Updating dependencies.

vendor/github.com/rs/cors/README.md

@@ -68,6 +68,7 @@ Please refer to [#55](https://github.com/rs/cors/issues/55) for more information
 * [Gorilla](http://www.gorillatoolkit.org/pkg/mux): [examples/gorilla/server.go](https://github.com/rs/cors/blob/master/examples/gorilla/server.go)
 * [Buffalo](https://gobuffalo.io): [examples/buffalo/server.go](https://github.com/rs/cors/blob/master/examples/buffalo/server.go)
 * [Gin](https://gin-gonic.github.io/gin): [examples/gin/server.go](https://github.com/rs/cors/blob/master/examples/gin/server.go)
+* [Chi](https://github.com/go-chi/chi): [examples/chi/server.go](https://github.com/rs/cors/blob/master/examples/chi/server.go)
 
 ## Parameters
 
@@ -86,7 +87,8 @@ handler = c.Handler(handler)
 ```
 
 * **AllowedOrigins** `[]string`: A list of origins a cross-domain request can be executed from. If the special `*` value is present in the list, all origins will be allowed. An origin may contain a wildcard (`*`) to replace 0 or more characters (i.e.: `http://*.domain.com`). Usage of wildcards implies a small performance penality. Only one wildcard can be used per origin. The default value is `*`.
-* **AllowOriginFunc** `func (origin string) bool`: A custom function to validate the origin. It take the origin as argument and returns true if allowed or false otherwise. If this option is set, the content of `AllowedOrigins` is ignored
+* **AllowOriginFunc** `func (origin string) bool`: A custom function to validate the origin. It takes the origin as an argument and returns true if allowed, or false otherwise. If this option is set, the content of `AllowedOrigins` is ignored.
+* **AllowOriginRequestFunc** `func (r *http.Request origin string) bool`: A custom function to validate the origin. It takes the HTTP Request object and the origin as argument and returns true if allowed or false otherwise. If this option is set, the content of `AllowedOrigins` and `AllowOriginFunc` is ignored
 * **AllowedMethods** `[]string`: A list of methods the client is allowed to use with cross-domain requests. Default value is simple methods (`GET` and `POST`).
 * **AllowedHeaders** `[]string`: A list of non simple headers the client is allowed to use with cross-domain requests.
 * **ExposedHeaders** `[]string`: Indicates which headers are safe to expose to the API of a CORS API specification

vendor/github.com/rs/cors/cors.go

@@ -41,6 +41,10 @@ type Options struct {
 	// as argument and returns true if allowed or false otherwise. If this option is
 	// set, the content of AllowedOrigins is ignored.
 	AllowOriginFunc func(origin string) bool
+	// AllowOriginFunc is a custom function to validate the origin. It takes the HTTP Request object and the origin as
+	// argument and returns true if allowed or false otherwise. If this option is set, the content of `AllowedOrigins`
+	// and `AllowOriginFunc` is ignored.
+	AllowOriginRequestFunc func(r *http.Request, origin string) bool
 	// AllowedMethods is a list of methods the client is allowed to use with
 	// cross-domain requests. Default value is simple methods (HEAD, GET and POST).
 	AllowedMethods []string
@@ -75,6 +79,8 @@ type Cors struct {
 	allowedWOrigins []wildcard
 	// Optional origin validator function
 	allowOriginFunc func(origin string) bool
+	// Optional origin validator (with request) function
+	allowOriginRequestFunc func(r *http.Request, origin string) bool
 	// Normalized list of allowed headers
 	allowedHeaders []string
 	// Normalized list of allowed methods
@@ -93,11 +99,12 @@ type Cors struct {
 // New creates a new Cors handler with the provided options.
 func New(options Options) *Cors {
 	c := &Cors{
-		exposedHeaders:    convert(options.ExposedHeaders, http.CanonicalHeaderKey),
-		allowOriginFunc:   options.AllowOriginFunc,
-		allowCredentials:  options.AllowCredentials,
-		maxAge:            options.MaxAge,
-		optionPassthrough: options.OptionsPassthrough,
+		exposedHeaders:         convert(options.ExposedHeaders, http.CanonicalHeaderKey),
+		allowOriginFunc:        options.AllowOriginFunc,
+		allowOriginRequestFunc: options.AllowOriginRequestFunc,
+		allowCredentials:       options.AllowCredentials,
+		maxAge:                 options.MaxAge,
+		optionPassthrough:      options.OptionsPassthrough,
 	}
 	if options.Debug {
 		c.Log = log.New(os.Stdout, "[cors] ", log.LstdFlags)
@@ -109,7 +116,7 @@ func New(options Options) *Cors {
 
 	// Allowed Origins
 	if len(options.AllowedOrigins) == 0 {
-		if options.AllowOriginFunc == nil {
+		if options.AllowOriginFunc == nil && options.AllowOriginRequestFunc == nil {
 			// Default is all origins
 			c.allowedOriginsAll = true
 		}
@@ -254,7 +261,7 @@ func (c *Cors) handlePreflight(w http.ResponseWriter, r *http.Request) {
 		c.logf("  Preflight aborted: empty origin")
 		return
 	}
-	if !c.isOriginAllowed(origin) {
+	if !c.isOriginAllowed(r, origin) {
 		c.logf("  Preflight aborted: origin '%s' not allowed", origin)
 		return
 	}
@@ -307,7 +314,7 @@ func (c *Cors) handleActualRequest(w http.ResponseWriter, r *http.Request) {
 		c.logf("  Actual request no headers added: missing origin")
 		return
 	}
-	if !c.isOriginAllowed(origin) {
+	if !c.isOriginAllowed(r, origin) {
 		c.logf("  Actual request no headers added: origin '%s' not allowed", origin)
 		return
 	}
@@ -344,7 +351,10 @@ func (c *Cors) logf(format string, a ...interface{}) {
 
 // isOriginAllowed checks if a given origin is allowed to perform cross-domain requests
 // on the endpoint
-func (c *Cors) isOriginAllowed(origin string) bool {
+func (c *Cors) isOriginAllowed(r *http.Request, origin string) bool {
+	if c.allowOriginRequestFunc != nil {
+		return c.allowOriginRequestFunc(r, origin)
+	}
 	if c.allowOriginFunc != nil {
 		return c.allowOriginFunc(origin)
 	}

vendor/github.com/rs/cors/utils.go

@@ -39,19 +39,20 @@ func parseHeaderList(headerList string) []string {
 	headers := make([]string, 0, t)
 	for i := 0; i < l; i++ {
 		b := headerList[i]
-		if b >= 'a' && b <= 'z' {
+		switch {
+		case b >= 'a' && b <= 'z':
 			if upper {
 				h = append(h, b-toLower)
 			} else {
 				h = append(h, b)
 			}
-		} else if b >= 'A' && b <= 'Z' {
+		case b >= 'A' && b <= 'Z':
 			if !upper {
 				h = append(h, b+toLower)
 			} else {
 				h = append(h, b)
 			}
-		} else if b == '-' || b == '_' || (b >= '0' && b <= '9') {
+		case b == '-' || b == '_' || (b >= '0' && b <= '9'):
 			h = append(h, b)
 		}