An error occurred while processing the template. 
Java method "com.liferay.portal.json.JSONFactoryImpl.createJSONObject(String)" threw an exception when invoked on com.liferay.portal.json.JSONFactoryImpl object "com.liferay.portal.json.JSONFactoryImpl@2ad66ae2"; see cause exception in the Java stack trace.

----
FTL stack trace ("~" means nesting-related):
	- Failed at: navigationJSONObject = jsonFactoryUti...  [in template "17855804202317#32484267#LEARN-ARTICLE-NAV" at line 4, column 9]
----
1<#assign 
2	groupFriendlyURL = themeDisplay.getScopeGroup().getFriendlyURL() 
3	groupPathFriendlyURLPublic = themeDisplay.getPathFriendlyURLPublic() + groupFriendlyURL 
4	navigationJSONObject = jsonFactoryUtil.createJSONObject(navigation.getData()) 
5	navigationMenuItems = 
6		{ 
7			"Analytics Cloud": { 
8				"image": "/documents/d${groupFriendlyURL}/analytics_c-svg", 
9				"title": "Analytics Cloud", 
10				"url": "analytics-cloud" 
11			}, 
12			"Commerce": { 
13				"image": "/documents/d${groupFriendlyURL}/commerce_product-svg", 
14				"title": "Commerce", 
15				"url": "commerce" 
16			}, 
17			"DXP": { 
18				"image": "/documents/d${groupFriendlyURL}/dxp_p-svg", 
19				"title": "DXP / Portal", 
20				"url": "dxp" 
21			}, 
22			"Liferay Cloud": { 
23				"image": "/documents/d${groupFriendlyURL}/dxp_c-svg", 
24				"title": "Liferay Cloud", 
25				"url": "liferay-cloud" 
26			}, 
27			"Reference": { 
28				"image": "/documents/d${groupFriendlyURL}/reference-svg", 
29				"title": "Reference", 
30				"url": "reference" 
31			} 
32		} 
33 
34	breadcrumbJSONArray = navigationJSONObject.getJSONArray("breadcrumb") 
35	childrenJSONArray = navigationJSONObject.getJSONArray("children") 
36	parentJSONObject = navigationJSONObject.getJSONObject("parent") 
37	productJSONObject = breadcrumbJSONArray.getJSONObject(breadcrumbJSONArray.length()-1)!navigationJSONObject.getJSONObject("self") 
38	siblingsJSONArray = navigationJSONObject.getJSONArray("siblings") 
39/> 
40 
41<div class="learn-article-nav"> 
42	<#if productJSONObject?has_content && productJSONObject.getString("title")?has_content && navigationMenuItems[productJSONObject.getString("title")]?has_content && navigationMenuItems[productJSONObject.getString("title")].title?has_content> 
43		<div 
44			class="dropdown learn-article-nav-root learn-dropdown" 
45		> 
46			<div class="learn-article-nav-item"> 
47				<div class="d-flex"> 
48					<div class="learn-article-nav-image"> 
49						<img 
50							class="lexicon-icon lexicon-icon-caret-bottom product-icon" 
51							role="presentation" 
52							src='${navigationMenuItems[productJSONObject.getString("title")].image}' 
53							viewBox="0 0 512 512" 
54						/> 
55					</div> 
56 
57					<span class="learn-article-nav-text">${navigationMenuItems[productJSONObject.getString("title")].title}</span> 
58				</div> 
59 
60				<div id="dropdown-icon"> 
61					<svg 
62						class="lexicon-icon lexicon-icon-caret-bottom" 
63						role="presentation" 
64						viewBox="0 0 512 512" 
65					> 
66						<use xlink:href="/o/admin-theme/images/clay/icons.svg#caret-bottom"></use> 
67					</svg> 
68				</div> 
69			</div> 
70 
71			<ul class="dropdown-menu learn-dropdown-menu"> 
72				<#list navigationMenuItems as key, value> 
73					<li> 
74						<a 
75							class="dropdown-item learn-article-nav-item" 
76							href="/w/${navigationMenuItems[key].url}/index" 
77							tabindex="4" 
78						> 
79							<span class="d-flex"> 
80								<span class="learn-article-nav-image"> 
81									<img 
82										class="lexicon-icon lexicon-icon-caret-bottom product-icon mt-0 mr-2" 
83										role="presentation" 
84										src="${value.image}"height: 25px; margin-left: 5px; max-width: none; width: 25px; 
85										viewBox="0 0 512 512" 
86									/> 
87								</span> 
88								<span class="learn-article-nav-text">${value.title}</span> 
89							</span> 
90 
91							<#if navigationMenuItems[productJSONObject.getString("title")].url == value.url> 
92								<span> 
93									<@clay["icon"] symbol="check" /> 
94								</span> 
95							</#if> 
96						</a> 
97					</li> 
98				</#list> 
99			</ul> 
100		</div> 
101	</#if> 
102 
103	<div class="learn-article-nav-content"> 
104		<#if parentJSONObject?has_content && parentJSONObject.getString("url")?has_content> 
105			<div class="learn-article-nav-item learn-article-nav-parent liferay-nav-item p-2"> 
106				<div class="mr-2"> 
107					<a 
108						href='${parentJSONObject.getString("url")}' 
109					> 
110						<svg 
111							class="lexicon-icon lexicon-icon-angle-left" 
112							role="presentation" 
113							viewBox="0 0 512 512" 
114						> 
115							<use xlink:href="/o/admin-theme/images/clay/icons.svg#angle-left"></use> 
116						</svg> 
117					</a> 
118				</div> 
119 
120				<span>${parentJSONObject.getString("title")}</span> 
121			</div> 
122		</#if> 
123 
124		<#if childrenJSONArray.length() gt 0> 
125			<ul class="m-0 p-2"> 
126				<#list 0..childrenJSONArray.length()-1 as i> 
127					<li class="learn-article-nav-item"> 
128						<a 
129							class='liferay-nav-item ${(navigationJSONObject.getJSONObject("self").url == childrenJSONArray.getJSONObject(i).url)?then("selected", "")}' 
130							href="${childrenJSONArray.getJSONObject(i).url}" 
131						> 
132							<span>${childrenJSONArray.getJSONObject(i).getString("title")}</span> 
133						</a> 
134					</li> 
135				</#list> 
136			</ul> 
137		<#elseif siblingsJSONArray.length() gt 0> 
138			<ul class="m-0 p-2"> 
139				<#list 0..siblingsJSONArray.length()-1 as i> 
140					<li class="learn-article-nav-item"> 
141						<a 
142							class='liferay-nav-item ${(navigationJSONObject.getJSONObject("self").url == siblingsJSONArray.getJSONObject(i).url)?then("selected", "")}' 
143							href="${siblingsJSONArray.getJSONObject(i).url}" 
144						> 
145							<span>${siblingsJSONArray.getJSONObject(i).getString("title")}</span> 
146						</a> 
147					</li> 
148				</#list> 
149			</ul> 
150		</#if> 
151	</div> 
152</div> 
Submit Feedback

