rt_size_t douban_radio_read(struct douban_radio* douban, char *buffer, rt_size_t length)
{
rt_size_t rx_length;
char* ptr;
if (douban->current >= douban->size)
{
douban_radio_playlist_load(douban);
printf("wrong\n");
return 0;
}
ptr = buffer;
while (length > 32) //why > 32?
{
if (douban->session == 0)
{
/* create a http session */
// rt_kprintf("open session url[%d]: %s\n", douban->current,
// douban->items[douban->current].url);
douban->session = http_session_open(douban->items[douban->current].url);
//printf("I am here\n");
if (douban->session == 0)
{
/* can't open this link */
douban->current ++;
// rt_kprintf("open session failed, move to %d\n", douban->current);
if (douban->current >= douban->size)
{
douban_radio_playlist_load(douban);
break;
}
}
}
/* read http client data */
rx_length = http_session_read(douban->session, ptr, length);
//printf("read data from the mp3 http_session\n");
if (rx_length <= 0)
{
/* close this session */
http_session_close(douban->session);
douban->session = 0;
douban->current ++;
// rt_kprintf("close session, move to %d\n", douban->current);
if (douban->current >= douban->size)
{
douban_radio_playlist_load(douban);
break;
}
}
else
{
ptr += rx_length;
length -= rx_length;
}
}
return ptr - buffer;
}
int douban_radio_playlist_load(struct douban_radio* douban)
{
rt_uint32_t index;
rt_size_t length;
char *buffer, *url;
char *ptr;
struct http_session* session;
for (index = 0; index < douban->size; index ++)
{
free(douban->items[index].artist);
free(douban->items[index].title);
free(douban->items[index].url);
free(douban->items[index].picture);
}
url = (char*)malloc(URL_SIZE);
snprintf(url, URL_SIZE,DOUBAN_RADIO_URL_CHANNEL, douban->channel);
//在linux下面没有sprintf_s这个，但是可以用snprintf替代，参数都不用改
session = http_session_open(url);
if (session == 0) goto __exit;
buffer =(char*)malloc(session->size);
ptr = buffer;
do
{
length = http_session_read(session, ptr, buffer + session->size - ptr);
if (length <= 0) break;
ptr += length;
} while (ptr < buffer + session->size);
length = ptr - buffer;
printf("total %d bytes\n", (int)length);
http_session_close(session); session = 0;
/* parse douban song list */
douban->current = douban->size = 0;
douban_radio_parse(douban, buffer, length);
return 0;
__exit:
//if (buffer != 0) free(buffer);
if (url != 0) free(url);
//if (session != 0) http_session_close(session);
return -1;
}
void http_test(char* url)
{
struct http_session* session;
char buffer[80];
rt_size_t length;
session = http_session_open(url);
if (session == RT_NULL)
{
rt_kprintf("open http session failed\n");
return;
}
do
{
rt_memset(buffer, 0, sizeof(buffer));
length = http_session_read(session, (rt_uint8_t*)buffer, sizeof(buffer));
rt_kprintf(buffer);rt_kprintf("\n");
} while (length > 0);
http_session_close(session);
}
