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#include <u.h>
#include <libc.h>
#include <bio.h>
#include <thread.h>
#include "plist.h"
#include "icy.h"
typedef struct Icyaux Icyaux;
struct Icyaux
{
Channel *newtitle;
int outfd;
int metaint;
};
static long
Breadn(Biobufhdr *bp, void *addr, long nbytes)
{
long n, r;
u8int *p;
for(n = 0, p = addr; n < nbytes; n += r, p += r){
if((r = Bread(bp, p, nbytes-n)) < 1)
break;
}
return n;
}
static void
icyproc(void *b_)
{
char *p, *s, *e;
Biobuf *b, out;
int n, r, sz;
Icyaux *aux;
threadsetname("icy/pull");
b = b_;
aux = b->aux;
Binit(&out, aux->outfd, OWRITE);
sz = aux->metaint > 4096 ? aux->metaint : 4096;
p = malloc(sz);
for(;;){
r = Breadn(b, p, aux->metaint > 0 ? aux->metaint : sz);
if(r < 1 || Bwrite(&out, p, r) != r)
break;
if(aux->metaint > 0){
if((n = 16*Bgetc(b)) < 0)
break;
if(Breadn(b, p, n) != n)
break;
p[n] = 0;
if((s = strstr(p, "StreamTitle='")) != nil && (e = strstr(s+13, "';")) != nil && e != s+13){
*e = 0;
if(sendp(aux->newtitle, strdup(s+13)) != 1){
free(s);
break;
}
}
}
}
free(p);
Bterm(b);
Bterm(&out);
chanclose(aux->newtitle);
threadexits(nil);
}
int
icyget(Meta *m, int outfd, Channel **newtitle)
{
char *s, *e, *p, *path, *d;
int f, r, n;
Icyaux *aux;
Biobuf *b;
path = strdup(m->path);
s = strchr(path, ':')+3;
if((e = strchr(s, '/')) != nil)
*e++ = 0;
if((p = strchr(s, ':')) != nil)
*p = '!';
p = smprint("tcp!%s", s);
free(path);
f = -1;
if((d = netmkaddr(p, "tcp", "80")) != nil)
f = dial(d, nil, nil, nil);
free(p);
if(f < 0)
return -1;
fprint(f, "GET /%s HTTP/0.9\r\nIcy-MetaData: 1\r\n\r\n", e ? e : "");
b = Bfdopen(f, OREAD);
aux = mallocz(sizeof(*aux), 1);
aux->outfd = outfd;
aux->newtitle = chancreate(sizeof(char*), 2);
for(r = -1;;){
if((s = Brdline(b, '\n')) == nil)
break;
if((n = Blinelen(b)) < 2)
break;
if(n == 2 && *s == '\r'){ /* eof */
r = 0;
break;
}
s[n-2] = 0;
if(strncmp(s, "icy-name:", 9) == 0){
s += 9;
if(newtitle != nil)
sendp(aux->newtitle, strdup(s));
else if(m->title == nil)
m->title = strdup(s);
}else if(newtitle == nil && strncmp(s, "icy-url:", 8) == 0 && m->numartist == 0){
s += 8;
m->artist[m->numartist++] = strdup(s);
}else if(strncmp(s, "icy-metaint:", 12) == 0){
s += 12;
aux->metaint = atoi(s);
}
}
if(r < 0 || outfd < 0){
Bterm(b);
b = nil;
free(aux);
}
if(b != nil){
assert(aux->newtitle != nil);
b->aux = aux;
*newtitle = aux->newtitle;
proccreate(icyproc, b, mainstacksize);
}
return r;
}
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