Add example for JSON-RPC returning an error object

A real object could be used as well as a string here, but jsolait as bundled stringifies the object when it raises a JSONRPCError exception.
erlyaws · Nov 9, 2009 · af707a9 · af707a9
1 parent 908fea6
commit af707a9
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Showing 2 changed files with 23 additions and 1 deletion.
diff --git a/www/json_sample.html b/www/json_sample.html
@@ -6,7 +6,7 @@
   <script>
 
 var serviceURL = "json_sample.yaws";
-var methods = [ "test1" ];
+var methods = [ "test1", "errortest" ];
 
 var jsonrpc = imprt("jsonrpc");
 var service = new jsonrpc.ServiceProxy(serviceURL, methods);
@@ -23,6 +23,17 @@
      return false;
 }
 
+function errortest() {
+    try {
+     document.getElementById('failure').innerHTML = 
+       "<PRE>" + service.errortest() + "</PRE>";
+     } catch(e) {
+     document.getElementById('failure').innerHTML = 
+        "<PRE>" + e + "</PRE>";
+     } 
+     return false;
+}
+
   </script>
   <body>
     <form action="" method="post" onSubmit="return test()">
@@ -38,5 +49,12 @@
         <input type="submit" value="Do JSON-RPC call"/>
       </p>
     </form>
+    <form action="" method="post" onSubmit="return errortest()">
+      <p>
+        <input type="submit" value="Do JSON-RPC call expected to fail"/>
+      </p>
+      <div id="failure">
+      </div>
+    </form>
   </body>
 </html>
diff --git a/www/json_sample.yaws b/www/json_sample.yaws
@@ -16,6 +16,10 @@ out(A) ->
 
 
 
+counter([{ip, IP}] = _State, {call, errortest, Value} = _Request, Session) ->  
+    io:format("Request = ~p~n", [_Request]),
+    { false, { error, "Expected failure" } };
+
 counter([{ip, IP}] = _State, {call, test1, Value} = _Request, Session) ->  
     io:format("Request = ~p~n", [_Request]),
     IPStr = io_lib:format("Client ip is  ~p~n" , [ IP ]),