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java - Flex 中没有上传文件

转载 作者:塔克拉玛干 更新时间:2023-11-02 20:08:16 25 4
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我正在尝试将一个 1kb 的文本文件上传到服务器。无论出于何种原因,我收到的数据不包含文件信息。所以 FileItem.Write(file) 不起作用。由于 FileItem 表示大小为 0。

我认为这不是连接问题,因为我设法接收了 URLVariables。唯一没有通过的是实际文件。

我遵循了 adobe flex 指南,但它仍然不起作用。 ( http://livedocs.adobe.com/flex/3/html/help.html?content=17_Networking_and_communications_7.html )

不会抛出任何错误并触发事件完成。

有什么建议吗?

弹性 3.2 SDKJ老板服务器java做后处理

编辑:添加源代码

CertificateUploadServlet.java

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import java.util.ListIterator;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class CertificateUploadServlet extends HttpServlet {

public void init(ServletConfig config) throws ServletException {
super.init(config);
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
{
File disk = null;
FileItem item = null;
DiskFileItemFactory factory = new DiskFileItemFactory();
ListIterator iterator = null;
List items = null;

Servlet FileUpload upload = new ServletFileUpload(factory);

try
{
items = upload.parseRequest(request);
}catch (FileUploadException e1)
{
// Oh Noes!
}


iterator = items.listIterator();

while(iterator.hasNext())
{
item = (FileItem) iterator.next();

if(item.isFormField())
{

}else
{
try
{
PrintWriter out1 = new PrintWriter(new BufferedWriter(new FileWriter("C:/Test/processUploadedFile2.txt",true)));

out1.println("item.getContentType():\t\t "+item.getContentType());
out1.println("item.getName:\t\t "+ item.getName());
out1.println("item.getSize:\t\t" + item.getSize());
out1.println("item.getString:\t\t" + item.getString());
out1.println("item.getFieldName:\t\t"+item.getFieldName());
out1.println("item.isInMemory:\t\t" + item.isInMemory());
out1.println("item.toString():\t\t" + item.toString());

out1.close();
}
catch(IOException e)
{
// oh Noes~
}
}
}
}

数据测试.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="horizontal"
creationComplete="init()">

<mx:Script>
<![CDATA[
import flash.netFileReference;
import mx.controls.Alert;

private var fileRef:FileReference = new FileReference();

private function init():void
{
fileRef.addEventListener(Event.SELECT, selectHandler);
fileRef.addEventListener(Event.COMPLETE, completeHandler);
}

private function selectHandler(event:Event):void
{
Alert.show("Selected...");

var request:URLRequest= new URLRequest("https://localhost/scm/uploadServlet");
fileRef.upload(request);
}

private function completeHandler(event:Event):void
{
Alert.show("File got uploaded");
}
]]>
</mx:Script>

<mx:Button id="mBrowseButton" label="browse..." click="fileRef.browse()" />
</mx:Application>

item.getName:返回我要上传的正确文件名

但 item.getSize 始终返回 0,因此当我尝试在服务器上写入文件时,它始终为空。

更多信息:

我能够将变量添加到 URLVariables 类并在 java 类中检索它。唯一的问题是文件没有传输。

输出:

Single file upload test
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\work\jboss.web\localhost\scm\upload_76556a96_14064a51ded__7ffa_00000000.tmp, size=10bytes, isFormField=true, FieldName=Filename
item name: Filename value: Cookie.txt
item.toString(): name=Cookie.txt, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\work\jboss.web\localhost\scm\upload_76556a96_14064a51ded__7ffa_00000001.tmp, size=0bytes, isFormField=false, FieldName=Filedata
item.getName() : Cookie.txt
item.getContentType(): application/octet-stream
item.getSize: 0
item.getString:
item.getFieldName: Filedata
item.isInMemory: true
item.toString(): name=Cookie.txt, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\work\jboss.web\localhost\scm\upload_76556a96_14064a51ded__7ffa_00000001.tmp, size=0bytes, isFormField=false, FieldName=Filedata
item name: Upload value: Submit Query

Multifile upload test
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\work\jboss.web\localhost\scm\upload_76556a96_14064a51ded__7ffa_00000003.tmp, size=10bytes, isFormField=true, FieldName=Filename
item name: Filename value: Cookie.txt
item.toString(): name=Cookie.txt, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\work\jboss.web\localhost\scm\upload_76556a96_14064a51ded__7ffa_00000004.tmp, size=0bytes, isFormField=false, FieldName=Filedata

