JarCastinginetutils4j
Helper classes for internet related operations, like proxy settings and downloading files.
API
Proxy
There are three types of proxies supported:
- HTTP
- FTP
- SOCKS
Use the com.github.fracpete.inetutils4j.api.Proxy class to set or query current proxy settings:
import com.github.fracpete.inetutils4j.api.Proxy;
import com.github.fracpete.inetutils4j.api.Proxy.ProxyType;
...
Proxy.setProxy(ProxyType.HTTP, "http://proxy.example.com", 3128);
You can also supply the port in the URL:
import com.github.fracpete.inetutils4j.api.Proxy;
import com.github.fracpete.inetutils4j.api.Proxy.ProxyType;
...
Proxy.setProxy(ProxyType.HTTP, "http://proxy.example.com:3128");
If you need to supply a user and password for the proxy, use this:
import com.github.fracpete.inetutils4j.api.Proxy;
import com.github.fracpete.inetutils4j.api.Proxy.ProxyType;
...
Proxy.setProxy(ProxyType.HTTP, "http://USER:[email protected]:3128");
Downloading files
The download method of the com.github.fracpete.inetutils4j.api.Internet class performs the actual download. Whether you want to capture any output from running it in verbose, is handled by an instance of com.github.fracpete.inetutils4j.core.OutputCapture. Use NullCapture to avoid any output or DefaultCapture to simply output to stdout/stderr.
import com.github.fracpete.inetutils4j.api.Internet;
import com.github.fracpete.inetutils4j.core.DefaultCapture;
...
String msg = Internet.download(
"http://myserver.example.com/myfile.txt",
"/home/user/myfile.txt",
true,
new DefaultCapture());
if (msg != null)
System.err.println("An error occurred:\n" + msg);
NB: The download method automatically handles redirects.
Downloading binary data
The binaryContent method of the com.github.fracpete.inetutils4j.api.Internet class performs the download of a remote resource. Whether you want to capture any output from running it in verbose, is handled by an instance of com.github.fracpete.inetutils4j.core.OutputCapture. Use NullCapture to avoid any output or DefaultCapture to simply output to stdout/stderr.
import com.github.fracpete.inetutils4j.api.Internet;
import com.github.fracpete.inetutils4j.core.DefaultCapture;
...
byte[] data = Internet.binaryContent(
"http://myserver.example.com/myfile.txt",
true,
new DefaultCapture());
if (data == null)
System.err.println("An error occurred!");
else
System.out.println(data.length + " bytes downloaded");
NB: The binaryContent method automatically handles redirects.
Downloading textual data
The textualContent method of the com.github.fracpete.inetutils4j.api.Internet class performs the download of a remote resource. Whether you want to capture any output from running it in verbose, is handled by an instance of com.github.fracpete.inetutils4j.core.OutputCapture. Use NullCapture to avoid any output or DefaultCapture to simply output to stdout/stderr.
import com.github.fracpete.inetutils4j.api.Internet;
import com.github.fracpete.inetutils4j.core.DefaultCapture;
...
String html = Internet.textualContent(
"http://myserver.example.com/myfile.txt",
"ISO-8859-1",
true,
new DefaultCapture());
if (html == null)
System.err.println("An error occurred!");
else
System.out.println(html);
NB: The textualContent method automatically handles redirects.
Command-line tools
Download
usage: com.github.fracpete.inetutils4j.tools.Download
[-h] -r REMOTE -l LOCAL [-v] [--http_proxy HTTP_PROXY]
[--ftp_proxy FTP_PROXY] [--socks_proxy SOCKS_PROXY]
Allows the download of remote files.
If proxies should require user/password, then you need to include these in
the URL. For instance, for a HTTP proxy, use this format:
http://USER:[email protected]:3128/
optional arguments:
-h, --help show this help message and exit
-r REMOTE, --remote REMOTE
The URL of the remote file to download
-l LOCAL, --local LOCAL
The local file to download the remote file to.
-v, --verbose increase verbosity
--http_proxy HTTP_PROXY
The URL of the HTTP proxy to use (including port)
--ftp_proxy FTP_PROXY The URL of the FTP proxy to use (including port)
--socks_proxy SOCKS_PROXY
The URL of the socks proxy to use (including port)
Maven
Add the following artifact to your dependencies of your pom.xml:
<dependency>
<groupId>com.github.fracpete</groupId>
<artifactId>inetutils4j</artifactId>
<version>0.0.2</version>
</dependency>
Releases
The following releases are available: