com.networknt.codegen.handler.ValidateUploadFileHandler Maven / Gradle / Ivy
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package com.networknt.codegen.handler;
import com.networknt.rpc.HybridHandler;
import com.networknt.rpc.router.ServiceHandler;
import com.networknt.utility.NioUtils;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.form.FormData;
import io.undertow.util.HttpString;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
/**
* @author Nicholas Azar
* Created on July 8, 2017.
*/
@Deprecated
@ServiceHandler(id="lightapi.net/codegen/validateUploadFile/0.0.1")
public class ValidateUploadFileHandler implements HybridHandler {
static private final Logger logger = LoggerFactory.getLogger(ValidateUploadFileHandler.class);
/**
* Retrieve the file from the request and validate the json contents against a schema.
* Will return the contents of the file as well.
*
* @param o The multipart as parsed from com.networknt.rpc.router.MultipartHandler
*
* @return The contents of the file if valid, null otherwise. TODO to provide error messages.
*/
@Override
public ByteBuffer handle(HttpServerExchange exchange, Object o) {
exchange.getResponseHeaders().add(new HttpString("Content-Type"), "application/json");
if (o instanceof FormData) {
File file = this.getFileFromForm((FormData)o);
try {
// TODO validate against schema... where do I find the schema?
String fileContents = new String(Files.readAllBytes(file.toPath()), StandardCharsets.UTF_8);
return NioUtils.toByteBuffer(fileContents);
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
/**
* Return the first file received in the request.
*
* @param formData The multipart request.
* @return A file if the request has one, null otherwise.
*/
private File getFileFromForm(FormData formData) {
for (String data: formData) {
for (FormData.FormValue formValue : formData.get(data)) {
if (formValue.isFile()) {
return formValue.getPath().toFile();
}
}
}
return null;
}
}