5/19/2023 0 Comments Nodejs sleep![]() To use request with promises, install it like this: npm install requestĪnd then require("request-promise-native") in your code, like in the example above. In the example below, the greeting function accepts two argumnets, phrase and name. You can also pass further optinal parameters to setTimeout (). Once that one second has passed, the code in setTimeout () runs. Return new Promise(resolve => setTimeout(resolve, millis)) Ĭonst urls = await fetchUrls(INITIAL_URL) Instead, that line is skipped for the time being, and the line console.log ('Good Afternoon') is executed. The sleep function is pretty straightforward: async function sleep(millis) millis - how long to sleep in milliseconds Also, many sleep () solutions are only for Windows or only for Linux. Existing sleep () solutions use a blocking while loop which uses 100 CPU. works on every platform x86 + 圆4 Windows / Linux / OSX. This is impossible to do without violating variable declaration stability. is often used to relax the system in between resource intensive tasks. The re-entrance to the coroutine is triggered by a timer. ![]() Unlike the sleep function in languages that supports multi-threading, the the event loop to be handled. ![]() These calls will block execution of all JavaScript by halting Node. Note that because this is a C++ module, it will need to be built on the system you are going to use it on. Much better, isn't it? Before I get into the details of how fetchPage() and fetchUrls() work, let's first answer your question of how to wait before fetching the next page. I think the easiest solution is to implement a sleep function in Node. Add sleep(), msleep() and usleep() to Node.js, via a C++ binding. ![]() For instance, this would be your main function: const urls = await fetchUrls(INITIAL_URL) I am a big fan of the async library and I've used for a long time. Delaying multiple page fetches with async/await
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