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psyced/world/net/library/uniform.c

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// $Id: uniform.c,v 1.43 2008/03/29 20:36:43 lynx Exp $ // vim:syntax=lpc
//
// URLs.. URIs.. UNLs.. UNIs.. maybe even URNs..
// the fact they wear a uniform is the only thing these items have in common
// after all.. they are not always resources, not always locators,
// not always identificators.. but one thing is for sure, they have a
// common format.. the uniform :)
//
// TODO: first move everything called _uniform or url somewhere into here
// then rename everything into uniform, also uniform.c and uniform.h..
#include <net.h>
#include <uniform.h>
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// is_formal is similar to this
string legal_url(string url, string scheme) {
if (scheme &&! abbrev(scheme+":", url)) return 0;
if (index(url, '"') >= 0) return 0;
if (index(url, ' ') >= 0) return 0; // just
if (index(url, '\t') >= 0) return 0; // paranoid
return url;
}
/** pass it a URL string and it will find out if that string
** is a uniform, and if so return an array as defined in uniform.h
**
** <fippo> what about using
** http://www.gbiv.com/protocols/uri/rfc/rfc3986.html#regexp ?
** <lynX> sweet, i really like that. can we do that?
** only we have to change that regexp a lot. like we don't
** need $1, $6 and $8, we need USlashes instead of $3, but
** what's tough is, we need UQuery to support ; or ? and
** we need UUser, UPass, UPort, UTransport, and UHostPort.
** all of that isn't in that regexp yet...
*/
varargs array(mixed) parse_uniform(string url, vaint tolerant) {
array(string) u = allocate(USize);
string t;
string s;
u[UString] = url;
if (sscanf(url, "%s:%s", u[UScheme], t) != 2) {
if (tolerant) t = url;
else return 0;
}
ASSERT("parse_uniform w/out scheme", u[UScheme] || tolerant, url)
P3(("parse_uniform %s of %O (tolerant: %O)\n",
url, u[UScheme], tolerant))
if (abbrev("//", t)) {
t = t[2..];
u[USlashes] = "//";
} else u[USlashes] = "";
switch(u[UScheme]) {
case "sip":
sscanf(t, "%s;%s", t, u[UQuery]);
break;
case "telnet":
break;
case "psyc":
sscanf(t, "%s#%s", t, u[UChannel]);
break;
#if 0 //def MUCSUC
case "xmpp":
sscanf(t, "%s#%s", t, u[UChannel]);
break;
#endif
//case "mailto":
default:
sscanf(t, "%s?%s", t, u[UQuery]);
}
u[UBody] = t;
sscanf(t, "%s/%s", t, u[UResource]);
#if 0
// int n;
if (-1 != (n = member(u[UResource], '#'))) {
u[UChannel] = u[UResource][n+1..]; // strlen checken??
}
#endif
u[UUserAtHost] = t;
if (sscanf(t, "%s@%s", s, t)) {
unless (sscanf(s, "%s:%s", u[UUser], u[UPass]))
u[UUser] = s;
}
u[UHostPort] = t;
// if (complete) u[UCircuit] = u[UScheme]+":"+u[UHostPort];
u[URoot] = u[UScheme]+":"+u[USlashes]+u[UHostPort];
if (sscanf(t, "%s:%s", t, s)) {
unless (sscanf(s, "%d%s", u[UPort], u[UTransport]))
u[UTransport] = s;
unless (strlen(u[UTransport])) u[UTransport] = 0;
}
u[UHost] = t;
P4(("parse_uniform %s = %O (tolerant: %O)\n", url, u, tolerant))
u[UNick] = u[UUser]
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|| (strlen(u[UResource]) && u[UResource][1 ..]);
// || u[UBody]; -- not so good
return u;
}
string render_uniform(array(mixed) u) {
string s, t;
// wird aufgerufen wenn dieser string nicht mehr gültig ist:
// if (u[UString]) return u[UString];
unless (s = u[UHost]) return 0;
if (u[UUser]) s = u[UPass] ? (u[UUser]+":"+u[UPass]+"@"+s)
: (u[UUser]+"@"+s);
if (u[UScheme]) s = u[UScheme]+"://"+s;
t = u[UPort] ? to_string(u[UPort]) : "";
if (u[UTransport]) t += u[UTransport];
if (t != "") s += ":"+t+"/";
if (u[UResource]) s += u[UResource];
if (u[UChannel]) s += "#"+ u[UChannel];
if (u[UQuery]) s += "?"+ u[UQuery];
D2( if (u[UString] == s) D("render_uniform: das war umsonst..\n"); )
P3(("render_uniform %O = %s\n", u, s))
return u[UString] = s;
}
// convert GENERIC psyc url stringp()s to objects (if local)
#if 0
mixed urlobject(string url) {
array(mixed) u;
object o;
// we avoid errors! we rule!
u = parse_uniform(url);
unless (query_udp_port() == (u[UPort] || PSYC_PORT))
return url;
unless (u[UHost] == __HOST_IP_NUMBER__
|| lower_case(u[UHost]) == lower_case(SERVER_HOST))
return url;
if (u[UResource][0] == '~')
o = find_person(u[UResource][1..]);
else if (u[UUser]) o = find_person(u[UUser]);
else o = find_object(u[UResource]);
unless(objectp(o)) return url;
return o;
}
#endif