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\work\jboss.web\localhost\scm\upload_76556a96_14064a51ded__7ffa_00000006.tmp, size=10bytes, isFormField=true, FieldName=Filename
item name: Filename value: doPost.txt
item.toString(): name=doPost.txt, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\work\jboss.web\localhost\scm\upload_76556a96_14064a51ded__7ffa_00000007.tmp, size=0bytes, isFormField=false, FieldName=Filedata


Single file upload test
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.toString(): name=Cookie.txt, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\work\jboss.web\localhost\scm\upload_76556a96_14064a51ded__7ffa_00000010.tmp, size=0bytes, isFormField=false, FieldName=Filedata
item name: Filename value: Cookie.txt
item.getName() : Cookie.txt
item.getContentType(): application/octet-stream
item.getSize: 0
item.getString:
item.getFieldName: Filedata
item.isInMemory: true
item.toString(): name=Cookie.txt, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\work\jboss.web\localhost\scm\upload_76556a96_14064a51ded__7ffa_00000010.tmp, size=0bytes, isFormField=false, FieldName=Filedata
item name: Upload value: Submit Query

编辑:更多信息。以下输出来自用户 c.s 代码。我不明白为什么它仍然不允许我按照记录的方式显示信息。

accept:text/*
content-type:multipart/form-data; boundary=----------ae0ae0ae0GI3ae0GI3ae0Ij5gL6cH2
user-agent:Shockwave Flash
host:localhost
content-length:1019
connection:Keep-Alive
cache-control:no-cache
cookie:JSESSIONID=BE2BF803041A7324CAF21445F6F3389C

------------ae0ae0ae0GI3ae0GI3ae0Ij5gL6cH2
Content-Disposition: form-data; name="Filename"

Cookie.txt
------------ae0ae0ae0GI3ae0GI3ae0Ij5gL6cH2
Content-Disposition: form-data; name="Filedata"; filename="Cookie.txt"
Content-Type: application/octet-stream

en.wikipedia.org FALSE / FALSE 0 BCSI-CS-1b3dbb382aea0366 2
en.wikipedia.org FALSE / FALSE 1404323604 centralnotice_bannercount_fr12 1
en.wikipedia.org FALSE / FALSE 1374590485 centralnotice_bucket 0-4.2
en.wikipedia.org FALSE / FALSE 1373131359 mediaWiki.user.bucket%3Aext.articleFeedbackv5%4011-tracking 11%3Aignore
en.wikipedia.org FALSE / FALSE 1373131359 mediaWiki.user.bucket%3Aext.articleFeedbackv5%405-links 5%3AX
en.wikipedia.org FALSE / FALSE 1373131359 mediaWiki.user.bucket%3Aext.articleFeedbackv5%406-form 6%3A6
en.wikipedia.org FALSE / FALSE 0 uls-previous-languages %5B%22en%22%5D
------------ae0ae0ae0GI3ae0GI3ae0Ij5gL6cH2
Content-Disposition: form-data; name="Upload"

Submit Query
------------ae0ae0ae0GI3ae0GI3ae0Ij5gL6cH2--

// dumpRequest = false output

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): null
item.getName: null
item.getSize: 10
item.getString: Cookie.txt
item.getFieldName: Filename
item.isFormField: true
item.isInMemory: true
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload__272408b1_140738428eb__7ffa_00000006.tmp, size=10bytes, isFormField=true, FieldName=Filename
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): application/octet-stream
item.getName: Cookie.txt
item.getSize: 0
item.getString:
item.getFieldName: Filedata
item.isFormField: false
item.isInMemory: true
item.toString(): name=Cookie.txt, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload__272408b1_140738428eb__7ffa_00000007.tmp, size=0bytes, isFormField=false, FieldName=Filedata
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): null
item.getName: null
item.getSize: 12
item.getString: Submit Query
item.getFieldName: Upload
item.isFormField: true
item.isInMemory: true
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload__272408b1_140738428eb__7ffa_00000008.tmp, size=12bytes, isFormField=true, FieldName=Upload

更多信息:

版本信息

Apache Maven: 2.2.1
Java version: 1.6.0_39
fileupload: 1.2
Commons-IO: 1.4
Internet Explorer: 8.0.7601.17514
Flash Player: 11.8.800.94

