Vince Yuan's code is great but it seems to be something wrong. But we don't check the result if callback callback err. Feel Physics Feel Physics 2, 4 4 gold badges 23 23 silver badges 36 36 bronze badges. I prefer request because you can use both http and https with it. Looks like Request has been deprecated github. No new changes are expected to land.
In fact, none have landed for some time. Wai Ha Lee 7, 61 61 gold badges 56 56 silver badges 85 85 bronze badges. Idan Dagan Idan Dagan 7, 3 3 gold badges 28 28 silver badges 38 38 bronze badges. Roman Podlinov Roman Podlinov Very clean, thank you. What do the flags 'wx' do when you're creating the writeStream? It is returning garbage character if file name is other than ascii like if filename is in japanese.
Do you think ajax-request is not a third party library? Download using promise, which resolve a readable stream. The questions was specific to not include third party modes : — David Gatti. If you are using express use res. A 13k 4 4 gold badges 90 90 silver badges bronze badges. Using the http2 Module I saw answers using the http , https , and request modules.
I'd like to add one using yet another native NodeJS module that supports either the http or https protocol: Solution I've referenced the official NodeJS API, as well as some of the other answers on this question for something I'm doing. Rik Rik 3 3 silver badges 8 8 bronze badges. Is this backward compatible? Works everywhere or only for http2? Neil I'm assuming you are asking if http2 is backward compatible with http1.
Because http2 improves framing; adding binary compression, the ability to push from server to client, and simultaneous connections - it is absolutely required that both server and client know the implementation this allows abstraction of implementation from the application too.
Good news is that all major browsers have supported http2 since about - and Node as a client does too. Node, Nginx, and Apache offer it server side - so most use cases are covered. Its a vast improvement.
Thanks for the reply Rik — Neil. Without library it could be buggy just to point out. Here my suggestion: Call system tool like wget or curl use some tool like node-wget-promise which also very simple to use. Geng Jiawen Geng Jiawen 7, 2 2 gold badges 41 41 silver badges 36 36 bronze badges.
Writing my own solution since the existing didn't fit my requirements. Alex Pilugin Alex Pilugin 2 2 gold badges 9 9 silver badges 30 30 bronze badges. Pankaj Pankaj 1 1 gold badge 3 3 silver badges 9 9 bronze badges.
Frankenmint Frankenmint 1, 1 1 gold badge 17 17 silver badges 30 30 bronze badges. Like: res. Jeremy M. Yin Yin 9. I suggest you to use res. Mehrzad Tejareh 4 4 silver badges 18 18 bronze badges. Vivek Narayan Vivek Narayan 1 1 1 bronze badge. Add the following highlighted lines at the end of the file:. To call the functions, you first create a wrapper function with async function.
Since the await keyword can not be used from the global scope as of the writing of this tutorial, you must wrap the asynchronous functions in an async function. Notice that this function is anonymous, meaning it has no name to identify it. Your openFile and addGroceryItem functions are asynchronous functions. Without enclosing these calls in another function, you cannot guarantee the order of the content.
The wrapper you created is defined with the async keyword. Within that function you order the function calls using the await keyword. Finally, the async function definition is enclosed in parentheses. These tell JavaScript that the code inside them is a function expression. The parentheses at the end of the function and before the semicolon are used to invoke the function immediately.
By using an IIFE with an anonymous function, you can test that your code produces a CSV file with three lines: the column headers, a line for eggs , and the last line for nutella. Your call to openFile created a new file and added the column headings for your CSV.
The subsequent calls to addGroceryItem then added your two lines of data. With the writeFile function, you can create and edit files. Next, you will delete files, a common operation when you have temporary files or need to make space on a hard drive. In this step, you will delete files with the unlink function in the fs module. You will write a Node. Now you will write code that creates an asynchronous deleteFile function.
That function will accept a file path as an argument, passing it to the unlink function to remove it from your filesystem. The unlink function accepts one argument: the file path of the file you want to be deleted. Warning: When you delete the file with the unlink function, it is not sent to your recycle bin or trash can but permanently removed from your filesystem. This action is not reversible, so please be certain that you want to remove the file before executing your code.
To confirm that the file no longer exists, use the ls command in your current directory:. The following section uses a function to move files to different folders. After learning that function, you will be able to do the most critical file management tasks in Node. Folders are used to organize files, so being able to programmatically move files from one folder to another makes file management easier. You can move files in Node.
Before you can code your Node. In your terminal, create a test-data folder in your current directory:. Now, copy the greetings. In your Node. When using the rename function, you need to provide the file path of the original file and the path of the destination location.
As mentioned earlier, the rename function takes two arguments: the source and destination file paths. This function can move files to other folders, rename a file in its current directory, or move and rename at the same time. In your code, you are moving and renaming your file. I write about modern JavaScript, Node. The newsletter is sent every week and includes early access to clear, concise, and easy-to-follow tutorials, and other stuff I think you'd enjoy!
No spam ever, unsubscribe at any time. How to download a file in Node. If a file already exists with the name, the file gets overwritten with a new file.
Care has to be taken while using this function, as it overwrites existing file. If the file specified in the appendFile function does not exist, a new file is created with the content passed to the function. If the specified file is not found, a new file is created with the specified name and mode and sent to the callback function.
Step 2 : Create file using one the methods mentioned above. Following are the examples demonstrating to create a file in Node.
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