Authorizing with OAuth2

Use Liferay’s OAuth2 tools to authorize third-party applications to access data. For example, a Clarity Vision Solutions’ partner wants to sell the eyewear products with up-to-date pricing. They request Clarity Vision Solutions to provide access to the price list API. Follow the steps below to see this in action.

Setting Up OAuth2

  1. Open the _Global Menu* (Global Menu) and navigate to Control Panel → Security → OAuth 2 Administration.

  2. Click Add (Add Icon) to create a new OAuth2 application.

  3. Give the application a name (e.g., foo). Set the Website URL as http://localhost:3000 and the Callback URI as http://localhost:3000/grant-type-authorization-code. Click Save.

  4. Copy the Client ID and Client Secret to your clipboard. To get the Client Secret click Edit. Copy the value from the pop-up window. These values are needed later in the sample React app.

  5. Click the Scopes tab at the top of the page. Scroll down, click LIFERAY.HEADLESS.COMMERCE.ADMIN.PRICING, then check the box for read data on your behalf.

    Enable read privileges for LIFERAY.HEADLESS.COMMERCE.ADMIN.PRICING.

    Click Save. Your OAuth2 Application now has read privileges for the commerce pricing API category.

  6. Next, open the Global Menu (Global Menu), click the Control Panel tab, and go to System Settings → Security Tools.

  7. Go to the Portal Cross-Origin Resource Sharing (CORS) tab and click Default Portal CORS Configuration.

  8. Add a URL Pattern with the value /o/headless-commerce-admin-pricing/* and click Save. This enables CORS for the headless-commerce-admin-pricing category of APIs.

Deploy the Sample React App

  1. Download and unzip the OAuth2 React App.

    curl https://resources.learn.liferay.com/dxp/latest/en/headless-delivery/using-oauth2/liferay-c2b6.zip -O

    unzip liferay-c2b6.zip

    cd liferay-c2b6

  2. Verify that node and yarn are installed. If not, run the setup script and follow the prompts:

    ./setup_tutorial.sh

  3. Navigate into the app’s root directory and start the React server.

    cd c2b6-custom-element

    yarn install && yarn start

  4. Open the React app running at http://localhost:3000. Click Authorization Code Flow.

  5. Enter http://localhost:8080/o/oauth2/authorize for the Liferay authorize URL. Paste the client ID from your clipboard. Click Authorize.

  6. If you’re not already logged in, you are redirected to the Liferay login page before being sent to the authorization page. Enter your username and password (e.g. test@liferay.com:learn) and click Sign In. On the authorization page, click Authorize. If you are already logged in, you are sent directly to the authorization page.

  7. Enter http://localhost:8080/o/oauth2/token for the Liferay token URL. Paste the client ID and client secret from your clipboard. Click Get Token.

  8. Enter http://localhost:8080/o/headless-commerce-admin-pricing/v1.0/priceLists for the request URL. Click Get Data.

    The price list is displayed in the React app.

Next: Managing AntiSamy

Relevant Concepts