Access php temp file with java - java

I like to access an uploaded file which is temporarily stored in /tmp via php.
If I try to access it using the tmp_name from php which is the path I get this error:
java.io.FileNotFoundException: /tmp/php5UY3Ag (Permission denied)
The file is there. Otherwise I would get this error:
java.io.FileNotFoundException: /tmp/php5UY3Ag (No such file or directory)
I'm using the PHP JAVA Bridge to hand over the path.
Java is running under apache tomcat and php under the apache web server.
What do I have to do to get this working?

Related

Java sftpChannel put error (The system cannot find the path specified)

I am going to transfer files to remote sftp by Java sftpchannel. Everything are going to be as expected. It was well tested on STS (Spring Tool Suite 4.7.1). But it failed when it was deployed to tomcat server.
// Logs
File path: S:/System/AutoSend/Data.json
Remote path: Data.json
Before sftp put
Sftp error: 4: java.io.FileNotFoundException: S:\System\AutoSend\Data.json (The system cannot find the path specified)
(Unix-formated path has been transformed to windows format automatically?)
What can I do to fix the issue? Thanks a lot.

Have you tried making the File Path a String? Like this: "S:/System/AutoSend/Data.json"
and
is the "S" Drive on your Tomcat-Server? If not, try using the IP-address instead.

Java - Newly created file on smb share has no user, no group

I mounted a SMB share via fstab:
//IP_SERVER/public /home/sl/images_server cifs username=USER,passwd=PASSWD 0 0
I want to create some new files in /home/sl/images_server. The folder has the mod 777 and the user and group sl.
When I try to save a file via Java I get this error:
java.io.FileNotFoundException: /home/sl/images_server/test.jpg (Permission denied)
I use the following code to write the image:
ImageIO.write(ImageIO.read(SOURCE_FILE), "jpg", new File("/home/sl/images_server/test.jpg"));
After I executed the Java command I see a newly created file in the folder with nobody as user, nogroup as group and '-rw-r--r--' as mod.
What is neccessary to save a file in this folder.

Ok, the problem has nothing to do with Java. It was just my samba server which wasn't configured well.
See this for more informations.
https://askubuntu.com/questions/97669/i-cant-get-samba-to-set-proper-permissions-on-created-directories

Azure specific reading files from local on spark

I am struggling with Azure wasb on spark
I am reading loading a .json.gz file from disk and loading it into hdfs. I have used the following code extensively on other systems.
val file_a_raw = sqlContext.read.json('/home/users/repo_test/file_a.json.gz')
However, on Azure, this returns:
java.io.FileNotFoundException: Filewasb://server-2017-03-07t08-13-41-314z#server.blob.core.windows.net/home/users/repo_test/file_a.json.gz does not exist.
I have checked this location and the file is there and correct.
I think there should be a : between .net and then file path, but I get a java error trying to manually add that in.
java.lang.IllegalArgumentException: java.net.URISyntaxException: Expected scheme name at index 0:
I've also tried:
Filewasb:///home/users/repo_test/file_a.json.gz
But that returns:
java.io.IOException: No FileSystem for scheme: Filewasb
This code works fine on non Azure spark

For Azure, you'll need to configure Spark with the proper credentials. Databricks has documentation on this: https://docs.databricks.com/user-guide/faq/azure-blob-storage.html

Ask permission from the user to write files

I have a web application that has the feature to upload PDF which is done by the following process:
Create a folder on user's local path ( C:/resource/pdf/ )
Write the PDF file inside the folder.
On my local(running on eclipse/tomcat) it can write the files directly but on the web I actually getting an error:
java.io.FileNotFoundException: C:\resource\pdf\Daily News.pdf (Permission denied)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(Unknown Source)
...
I'm using Spring MVC if it is related.
Is there a way to ask the user for a permission to write files in their local?

I am assuming you use a File object in your code; if so you can just do this:
File folder;
// set directory and everything
// create folder
folder.setWritable(true, true);
Then you can check if you can write with this:
write = folder.canWrite();
System.out.println(write);

How to get a path of a folder in cloudera?

Im trying to run a my code in java using hadoop but I get an error of the path of the file
scanner1 = new Scanner(new File("/home/cloudera/pos.txt")); //Path
The error message that I get is:
Status : FAILED
java.io.FileNotFoundException: /home/cloudera/pos.txt (Permission denied)

The "Permission denied" in the error message indicates you don't have read access to the directory. Which user is running the java code, your personal user or the cloudera? To fix, you should either make the data readable for your user, move it to a common location that is globally readable, think /usr/local, or run your code as the cloudera user. Also, is this in HDFS or on the local filesystem?

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