#349 extension: simplehttpclient fix put request, update doc

docs/extensions-howto.md

@@ -55,7 +55,7 @@ function executeScript(scriptEvent) {
     log.warn('hello from script with event: ' + scriptEvent);
     log.warn('extension parameters are: ' + extensionParameters);
     //this sample calls the https://csrng.net/ website and generates a random invoice number
-    var randomNumber = restTemplate.getForObject('https://csrng.net/csrng/csrng.php?min=0&max=100', Java.type('java.util.ArrayList').class)[0].random;
+    var randomNumber = simpleHttpClient.get('https://csrng.net/csrng/csrng.php?min=0&max=100').getJsonBody()[0].random;
     log.warn('the invoice number will be: ' + randomNumber);
     return {
         invoiceNumber: randomNumber
@@ -71,8 +71,8 @@ alf.io provides some objects and properties to the script in the script scope:
 
 * **log** Log4j logger
 * **extensionLogger** a logger that write in the extension_log table. It implement the [ExtensionLogger](https://github.com/alfio-event/alf.io/blob/master/src/main/java/alfio/extension/ExtensionLogger.java) interface.
-* **restTemplate** Spring Framework's [RestTemplate](https://docs.spring.io/spring/docs/4.3.13.RELEASE/javadoc-api/org/springframework/web/client/RestTemplate.html)
 * **httpClient** instance of a [OkHttpClient](http://square.github.io/okhttp/)
+* **simpleHttpClient** instance of a [SimpleHttpClient](https://github.com/alfio-event/alf.io/blob/master/src/main/java/alfio/extension/SimpleHttpClient.java)
 * **GSON** Google's [JSON parser/generator](http://static.javadoc.io/com.google.code.gson/gson/2.8.2/com/google/gson/Gson.html)
 * **returnClass** `java.lang.Class<?>` the expected result type
 * **extensionParameters** a map containing the parameters of an extension

src/main/java/alfio/extension/ScriptingExecutionService.java

@@ -48,7 +48,6 @@
 public class ScriptingExecutionService {
 
     private static final OkHttpClient HTTP_CLIENT = new OkHttpClient();
-    private static final RestTemplate REST_TEMPLATE = new RestTemplate();
     private static final SimpleHttpClient SIMPLE_HTTP_CLIENT = new SimpleHttpClient(HTTP_CLIENT);
 
     private final static Compilable engine = (Compilable) new ScriptEngineManager().getEngineByName("nashorn");
@@ -106,7 +105,6 @@ private static <T> T executeScript(String name, CompiledScript script, Map<Strin
             engineScope.put("log", log);
             engineScope.put("extensionLogger", extensionLogger);
             engineScope.put("GSON", Json.GSON);
-            engineScope.put("restTemplate", REST_TEMPLATE);
             engineScope.put("httpClient", HTTP_CLIENT);
             engineScope.put("simpleHttpClient", SIMPLE_HTTP_CLIENT);
             engineScope.put("returnClass", clazz);

src/main/java/alfio/extension/SimpleHttpClient.java

@@ -89,7 +89,7 @@ public HttpClientResponse put(String url, Map<String, String> headers) throws IO
     }
 
     public HttpClientResponse put(String url, Map<String, String> headers, Object body) throws IOException {
-        return doRequest(url, headers, "POST", body);
+        return doRequest(url, headers, "PUT", body);
     }