将Node本机模块部署到Azure WebSites
[英]Deployment of Node native modules to Azure WebSites
问题描述
I'm trying to deploy the following sample node application to an Azure website: 
我正在尝试将以下示例节点应用程序部署到Azure网站：
var http = require('http');
var port = process.env.port || 1337;
http.createServer(function (req, res) {
res.writeHead(200, { 'Content-Type': 'text/html' });
try {
var canvasModule = require('canvas'),
canvas = new canvasModule(200, 200),
ctx = canvas.getContext('2d');
ctx.rotate(0.5);
ctx.font = '30px Impact';
var message = "Hello World";
ctx.fillText(message, 40, 40);
ctx.strokeRect(30, 5, 160, 50);
res.end('<html><img src="' + canvas.toDataURL() + '" /></html>');
} catch (e) {
res.end('Error: ' + e);
}
}).listen(port);
The tricky part is that I'm using a node module called " canvas " that needs to be compiled at install time using node-gyp. 棘手的部分是我正在使用一个名为“ canvas ”的节点模块，需要在安装时使用node-gyp进行编译。
According to this Microsoft page native modules are not supported on Azure Web-sites and the compiled version of the module should be copied to Azure for the app to work properly: 根据此 Microsoft页面，Azure网站不支持本机模块，并且应将模块的已编译版本复制到Azure以使应用程序正常工作：
Native Modules
While most modules are simply plain-text JavaScript files, some modules are platform-specific binary images.
Since Azure Cloud Services rely on the node_modules folder being deployed as part of the application, any native module included as part of the installed modules should work in a cloud service as long as it was installed and compiled on a Windows development system.
Native modules are not supported with Azure Web Sites.
I deployed everything to Azure (using the publishing Wizard) and all the files were sent to Azure (apparently at least), including the compiled modules. 我将所有内容部署到Azure（使用发布向导），所有文件都发送到Azure（显然至少），包括已编译的模块。 When running the site on Azure I obtain the following exception: 在Azure上运行站点时，我获得以下异常：
Error: The specified module could not be found.
D:\home\site\wwwroot\node_modules\canvas\build\Release\canvas.node
But that file is in-fact deployed on the server: 但该文件实际上部署在服务器上：
Creating a VM would obviously be an option but I would prefer to use web-sites. 创建VM显然是一种选择，但我更喜欢使用网站。 Anyone has any idea that I can try out? 任何人都知道我可以试试吗？
3 个解决方案
解决方案1
5 已采纳 2014-08-06 01:02:40
The error message ""The specified module could not be found" is a bit misleading. It can mean one or more dependent dlls are not found. 错误消息“”无法找到指定的模块“有点误导。它可能意味着找不到一个或多个相关的dll。
I assumed you used the build instruction in Windows. 我假设您在Windows中使用了构建指令 。 If you built canvas against the GTK2 zip file in the instruction, you can copy %GTKDIR%\\bin\\freetype6.dll to %YourApp%\\node_modules\\canvas\\build\\Release. 如果您在指令中针对GTK2 zip文件构建了canvas，则可以将％GTKDIR％\\ bin \\ freetype6.dll复制到％YourApp％\\ node_modules \\ canvas \\ build \\ Release。 This dll is not copied during the build process. 在构建过程中不会复制此dll。 You would need to do this deploying to a VM as well. 您还需要将此部署到VM。 Or you can build canvas against the Windows GTK3 bundle . 或者您可以针对Windows GTK3软件包构建画布。
And unfortunately even after you have all the dll, the sandbox of Azure Websites seems to prevent canvas from running. 不幸的是，即使你拥有了所有的dll，Azure网站的沙箱似乎也阻止了画布的运行。 Hopefully it would be enabled in the near future. 希望它能在不久的将来启用。
解决方案2
2 2014-10-23 19:29:47
Alright got this working today! 好吧今天就搞定了！
You need to deploy your node_modules directory, in addition to that you need to copy all the contents gtk/bin to the root of your application, which makes it a bit messy, but it works. 你需要部署你的node_modules目录，除了你需要将所有内容gtk/bin复制到你的应用程序的根目录，这使它有点乱，但它的工作原理。 I imagine you could change the path to look elsewhere but I needed to get the app running so I didn't investigate any further. 我想你可以改变寻找其他地方的路径，但我需要让应用程序运行，所以我没有进一步调查。
解决方案3
0 2014-08-06 02:04:08
That last line in @mtian's answser is key. @ mtian的回答中的最后一行是关键。 You can spend time getting it to deploy but ultimately the Azure Website VMs lack the GDI+ APIs that node-canvas relies on to execute (presumably blocked for security considerations). 您可以花时间部署它，但最终Azure网站虚拟机缺少节点 - 画布依赖执行的GDI + API（可能出于安全考虑而被阻止）。 If you want node-canvas on Azure, you can't use Azure Websites and will instead need to setup and manage your own VMs. 如果您想在Azure上使用node-canvas，则无法使用Azure网站，而是需要设置和管理自己的VM。
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.