woodpecker/server/blobstore/context.go

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package blobstore
import (
"code.google.com/p/go.net/context"
)
const reqkey = "blobstore"
// NewContext returns a Context whose Value method returns the
// application's Blobstore data.
func NewContext(parent context.Context, store Blobstore) context.Context {
return &wrapper{parent, store}
}
type wrapper struct {
context.Context
store Blobstore
}
// Value returns the named key from the context.
func (c *wrapper) Value(key interface{}) interface{} {
if key == reqkey {
return c.store
}
return c.Context.Value(key)
}
// FromContext returns the Blobstore associated with this context.
func FromContext(c context.Context) Blobstore {
return c.Value(reqkey).(Blobstore)
}