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stream response, bypassing the string step

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This commit is contained in:
Jeremie Panzer
2013-03-26 10:20:23 +01:00
parent c57af70cbd
commit 8f1061a8b2
1 changed files with 35 additions and 7 deletions
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42
src/main/java/com/commafeed/frontend/rest/JSONMessageBodyReaderWriter.java
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@@ -2,7 +2,9 @@ package com.commafeed.frontend.rest;
import java.io.IOException; import java.io.IOException;
import java.io.InputStream; import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream; import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.lang.annotation.Annotation; import java.lang.annotation.Annotation;
import java.lang.reflect.Type; import java.lang.reflect.Type;
import java.text.SimpleDateFormat; import java.text.SimpleDateFormat;
@@ -19,7 +21,6 @@ import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter; import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider; import javax.ws.rs.ext.Provider;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.time.DateUtils; import org.apache.commons.lang.time.DateUtils;
import com.google.gson.Gson; import com.google.gson.Gson;
@@ -35,6 +36,10 @@ import com.google.gson.JsonSerializer;
public class JSONMessageBodyReaderWriter implements MessageBodyWriter<Object>, public class JSONMessageBodyReaderWriter implements MessageBodyWriter<Object>,
MessageBodyReader<Object> { MessageBodyReader<Object> {
private static final String UTF_8 = "UTF-8";
private Gson gson;
@Override @Override
public boolean isWriteable(Class<?> type, Type genericType, public boolean isWriteable(Class<?> type, Type genericType,
Annotation[] annotations, MediaType mediaType) { Annotation[] annotations, MediaType mediaType) {
@@ -61,8 +66,18 @@ public class JSONMessageBodyReaderWriter implements MessageBodyWriter<Object>,
WebApplicationException { WebApplicationException {
httpHeaders.putSingle(HttpHeaders.CONTENT_TYPE, mediaType.toString() httpHeaders.putSingle(HttpHeaders.CONTENT_TYPE, mediaType.toString()
+ ";charset=UTF-8"); + ";charset=UTF-8");
IOUtils.write(getGson().toJson(t), entityStream, "UTF-8"); OutputStreamWriter writer = new OutputStreamWriter(entityStream, UTF_8);
try {
Type jsonType;
if (type.equals(genericType)) {
jsonType = type;
} else {
jsonType = genericType;
}
getGson().toJson(t, jsonType, writer);
} finally {
writer.close();
}
} }
@Override @Override
@@ -70,13 +85,26 @@ public class JSONMessageBodyReaderWriter implements MessageBodyWriter<Object>,
Annotation[] annotations, MediaType mediaType, Annotation[] annotations, MediaType mediaType,
MultivaluedMap<String, String> httpHeaders, InputStream entityStream) MultivaluedMap<String, String> httpHeaders, InputStream entityStream)
throws IOException, WebApplicationException { throws IOException, WebApplicationException {
String json = IOUtils.toString(entityStream, "UTF-8"); InputStreamReader streamReader = new InputStreamReader(entityStream,
return getGson().fromJson(json, type); UTF_8);
try {
Type jsonType;
if (type.equals(genericType)) {
jsonType = type;
} else {
jsonType = genericType;
}
return getGson().fromJson(streamReader, jsonType);
} finally {
streamReader.close();
}
} }
private Gson getGson() { private Gson getGson() {
Gson gson = new GsonBuilder().registerTypeAdapter(Date.class, if (gson == null) {
new DateSerializer()).create(); gson = new GsonBuilder().registerTypeAdapter(Date.class,
new DateSerializer()).create();
}
return gson; return gson;
} }