更多输出信息。第一次尝试使用 cookie.txt,第二次尝试使用 test.txt

#########################True/True
------------GI3gL6Ef1GI3cH2KM7ei4cH2gL6ei4
Content-Disposition: form-data; name="Filename"

Cookie.txt
------------GI3gL6Ef1GI3cH2KM7ei4cH2gL6ei4
Content-Disposition: form-data; name="Filedata"; filename="Cookie.txt"
Content-Type: application/octet-stream

en.wikipedia.org FALSE / FALSE 0 BCSI-CS-1b3dbb382aea0366 2
en.wikipedia.org FALSE / FALSE 1404323604 centralnotice_bannercount_fr12 1
en.wikipedia.org FALSE / FALSE 1374590485 centralnotice_bucket 0-4.2
en.wikipedia.org FALSE / FALSE 1373131359 mediaWiki.user.bucket%3Aext.articleFeedbackv5%4011-tracking 11%3Aignore
en.wikipedia.org FALSE / FALSE 1373131359 mediaWiki.user.bucket%3Aext.articleFeedbackv5%405-links 5%3AX
en.wikipedia.org FALSE / FALSE 1373131359 mediaWiki.user.bucket%3Aext.articleFeedbackv5%406-form 6%3A6
en.wikipedia.org FALSE / FALSE 0 uls-previous-languages %5B%22en%22%5D
------------GI3gL6Ef1GI3cH2KM7ei4cH2gL6ei4
Content-Disposition: form-data; name="Upload"

Submit Query
------------GI3gL6Ef1GI3cH2KM7ei4cH2gL6ei4--
#########################True/True
------------gL6GI3Ij5Ef1ei4Ef1ae0ei4Ef1gL6
Content-Disposition: form-data; name="Filename"

Test.txt
------------gL6GI3Ij5Ef1ei4Ef1ae0ei4Ef1gL6
Content-Disposition: form-data; name="Filedata"; filename="Test.txt"
Content-Type: application/octet-stream

This is text found instead Test.txt
------------gL6GI3Ij5Ef1ei4Ef1ae0ei4Ef1gL6
Content-Disposition: form-data; name="Upload"

Submit Query
------------gL6GI3Ij5Ef1ei4Ef1ae0ei4Ef1gL6--

#########################False/True
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): null
item.getName: null
item.getSize: 10
item.getString: Cookie.txt
item.getFieldName: Filename
item.isFormField: true
item.isInMemory: true
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload__32478800_14078614409__7ffa_00000000.tmp, size=10bytes, isFormField=true, FieldName=Filename
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): application/octet-stream
item.getName: Cookie.txt
item.getSize: 0
item.getString:
item.getFieldName: Filedata
item.isFormField: false
item.isInMemory: true
item.toString(): name=Cookie.txt, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload__32478800_14078614409__7ffa_00000001.tmp, size=0bytes, isFormField=false, FieldName=Filedata
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): null
item.getName: null
item.getSize: 12
item.getString: Submit Query
item.getFieldName: Upload
item.isFormField: true
item.isInMemory: true
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload__32478800_14078614409__7ffa_00000002.tmp, size=12bytes, isFormField=true, FieldName=Upload
#########################False/True
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): null
item.getName: null
item.getSize: 8
item.getString: Test.txt
item.getFieldName: Filename
item.isFormField: true
item.isInMemory: true
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload_6fd3dea8_140789cbb78__7ffa_00000003.tmp, size=8bytes, isFormField=true, FieldName=Filename
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): application/octet-stream
item.getName: Test.txt
item.getSize: 0
item.getString:
item.getFieldName: Filedata
item.isFormField: false
item.isInMemory: true
item.toString(): name=Test.txt, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload_6fd3dea8_140789cbb78__7ffa_00000004.tmp, size=0bytes, isFormField=false, FieldName=Filedata
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): null
item.getName: null
item.getSize: 12
item.getString: Submit Query
item.getFieldName: Upload
item.isFormField: true
item.isInMemory: true
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload_6fd3dea8_140789cbb78__7ffa_00000005.tmp, size=12bytes, isFormField=true, FieldName=Upload


