POST request with large body received empty on server side - json

Question

When issuing a POST request with a large body to my Play framework action method, I get null when extracting the data. If the body is fairly small, I can retrieve the data just fine.
Here's a sample short data set:
{
"creator": "zoltan",
"sport": "hike",
"geometry": [
{
"time": "2009-07-10 12:56:10 +0000",
"x": 10.275514,
"y": 47.514749,
"z": 756.587
},
{
"time": "2009-07-10 12:56:19 +0000",
"x": 10.275563,
"y": 47.514797,
"z": 757.417
}
]
}
When I issue a POST request with this JSON in the body, everything works fine. However, if I add many more (~4000) points in the geometry array, I get null in the action.
Here's my action method:
#Transactional
//#BodyParser.Of(Json.class) // tried with this as well
public static Result createTour() {
LOG.debug("Raw request body: " + request().body().asText());
JsonNode node = request().body().asJson();
LOG.debug("JSON request body: " + node);
TourDto tourDto;
try {
tourDto = jsonToTour(node);
int id = TourDataAccessUtils.create(tourDto);
return created(toJson(id));
} catch (JsonProcessingException e) {
LOG.error("While parsing JSON request.", e);
return Results.badRequest(
toJson(Throwables.getRootCause(e).getMessage()));
}
}
I tried using both Advanced REST Client in chrome and ċurl to send the request, both failed.
What could be the problem? Could it be that I need to include a Content-Lenght header for large requests? If so, how can I manually calculate it for arbitrary JSON data?

Answer 1

Please check the PlayFramework documentation, They mentionned that the default maximum length for request is 100KB:
Max content length
Text based body parsers (such as text, json, xml or
formUrlEncoded) use a max content length because they have to load all
the content into memory.
There is a default content length (the default is 100KB).
Tip: The default content size can be defined in application.conf:
parsers.text.maxLength=128K
You can also specify a maximum content length via the #BodyParser.Of
annotation:
// Accept only 10KB of data.
#BodyParser.Of(value = BodyParser.Text.class, maxLength = 10 * 1024)
pulic static Result index() {
if(request().body().isMaxSizeExceeded()) {
return badRequest("Too much data!");
} else {
ok("Got body: " + request().body().asText());
}
}