问题
I am having a small trouble with mod rewrite. A friend of mine is writing a script that allows you to upload images.
What we want to do is allow the user to append a domain name to a direct image link, and the script would retrieve the image from the supplied URL.
For example, if the image is at: http://www.test.com/image.jpg, adding domain.com/http://www.test.com/image.jpg would allow a script to retrieve that url (test.com) to get the image we want.
EDIT: HTTP is in front of the URL because I don't want the user to have to remove the HTTP manually. They see an image in their browser, they append "domain.com" before it, http and all and the script retrieves that image and stores it on our server.
The rule I am using is:
RewriteRule ^([\w|.|/]+(jpg|png|gif))$ /upload.php?url=http://$1 [B,L,NC,R=302]
this correctly matches URLs but the colon in http:// causes problems.
If the user inputs: domain.com/www.test.com/image.jpg, it works.
If the user inputs: domain.com/http://www.test.com/image.jpg, it doesn't work and I get a 403 forbidden page (XAMPP on Windows).
If the user inputs: domain.com/http//www.test.com/image.jpg, it works (no colon in http).
EDIT: By working, I mean if I test it locally, I get to see the URL I pass in a $_GET['url'] parameter correctly, instead of seeing an error 403.
Can you please tell me what is wrong with this rule and how to fix it? Or any alternative solutions to achieve the behavior we want?
Thank you.
回答1:
Well, I think I've found the problem. It wasn't the regex, nor mod_rewrite itself.
So it's a bug in Apache on Windows that has been declared WONTFIX.
For reference, see this StackOverflow thread: and this bug report
I'm posting what I found and will consider this question answered. Thank you all!
回答2:
You could use urlencode() in php
回答3:
This approach is cumbersome, error prone and insecure (for example, an image URL isn't required to end with those well known file extensions)
If I understand your use case, it starts when the user is surfing the web and he's viewing an image, and he wants to share it via your service. Then he types by hand http://your.sharing.service in the browser's address bar, just before any text. Then you use mod_rewrite to trigger your script, but I think your regex (and your service too) will fail in a number of unpredictable ways.
I never used a service like this, and I think that the standard approach of using a button to submit the URL to some script (let's say http://my.service.com/upload?url=...) should be preferred.
回答4:
The problem is in your regex...
Try:
^((http|https)+[\:\/\/\w\.]+(jpg|png|gif))$
来源：https://stackoverflow.com/questions/10440048/mod-rewrite-and-passing-a-url-as-parameter