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在运行时在node.js中启用和声代理

[英]Enable harmony proxies at runtime in node.js

原文 2013-06-30 20:57:45 1 2 javascript/ node.js/ ecmascript-harmony

I have a little RPC library for node, and right now it uses harmony proxies for remote objects if they are available (by checking for the existence of a Proxy global). 我有一个用于节点的RPC库，现在它对远程对象使用和谐代理（ 如果它们可用） （通过检查Proxy全局的存在）。

I'd like to be able to turn harmony proxies on at runtime, that is, in a node process that was not started with the --harmony-proxy flag. 我希望能够在运行时打开和谐代理，即，在不是以--harmony-proxy标志启动的节点进程中。 Is this possible? 这可能吗？

I understand that there are good reasons not to do this, and I don't really care :-P 我知道有充分的理由不这样做，而且我也不在乎:-P

EDIT As pointed out in the answers, node.js proxies use an older spec. 编辑正如答案中指出的那样，node.js代理使用较旧的规范。 I can use a shim like https://github.com/tvcutsem/harmony-reflect to work around this, but this still requires the --harmony flag to enable the underlying proxy support, and I want to know whether it's possible to enable that at runtime in a process started without the --harmony flags. 我可以使用类似https://github.com/tvcutsem/harmony-reflect的填充程序来解决此问题，但这仍然需要--harmony标志来启用基础代理支持，我想知道是否有可能启用在运行时启动的进程中没有--harmony标志。

2 个解决方案

The version of Proxy is depend on whether you use master or v0.10 . Proxy的版本取决于您使用master还是v0.10 。 Latest stable ( v0.10 ) uses the 3.14 branch, while development ( master ) stays with v8 bleeding_edge (currently at 3.20 ). 最新的稳定版（ v0.10 ）使用3.14分支，而开发（ master ）则停留在v8 bleeding_edge v0.10 （当前为3.20 ）处。 So the more correct question is, "what version of proxies has v8 implemented?" 因此，更正确的问题是“ v8实现了什么版本的代理？”

Work is being done on the proxy implementation, but it's a moving target right now. 代理实现方面的工作正在完成，但现在是一个移动的目标。 Referencing the proxy implementation ticket in the bug tracker ( http://code.google.com/p/v8/issues/detail?id=1543 ) it looks like another round of changes are coming. 引用错误跟踪器（ http://code.google.com/p/v8/issues/detail?id=1543 ）中的代理实施票证，似乎即将进行另一轮更改。 So be careful with upcoming development. 因此，请注意即将进行的开发。

As far as enabling proxies in the app and not the command line I believe you'll have to write a native module and use the V8::SetFlagsFromString method ( https://github.com/v8/v8/blob/f281162/include/v8.h#L4341-L4344 ). 至于在应用程序而不是命令行中启用代理，我相信您必须编写一个本机模块并使用V8::SetFlagsFromString方法（ https://github.com/v8/v8/blob/f281162/include /v8.h#L4341-L4344 ）。 If you need an example I might make time to whip one up. 如果您需要一个例子，我可能会花一些时间。