By Shelley Powers
* discover Node’s special approach to asynchronous improvement
* construct pattern Node functions with the specific framework and fix middleware
* Use NoSQL recommendations similar to Redis and MongoDB—and discover Node’s relational database modules
* paintings with PDF documents, serve HTML5 media, and create pix with Canvas
* arrange bidirectional communique among browser and server with WebSockets
* study in-depth practices for debugging and checking out your purposes
* installation Node purposes within the cloud or by yourself approach
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Additional resources for Learning Node
That variables are private to the module. In the next several sections, we'll see how Node adheres to these requirements. Loading a Module with Require and Default Paths Node supports a simple module loading system: there is a one to one correspondence between file and module. spawn; Modules that are core modules—native to Node—or loaded from the node_modules folder can be loaded just by providing the module identifier, such as 'http' for the HTTP module. Modules not part of core, or not included in the node_modules folder should include forward slashes to indicate path.
The application also makes use of readFileSync, the synchronous version of the function to open a file and read its contents. Example 3-4. request object. globalAgent, which supports pooled sockets. maxSockets value. The client accepts the chunked data returned from the server, printing out to the console. It also triggers a response on the server with a couple of minor writes, as shown in Example 3-5. Example 3-5. request object because the connection is already closed when the asynchronous function is called and no file contents are returned.
It wasn't until recently that the Windows binary installation of Node even provided access to child processes. exe. An example of running a Windows command is shown in Example 3-10. exe is used to create a directory listing, which is then printed out to the console via the data event handler. Example 3-10. exe instructs it to carry out the command and then terminate. The application doesn't work without this flag. exe to execute the application and then remain because your application won't terminate.