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/*
* httpget.c
*
* Oliver Fromme <oliver.fromme@heim3.tu-clausthal.de>
* Wed Apr 9 20:57:47 MET DST 1997
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <netdb.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/errno.h>
extern int errno
;
#include "mpg123.h"
#ifndef INADDR_NONE
#define INADDR_NONE 0xffffffff
#endif
void writestring
(int fd
, char *string
)
{
int result
, bytes
= strlen(string
);
while (bytes
) {
if ((result
= write
(fd
, string
, bytes
)) < 0 && errno
!= EINTR
) {
perror ("write");
exit (1);
}
else if (result
== 0) {
fprintf (stderr
, "write: %s\n",
"socket closed unexpectedly");
exit (1);
}
string
+= result
;
bytes
-= result
;
}
}
void readstring
(char *string
, int maxlen
, FILE
*f
)
{
char *result
;
do {
result
= fgets(string
, maxlen
, f
);
} while (!result
&& errno
== EINTR
);
if (!result
) {
fprintf (stderr
, "Error reading from socket or unexpected EOF.\n");
exit (1);
}
}
char *url2hostport
(char *url
, char **hname
, unsigned long *hip
, unsigned int *port
)
{
char *cptr
;
struct hostent
*myhostent
;
struct in_addr myaddr
;
int isip
= 1;
if (!(strncmp(url
, "http://", 7)))
url
+= 7;
cptr
= url
;
while (*cptr
&& *cptr
!= ':' && *cptr
!= '/') {
if ((*cptr
< '0' || *cptr
> '9') && *cptr
!= '.')
isip
= 0;
cptr
++;
}
if (!(*hname
= strndup
(url
, cptr
- url
))) {
*hname
= NULL
;
return (NULL
);
}
if (!isip
) {
if (!(myhostent
= gethostbyname
(*hname
)))
return (NULL
);
memcpy (&myaddr
, myhostent
->h_addr
, sizeof(myaddr
));
*hip
= myaddr.
s_addr;
}
else
if ((*hip
= inet_addr
(*hname
)) == INADDR_NONE
)
return (NULL
);
if (!*cptr
|| *cptr
== '/') {
*port
= 80;
return (cptr
);
}
*port
= atoi(++cptr
);
while (*cptr
&& *cptr
!= '/')
cptr
++;
return (cptr
);
}
char *proxyurl
= NULL
;
unsigned long proxyip
= 0;
unsigned int proxyport
;
#define ACCEPT_HEAD "Accept: audio/mpeg, audio/x-mpegurl, */*\r\n"
FILE
*http_open
(char *url
)
{
char *purl
, *host
, *request
, *sptr
;
int linelength
;
unsigned long myip
;
unsigned int myport
;
int sock
;
int relocate
, numrelocs
= 0;
struct sockaddr_in server
;
FILE
*myfile
;
if (!proxyip
) {
if (!proxyurl
)
if (!(proxyurl
= getenv("MP3_HTTP_PROXY")))
if (!(proxyurl
= getenv("http_proxy")))
proxyurl
= getenv("HTTP_PROXY");
if (proxyurl
&& proxyurl
[0] && strcmp(proxyurl
, "none")) {
if (!(url2hostport
(proxyurl
, &host
, &proxyip
, &proxyport
))) {
fprintf (stderr
, "Unknown proxy host \"%s\".\n",
host
? host
: "");
exit (1);
}
if (host
)
free (host
);
}
else
proxyip
= INADDR_NONE
;
}
if ((linelength
= strlen(url
)+200) < 1024)
linelength
= 1024;
if (!(request
= malloc(linelength
)) || !(purl
= malloc(1024))) {
fprintf (stderr
, "malloc() failed, out of memory.\n");
exit (1);
}
strncpy (purl
, url
, 1023);
purl
[1023] = '\0';
do {
strcpy (request
, "GET ");
if (proxyip
!= INADDR_NONE
) {
if (strncmp(url
, "http://", 7))
strcat (request
, "http://");
strcat (request
, purl
);
myport
= proxyport
;
myip
= proxyip
;
}
else {
if (!(sptr
= url2hostport
(purl
, &host
, &myip
, &myport
))) {
fprintf (stderr
, "Unknown host \"%s\".\n",
host
? host
: "");
exit (1);
}
if (host
)
free (host
);
strcat (request
, sptr
);
}
sprintf (request
+ strlen(request
),
" HTTP/1.0\r\nUser-Agent: %s/%s\r\n",
prgName
, prgVersion
);
strcat (request
, ACCEPT_HEAD
);
strcat (request
, "\r\n");
server.
sin_family = AF_INET
;
server.
sin_port = htons
(myport
);
server.
sin_addr.
s_addr = myip
;
if ((sock
= socket
(PF_INET
, SOCK_STREAM
, 6)) < 0) {
perror ("socket");
exit (1);
}
if (connect
(sock
, (struct sockaddr
*)&server
, sizeof(server
))) {
perror ("connect");
exit (1);
}
writestring
(sock
, request
);
if (!(myfile
= fdopen(sock
, "rb"))) {
perror ("fdopen");
exit (1);
};
relocate
= FALSE
;
purl
[0] = '\0';
readstring
(request
, linelength
-1, myfile
);
if ((sptr
= strchr(request
, ' '))) {
switch (sptr
[1]) {
case '3':
relocate
= TRUE
;
case '2':
break;
default:
fprintf (stderr
, "HTTP request failed: %s",
sptr
+1); /* '\n' is included */
exit (1);
}
}
do {
readstring
(request
, linelength
-1, myfile
);
if (!strncmp(request
, "Location:", 9))
strncpy (purl
, request
+10, 1023);
} while (request
[0] != '\r' && request
[0] != '\n');
} while (relocate
&& purl
[0] && numrelocs
++ < 5);
if (relocate
) {
fprintf (stderr
, "Too many HTTP relocations.\n");
exit (1);
}
free (purl
);
free (request
);
return (myfile
);
}
/* EOF */