fix(interceptor): Intercept responses, fix URI encoding

Closes issues #4 & #5

demo/demo.component.ts

@@ -6,7 +6,7 @@ import {DemoService, Post} from './demo.service';
   template: `
     <h3>Sample Posts</h3>
 
-    <form (ngSubmit)="onSubmit()" *ngIf="!isLoading">
+    <form (ngSubmit)="onSubmit()" *ngIf="!isLoading" style="margin-bottom: 10px">
       <div class="form-group">
         <label for="userId">User ID</label>
         <input type="text" class="form-control" id="userId" name="userId" placeholder="User ID" [(ngModel)]="demoPost.userId">
@@ -22,6 +22,8 @@ import {DemoService, Post} from './demo.service';
       <button type="submit" class="btn btn-primary">Create</button>
     </form>
 
+    <button class="btn btn-info" (click)="onGetUserPosts()">Get User {{demoPost.userId}} posts</button>
+
     <table class="table table-hover">
       <thead>
         <tr><th>#</th><th>User</th><th>Title</th><th>Body</th></tr>
@@ -58,4 +60,12 @@ export class Demo implements OnInit {
       this.demoPost = new Post(1, 'Demo Post', 'Lorem Ipsum');
     })
   }
+
+  onGetUserPosts() {
+    this.isLoading = true
+    this.service.getPosts(this.demoPost.userId).subscribe(posts => {
+      this.isLoading = false
+      this.posts = posts
+    })
+  }
 }

demo/demo.service.ts

@@ -22,8 +22,12 @@ export class DemoService extends RESTClient {
   }
 
   @GET('/posts')
-  @Produces<Post[]>()
-  public getPosts(@Query('userId') userId?: number): Observable<Post[]> {
+  @Produces<Post[]>((res: Response) => {
+    res.headers.forEach((values: string[], name: string) => {
+      console.log(name, '=', values)
+    })
+  })
+  public getPosts(@Query('$userId') userId?: number): Observable<Post[]> {
     return null;
   }
 

demo/index.html

@@ -20,7 +20,7 @@
     <nav class="navbar navbar-default" role="navigation">
       <div class="container-fluid">
         <div class="navbar-header">
-          <a class="navbar-brand" href="#">ng2-http</a>
+          <a class="navbar-brand" href="https://www.npmjs.com/package/ng2-http">ng2-http</a>
         </div>
         <ul class="nav navbar-nav hidden-xs">
           <li><a href="#demo">Demo</a></li>

dist/esm/src/rest.service.d.ts

@@ -46,7 +46,7 @@ export declare function Headers(headersDef: any): (target: RESTClient, propertyK
 /**
  * Defines the type(s) that the responses can produce
  */
-export declare function Produces<T>(): (target: RESTClient, propertyKey: string, descriptor: any) => any;
+export declare function Produces<T>(interceptor?: (res: Response) => void): (target: RESTClient, propertyKey: string, descriptor: any) => any;
 /**
  * Path variable of a method's url, type: string
  * @param {string} key - path key to bind value