mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-01 15:00:00 +00:00
71 lines
2.1 KiB
Go
71 lines
2.1 KiB
Go
|
/*
|
||
|
|
GoToSocial
|
||
|
|
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
|
||
|
|
|
||
|
|
This program is free software: you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU Affero General Public License as published by
|
||
|
|
the Free Software Foundation, either version 3 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
This program is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
GNU Affero General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Affero General Public License
|
||
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package security
|
||
|
|
|
||
|
|
import (
|
||
|
|
"net"
|
||
|
|
"net/http"
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"github.com/gin-gonic/gin"
|
||
|
|
limiter "github.com/ulule/limiter/v3"
|
||
|
|
mgin "github.com/ulule/limiter/v3/drivers/middleware/gin"
|
||
|
|
memory "github.com/ulule/limiter/v3/drivers/store/memory"
|
||
|
|
)
|
||
|
|
|
||
|
|
type RateLimitOptions struct {
|
||
|
|
Period time.Duration
|
||
|
|
Limit int64
|
||
|
|
}
|
||
|
|
|
||
|
|
func (m *Module) LimitReachedHandler(c *gin.Context) {
|
||
|
|
code := http.StatusTooManyRequests
|
||
|
|
c.AbortWithStatusJSON(code, gin.H{"error": "rate limit reached"})
|
||
|
|
}
|
||
|
|
|
||
|
|
// returns a gin middleware that will automatically rate limit caller (by IP address)
|
||
|
|
// and enrich the response header with the following headers:
|
||
|
|
// - `x-ratelimit-limit` maximum number of requests allowed per time period (fixed)
|
||
|
|
// - `x-ratelimit-remaining` number of remaining requests that can still be performed
|
||
|
|
// - `x-ratelimit-reset` unix timestamp when the rate limit will reset
|
||
|
|
// if `x-ratelimit-limit` is exceeded an HTTP 429 error is returned
|
||
|
|
func (m *Module) RateLimit(rateOptions RateLimitOptions) func(c *gin.Context) {
|
||
|
|
rate := limiter.Rate{
|
||
|
|
Period: rateOptions.Period,
|
||
|
|
Limit: rateOptions.Limit,
|
||
|
|
}
|
||
|
|
|
||
|
|
store := memory.NewStore()
|
||
|
|
|
||
|
|
limiterInstance := limiter.New(
|
||
|
|
store,
|
||
|
|
rate,
|
||
|
|
// apply /64 mask to IPv6 addresses
|
||
|
|
limiter.WithIPv6Mask(net.CIDRMask(64, 128)),
|
||
|
|
)
|
||
|
|
|
||
|
|
middleware := mgin.NewMiddleware(
|
||
|
|
limiterInstance,
|
||
|
|
// use custom rate limit reached error
|
||
|
|
mgin.WithLimitReachedHandler(m.LimitReachedHandler),
|
||
|
|
)
|
||
|
|
|
||
|
|
return middleware
|
||
|
|
}
|