How do I check if a file on a website exists?

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John
John 2012-10-24
评论： Ali Abed 2017-10-15
I want to read in image files from my online database.
I would like to check my website to see if the file exists before attempting to load it into the workspace.
For Example I would like to do (simplified):
E = exist('http://www.mywebsite.com/images/1.png);
if E ~= 0
IMG = imread('http://www.mywebsite.com/images/1.png);
else
IMG = zeros(X,Y);
end
Thanks in Advance!

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采纳的回答

Sean de Wolski
Sean de Wolski 2012-10-24
You could just use a try/catch block.
try
IMG = imread('http://www.mywebsite.com/images/1.png);
catch
IMG = zeros(X,Y);
end
  1 个评论
John
John 2012-10-24
Thanks for the fast response... I didn't know that try and catch blocks existed. This is going to help me a lot with loads of other codes!

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更多回答（1 个）

Erick Oberstar
Erick Oberstar 2015-12-15
you can use urlread also
[str,status] = urlread('http://www.mywebsite.com/images/1.png');
if status
IMG = imread('http://www.mywebsite.com/images/1.png');
else
disp('URL read of link was unsuccessful')
end

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