How to truncate URL string to filename?

[theLastSlacker]

Yup, I'm a newbie.

I've looked up some of the functions, but I can't seem to put them together. Could someone lay it all out in simple terms?

[Dr. Bebop]

What do you mean by truncate a URL to a file name?

[endo]

if truncate is the same as concatenation. look up strcat(.....) found in string.h

[theLastSlacker]

Originally posted by Dr. Bebop
What do you mean by truncate a URL to a file name?

Sorry. I'm trying to write a simple wget frontend (common newbie project, I suspect). I have a full url stored in a string, and I need to reduce it to just the filename:

http://www.host.com/pic01.jpg

to

pic01.jpg

As I said, I know it has something to do with reading the string backwards and finding the '/'; but I can't quite sort it out.

Thanks.

[Dr. Bebop]

If it's a C string you can use the functions in <cstring>.

#include <iostream>
#include <cstring>
using namespace std;

int main()
{
        char *URL = "http://www.host.com/pic01.jpg";
        char *file_name;

        file_name = strrchr( URL, '/' ) + 1;

        cout<< file_name <<endl;

        return 0;
}

[crystalike]

Should consider the case when there are more than one"/" in the URL, I did similar thing in a project on linux. I used GnuString,which is very easy.

As to the standard C++, just search for the last "/" then you got the file name

[theLastSlacker]

Thanks Dr. Bebop. Works great. I was thinking I'd need two functions, one to find the position of / and the other to do the truncation; so I was completely barking up the wrong tree.

crystalike: You're right, I should have chosen a better example. However, strrchr() does work with longer URL's, so I guess it must read the string backwards.