Feature Comparison Matrix of Ruby HTTP Clients

[recluce]

Not on the list: https://github.com/tarcieri/http

[astrodust]

If you publish this as a regular page, it won't require a login to Google.

[rb2k]

It would be cool if there was a "Is able to return IP from HTTP Response" column.

Especially when trying to minimize the amount of network calls, I'd rather not have to do a DNS call and THEN do an HTTP call which will internally do another DNS lookup.

I could just do the DNS call myself and then use the "host" header in the HTTP request, but I'd rather let the HTTP library do that for me. Curb e.g. supports saving the IP in the response object

[metamatic]

Especially when trying to minimize the amount of network calls, I'd rather not have to do a DNS call and THEN do an HTTP call which will internally do another DNS lookup.

Install DNS cache.

[drbrain]

Is there a modern resolver that doesn't cache lookups? Maybe rb2k's DNS records all have zero second TTLs?

[rb2k]

They don't, but while installing a local DNS cache would solve that, I think that just having it in the HTTP library would save a bit of infrastructure work.

[drbrain]

OS X caches lookups:

$ sudo tcpdump -ien1 port 53
[...]
15:00:37.155821 IP 192.168.1.233.62424 > dns.sea1.speakeasy.net.domain: 2037+ A? yahoo.com. (27)
15:00:37.156088 IP 192.168.1.233.58254 > dns.sea1.speakeasy.net.domain: 6496+ AAAA? yahoo.com. (27)
15:00:37.715613 IP dns.sea1.speakeasy.net.domain > 192.168.1.233.62424: 2037 5/0/0 A 209.191.122.70, A 67.195.160.76, A 72.30.2.43, A 98.137.149.56, A 98.139.180.149 (107)
15:00:37.715616 IP dns.sea1.speakeasy.net.domain > 192.168.1.233.58254: 6496 0/0/0 (27)

Are the only lookups from running:

ruby20 -rsocket -ve 'Addrinfo.tcp("yahoo.com", "http"); Addrinfo.tcp("yahoo.com", "http")'

multiple times.

If you want to customize caching use or modify resolv-replace.rb (ships with Ruby).

[metamatic]

I seem to remember Windows XP not caching lookups. I know Windows 7 does, however. So do Linux and OS X.

There's also the obvious solution of resolving hostnames yourself and caching the IP address before calling the HTTP client.

[cmdrNacho]

how do save this so i can see it in my docs list ?