[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8},"actionData","errors","root",{"_11":-5,"_56":57,"_58":59,"_60":61},"routes/user.$name.collections",{"_9":10,"_11":12,"_13":14,"_15":16,"_17":18,"_19":16},"topics",[35],"user",{"_20":21,"_13":14,"_22":23,"_24":25,"_26":27,"_28":29,"_30":16,"_31":32,"_33":34},"loginname","virusswb","page",1,"limit",20,"total","id","4081","avatar_url","http://www.gravatar.com/avatar/d62d782bd0ed42394797cff8a9adae70?size=48","githubUsername","","create_at","2012-06-12T06:26:43.693Z","score",40,"topic_count","reply_count",7,"is_star",false,{"_20":36,"_37":38,"_39":-5,"_40":41,"_42":43,"_44":45,"_46":34,"_47":34,"_31":48,"_49":50,"_26":51,"_52":53},"112","author_id","12","tab","content","node.js是基于Google V8的，而Google V8有一个Eclipse的调试插件，这个插件同样也支持node.js。\r\n

1、安装Eclipse debugger for V8

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这个，用过Eclipse的应该都知道，不过还是简单说下吧：\r\n
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$\"wps_clip_image-13545\"$ \r\n
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选择“Install New Software”\r\n
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$\"wps_clip_image-13957\"$ \r\n
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点“Add”\r\n
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$\"wps_clip_image-14038\"$ \r\n
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Location为： http://chromedevtools.googlecode.com/svn/update/dev/\r\n
Name你喜欢，整一个方便你记忆的就好。\r\n
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点击确定后，在“Work with“选择你刚才添加的站点：\r\n
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$\"wps_clip_image-14557\"$ \r\n
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然后选择“Chromium JavaScript Remote Debugger”，然后一直下一步，安装完后会提示重启Eclipse，重启Eclipse后就可以开始调试了。\r\n

2、怎样调试Nodejs？

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从插件名称中的“Remote”可以预想到这是一个远程调试的工具，大概的流程就是node开一个tcp的调试端口，然后这个调试工具通过这个tcp端口来和node通讯实现调试。\r\n
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要启用node的调试端口，在执行node脚本的时候需要添加 –-debug 参数：\r\n

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node --debug[=port] NodeApp.js\r\n
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or\r\n
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node --debug-brk[=port] NodeApp.js

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其中port为开启的调试端口，默认为5858.\r\n
--debug和--debug-brk的区别在于，--debug执行脚本的时候会直接运行该脚本，而--debug-brk执行脚本的时候，并不会马上执行，而是等待调试器的连接，然后按调试器的指令来执行。\r\n
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我们写个简单的代码来用于调试：\r\n
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$\"wps_clip_image-17441\"$ \r\n
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然后用 node –debug hello_world.js 来运行：\r\n
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$\"wps_clip_image-17588\"$ \r\n
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可以看到输出一行：debugger listening on port 5858\r\n
5858为默认端口，你也可以用 --debug=5859 来指定不同的端口\r\n
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好，现在node的调试模式已经运行起来了，我们去配置Eclipse来连接到node并进行调试。\r\n
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首先我们要到debug config里面去添加一个新的V8 VM的调试配置：\r\n
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$\"wps_clip_image-18682\"$ \r\n
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右键，选择“new”来新建一个配置项：\r\n
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$\"wps_clip_image-18917\"$ \r\n
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因为我们刚才node起的调试端口为默认的5858，所以这里我们的端口就是5858，名称我们定为“Node-5858”。\r\n
\r\n
然后点debug开始调试，或者你使用下面的方式开始调试：\r\n
\r\n
$\"wps_clip_image-20213\"$ \r\n
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调试模式大概会是这样：\r\n
\r\n
$\"wps_clip_image-20478\"$ \r\n
\r\n
（注：这是调试视图，点击右上角的臭虫按钮。如果你的Eclipse上没有这个按钮，请点击上图右上角臭虫左边的添加按钮，找到debug然后添加就可以）\r\n
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在调试模式连接成功后，你会在你的“Project Explorer”里面看到多了一个“Node-5858”（刚才debug config里面设置的名称）的项目，里面的文件都是调试的文件或者调试的文件require进来的文件。\r\n
打开这些文件，你就可以在里面加断点开始调试了。例如上图的第8行加了一个断点，则每次在浏览器访问的时候都会进入这个断点。\r\n
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$\"wps_clip_image-21004\"$ \r\n
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其他的调试和你平时用Eclipse调试其他代码是一样的。\r\n
Eclipse的调试快捷键是，F5单步进入，F6单步跳过。\r\n
\r\n
最后说一下 --debug-brk 方式启动的调试模式：\r\n
\r\n
$\"wps_clip_image-22682\"$ \r\n
\r\n
可以看到仅仅是输出了一行“debugger listening on port 5858”而已，后面并没有继续输出“Server running at …..”。\r\n
这是因为用启动的调试模式并不会马上执行代码，而是会等待调试器的连接（可以理解为在hello_world.js的第一行加了断点），具体还是各位童鞋自己实践吧。\r\n
\r\n
参考： https://github.com/joyent/node/wiki/Using-Eclipse-as-Node-Applications-Debugger\r\n
\r\n
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