/* Asynchronous SSL stream reader */
int
ssl_read_thread(thread_t * thread)
{
SOCK *sock_obj = THREAD_ARG(thread);
int r = 0;
int error;
/* Handle read timeout */
if (thread->type == THREAD_READ_TIMEOUT)
return epilog(thread);
/*
* The design implemented here is a workaround for use
* with OpenSSL. This goto loop is a 'read until not
* end of stream'. But this break a little our global
* I/O multiplexer thread framework because it enter
* a synchronous read process for each GET reply.
* Sound a little nasty !.
*
* Why OpenSSL doesn t handle underlying fd. This
* break the I/O (select()) approach !...
* If you read this and know the answer, please reply
* I am probably missing something... :)
* My test show that sometime it return from select,
* and sometime not...
*/
read_stream:
/* read the SSL stream */
memset(sock_obj->buffer, 0, MAX_BUFFER_LENGTH);
r = SSL_read(sock_obj->ssl, sock_obj->buffer, MAX_BUFFER_LENGTH);
error = SSL_get_error(sock_obj->ssl, r);
DBG(" [l:%d,fd:%d]\n", r, sock_obj->fd);
if (error) {
/* All the SSL streal has been parsed */
/* Handle response stream */
if (error != SSL_ERROR_NONE)
return finalize(thread);
} else if (r > 0 && error == 0) {
/* Handle the response stream */
http_process_stream(sock_obj, r);
/*
* Register next ssl stream reader.
* Register itself to not perturbe global I/O multiplexer.
*/
goto read_stream;
}
return 0;
}
/* Asynchronous HTTP stream reader */
int
http_read_thread(thread_t * thread)
{
SOCK *sock_obj = THREAD_ARG(thread);
int r = 0;
/* Handle read timeout */
if (thread->type == THREAD_READ_TIMEOUT)
return epilog(thread);
/* read the HTTP stream */
r = MAX_BUFFER_LENGTH - sock_obj->size;
if (r <= 0) {
/* defensive check, should not occur */
fprintf(stderr, "HTTP socket buffer overflow (not consumed)\n");
r = MAX_BUFFER_LENGTH;
}
memset(sock_obj->buffer + sock_obj->size, 0, r);
r = read(thread->u.fd, sock_obj->buffer + sock_obj->size, r);
DBG(" [l:%d,fd:%d]\n", r, sock_obj->fd);
if (r == -1 || r == 0) { /* -1:error , 0:EOF */
if (r == -1) {
/* We have encourred a real read error */
DBG("Read error with server [%s]:%d: %s\n",
req->ipaddress, ntohs(req->addr_port),
strerror(errno));
return epilog(thread);
}
/* All the HTTP stream has been parsed */
finalize(thread);
} else {
/* Handle the response stream */
http_process_stream(sock_obj, r);
/*
* Register next http stream reader.
* Register itself to not perturbe global I/O multiplexer.
*/
thread_add_read(thread->master, http_read_thread, sock_obj,
thread->u.fd, HTTP_CNX_TIMEOUT);
}
return 0;
}
