add force rewrite support. Closes #181

Author: tj

docs/configuration.md

@@ -362,6 +362,22 @@ A common use-case for rewrites is for SPAs or Single Page Apps, where you want t
 }
 ```
 
+If you wish to force the rewrite regardless of a file existing, set `force` to `true` as shown here:
+
+```json
+{
+  "name": "app",
+  "type": "static",
+  "redirects": {
+    "/*": {
+      "location": "/",
+      "status": 200,
+      "force": true
+    }
+  }
+}
+```
+
 Note that more specific target paths take precedence over those which are less specific, for example `/blog` will win over and `/*`.
 
 ## Cross-Origin Resource Sharing

http/redirects/redirects.go

@@ -72,6 +72,15 @@ func New(c *up.Config, next http.Handler) (http.Handler, error) {
 			return
 		}
 
+		// forced rewrite
+		if rule.IsRewrite() && rule.Force {
+			ctx.WithField("dest", r.URL.Path).Info("forced rewrite")
+			r.Header.Set("X-Original-Path", r.URL.Path)
+			r.URL.Path = rule.URL(r.URL.Path)
+			next.ServeHTTP(w, r)
+			return
+		}
+
 		// rewrite
 		if rule.IsRewrite() {
 			res := &rewrite{ResponseWriter: w}

http/redirects/redirects_test.go

@@ -49,6 +49,11 @@ func TestRedirects(t *testing.T) {
 					Location: "/products/:brand",
 					Status:   301,
 				},
+				"/settings/*": {
+					Location: "/admin/:splat",
+					Status:   200,
+					Force:    true,
+				},
 			},
 		}
 
@@ -62,8 +67,12 @@ func TestRedirects(t *testing.T) {
 				fmt.Fprintln(w, "products")
 			case strings.Contains(r.URL.Path, "/docs"):
 				fmt.Fprintf(w, "docs %s", r.URL.Path)
-			case strings.Contains(r.URL.Path, "/brand"):
+			case strings.HasPrefix(r.URL.Path, "/brand"):
 				fmt.Fprintf(w, "shop %s", r.URL.Path)
+			case strings.HasPrefix(r.URL.Path, "/setting"):
+				fmt.Fprintf(w, "settings %s", r.URL.Path)
+			case strings.HasPrefix(r.URL.Path, "/admin"):
+				fmt.Fprintf(w, "admin %s", r.URL.Path)
 			default:
 				http.NotFound(w, r)
 			}
@@ -177,4 +186,14 @@ func test(t *testing.T, h http.Handler) {
 		assert.Equal(t, 301, res.Code)
 		assert.Equal(t, "Moved Permanently\n", res.Body.String())
 	})
+
+	t.Run("forced rewrite", func(t *testing.T) {
+		res := httptest.NewRecorder()
+		req := httptest.NewRequest("GET", "/settings/login", nil)
+
+		h.ServeHTTP(res, req)
+
+		assert.Equal(t, 200, res.Code)
+		assert.Equal(t, "admin /admin/login", res.Body.String())
+	})
 }

internal/redirect/redirect.go

@@ -19,6 +19,7 @@ type Rule struct {
 	Path     string `json:"path"`
 	Location string `json:"location"`
 	Status   int    `json:"status"`
+	Force    bool   `json:"force"`
 	names    map[string]bool
 	dynamic  bool
 	sub      string