英文:
How do I make a temporary file on heroku? Not resolved problem
问题
我在Heroku上托管了一个应用。
它有一个简单的功能，可以将文件上传到FTP服务器。
在本地，它运行得很完美，
但是我在部署在Heroku上的同样的应用中遇到了问题。
在尝试保存文件时，它抛出一个错误。
实际上，它也确实保存了文件，但文件大小为0字节。
以下是代码部分：
public boolean fileUpload(MultipartFile file, String fileName) {
try {
FtpClient ftp = new FtpClient(ftpHost, ftpPort, ftpUser, ftpPassword);
ftp.open();
File tempFile = File.createTempFile(System.currentTimeMillis() + "tmp", "jpg");
file.transferTo(tempFile);
ftp.putFileToPath(tempFile, fileName);
ftp.close();
return true;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
我认为问题可能出在这一行：
File tempFile = File.createTempFile(System.currentTimeMillis() + "tmp", "jpg");
file.transferTo(tempFile);
我已经根据StackOverflow上关于这个问题的所有问题进行了尝试，
但是我没有得到有效的答案。
除了日志记录之外，我在Heroku上没有添加任何插件。
以下是与该问题相关的日志：
Oct 08 01:53:04.527pm info app web.1 200 PORT command successful (xxx.xx.xx.xxx:xxxxx).
Oct 08 01:53:04.528pm info app web.1 STOR 1602157983845A2.jpg
Oct 08 01:53:04.636pm info app web.1 150 Opening BINARY mode data connection for '1602157983845A2.jpg'.
Oct 08 01:53:33.706pm error heroku router req=0a0bbc10… at=error code=H12 desc="Request timeout"
method=POST path="/add-graphic" host=xxxxxxx.herokuapp.com request_id=xxxxxxxx-xxxx-xxxx-xxxx-
xxxxxxxxxxxx fwd="xx.xxx.xx.xxx" dyno=web.1 connect=0ms service=30889ms status=503 bytes=0
protocol=https
经过进一步的问题研究，
似乎Heroku的dyno在这一行上卡住了：
ftp.putFileToPath(tempFile, fileName);
putFileToPath方法的实现如下：
public void putFileToPath(File file, String path) throws IOException {
ftp.storeFile(path, new FileInputStream(file));
}
英文:
I have an app hosted on Heroku.<br>
It has a simple functionality to upload files on a ftp server.<br>
Locally it works perfectly, <br>
but I have a problem with the same app deployed on heroku.<br>
It throws an error when trying to save a file.<br>
Actually it also saves it, but the file's size is 0 bytes<br>
here is the code:<br>
public boolean fileUpload(MultipartFile file, String fileName) {
try {
FtpClient ftp = new FtpClient(ftpHost, ftpPort, ftpUser, ftpPassword);
ftp.open();
File tempFile = File.createTempFile(System.currentTimeMillis() + "tmp", "jpg");
file.transferTo(tempFile );
ftp.putFileToPath(tempFile , fileName);
ftp.close();
return true;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
I think that the problem is with this line:
File tempFile = File.createTempFile(System.currentTimeMillis() + "tmp", "jpg");
file.transferTo(tempFile );
I have passed through all the questions according to the problem on StackOverflow<br>
but I didn't get the working answer<br>
I din't add any add-ons on heroku instead of logging.<br>
Here is a log from that problem:
> Oct 08 01:53:04.527pm info app web.1 200 PORT command successful (xxx.xx.xx.xxx:xxxxx).
>
> Oct 08 01:53:04.528pm info app web.1 STOR 1602157983845A2.jpg
>
> Oct 08 01:53:04.636pm info app web.1 150 Opening BINARY mode data connection for '1602157983845A2.jpg'.
>
> Oct 08 01:53:33.706pm error heroku router req=0a0bbc10… at=error code=H12 desc="Request timeout"
> method=POST path="/add-graphic" host=xxxxxxx.herokuapp.com request_id=xxxxxxxx-xxxx-xxxx-xxxx-
> xxxxxxxxxxxx fwd="xx.xxx.xx.xxx" dyno=web.1 connect=0ms service=30889ms status=503 bytes=0
> protocol=https
After some more rearch of the problem, <br>
it seems that heroku dyno stucks on that line:
ftp.putFileToPath(tempFile , fileName);
the methot putFileToPath looks like that:
public void putFileToPath(File file, String path) throws IOException {
ftp.storeFile(path, new FileInputStream(file));
}
答案1
得分: 1
在
ftp.storeFile(path, new FileInputStream(file));
之前添加
ftp.enterLocalPassiveMode();
背景信息：https://stackoverflow.com/questions/19935068/ftp-timing-out-on-heroku
英文:
Add
ftp.enterLocalPassiveMode()
before
ftp.storeFile(path, new FileInputStream(file));
Background: https://stackoverflow.com/questions/19935068/ftp-timing-out-on-heroku
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