[英]Gatling: execute a check on some JSON hidden inside an HTML response
在加特林,我想對HTML響應中包含的一些JSON進行檢查,如下所示:
<!doctype html>
<html lang="fr">
<head>
<script>
var documentLoaded = performance.now();
</script>
<link rel="stylesheet" href="/styles/main.f14d8fab5a7e.css">
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png">
<link rel="manifest" href="/manifest.json">
<link rel="preconnect" href="https://www.gstatic.com">
<title data-react-helmet="true">Asus Discount</title>
<meta data-react-helmet="true" name="description" content="Asus discount”/><meta data-react-helmet="true" name="keywords" content="Asus"/>
</head>
<body>
<div>Some content</div>
<script>
var parseStart = performance.now();
</script>
<script>
window.__INITIAL_STATE__ = {some JSON}; <!-- This is what I need -->
window.__ENV_VARIABLES__ = {some other JSON};
window.renderTime = '76';
window.fetchTime = '349';
</script>
<script type="text/javascript" charset="utf-8" src="/vendor.e33d9940372.js"></script>
<script type="application/ld+json" src="/schema.fr.json"></script>
</body>
</html>
我的實際解決方案(正在運行)如下所示:
def loadPageJsonInHTML(requestName: String, link: String): ChainBuilder ={
exec(
http(requestName)
.get(link)
.check(regex("""window[.]__INITIAL_STATE__ = ([^;]+)""").find.transform(s => parseSToProdList(s)).saveAs("prod_list")
)
)
doIf("${prod_list.size()}" == 0){
exec{session => session.markAsFailed}
}
}
def parseSToProdList(jsonString: String): Seq[String] ={
val jsonMap = jsonStrToMap(jsonString)
val buffer = mutable.Buffer.empty[String]
jsonMap("products").asInstanceOf[Map[String, Any]].foreach{f =>
if(f._2.asInstanceOf[Map[String, Any]].keySet.exists(_ == "code"))
buffer.append(f._2.asInstanceOf[Map[String, Any]]("code").asInstanceOf[String])
}
buffer.toSeq
}
def jsonStrToMap(jsonStr: String): Map[String, Any] = {
implicit val formats = org.json4s.DefaultFormats
parse(jsonStr).extract[Map[String, Any]]
}
但是,這種解決方案有幾個缺點:
我想要實現的是看起來像這樣的東西:
def loadPageJsonInHTML(requestName: String, link: String): ChainBuilder ={
exec(
http(requestName)
.get(link)
.check(jsonPath("""$.products.*.code""").findAll.saveAs("prod_list")
)
要么
def loadPageJsonInHTML(requestName: String, link: String): ChainBuilder ={
exec(
http(requestName)
.get(link)
.check(jsonpJsonPath("""$.products.*.code""").findAll.saveAs("prod_list")
)
當然,jsonPath不起作用,因為大部分答案都是HTML。 jsonpJsonPath不起作用,因為響應中有幾個Json字符串。
關於如何在避免某些HTML上的正則表達式的同時更好地(並且很好地)做到這一點的任何好的輸入? 提前致謝
因此,經過一些挖掘后,我找到了一個使用“.transformResponse”的解決方法,以便在實際檢查之前提取字符串,為其提供一個可在Json中解析的默認值。 然后,為了確保我們確實找到了正則表達式,我們確保它不是我們的默認值:
def loadPageJsonInHTML(requestName: String, link: String): ChainBuilder = {
exec(
http(requestName)
.get(link)
.transformResponse{(session, response) =>
response.copy(body = new StringResponseBody(
(for(m <- """window[.]__INITIAL_STATE__ = ([^;]+)""".r
.findFirstMatchIn(response.body.string)
) yield m.group(1)
).getOrElse("""{"error":"chain not found"}"""),
UTF_8
)
)
}
.check(bodyString.not("""{"error":"chain not found"}"""))
.check(jsonPath("""$.products.*.code""").findAll.saveAs("prod_list")
)
)
}
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