ws/http/upgrade/request/private.go

package request

import (
	"fmt"
	"git.xdrm.io/gws/internal/http/upgrade/request/parser/header"
)


// parseHeader parses any http request line
// (header and request-line)
func (r *T) parseHeader(b []byte) error {

	/* (1) First line -> GET {uri} HTTP/{version}
	---------------------------------------------------------*/
	if !r.first {

		err := r.request.Parse(b)

		if err != nil {
			return fmt.Errorf("Error while parsing first line: %s", err)
		}

		r.first = true
		return nil

	}



	/* (2) Other lines -> Header-Name: Header-Value
	---------------------------------------------------------*/
	/* (1) Try to parse header */
	head, err := header.Parse(b)
	if err != nil {
		return fmt.Errorf("Error parsing header: %s", err)
	}

	/* (2) Manage header */
	switch head.Name {

		case header.HOST:       fmt.Printf("[host]                   ")
			err = r.extractHostPort(head.Values)

		case header.ORIGIN:     fmt.Printf("[origin]                 ")
			err = r.extractOrigin(head.Values)

		case header.UPGRADE:    fmt.Printf("[upgrade]                ")
			err = r.checkUpgrade(head.Values)

		case header.CONNECTION: fmt.Printf("[connection]             ")
			err = r.checkConnection(head.Values)

		case header.WSVERSION:  fmt.Printf("[sec-websocket-version]  ")
			err = r.checkVersion(head.Values)

		case header.WSKEY:      fmt.Printf("[sec-websocket-key]      ")
			err = r.extractKey(head.Values)

		case header.WSPROTOCOL: fmt.Printf("[sec-websocket-protocol] ")
		default:
			return nil
	}


	if err != nil { return err }


	for i, v := range head.Values {
		if i == 0 { fmt.Printf("[ '%s'", v)
		} else { fmt.Printf(", '%s'", v) }
	}
	fmt.Printf(" ]\n");

	return nil

}



// isComplete returns whether the Upgrade Request
// is complete (no missing required item)
func (r T) isComplete() error {

	/* (1) Request-Line */
	if !r.first {
		return fmt.Errorf("Missing HTTP Request-Line");
	}

	/* (2) Host */
	if len(r.host) == 0 {
		return fmt.Errorf("Missing 'Host' header")
	}

	/* (3) Origin */
	if len(r.origin) == 0 {
		return fmt.Errorf("Missing 'Origin' header")
	}

	/* (4) Connection */
	if !r.hasConnection {
		return fmt.Errorf("Missing 'Connection' header");
	}

	/* (5) Upgrade */
	if !r.hasUpgrade {
		return fmt.Errorf("Missing 'Upgrade' header");
	}

	/* (6) Sec-WebSocket-Version */
	if !r.hasVersion {
		return fmt.Errorf("Missing 'Sec-WebSocket-Version' header");
	}

	/* (7) Sec-WebSocket-Key */
	if len(r.key) < 1 {
		return fmt.Errorf("Missing 'Sec-WebSocket-Key' header");
	}

	return nil

}