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This page (revision-13) was last changed on 05-Dec-2023 05:32 by Ben Spink

This page was created on 05-Dec-2023 05:32 by Ben Spink

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At line 1 changed 128 lines
Example source code for a custom protocol handler for the virtual file system.
In the user manager, make a new VFS item. Set its protocol to be CUSTOM, and use a URL like this:
CUSTOM_com.myprotocol.VFS_MyProtocol://any_data_you_want_on_the_url/
{{{
package com.myprotocol;
import crushftp.handlers.*;
import java.util.*;
import java.io.*;
import java.text.*;
import crushftp.server.*;
public class VFS_MyProtocol
{
VFS uVFS = null;
VRL url = null;
Properties vItem = null;
public VFS_MyProtocol(VFS uVFS, String urlStr, Properties vItem)
{
this.uVFS = uVFS;
this.url = new VRL(urlStr);
this.vItem = vItem;
}
public Properties get_item(String path) throws Exception
{
if (path.endsWith("/")) path = path.substring(0,path.length()-1);
Properties dir_item = new Properties();
dir_item.put("url",url+path);
dir_item.put("local","false");
dir_item.put("protocol", "ftp");
dir_item.put("type", "FILE");
dir_item.put("permissions", "drwxrwxrwx");
dir_item.put("num_items", "0");
dir_item.put("owner", "owner");
dir_item.put("group", "group");
dir_item.put("size", "0");
dir_item.put("month", "1");
dir_item.put("day", "1");
dir_item.put("time_or_year", "12:00");
dir_item.put("name", "test");
dir_item.put("local", "false");
dir_item.put("dir", path);
return dir_item;
}
public void getListing(Vector list, String path) throws Exception
{
if (path.startsWith("/")) path = path.substring(1);
Common.debug(2,"ls "+url+path);
}
public InputStream getInputStream(Long seekPos, Properties item) throws Exception
{
Common.debug(2,"get "+item.getProperty("url"));
InputStream inStream = null;
long skipped = 0;
long amt = seekPos - skipped;
while(skipped < seekPos)
{
long l = inStream.skip(amt);
if (l > 0) skipped += l;
else break;
amt = seekPos - skipped;
}
return inStream;
}
public OutputStream getOutputStream(Long seekPos, final Properties item) throws Exception
{
Common.debug(2,"put "+item.getProperty("url"));
OutputStream outStream = null;
return outStream;
}
public String doCommand(String command, Properties item) throws Exception
{
Common.debug(2,command +" "+item.getProperty("url"));
String s = "";
try
{
if (command.toUpperCase().startsWith("DELE"))
{
s = "250 OK";
}
else if (command.toUpperCase().startsWith("RMD"))
{
s = "250 OK";
}
else if (command.toUpperCase().startsWith("MKD"))
{
s = "257 OK";
}
else if (command.toUpperCase().startsWith("MDTM"))
{
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
s = "213 " + sdf.format(new Date());
}
else if (command.toUpperCase().startsWith("SIZE"))
{
s = "213 0";
}
else s = "200 Ignoring command.";
}
catch(Exception e)
{
Common.debug(1, e);
s = "550 "+e.toString();
}
return s;
}
public Boolean rename(Properties item1, Properties item2) throws Exception
{
Common.debug(2,"rename "+item1.getProperty("url") + " to " + item2.getProperty("url"));
return new Boolean(false);
}
}
}}}
A custom VFS can be created too. Contact me for details if you're a java programmer wanting to implement your own VFS. This might be a VFS based on database records, or other things.
Version Date Modified Size Author Changes ... Change note
13 05-Dec-2023 05:32 0.186 kB Ben Spink to previous
12 05-Dec-2023 05:32 0.184 kB Ben Spink to previous | to last
11 05-Dec-2023 05:32 5.454 kB Ben Spink to previous | to last
10 05-Dec-2023 05:32 5.366 kB Ben Spink to previous | to last
9 05-Dec-2023 05:32 5.218 kB Ben Spink to previous | to last
8 05-Dec-2023 05:32 4.812 kB Ben Spink to previous | to last
7 05-Dec-2023 05:32 4.821 kB Ben Spink to previous | to last
6 05-Dec-2023 05:32 4.761 kB Ben Spink to previous | to last
5 05-Dec-2023 05:32 4.728 kB Ben Spink to previous | to last
4 05-Dec-2023 05:32 3.205 kB Ben Spink to previous | to last
3 05-Dec-2023 05:32 0.293 kB Ben Spink to previous | to last
2 05-Dec-2023 05:32 0.117 kB Ben Spink to previous | to last
1 05-Dec-2023 05:32 0.028 kB Ben Spink to last
« This page (revision-13) was last changed on 05-Dec-2023 05:32 by Ben Spink
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