怎样在 fedora 28 上 打开 .jnlp 文件

最近使用 iDrac 和 iLO 总是会使用到 .jnlp 文件， 为了方便，今天把设置过程记录下来。

JNLP 文件，全名为 Java Network Launching Protocol 文件, 我们需要 javaws 命令去执行它。

在 fedora 中 ，我们需要安装 相应的 rpm 包，yum 仓库中已经为我们准备好了相关的文件，我们只需要运行命令来安装就行了。当然你也可以使用 编译源码安装。

➜  Downloads yum search icedtea
Last metadata expiration check: 16 days, 20:58:23 ago on Fri 06 Jul 2018 05:04:10 PM CST.
==================================================================== Summary & Name Matched: icedtea =====================================================================
icedtea-web-javadoc.noarch : API documentation for IcedTea-Web
icedtea-web-devel.noarch : pure sources for debugging IcedTea-Web
========================================================================= Name Matched: icedtea ==========================================================================
icedtea-web.noarch : Additional Java components for OpenJDK - Java browser plug-in and Web Start implementation

➜  Downloads sudo yum install icedtea-web

Javaws 命令 执行

➜  Downloads javaws

SYNOPSIS
    javaws [-run-options] jnlp file
    javaws [-control-options]

OPTIONS
    When specifying options, the name of the jnlp file can be after the command, the -jnlp option, an option with no arguments, or after an argument with an option that takes one argument. A html file that launches a jnlp can be specified after the -html option.
    The jnlp-file can either be a url or a local path.
    The JNLP file should only be specified once, whether as a main argument, after -jnlp or through an html file.
    Control options:
    -about               - Shows a sample application.(No argument expected)
    -help                - Prints out information about supported command and basic usage.(No argument expected)
    -license             - Display the GPL license and exit.(No argument expected)
    -viewer              - Shows the trusted certificate viewer.(No argument expected)
    -Xclearcache         - Clean the JNLP application cache.(No argument expected)
    Run options:
    -allowredirect       - Follows HTTP redirects.(No argument expected)
    -arg arg             - Adds an application argument before launching.(Expected one or more arguments)
    -browser             - Launch embeded browser. Use in great need only!(Expected one or more arguments)
    -headless            - Disables download window, other UIs.(No argument expected)
    -html                - Location of HTML file to launch (url or file). You can use parameter ALL  or numbers (like 1 2 5) to select applets on page. However experimental, this switch should keep you still in safety.(Expected one or more arguments)
    -jnlp                - Location of JNLP file to launch (url or file).(Exactly one argument expected)
    -nosecurity          - Disables the secure runtime environment. You need also  deployment.security.itw.ignorecertissues to workaround corrupted signatures(No argument expected)
    -noupdate            - Disables checking for updates.(No argument expected)
    -param name=value    - Adds an applet parameter before launching.(Expected one or more arguments)
    -property name=value - Sets a system property before launching.(Expected one or more arguments)
    -strict              - Enables strict checking of JNLP file format.(No argument expected)
    -update seconds      - Check for updates.(Exactly one argument expected)
    -verbose             - Enable verbose output.(No argument expected)
    -version             - Print the IcedTea-Web version and exit.(No argument expected)
    -Xignoreheaders      - Skip jar header verification.(No argument expected)
    -xml                 - Uses a strict XML parser to parse the JNLP file.(No argument expected)
    -Xnofork             - Do not create another JVM.(No argument expected)
    -Xoffline            - Prevent ITW network connection. Only cache will be used. Application can still connect.(No argument expected)
    -Xtrustnone          - Instead of asking user, will foretold all answers as no.(No argument expected)

Javaws 命令 说明

NAME
       javaws - a Java Web Start client

SYNOPSIS
       javaws [-run-options] jnlp file
       javaws [-control-options]

DESCRIPTION
       javaws  is  an implementation of a JNLP client. It uses a JNLP (Java Network Launch Protocol) file to securely run a remote Java application or a Java applet.
       This implementation of javaws is from the IcedTea project and is based on the NetX project.

       A JNLP file is an xml file that describes how to securely run a remote Java application or a Java applet.

执行 jnlp 文件：

➜  Downloads javaws viewer.jnlp 

同理，在 ubuntu 中，也可以使用 apt 等工具进行搜索安装。

具体情况以实际执行为准。

参考： 

https://linux-tips.com/t/execute-jnlp-files-in-linux/252

https://fedora.pkgs.org/27/fedora-i386/icedtea-web-1.7-4.fc27.noarch.rpm.html

https://icedtea.classpath.org/wiki/Main_Page

https://icedtea.classpath.org/wiki/FedoraBuildInstructions