#########################True/False
[accept:text/*
content-type:multipart/form-data; boundary=----------Ij5KM7ae0Ef1GI3ei4ei4gL6GI3ei4
user-agent:Shockwave Flash
host:localhost
content-length:1019
connection:Keep-Alive
cache-control:no-cache
cookie:JSESSIONID=C8FF29BF4253B2E9B9EEF3360F83EB74
]
#########################True/False
[accept:text/*
content-type:multipart/form-data; boundary=----------GI3cH2ei4KM7ei4GI3GI3KM7gL6ae0
user-agent:Shockwave Flash
host:localhost
content-length:449
connection:Keep-Alive
cache-control:no-cache
cookie:JSESSIONID=B4D506EF25DA8FD0D5B11DBA98B2B21D
]

#########################False/False
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): null
item.getName: null
item.getSize: 10
item.getString: Cookie.txt
item.getFieldName: Filename
item.isFormField: true
item.isInMemory: true
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload_50024124_140787caa99__7ffa_00000000.tmp, size=10bytes, isFormField=true, FieldName=Filename
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): application/octet-stream
item.getName: Cookie.txt
item.getSize: 0
item.getString:
item.getFieldName: Filedata
item.isFormField: false
item.isInMemory: true
item.toString(): name=Cookie.txt, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload_50024124_140787caa99__7ffa_00000001.tmp, size=0bytes, isFormField=false, FieldName=Filedata
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): null
item.getName: null
item.getSize: 12
item.getString: Submit Query
item.getFieldName: Upload
item.isFormField: true
item.isInMemory: true
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload_50024124_140787caa99__7ffa_00000002.tmp, size=12bytes, isFormField=true, FieldName=Upload
#########################False/False
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): null
item.getName: null
item.getSize: 8
item.getString: Test.txt
item.getFieldName: Filename
item.isFormField: true
item.isInMemory: true
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload_c1b3312_14078bd7c03__7ffa_00000000.tmp, size=8bytes, isFormField=true, FieldName=Filename
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): application/octet-stream
item.getName: Test.txt
item.getSize: 0
item.getString:
item.getFieldName: Filedata
item.isFormField: false
item.isInMemory: true
item.toString(): name=Test.txt, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload_c1b3312_14078bd7c03__7ffa_00000001.tmp, size=0bytes, isFormField=false, FieldName=Filedata
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
item.getContentType(): null
item.getName: null
item.getSize: 12
item.getString: Submit Query
item.getFieldName: Upload
item.isFormField: true
item.isInMemory: true
item.toString(): name=null, StoreLocation=C:\test\jboss-eap-5.1\jboss-as\server\test\tmp\upload_c1b3312_14078bd7c03__7ffa_00000002.tmp, size=12bytes, isFormField=true, FieldName=Upload

最佳答案

首先,请检查您上传的文件是否是您认为的文件,并且没有空内容。

其次,请使用下面的 servlet 代码并针对 httphttps 协议(protocol)运行您的示例。您可以将变量 dumpRequest 更改为 false 以打印与您所拥有的相似的 FileItem 的信息。

public class UploadServlet extends HttpServlet {

private boolean dumpRequest = true;
private boolean saveToFile = true;
private String fileName = "requestBody.txt";

@Override
public void init() {
log("Upload servlet initialized");
}

@Override
public void doPost(HttpServletRequest request, HttpServletResponse response) {
try {

log("Servicing new request...");


if (dumpRequest) {

dumpRequestBody(request, response);

} else {
Writer writer = new OutputStreamWriter( response.getOutputStream() );

FileItem item = null;
DiskFileItemFactory factory = new DiskFileItemFactory();

ServletFileUpload upload = new ServletFileUpload(factory);

List<?>items = upload.parseRequest(request);

ListIterator<?> iterator = items.listIterator();


while (iterator.hasNext()) {
item = (FileItem) iterator.next();

writer.write("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");

writer.write("item.getContentType():\t " + item.getContentType() + "\n");
writer.write("item.getName:\t" + item.getName() + "\n");
writer.write("item.getSize:\t" + item.getSize() + "\n");
writer.write("item.getString:\t" + item.getString() + "\n");
writer.write("item.getFieldName:\t" + item.getFieldName() + "\n");
writer.write("item.isFormField:\t" + item.isFormField() + "\n");
writer.write("item.isInMemory:\t" + item.isInMemory() + "\n");
writer.write("item.toString():\t" + item.toString() + "\n");
writer.flush();

