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26 lines
862 B
26 lines
862 B
package middleware
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import (
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"net/http"
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"github.com/zenazn/goji/web"
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)
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// EnvInit is a middleware that allocates an environment map if one does not
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// already exist. This is necessary because Goji does not guarantee that Env is
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// present when running middleware (it avoids forcing the map allocation). Note
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// that other middleware should check Env for nil in order to maximize
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// compatibility (when EnvInit is not used, or when another middleware layer
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// blanks out Env), but for situations in which the user controls the middleware
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// stack and knows EnvInit is present, this middleware can eliminate a lot of
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// boilerplate.
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func EnvInit(c *web.C, h http.Handler) http.Handler {
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fn := func(w http.ResponseWriter, r *http.Request) {
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if c.Env == nil {
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c.Env = make(map[string]interface{})
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}
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h.ServeHTTP(w, r)
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}
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return http.HandlerFunc(fn)
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}
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