56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
package http
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import (
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"context"
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"net/http"
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"forge.cadoles.com/arcad/edge/pkg/bus"
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"github.com/pkg/errors"
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)
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type contextKey string
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var (
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contextKeyBus contextKey = "bus"
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contextKeyHTTPRequest contextKey = "httpRequest"
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contextKeyHTTPClient contextKey = "httpClient"
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)
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func (h *Handler) contextMiddleware(next http.Handler) http.Handler {
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fn := func(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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ctx = context.WithValue(ctx, contextKeyBus, h.bus)
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ctx = context.WithValue(ctx, contextKeyHTTPRequest, r)
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ctx = context.WithValue(ctx, contextKeyHTTPClient, h.httpClient)
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r = r.WithContext(ctx)
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next.ServeHTTP(w, r)
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}
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return http.HandlerFunc(fn)
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}
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func ContextBus(ctx context.Context) bus.Bus {
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return contextValue[bus.Bus](ctx, contextKeyBus)
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}
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func ContextHTTPRequest(ctx context.Context) *http.Request {
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return contextValue[*http.Request](ctx, contextKeyHTTPRequest)
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}
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func ContextHTTPClient(ctx context.Context) *http.Client {
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return contextValue[*http.Client](ctx, contextKeyHTTPClient)
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}
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func contextValue[T any](ctx context.Context, key any) T {
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value, ok := ctx.Value(key).(T)
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if !ok {
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panic(errors.Errorf("could not find key '%v' on context", key))
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}
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return value
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}
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