}
writer.close();
}

} catch(Exception e) {
throw new RuntimeException(e);
}
}


private void dumpRequestBody(HttpServletRequest request, HttpServletResponse response) throws IOException {
OutputStream responseOut = response.getOutputStream();
InputStream in = request.getInputStream();

if (!saveToFile) {
dumpHeaders(request, responseOut);
dumpStream(in, responseOut);
} else {
File file = new File(fileName);
FileOutputStream out = new FileOutputStream(file);

dumpStream(in, out);
out.close();

Writer writer = new OutputStreamWriter(responseOut);
writer.write("Response body was saved to file: " + file.getAbsolutePath());
writer.close();
}
in.close();
responseOut.flush();
responseOut.close();
}

private void dumpHeaders(HttpServletRequest request, OutputStream out) throws IOException {
Writer writer = new OutputStreamWriter(out);
writer.write("[");

// first dump headers
Enumeration<String> allHeaders = request.getHeaderNames();
while (allHeaders.hasMoreElements()) {
String header = allHeaders.nextElement();
String value = request.getHeader(header);
writer.write(header + ":" + value + "\n");
}
writer.write("]");
writer.flush();
}

private void dumpStream(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[2 * 1024];
int bytesRead = 0;
while ((bytesRead = in.read(buffer)) != -1) {
out.write(buffer, 0, bytesRead);
}
out.flush();
}
}

上面的 servlet 为 http 和名为 test.txt 的文件运行时,其中包含上传的一行简单的文本 Test data通过一个简单的 html 页面生成下面的转储。将您获得的输出(也请用这些输出更新您的问题)与下面的输出进行比较,以便能够进一步解决此问题。

[host:localhost:8080
user-agent:Mozilla/5.0 (Windows NT 6.0; rv:22.0) Gecko/20100101 Firefox/22.0
accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
accept-language:el-gr,el;q=0.8,en-us;q=0.5,en;q=0.3
accept-encoding:gzip, deflate
referer:http://localhost:8080/upload/upload.html
connection:keep-alive
content-type:multipart/form-data; boundary=---------------------------5118710224663
content-length:298
]-----------------------------5118710224663
Content-Disposition: form-data; name="myfile"; filename="test.txt"
Content-Type: text/plain

Test data
-----------------------------5118710224663
Content-Disposition: form-data; name="submit"

Submit
-----------------------------5118710224663--

更新 1:Servlet 代码和输出已更新。新的 servlet 可以选择将请求主体写入文件。请使用 dumpRequest = truesaveToFile = false 运行两次以查看响应结果并更新问题中的输出,一次使用 true对于两者,将请求正文保存在文件中。请将该文件上传到某处。

从 UploadServlet 的第一个输出可以看出,文件数据存在于请求正文中,但公共(public)文件上传没有正确解析它们。如果您使用的是最新版本(即 commons-fileupload: 1.3, commons-io: 2.4),或者如果您使用的是旧版本,那么您要么遇到错误(这不是第一次 commons upload and Flash don't play nice together )正在遇到那个错误或它的副作用。

因为最可能的原因是Flash使用的行变化有问题,或者它写边界的方式有问题。无论如何,如果您可以上传一个包含如上所述生成的响应主体的文件,并且还请提及您的版本:commons-fileupload、commons-io、Flash 播放器、您在您的场景中使用的浏览器,那就太好了。


更新 2:很遗憾,我无法使用您提供的文件中的请求正文重现您的情况。虽然 Flash 似乎没有创建严格有效的请求(它没有在文件末尾添加额外的 \r\n),但我可以使用 commons-file-upload 正常上传此请求1.2 和 1.3 所以我已经没有想法了。

我建议的最后一件事是尝试使用下面的简单 html 页面从浏览器上传文件。将此文件放在 Web 应用程序的根目录中并上传文件 Cookie.txt(确保表单中的 action 指向上传 servlet)。如果这不起作用,那么问题出在公共(public)文件上传方面,尽管我无法想象它可能是什么。密切关注服务器日志(也许某个地方的异常被浅化了?)也没有坏处。

唯一可以揭示您的问题的安全方法是下载 commons-file-upload 的源代码,将其放入您的项目中,而不是将其用作依赖项和调试。由于在您的案例中每次都会出现问题,因此找到它应该不难。

上传 html:

<html>
<body>

<form action="/scm/uploadServlet" method="post" enctype="multipart/form-data">

<label for="file">Filename:</label><br/>
<input type="file" name="myfile" id="file"><br/>
<input type="submit" name="submit" value="Submit">
</form>

</body>
</html>

关于java - Flex 中没有上传文件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18092062/

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