Wget to null windows

Collectives on Stack Overflow. Learn more. Asked 8 years, 4 months ago. Active 5 years, 1 month ago. Viewed 7k times. I would like to download a file to null in windows cli just for testing purposes. Is there any way to do this in command prompt or power shell in windows 7? RokX RokX 6 6 silver badges 16 16 bronze badges. Add a comment. Active Oldest Votes. Community Bot 1 1 1 silver badge. I re-tried many times and each time it wrote 0-byte files at random, not failing on the same files each time.

The frustrating part is there are no errors anywhere, so nothing gets caught in the error log The files are meant to be overwritten, as they become out-of-date every 24 hours, and even "good data" from the day before is "bad data" today. Is there anywhere I could improve my script to check filesize or whatever before downloading? I tried on my Mac at home and got the same exact result, even using "spider mode" to check if it exists first. I take it "retries" won't help as wget is not running into any HTTP errors anyway.

You might want to try turning on wget 's debug switch -d to see what's going on. Before downloading wouldn't make any sense, because obviously the server fails to properly reply to your download requests. It should either return the proper file or it should return a HTTP error code, but apparently it does neither. Instead, use a loop in your script to loop through all the files you want to download. Download each file with a single wget request, and then check the file size of the file you have downloaded.

If it is a 0 byte file and you are sure that it shouldn't be, repeat the request. You should of course add a failsafe limit so your script won't repeat the request endlessly if it always fails, and maybe also a delay in case the server is rate limiting your requests and failing them intentionally. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

I was hoping somebody unbiased would point it out, but My answer is really the correct way to do this : — Nacht. Peter Lamby Peter Lamby 1 1 silver badge 3 3 bronze badges. In sh , which is usually what cron uses, the ampersand redirect does not work. You say you only need the " OK" response in a comment.

Combining that, wget will neither output anything to stderr, nor save a document. Volker Siegel Volker Siegel 9 9 bronze badges. I like this approach as well. I appreciate your feedback and answer. May your question should be about this, the webpage says: A fast and robust web server and application server for This shouldn't require any keepalive scripts. Otherwise kasperd's solution is perfect. Thanks for the feedback, although it isn't very constructive.

Application servers do fail - although it's usually not the container's fault. I agree it shouldn't require any cronjobs to keep it alive.

I've had passenger fail or hang for 2 minutes at a time when there's no load, so requesting the url keeps passenger fired up for now. It would be good to understand, what it is that is being kept alive by the wget commands. In many situations the need for keep alive messages is a symptom of an underlying design flaw which should be fixed.

But even if all of those are fixed, there will still be a few cases left where a keep alive message is the right solution. Even if keep alive messages are not needed, the cron job could still be a useful part of a monitoring setup. Depending on the installation options selected, it should be as follows:.

What we need to do is open a command prompt. Once there, use the CD command to navigate to the file location mentioned above. Then type Wget to use the program. We have correctly installed Wget. However, to be able to use it we always have to navigate to the installation folder of the program. This is cumbersome, so if we want to use Wget from any directory, we need to add an environment variable.

Next, we are going to create a new environment variable. With that intention, please select Path and press Edit. On the next screen first select New, then Browse. You must select the address where the program is installed. Press ok in each of the open windows, and we can run Wget every time we open a Command Prompt. With this intention, we enter this command in the CMD. We have already seen how to use bash in windows