static size_t readstring (mpg123_string *string, size_t maxlen, int fd)
{
int err;
debug2("Attempting readstring on %d for %"SIZE_P" bytes", fd, (size_p)maxlen);
string->fill = 0;
while(maxlen == 0 || string->fill < maxlen)
{
if(string->size-string->fill < 1)
if(!mpg123_grow_string(string, string->fill+4096))
{
error("Cannot allocate memory for reading.");
string->fill = 0;
return 0;
}
err = read(fd,string->p+string->fill,1);
/* Whoa... reading one byte at a time... one could ensure the line break in another way, but more work. */
if( err == 1)
{
string->fill++;
if(string->p[string->fill-1] == '\n') break;
}
else if(errno != EINTR)
{
error("Error reading from socket or unexpected EOF.");
string->fill = 0;
/* bail out to prevent endless loop */
return 0;
}
}
if(!mpg123_grow_string(string, string->fill+1))
{
string->fill=0;
}
else
{
string->p[string->fill] = 0;
string->fill++;
}
return string->fill;
}
size_t readstring (mpg123_string *string, size_t maxlen, FILE *f)
{
string->fill = 0;
while(maxlen == 0 || string->fill < maxlen)
{
if(string->size-string->fill < 1)
if(!mpg123_grow_string(string, string->fill+4096))
{
error("Cannot allocate memory for reading.");
string->fill = 0;
return 0;
}
/* Whoa... reading one byte at a time... one could ensure the line break in another way, but more work. */
if( read(fileno(f),string->p+string->fill,1) == 1)
{
string->fill++;
if(string->p[string->fill-1] == '\n') break;
}
else if(errno != EINTR)
{
error("Error reading from socket or unexpected EOF.");
string->fill = 0;
/* bail out to prevent endless loop */
return 0;
}
}
if(!mpg123_grow_string(string, string->fill+1))
{
string->fill=0;
}
else
{
string->p[string->fill] = 0;
string->fill++;
}
return string->fill;
}
int win32_net_http_open(char* url, struct httpdata *hd)
{
mpg123_string purl, host, port, path;
mpg123_string request, response, request_url;
mpg123_string httpauth1;
ws.local_socket = SOCKET_ERROR;
int oom = 0;
int relocate, numrelocs = 0;
int got_location = FALSE;
/*
workaround for http://www.global24music.com/rautemusik/files/extreme/isdn.pls
this site's apache gives me a relocation to the same place when I give the port in Host request field
for the record: Apache/2.0.51 (Fedora)
*/
int try_without_port = 0;
mpg123_init_string(&purl);
mpg123_init_string(&host);
mpg123_init_string(&port);
mpg123_init_string(&path);
mpg123_init_string(&request);
mpg123_init_string(&response);
mpg123_init_string(&request_url);
mpg123_init_string(&httpauth1);
/* Get initial info for proxy server. Once. */
if(hd->proxystate == PROXY_UNKNOWN && !proxy_init(hd)) goto exit;
if(!translate_url(url, &purl)){ oom=1; goto exit; }
/* Don't confuse the different auth strings... */
if(!split_url(&purl, &httpauth1, NULL, NULL, NULL) ){ oom=1; goto exit; }
/* "GET http://" 11
* " HTTP/1.0\r\nUser-Agent: <PACKAGE_NAME>/<PACKAGE_VERSION>\r\n"
* 26 + PACKAGE_NAME + PACKAGE_VERSION
* accept header + accept_length()
* "Authorization: Basic \r\n" 23
* "\r\n" 2
* ... plus the other predefined header lines
*/
/* Just use this estimate as first guess to reduce malloc calls in string library. */
{
size_t length_estimate = 62 + strlen(PACKAGE_NAME) + strlen(PACKAGE_VERSION)
+ accept_length() + strlen(CONN_HEAD) + strlen(icy_yes) + purl.fill;
if( !mpg123_grow_string(&request, length_estimate)
|| !mpg123_grow_string(&response,4096) )
{
oom=1; goto exit;
}
}
do
{
/* Storing the request url, with http:// prepended if needed. */
/* used to be url here... seemed wrong to me (when loop advanced...) */
if(strncasecmp(purl.p, "http://", 7) != 0) mpg123_set_string(&request_url, "http://");
else mpg123_set_string(&request_url, "");
mpg123_add_string(&request_url, purl.p);
if (hd->proxystate >= PROXY_HOST)
{
/* We will connect to proxy, full URL goes into the request. */
if( !mpg123_copy_string(&hd->proxyhost, &host)
|| !mpg123_copy_string(&hd->proxyport, &port)
