Invalid Host Name using wget?

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Shayma Al Ali
Shayma Al Ali 2023-3-28
回答： Walter Roberson 2023-3-28
Hi all! I'm trying to write a script where I loop through a text file containing urls, download the file, run a list of commands, and then delete the file (but save the output where I append the outputs to a variable after each loop).
I'm having issues with downloading the file using wget. It works if I type in the url code but it isn't working while trying to loop through the .txt file.
My code:
urltxt=importdata("6626048943-download.txt");
for r=1:length(urltxt)
URL=convertCharsToStrings(urltxt{r});
%urlname=cell2mat(urlname);
!echo 'machine urs.earthdata.nasa.gov login <uid> password <pswd>' >> ~/.netrc
!chmod 0600 ~/.netrc
%!wget --load-cookies ~/.urs_cookies --save-cookies ~/.urs_cookies --keep-session-cookies urlname
!PATH=/usr/local/bin:$PATH wget --load-cookies ~/.urs_cookies --save-cookies ~/.urs_cookies --keep-session-cookies "$URL"
end
In terminal, it works if I write:
URL=https://n5eil01u.ecs.nsidc.org/DP5/ATLAS/ATL03.005/2019.12.31/ATL03_20191231234802_00800610_005_01.h5
wget --load-cookies ~/.urs_cookies --save-cookies ~/.urs_cookies --keep-session-cookies "$URL"
so I don't think the wget line is the one not working. It's the way I'm saving the URL as I loop through the text file. How can I save the URL so it works properly?

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回答（1 个）

Walter Roberson
Walter Roberson 2023-3-28
!PATH=/usr/local/bin:$PATH wget --load-cookies ~/.urs_cookies --save-cookies ~/.urs_cookies --keep-session-cookies "$URL"
When you use the ! command then the entire line is sent literally to your command processor. The ' 'U' 'R' 'L'. Absolutely no substitution of values from the MATLAB workspace will take place.
If you want to substitute values from the MATLAB workspace then construct a command string and system() it. Or in this situation you could setenv('URL', URL) before the ! call

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