error
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// TODO: support dial option here rather than using internal config
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if h.opts.Secure || h.opts.TLSConfig != nil {
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config := h.opts.TLSConfig
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if config == nil {
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config = &tls.Config{
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InsecureSkipVerify: true,
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}
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}
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config.NextProtos = []string{"http/1.1"}
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conn, err = newConn(func(addr string) (net.Conn, error) {
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return tls.DialWithDialer(&net.Dialer{Timeout: dopts.Timeout}, "tcp", addr, config)
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})(addr)
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} else {
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conn, err = newConn(func(addr string) (net.Conn, error) {
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return net.DialTimeout("tcp", addr, dopts.Timeout)
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})(addr)
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}
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if err != nil {
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return nil, err
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}
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return &httpTransportClient{
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ht: h,
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addr: addr,
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conn: conn,
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buff: bufio.NewReader(conn),
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dialOpts: dopts,
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r: make(chan *http.Request, 1),
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local: conn.LocalAddr().String(),
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remote: conn.RemoteAddr().String(),
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}, nil
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}
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func (h *httpTransport) Listen(addr string, opts ...transport.ListenOption) (transport.Listener, error) {
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var options transport.ListenOptions
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for _, o := range opts {
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o(&options)
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}
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var l net.Listener
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var err error
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// TODO: support use of listen options
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if h.opts.Secure || h.opts.TLSConfig != nil {
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config := h.opts.TLSConfig
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fn := func(addr string) (net.Listener, error) {
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if config == nil {
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hosts := []string{addr}
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// check if its a valid host:port
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if host, _, err := net.SplitHostPort(addr); err == nil {
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if len(host) == 0 {
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hosts = maddr.IPs()
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} else {
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hosts = []string{host}
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}
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}
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// generate a certificate
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cert, err := mls.Certificate(hosts...)
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if err != nil {
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return nil, err
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}
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config = &tls.Config{Certificates: []tls.Certificate{cert}}
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}
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return tls.Listen("tcp", addr, config)
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}
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l, err = mnet.Listen(addr, fn)
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} else {
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fn := func(addr string) (net.Listener, error) {
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return net.Listen("tcp", addr)
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}
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l, err = mnet.Listen(addr, fn)
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}
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if err != nil {
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return nil, err
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}
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return &httpTransportListener{
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ht: h,
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listener: l,
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}, nil
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}
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func (h *httpTransport) Init(opts ...transport.Option) error {
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for _, o := range opts {
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o(&h.opts)
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}
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return nil
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}
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func (h *httpTransport) Options() transport.Options {
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return h.opts
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}
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func (h *httpTransport) String() string {
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return "http"
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}
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func NewTransport(opts ...transport.Option) transport.Transport {
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var options transport.Options
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for _, o := range opts {
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o(&options)
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}
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return &httpTransport{opts: options}
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}
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