Introduce JsonP support, close #1517

gatling-http/src/main/scala/io/gatling/http/check/HttpCheckSupport.scala

@@ -18,7 +18,7 @@ package io.gatling.http.check
 import io.gatling.core.check.extractor.jsonpath.JsonFilter
 import io.gatling.core.check.extractor.regex.GroupExtractor
 import io.gatling.core.session.Expression
-import io.gatling.http.check.body.{ HttpBodyCssCheckBuilder, HttpBodyJsonPathCheckBuilder, HttpBodyRegexCheckBuilder, HttpBodyStringCheckBuilder, HttpBodyXPathCheckBuilder }
+import io.gatling.http.check.body.{ HttpBodyCssCheckBuilder, HttpBodyJsonPathCheckBuilder, HttpBodyJsonpJsonPathCheckBuilder, HttpBodyRegexCheckBuilder, HttpBodyStringCheckBuilder, HttpBodyXPathCheckBuilder }
 import io.gatling.http.check.checksum.HttpChecksumCheckBuilder
 import io.gatling.http.check.header.{ HttpHeaderCheckBuilder, HttpHeaderRegexCheckBuilder }
 import io.gatling.http.check.status.HttpStatusCheckBuilder
@@ -37,6 +37,8 @@ trait HttpCheckSupport {
 
 	val jsonPath = jsonPathTyped[String] _
 	def jsonPathTyped[T](path: Expression[String])(implicit groupExtractor: JsonFilter[T]) = HttpBodyJsonPathCheckBuilder.jsonPath[T](path)
+	val jsonpJsonPath = jsonpJsonPathTyped[String] _
+	def jsonpJsonPathTyped[T](regex: String, path: Expression[String])(implicit groupExtractor: JsonFilter[T]) = HttpBodyJsonpJsonPathCheckBuilder.jsonpJsonPath[T](regex, path)
 
 	val bodyString = HttpBodyStringCheckBuilder.bodyString
 

gatling-http/src/main/scala/io/gatling/http/check/body/HttpBodyJsonpJsonPathCheckBuilder.scala

@@ -0,0 +1,57 @@
+/**
+ * Copyright 2011-2013 eBusiness Information, Groupe Excilys (www.ebusinessinformation.fr)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * 		http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.gatling.http.check.body
+
+import com.typesafe.scalalogging.slf4j.Logging
+
+import io.gatling.core.check.Preparer
+import io.gatling.core.check.extractor.jsonpath.{ CountJsonPathExtractor, JsonFilter, JsonPathExtractor, MultipleJsonPathExtractor, SingleJsonPathExtractor }
+import io.gatling.core.config.GatlingConfiguration.configuration
+import io.gatling.core.session.Expression
+import io.gatling.core.validation.{ FailureWrapper, SuccessWrapper }
+import io.gatling.http.check.{ HttpCheckBuilders, HttpMultipleCheckBuilder }
+import io.gatling.http.response.Response
+
+case class JsonpPreparer(regex: String) extends Preparer[Response, Any] with Logging {
+
+	def apply(response: Response) =
+		try {
+			val bodyString = response.getResponseBody(configuration.core.encoding)
+			bodyString match {
+				case regex.r(jsonp) => JsonPathExtractor.parse(jsonp).success
+				case _ =>
+					val message = s"Regex $regex could not extract JSON object from JSONP response"
+					logger.info(message)
+					message.failure
+			}
+
+		} catch {
+			case e: Exception =>
+				val message = s"Could not extract JSON object from JSONP response : ${e.getMessage}"
+				logger.info(message, e)
+				message.failure
+		}
+}
+
+object HttpBodyJsonpJsonPathCheckBuilder extends Logging {
+
+	def jsonpJsonPath[X](regex: String, path: Expression[String])(implicit groupExtractor: JsonFilter[X]) =
+		new HttpMultipleCheckBuilder[Any, X](HttpCheckBuilders.bodyCheckFactory, JsonpPreparer(regex)) {
+			def findExtractor(occurrence: Int) = new SingleJsonPathExtractor(path, occurrence)
+			def findAllExtractor = new MultipleJsonPathExtractor(path)
+			def countExtractor = new CountJsonPathExtractor(path)
+		}
+}