public static void main(String[] args) throws IOException {
port(8080);
Configuration config = new Configuration(Configuration.VERSION_2_3_26);
config.setDirectoryForTemplateLoading(new File("PATH_NAME"));
get("/test", (req,res) ->{
StringWriter writer = new StringWriter();
Template temp = config.getTemplate("loginform.ftl");
temp.process(null, writer);
return writer;
});
post("/select", (req,res) -> {
String city = req.queryParams("city");
String state = req.queryParams("state");
Map<String, Object> data = new HashMap<>();
data.put("Hello", "Your not null!");
StringWriter writer = new StringWriter();
Template temp = config.getTemplate("result.ftl");
temp.process(data, writer);
return writer;
});
}
Above is the main method to the Spark application i am developing. It involves two templates, loginform.ftl and result.ftl. Loginform.ftl is a simple html form that sends a post request to the server which handled by the post handler in the code above. When I fill out the form and send the request, i get a 500 internal server error. The error relates to the result.ftl which, right now, i am using to test template making. I am passing a HashMap to the result.ftl template. The error i get is:
FreeMarker template error:
The following has evaluated to null or missing:
==> data [in template "result.ftl" at line 2, column 8]
FTL stack trace ("~" means nesting-related):
- Failed at: #list data as key, value [in template "result.ftl" at line
2, column 1]
----
I took this to mean that data was null when the template was being generated , but it very clearly isn't. I have no idea this is happening. My template files are below.
loginform.ftl
<form action= "/select" method= "POST" accept-charset="utf-8">
City Name: <input type= "text" name = "city">
State(2 letter format):<input type= "text" name = "state">
<input type= "submit" id = "submitButton">
</form>
result.ftl
<html>
<#list data as key, value>
${key} = ${value};
</#list>
</html>
