![]() In Node js, there is no such start-the-event-loop call. Typically behavior is defined through callbacks at the beginning of a script and at the end starts a server through a blocking call like EventMachine::run(). In other systems, there is always a blocking call to start the event-loop. It presents an event loop as a runtime construct instead of a library. Node.js is similar in design to and influenced by, systems like Ruby's Event Machine or Python's Twisted. Because nothing blocks, scalable systems are very reasonable to develop in Node. Almost no function in the app directly performs I/O, so the process never blocks. Furthermore, users of Nodejs are free from worries of dead-locking the process, since there are no locks. Thread-based networking is relatively inefficient and very difficult to use. This is in contrast to today's more common concurrency model where OS threads are employed. Upon each connection, the callback is fired, but if there is no work to be done, Node for macOS will sleep. In the following "hello world" example, many connections can be handled concurrently. set("Content-Type", "application/ an asynchronous event-driven JavaScript runtime, Node for Mac is designed to build scalable network applications. ![]() Then this is the Express code that sends the CSV to the user in the response: const buffer = await generateWorkbook(csvData, styleInfo) Here is the ExcelJs code that being returned from the script that actually creates the CSV (with all the CSV logic excluded): return await () But on my windows computer, what happens is when I click the link, a new tab temporarily opens, then closes. ![]() I'm sending the users an email using Sendgrid and putting the params in a link in the email that dynamically generates the CSV. ![]() I'm using Express and ExcelJs to create a CSV that users can download. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |