86 lines
1.6 KiB
Go
86 lines
1.6 KiB
Go
package http
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import (
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"strings"
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osm "git.loafle.net/overflow/service_matcher-go"
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)
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type HTTPMatcher struct {
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osm.Matchers
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}
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func (m *HTTPMatcher) Key() string {
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return "HTTP"
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}
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func (m *HTTPMatcher) Name(matchCtx *osm.MatchCtx) string {
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name := "HTTP"
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if v, ok := matchCtx.GetAttribute("server"); ok {
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name = name + " (" + v.(string) + ")"
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}
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return name
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}
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func (m *HTTPMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
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return false
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}
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func (m *HTTPMatcher) HasResponse(matchCtx *osm.MatchCtx, index int) bool {
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return true
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}
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func (m *HTTPMatcher) IsError(matchCtx *osm.MatchCtx, index int, packet *osm.Packet) bool {
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return false
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}
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func (m *HTTPMatcher) Match(matchCtx *osm.MatchCtx, index int, packet *osm.Packet) error {
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if packet == nil || !packet.Valid() {
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return osm.NoPacketReceivedError()
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}
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str := string(packet.Bytes())
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elems := strings.Split(str, "\r\n")
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if len(elems) <= 0 || 9 > len(elems[0]) {
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return osm.NotMatchedError()
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}
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protocol := (elems[0])[:8]
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if !strings.HasPrefix(protocol, "HTTP/") {
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return osm.NotMatchedError()
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}
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serverName := ""
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for _, valueStr := range elems {
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tempElems := strings.Split(valueStr, ":")
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if 0 == strings.Compare(tempElems[0], "Server") {
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serverName = strings.TrimSpace(tempElems[1])
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break
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}
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}
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matchCtx.SetAttribute("protocol_version", protocol)
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if len(serverName) > 0 {
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matchCtx.SetAttribute("server", serverName)
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}
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return nil
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}
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func NewMatcher() osm.Matcher {
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m := &HTTPMatcher{}
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reqStr := "GET / HTTP/1.1\r\n\r\n"
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byte := make([]byte, len(reqStr))
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copy(byte[:], reqStr)
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m.AddPacket(osm.NewPacket(byte, len(reqStr)))
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return m
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}
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