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#include "uwsgi.h"
extern struct uwsgi_server uwsgi;
/*
Chunked input implementation
--chunked-input-limit <bytes> (default 1MB)
--chunked-input-timeout <s> (default --socket-timeout)
chunk = uwsgi.chunked_read([timeout])
timeout = -1 (wait forever)
timeout = 0 (default)
*/
static ssize_t uwsgi_chunked_input_recv(struct wsgi_request *wsgi_req, int timeout, int nb) {
if (timeout == 0) timeout = uwsgi.chunked_input_timeout;
if (timeout == 0) timeout = uwsgi.socket_timeout;
int ret = -1;
for(;;) {
ssize_t rlen = wsgi_req->socket->proto_read_body(wsgi_req, wsgi_req->chunked_input_buf->buf + wsgi_req->chunked_input_buf->pos, wsgi_req->chunked_input_buf->len - wsgi_req->chunked_input_buf->pos);
if (rlen > 0) return rlen;
if (rlen == 0) return -1;
if (rlen < 0) {
if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINPROGRESS) {
if (nb) return -1;
goto wait;
}
uwsgi_error("uwsgi_chunked_input_recv()");
return -1;
}
wait:
ret = uwsgi.wait_read_hook(wsgi_req->fd, timeout);
if (ret > 0) {
rlen = wsgi_req->socket->proto_read_body(wsgi_req, wsgi_req->chunked_input_buf->buf + wsgi_req->chunked_input_buf->pos, wsgi_req->chunked_input_buf->len - wsgi_req->chunked_input_buf->pos);
if (rlen > 0) return rlen;
if (rlen <= 0) return -1;
}
if (ret < 0) {
uwsgi_error("uwsgi_chunked_input_recv()");
}
return -1;
}
return -1;
}
static ssize_t uwsgi_chunked_readline(struct wsgi_request *wsgi_req) {
size_t i;
int found = 0;
for(i=0;i<wsgi_req->chunked_input_buf->pos;i++) {
if (found) {
if (wsgi_req->chunked_input_buf->buf[i] == '\n') {
// strtoul will stop at \r
size_t num = strtoul(wsgi_req->chunked_input_buf->buf, NULL, 16);
if (uwsgi_buffer_decapitate(wsgi_req->chunked_input_buf, i+1)) return -1;
return num;
}
return -1;
}
if ((wsgi_req->chunked_input_buf->buf[i] >= '0' && wsgi_req->chunked_input_buf->buf[i] <= '9') ||
(wsgi_req->chunked_input_buf->buf[i] >= 'a' && wsgi_req->chunked_input_buf->buf[i] <= 'z') ||
(wsgi_req->chunked_input_buf->buf[i] >= 'A' && wsgi_req->chunked_input_buf->buf[i] <= 'Z')) continue;
if (wsgi_req->chunked_input_buf->buf[i] == '\r') { found = 1; continue; }
return -1;
}
return -2;
}
/*
0 -> waiting for \r\n
1 -> waiting for whole body
*/
char *uwsgi_chunked_read(struct wsgi_request *wsgi_req, size_t *len, int timeout, int nb) {
if (!wsgi_req->chunked_input_buf) {
wsgi_req->chunked_input_buf = uwsgi_buffer_new(uwsgi.page_size);
wsgi_req->chunked_input_buf->limit = uwsgi.chunked_input_limit;
}
// the whole chunk stream has been consumed
if (wsgi_req->chunked_input_complete) {
*len = 0;
return wsgi_req->chunked_input_buf->buf;
}
if (wsgi_req->chunked_input_decapitate > 0) {
if (uwsgi_buffer_decapitate(wsgi_req->chunked_input_buf, wsgi_req->chunked_input_decapitate)) return NULL;
wsgi_req->chunked_input_decapitate = 0;
}
for(;;) {
if (wsgi_req->chunked_input_need > 0 || wsgi_req->chunked_input_buf->pos == 0) {
if (uwsgi_buffer_ensure(wsgi_req->chunked_input_buf, UMAX((uint64_t)uwsgi.page_size, wsgi_req->chunked_input_need))) return NULL;
ssize_t rlen = uwsgi_chunked_input_recv(wsgi_req, timeout, nb);
if (rlen <= 0) return NULL;
// update buffer position
wsgi_req->chunked_input_buf->pos += rlen;
if (wsgi_req->chunked_input_need > 0) {
if ((size_t)rlen > wsgi_req->chunked_input_need) {
wsgi_req->chunked_input_need = 0;
}
else {
wsgi_req->chunked_input_need -= rlen;
}
}
}
if (wsgi_req->chunked_input_need > 0) continue;
// ok we have a frame, let's parse it
if (wsgi_req->chunked_input_buf->pos > 0) {
switch(wsgi_req->chunked_input_parser_status) {
case 0:
wsgi_req->chunked_input_chunk_len = uwsgi_chunked_readline(wsgi_req);
if (wsgi_req->chunked_input_chunk_len == -2) {
wsgi_req->chunked_input_need++;
break;
}
else if (wsgi_req->chunked_input_chunk_len < 0) {
return NULL;
}
else if (wsgi_req->chunked_input_chunk_len == 0) {
*len = 0;
wsgi_req->chunked_input_complete = 1;
return wsgi_req->chunked_input_buf->buf;
}
// if here the buffer has been already decapitated
if ((size_t)(wsgi_req->chunked_input_chunk_len+2) > wsgi_req->chunked_input_buf->pos) {
wsgi_req->chunked_input_need = (wsgi_req->chunked_input_chunk_len+2) - wsgi_req->chunked_input_buf->pos;
wsgi_req->chunked_input_parser_status = 1;
break;
}
*len = wsgi_req->chunked_input_chunk_len;
wsgi_req->chunked_input_decapitate = wsgi_req->chunked_input_chunk_len+2;
return wsgi_req->chunked_input_buf->buf;
case 1:
if ((size_t)(wsgi_req->chunked_input_chunk_len+2) > wsgi_req->chunked_input_buf->pos) {
wsgi_req->chunked_input_need = (wsgi_req->chunked_input_chunk_len+2) - wsgi_req->chunked_input_buf->pos;
break;
}
*len = wsgi_req->chunked_input_chunk_len;
wsgi_req->chunked_input_decapitate = wsgi_req->chunked_input_chunk_len+2;
wsgi_req->chunked_input_parser_status = 0;
return wsgi_req->chunked_input_buf->buf;
}
}
}
}
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