Vertx3.0简单表单上传
Vertx3.0简单表单上传
提问于 2016-02-25 06:24:35
Vertx3.0 http simpleform文件上载程序正在为多个文件抛出错误。
我使用vertx3.0简单的表单上传。当我上传单个文件时，它工作得很好。如果表单的输入是" multiple“，并选择了多个文件，则HTTPServerUpload会抛出错误"Response has written”。由于响应在第一个文件的结束处理程序中结束，因此它将在后续文件中抛出此错误。有没有其他方法可以处理多个文件？
使用vertx3.0上传Simpleform文件
public class SimpleFormUploadServer extends AbstractVerticle {
public static void main(String[] args) {
Runner.runExample(SimpleFormUploadServer.class);
}
@Override
public void start() throws Exception {
vertx.createHttpServer()
.requestHandler(req -> {
if (req.uri().equals("/")) {
// Serve the index page
req.response().sendFile("index.html");
} else if (req.uri().startsWith("/form")) {
req.setExpectMultipart(true);
req.uploadHandler(upload -> {
upload.exceptionHandler(cause -> {
req.response().setChunked(true)
.end("Upload failed");
});
upload.endHandler(v -> {
req.response()
.setChunked(true)
.end("Successfully uploaded to "
+ upload.filename());
});
// FIXME - Potential security exploit! In a real
// system you must check this filename
// to make sure you're not saving to a place where
// you don't want!
// Or better still, just use Vert.x-Web which
// controls the upload area.
upload.streamToFileSystem(upload.filename());
});
} else {
req.response().setStatusCode(404);
req.response().end();
}
}).listen(8080);
}
}
Exception :
SEVERE: Unhandled exception
java.lang.IllegalStateException: Response has already been written
at io.vertx.core.http.impl.HttpServerResponseImpl.checkWritten(HttpServerResponseImpl.java:561)
at io.vertx.core.http.impl.HttpServerResponseImpl.end0(HttpServerResponseImpl.java:389)
at io.vertx.core.http.impl.HttpServerResponseImpl.end(HttpServerResponseImpl.java:307)
at io.vertx.core.http.impl.HttpServerResponseImpl.end(HttpServerResponseImpl.java:292)
at com.nokia.doas.vertx.http.upload.SimpleFormUploadServer$1$1$2.handle(SimpleFormUploadServer.java:85)
at com.nokia.doas.vertx.http.upload.SimpleFormUploadServer$1$1$2.handle(SimpleFormUploadServer.java:1)
at io.vertx.core.http.impl.HttpServerFileUploadImpl.notifyEndHandler(HttpServerFileUploadImpl.java:213)
at io.vertx.core.http.impl.HttpServerFileUploadImpl.lambda$handleComplete$165(HttpServerFileUploadImpl.java:206)
at io.vertx.core.file.impl.AsyncFileImpl.lambda$doClose$226(AsyncFileImpl.java:470)
at io.vertx.core.impl.ContextImpl.lambda$wrapTask$16(ContextImpl.java:335)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:358)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112)
at java.lang.Thread.run(Unknown Source)
index.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title></title>
</head>
<body>
<form action="/form" ENCTYPE="multipart/form-data" method="POST" name="wibble">
choose a file to upload:<input type="file" name="files" multiple="multiple"/><br>
<input type="submit"/>
</form>
</body>
</html>回答 2
Stack Overflow用户
发布于 2016-02-25 21:32:29
您可以使用vertx-web轻松处理文件上传：
router.route().handler(BodyHandler.create());
router.post("/some/path/uploads").handler(routingContext -> {
Set<FileUpload> uploads = routingContext.fileUploads();
// Do something with uploads....
});此外，您将获得routing facility的好处，您甚至可以使用serve static files，例如index.html。
希望这能有所帮助。
Stack Overflow用户
发布于 2016-09-16 17:28:53
在vert.x中可以实现多个文件上传。在HTML中使用多个upload按钮，并使用HttpRequest的uploadHandler。上载任何数量的文件时，UploadHandler都会被调用多次。
HttpServerRequest request = routingContext.request();
request.setExpectMultipart(true);
request.endHandler(new Handler<Void>() {
@Override
public void handle(Void aVoid) {
MultiMap entries = request.formAttributes();
Set<String> names = entries.names();
logger.info("UPLOAD_CONTENT: fileName = "+entries.get("fileName"));
logger.info("UPLOAD_CONTENT: type = "+entries.get("type"));
logger.info("UPLOAD_CONTENT: names = "+names);
request.response().setChunked(true).end(createResponse("SUCCESS"));
}
});
// This would be called multiple times
request.uploadHandler(upload -> {
upload.exceptionHandler(new Handler<Throwable>() {
@Override
public void handle(Throwable error) {
logger.error("UPLOAD_CONTENT: Error while uploading content "+upload.filename());
logger.error("UPLOAD_CONTENT: error = "+error.toString());
error.printStackTrace();
request.response().setChunked(true).end(createResponse("FAILURE"));
}
});
upload.endHandler(new Handler<Void>() {
@Override
public void handle(Void aVoid) {
logger.info("UPLOAD_CONTENT: fileName = "+upload.filename());
logger.info("UPLOAD_CONTENT: name = "+upload.name());
logger.info("UPLOAD_CONTENT: contentType = "+upload.contentType());
logger.info("UPLOAD_CONTENT: size = "+upload.size());
UtilityFunctions.uploadToS3(upload.filename(), "testfolder");
}
});
upload.streamToFileSystem(upload.filename());
});页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/35614439
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