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| author | Jarkko Hietaniemi <jhi@iki.fi> | 2003-08-13 06:06:39 +0000 |
|---|---|---|
| committer | Jarkko Hietaniemi <jhi@iki.fi> | 2003-08-13 06:06:39 +0000 |
| commit | 932f293e96b6dc4df3c34cd2faff050d6cfaca84 (patch) | |
| tree | 7747071f27823bb72ffeebe11bbbee14e3cbd53f /pod/perlport.pod | |
| parent | bf003f36c95d33bd8370fb1448949e8ea247aefc (diff) | |
| download | perl-932f293e96b6dc4df3c34cd2faff050d6cfaca84.tar.gz | |
More don't:s for nyetworking.
p4raw-id: //depot/perl@20669
Diffstat (limited to 'pod/perlport.pod')
| -rw-r--r-- | pod/perlport.pod | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/pod/perlport.pod b/pod/perlport.pod index 73a6616861..c6f0c4a643 100644 --- a/pod/perlport.pod +++ b/pod/perlport.pod @@ -494,13 +494,26 @@ Don't assume that you can reach the public Internet. Don't assume that there is only one way to get through firewalls to the public Internet. +Don't assume that you can reach outside world through any other port +than 80, or some web proxy. ftp is blocked by many firewalls. + Don't assume that you can reach yourself or any node by the name -'localhost'. The same goes for '127.0.0.1'. +'localhost'. The same goes for '127.0.0.1'. You will have to try +both. + +Don't assume that the host has only network card, or that it can't +bind to many virtual IP addresses. + +Don't assume a particular network device name. Don't assume that any particular port (service) will respond. Don't assume that you can ping hosts and get replies. +All the above "don't":s may look daunting, and they are -- but the key +is to degrade gracefully if one cannot reach the particular network +service one wants. Croaking or hanging do not look very professional. + =head2 Interprocess Communication (IPC) In general, don't directly access the system in code meant to be |