Check for active web pages with open-uri

Ruby
1

I’m using openuri module to open web pages. If the pages doesn’t exist I
get an error:
in `initialize’: getaddrinfo: no address associated with hostname.
(SocketError)

then I get a whole bunch of other stuff. Is there a parameter to use so
that open() returns a true or false value if the page exists or not?
Basically I’m looking through a list of web addresses and I want to
store the active pages and throw away the non active pages. So if the
page doesn’t exist I want to be able to move on in the script.

2

Chuck D. wrote:

I’m using openuri module to open web pages. If the pages doesn’t exist I
get an error:
in `initialize’: getaddrinfo: no address associated with hostname.
(SocketError)

then I get a whole bunch of other stuff. Is there a parameter to use so
that open() returns a true or false value if the page exists or not?
Basically I’m looking through a list of web addresses and I want to
store the active pages and throw away the non active pages. So if the
page doesn’t exist I want to be able to move on in the script.

Why not use rescue to catch the SocketError?

3

Tim H. wrote:

Chuck D. wrote:

I’m using openuri module to open web pages. If the pages doesn’t exist I
get an error:
in `initialize’: getaddrinfo: no address associated with hostname.
(SocketError)

then I get a whole bunch of other stuff. Is there a parameter to use so
that open() returns a true or false value if the page exists or not?
Basically I’m looking through a list of web addresses and I want to
store the active pages and throw away the non active pages. So if the
page doesn’t exist I want to be able to move on in the script.

Why not use rescue to catch the SocketError?

If I use rescue will the script return back to normal flow without
exiting? I don’t want the script to exit.

4

Chuck D. wrote:

store the active pages and throw away the non active pages. So if the
page doesn’t exist I want to be able to move on in the script.
Why not use rescue to catch the SocketError?

If I use rescue will the script return back to normal flow without
exiting? I don’t want the script to exit.

If that’s what you want it to do. The idea is that your rescue block
gets control when a SocketError occurs. What happens after that is up to
you.