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Add inbound chat event rate limiting. Closes #484

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This commit is contained in:
Gabe Kangas 2021-01-01 16:55:04 -08:00
parent 997ada69b1
commit 1dc25889ec
3 changed files with 22 additions and 1 deletions
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20
core/chat/client.go
View file

@ -14,6 +14,7 @@ import (
"github.com/owncast/owncast/utils"
"github.com/teris-io/shortid"
"golang.org/x/time/rate"
)
const channelBufSize = 100
@ -35,6 +36,8 @@ type Client struct {
usernameChangeChannel chan models.NameChangeEvent
doneCh chan bool
rateLimiter *rate.Limiter
}
const (
@ -61,7 +64,9 @@ func NewClient(ws *websocket.Conn) *Client {
socketID, _ := shortid.Generate()
clientID := socketID
return &Client{time.Now(), 0, userAgent, ipAddress, nil, clientID, nil, socketID, ws, ch, pingch, usernameChangeChannel, doneCh}
rateLimiter := rate.NewLimiter(0.6, 5)
return &Client{time.Now(), 0, userAgent, ipAddress, nil, clientID, nil, socketID, ws, ch, pingch, usernameChangeChannel, doneCh, rateLimiter}
}
// GetConnection gets the connection for the client.
@ -124,6 +129,15 @@ func (c *Client) handleClientSocketError(err error) {
_server.removeClient(c)
}
func (c *Client) passesRateLimit() bool {
if !c.rateLimiter.Allow() {
log.Warnln("Client", c.ClientID, "has exceeded the messaging rate limiting thresholds.")
return false
}
return true
}
// Listen read request via channel.
func (c *Client) listenRead() {
for {
@ -155,6 +169,10 @@ func (c *Client) listenRead() {
messageType := messageTypeCheck["type"]
if !c.passesRateLimit() {
continue
}
if messageType == CHAT {
c.chatMessageReceived(data)
} else if messageType == NAMECHANGE {

1
go.mod
View file

@ -21,6 +21,7 @@ require (
github.com/teris-io/shortid v0.0.0-20171029131806-771a37caa5cf
github.com/yuin/goldmark v1.3.1
golang.org/x/net v0.0.0-20201110031124-69a78807bb2b
golang.org/x/time v0.0.0-20201208040808-7e3f01d25324
gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
gopkg.in/yaml.v2 v2.4.0
mvdan.cc/xurls v1.1.0

2
go.sum
View file

@ -79,6 +79,8 @@ golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7w
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/time v0.0.0-20201208040808-7e3f01d25324 h1:Hir2P/De0WpUhtrKGGjvSb2YxUgyZ7EFOSLIcSSpiwE=
golang.org/x/time v0.0.0-20201208040808-7e3f01d25324/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=