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671f160746
## What changed? Add a dynamic config to restrict which HTTP `Host` header values are allowed in HTTP API requests. ## Why? Prevent DNS rebinding attacks. ## How did you test it? Added a functional test. --------- Co-authored-by: David Reiss <[email protected]>
81 lines
2.9 KiB
Go
81 lines
2.9 KiB
Go
// The MIT License
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//
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// Copyright (c) 2024 Temporal Technologies Inc. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package dynamicconfig
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import (
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"fmt"
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"sync/atomic"
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"go.temporal.io/server/common/log/tag"
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)
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// GlobalCachedTypedValue holds a cached value of a GlobalTypedSetting after applying a supplied convert function.
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// This type should be deleted after dynamicconfig handles conversion more efficiently.
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type GlobalCachedTypedValue[T any] struct {
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ptr atomic.Pointer[T]
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cancel func()
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}
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// NewGlobalCachedTypedValue returns a new [GlobalCachedTypedValue] for the given setting, applying the given convert
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// function on change.
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// If convert returns an error the old value will be preserved. If convert never succeeds, Get() will return the zero
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// value of T.
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func NewGlobalCachedTypedValue[T, I any](c *Collection, setting GlobalTypedSetting[I], convert func(I) (T, error)) *GlobalCachedTypedValue[T] {
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cachedValue := new(GlobalCachedTypedValue[T])
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initial, cancel := setting.Subscribe(c)(func(i I) {
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converted, err := convert(i)
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if err != nil {
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c.logger.Warn(fmt.Sprintf("Failed to convert %q attribute", setting.Key().String()), tag.Value(i), tag.Error(err))
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return
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}
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// Make sure to only store the value on successful conversion.
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cachedValue.ptr.Store(&converted)
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})
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cachedValue.cancel = cancel
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converted, err := convert(initial)
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if err != nil {
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c.logger.Warn(fmt.Sprintf("Failed to convert %q attribute", setting.Key().String()), tag.Value(initial), tag.Error(err))
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} else {
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// Make sure to only store the value on successful conversion.
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cachedValue.ptr.Store(&converted)
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}
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return cachedValue
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}
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// Get the last successfully converted cached value or the zero value if convert has never succeeded.
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func (s *GlobalCachedTypedValue[T]) Get() T {
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v := s.ptr.Load()
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if v == nil {
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var t T
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return t
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}
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return *v
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}
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func (s *GlobalCachedTypedValue[T]) Close() error {
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s.cancel()
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return nil
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}
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