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36 lines
842 B
Go
36 lines
842 B
Go
/*
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* SPDX-License-Identifier: AGPL-3.0-only
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* Copyright (c) since 2023, v2rayA Organization <team@v2raya.org>
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*/
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package sniffing
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import "bytes"
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func (s *Sniffer) SniffHttp() (d string, err error) {
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search := s.buf
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if len(search) > 20 {
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search = search[:20]
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}
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method, _, found := bytes.Cut(search, []byte(" "))
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if !found {
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return "", NotApplicableError
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}
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switch string(method) {
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case "GET", "POST", "PUT", "PATCH", "DELETE", "COPY", "HEAD", "OPTIONS", "LINK", "UNLINK", "PURGE", "LOCK", "UNLOCK", "PROPFIND":
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default:
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return "", NotApplicableError
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}
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search = s.buf
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prefix := []byte("Host: ")
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_, afterHostKey, found := bytes.Cut(search, prefix)
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if !found {
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return "", NotFoundError
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}
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host, _, found := bytes.Cut(afterHostKey, []byte("\r\n"))
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if !found {
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return "", NotFoundError
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}
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return string(host), nil
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}
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