diff options
Diffstat (limited to 'Godeps/_workspace/src/github.com/rs/xhandler/chain.go')
-rw-r--r-- | Godeps/_workspace/src/github.com/rs/xhandler/chain.go | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/Godeps/_workspace/src/github.com/rs/xhandler/chain.go b/Godeps/_workspace/src/github.com/rs/xhandler/chain.go deleted file mode 100644 index 042274d17..000000000 --- a/Godeps/_workspace/src/github.com/rs/xhandler/chain.go +++ /dev/null @@ -1,93 +0,0 @@ -package xhandler - -import ( - "net/http" - - "golang.org/x/net/context" -) - -// Chain is an helper to chain middleware handlers together for an easier -// management. -type Chain []func(next HandlerC) HandlerC - -// UseC appends a context-aware handler to the middleware chain. -func (c *Chain) UseC(f func(next HandlerC) HandlerC) { - *c = append(*c, f) -} - -// Use appends a standard http.Handler to the middleware chain without -// lossing track of the context when inserted between two context aware handlers. -// -// Caveat: the f function will be called on each request so you are better to put -// any initialization sequence outside of this function. -func (c *Chain) Use(f func(next http.Handler) http.Handler) { - xf := func(next HandlerC) HandlerC { - return HandlerFuncC(func(ctx context.Context, w http.ResponseWriter, r *http.Request) { - n := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { - next.ServeHTTPC(ctx, w, r) - }) - f(n).ServeHTTP(w, r) - }) - } - *c = append(*c, xf) -} - -// Handler wraps the provided final handler with all the middleware appended to -// the chain and return a new standard http.Handler instance. -// The context.Background() context is injected automatically. -func (c Chain) Handler(xh HandlerC) http.Handler { - ctx := context.Background() - return c.HandlerCtx(ctx, xh) -} - -// HandlerFC is an helper to provide a function (HandlerFuncC) to Handler(). -// -// HandlerFC is equivalent to: -// c.Handler(xhandler.HandlerFuncC(xhc)) -func (c Chain) HandlerFC(xhf HandlerFuncC) http.Handler { - ctx := context.Background() - return c.HandlerCtx(ctx, HandlerFuncC(xhf)) -} - -// HandlerH is an helper to provide a standard http handler (http.HandlerFunc) -// to Handler(). Your final handler won't have access the context though. -func (c Chain) HandlerH(h http.Handler) http.Handler { - ctx := context.Background() - return c.HandlerCtx(ctx, HandlerFuncC(func(ctx context.Context, w http.ResponseWriter, r *http.Request) { - h.ServeHTTP(w, r) - })) -} - -// HandlerF is an helper to provide a standard http handler function -// (http.HandlerFunc) to Handler(). Your final handler won't have access -// the context though. -func (c Chain) HandlerF(hf http.HandlerFunc) http.Handler { - ctx := context.Background() - return c.HandlerCtx(ctx, HandlerFuncC(func(ctx context.Context, w http.ResponseWriter, r *http.Request) { - hf(w, r) - })) -} - -// HandlerCtx wraps the provided final handler with all the middleware appended to -// the chain and return a new standard http.Handler instance. -func (c Chain) HandlerCtx(ctx context.Context, xh HandlerC) http.Handler { - return New(ctx, c.HandlerC(xh)) -} - -// HandlerC wraps the provided final handler with all the middleware appended to -// the chain and returns a HandlerC instance. -func (c Chain) HandlerC(xh HandlerC) HandlerC { - for i := len(c) - 1; i >= 0; i-- { - xh = c[i](xh) - } - return xh -} - -// HandlerCF wraps the provided final handler func with all the middleware appended to -// the chain and returns a HandlerC instance. -// -// HandlerCF is equivalent to: -// c.HandlerC(xhandler.HandlerFuncC(xhc)) -func (c Chain) HandlerCF(xhc HandlerFuncC) HandlerC { - return c.HandlerC(HandlerFuncC(xhc)) -} |