|| !mpg123_set_string(&request, "GET ")
|| !mpg123_add_string(&request, request_url.p) )
{
oom=1; goto exit;
}
}
else
{
/* We will connect to the host from the URL and only the path goes into the request. */
if(!split_url(&purl, NULL, &host, &port, &path)){ oom=1; goto exit; }
if( !mpg123_set_string(&request, "GET ")
|| !mpg123_add_string(&request, path.p) )
{
oom=1; goto exit;
}
}
if(!fill_request(&request, &host, &port, &httpauth1, &try_without_port)){ oom=1; goto exit; }
httpauth1.fill = 0; /* We use the auth data from the URL only once. */
debug2("attempting to open_connection to %s:%s", host.p, port.p);
win32_net_open_connection(&host, &port);
if(ws.local_socket == SOCKET_ERROR)
{
error1("Unable to establish connection to %s", host.fill ? host.p : "");
goto exit;
}
debug("win32_net_open_connection succeed");
#define http_failure win32_net_close(ws.local_socket); ws.local_socket=SOCKET_ERROR; goto exit;
if(param.verbose > 2) fprintf(stderr, "HTTP request:\n%s\n",request.p);
if(!win32_net_writestring(ws.local_socket, &request)){ http_failure; }
debug("Skipping fdopen for WSA sockets");
relocate = FALSE;
/* Arbitrary length limit here... */
#define safe_readstring \
win32_net_readstring(&response, SIZE_MAX/16, NULL); \
if(response.fill > SIZE_MAX/16) /* > because of appended zero. */ \
{ \
error("HTTP response line exceeds max. length"); \
http_failure; \
} \
else if(response.fill == 0) \
{ \
error("readstring failed"); \
http_failure; \
} \
if(param.verbose > 2) fprintf(stderr, "HTTP in: %s", response.p);
safe_readstring;
{
char *sptr;
if((sptr = strchr(response.p, ' ')))
{
if(response.fill > sptr-response.p+2)
switch (sptr[1])
{
case '3':
relocate = TRUE;
case '2':
break;
default:
fprintf (stderr, "HTTP request failed: %s", sptr+1); /* '\n' is included */
http_failure;
}
else{ error("Too short response,"); http_failure; }
}
}
/* If we are relocated, we need to look out for a Location header. */
got_location = FALSE;
do
{
safe_readstring; /* Think about that: Should we really error out when we get nothing? Could be that the server forgot the trailing empty line... */
if (!strncasecmp(response.p, "Location: ", 10))
{ /* It is a redirection! */
if(!win32_net_resolve_redirect(&response, &request_url, &purl)){ oom=1, http_failure; }
if(!strcmp(purl.p, request_url.p))
{
warning("relocated to very same place! trying request again without host port");
try_without_port = 1;
}
got_location = TRUE;
}
else
{ /* We got a header line (or the closing empty line). */
char *tmp;
debug1("searching for header values... %s", response.p);
/* Not sure if I want to bail out on error here. */
/* Also: What text encoding are these strings in? Doesn't need to be plain ASCII... */
get_header_string(&response, "content-type", &hd->content_type);
get_header_string(&response, "icy-name", &hd->icy_name);
get_header_string(&response, "icy-url", &hd->icy_url);
/* watch out for icy-metaint */
if((tmp = get_header_val("icy-metaint", &response)))
{
hd->icy_interval = (off_t) atol(tmp); /* atoll ? */
debug1("got icy-metaint %li", (long int)hd->icy_interval);
}
}
} while(response.p[0] != '\r' && response.p[0] != '\n');
} while(relocate && got_location && purl.fill && numrelocs++ < HTTP_MAX_RELOCATIONS);
if(relocate)
{
if(!got_location)
error("Server meant to redirect but failed to provide a location!");
else
error1("Too many HTTP relocations (%i).", numrelocs);
http_failure;
}
exit: /* The end as well as the exception handling point... */
if(oom) error("Apparently, I ran out of memory or had some bad input data...");
mpg123_free_string(&purl);
mpg123_free_string(&host);
mpg123_free_string(&port);
mpg123_free_string(&path);
mpg123_free_string(&request);
mpg123_free_string(&response);
mpg123_free_string(&request_url);
mpg123_free_string(&httpauth1);
if (ws.local_socket == SOCKET_ERROR || oom)
return -1;
else
return 1;
}
