added response check for swagger 2.0/1.2 client

dist/lib/swagger-client.js

@@ -184,6 +184,7 @@ var SwaggerClient = function(url, options) {
   this.basePath = null;
   this.authorizations = null;
   this.authorizationScheme = null;
+  this.isValid = false;
   this.info = null;
   this.useJQuery = false;
 
@@ -236,6 +237,11 @@ SwaggerClient.prototype.build = function() {
         if(responseObj.swagger && responseObj.swagger === 2.0) {
           self.swaggerVersion = responseObj.swagger;
           self.buildFromSpec(responseObj);
+          self.isValid = true;
+        }
+        else {
+          self.isValid = false;
+          self.failure()
         }
       }
     }

dist/lib/swagger.js

@@ -99,6 +99,7 @@ var SwaggerApi = function(url, options) {
   this.info = null;
   this.useJQuery = false;
   this.modelsArray = [];
+  this.isValid;
 
   options = (options||{});
   if (url)
@@ -213,6 +214,7 @@ SwaggerApi.prototype.buildFromSpec = function(response) {
       this.apisArray.push(res);
     }
   }
+  this.isValid = true;
   if (this.success) {
     this.success();
   }
@@ -260,6 +262,7 @@ SwaggerApi.prototype.buildFrom1_1Spec = function(response) {
       this.apisArray.push(res);
     }
   }
+  this.isValid = true;
   if (this.success) {
     this.success();
   }

dist/swagger-ui.js

@@ -1258,7 +1258,13 @@ helpers = this.merge(helpers, Handlebars.helpers); data = data || {};
         return _this.showMessage(d);
       };
       this.options.failure = function(d) {
-        return _this.onLoadFailure(d);
+        if (_this.api && _this.api.isValid === false) {
+          log("not a valid 2.0 spec, loading legacy client");
+          _this.api = new SwaggerApi(_this.options);
+          return _this.api.build();
+        } else {
+          return _this.onLoadFailure(d);
+        }
       };
       this.headerView = new HeaderView({
         el: $('#header')
@@ -1284,15 +1290,8 @@ helpers = this.merge(helpers, Handlebars.helpers); data = data || {};
       }
       this.options.url = url;
       this.headerView.update(url);
-      if (url.indexOf('swagger.json') > 0) {
-        this.api = new SwaggerClient(this.options);
-        this.api.build();
-        return this.api;
-      } else {
-        this.api = new SwaggerApi(this.options);
-        this.api.build();
-        return this.api;
-      }
+      this.api = new SwaggerClient(this.options);
+      return this.api.build();
     };
 
     SwaggerUi.prototype.render = function() {