static ngx_int_t
ngx_http_do_read_client_request_body(ngx_http_request_t *r)
{
size_t size;
ssize_t n;
ngx_buf_t *b, buf;
ngx_int_t rc;
ngx_connection_t *c;
ngx_http_request_body_t *rb;
ngx_http_core_loc_conf_t *clcf;
c = r->connection;
rb = r->request_body;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http read client request body");
for ( ;; ) {
for ( ;; ) {
if (rb->buf->last == rb->buf->end) {
if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
ngx_http_probe_read_body_abort(r, "write temp file failed");
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
rb->buf->last = rb->buf->start;
}
size = rb->buf->end - rb->buf->last;
if ((off_t) size > rb->rest) {
size = (size_t) rb->rest;
}
n = c->recv(c, rb->buf->last, size);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http client request body recv %z", n);
if (n == NGX_AGAIN) {
break;
}
if (n == 0) {
ngx_http_probe_read_body_abort(r, "connection closed");
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"client prematurely closed connection");
}
if (n == 0 || n == NGX_ERROR) {
c->error = 1;
return NGX_HTTP_BAD_REQUEST;
}
buf.start = rb->buf->last;
buf.pos = rb->buf->last;
buf.last = buf.start + n;
buf.end = buf.last;
rc = ngx_http_top_input_body_filter(r, &buf);
if (rc != NGX_OK) {
return rc;
}
rb->buf->last += n;
rb->rest -= n;
r->request_length += n;
if (rb->rest == 0) {
break;
}
if (rb->buf->last < rb->buf->end) {
break;
}
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http client request body rest %O", rb->rest);
if (rb->rest == 0) {
break;
}
if (!c->read->ready) {
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
ngx_add_timer(c->read, clcf->client_body_timeout);
if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
return NGX_AGAIN;
}
}
if (c->read->timer_set) {
ngx_del_timer(c->read);
}
if (rb->temp_file || r->request_body_in_file_only) {
/* save the last part */
if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
ngx_http_probe_read_body_abort(r, "write temp file failed");
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->in_file = 1;
b->file_pos = 0;
b->file_last = rb->temp_file->file.offset;
b->file = &rb->temp_file->file;
if (rb->bufs->next) {
rb->bufs->next->buf = b;
} else {
rb->bufs->buf = b;
}
}
if (rb->bufs->next
&& (r->request_body_in_file_only || r->request_body_in_single_buf))
{
rb->bufs = rb->bufs->next;
}
r->read_event_handler = ngx_http_block_reading;
ngx_http_probe_read_body_done(r);
rb->post_handler(r);
return NGX_OK;
}
static ngx_int_t
ngx_http_do_read_client_request_body(ngx_http_request_t *r)
{
off_t rest;
size_t size;
ssize_t n;
ngx_int_t rc;
ngx_buf_t *b;
ngx_chain_t *cl, out;
ngx_connection_t *c;
ngx_http_request_body_t *rb;
ngx_http_core_loc_conf_t *clcf;
c = r->connection;
rb = r->request_body;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http read client request body");
for ( ;; ) {
for ( ;; ) {
if (rb->buf->last == rb->buf->end) {
if (rb->buf->pos != rb->buf->last) {
/* pass buffer to request body filter chain */
out.buf = rb->buf;
out.next = NULL;
rc = ngx_http_request_body_filter(r, &out);
if (rc != NGX_OK) {
return rc;
}
} else {
/* update chains */
rc = ngx_http_request_body_filter(r, NULL);
if (rc != NGX_OK) {
return rc;
}
}
if (rb->busy != NULL) {
if (r->request_body_no_buffering) {
if (c->read->timer_set) {
ngx_del_timer(c->read);
}
if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
return NGX_AGAIN;
}
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
rb->buf->pos = rb->buf->start;
rb->buf->last = rb->buf->start;
}
size = rb->buf->end - rb->buf->last;
rest = rb->rest - (rb->buf->last - rb->buf->pos);
if ((off_t) size > rest) {
size = (size_t) rest;
}
n = c->recv(c, rb->buf->last, size);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http client request body recv %z", n);
if (n == NGX_AGAIN) {
break;
}
if (n == 0) {
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"client prematurely closed connection");
}
if (n == 0 || n == NGX_ERROR) {
c->error = 1;
return NGX_HTTP_BAD_REQUEST;
}
rb->buf->last += n;
r->request_length += n;
if (n == rest) {
/* pass buffer to request body filter chain */
out.buf = rb->buf;
out.next = NULL;
rc = ngx_http_request_body_filter(r, &out);
if (rc != NGX_OK) {
return rc;
}
}
if (rb->rest == 0) {
break;
}
if (rb->buf->last < rb->buf->end) {
break;
}
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http client request body rest %O", rb->rest);
if (rb->rest == 0) {
break;
}
if (!c->read->ready) {
if (r->request_body_no_buffering
&& rb->buf->pos != rb->buf->last)
{
/* pass buffer to request body filter chain */
out.buf = rb->buf;
out.next = NULL;
rc = ngx_http_request_body_filter(r, &out);
if (rc != NGX_OK) {
return rc;
}
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
ngx_add_timer(c->read, clcf->client_body_timeout);
if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
return NGX_AGAIN;
}
}
if (c->read->timer_set) {
ngx_del_timer(c->read);
}
if (rb->temp_file || r->request_body_in_file_only) {
/* save the last part */
if (ngx_http_write_request_body(r) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (rb->temp_file->file.offset != 0) {
cl = ngx_chain_get_free_buf(r->pool, &rb->free);
if (cl == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b = cl->buf;
ngx_memzero(b, sizeof(ngx_buf_t));
b->in_file = 1;
b->file_last = rb->temp_file->file.offset;
b->file = &rb->temp_file->file;
rb->bufs = cl;
} else {
rb->bufs = NULL;
}
}
if (!r->request_body_no_buffering) {
r->read_event_handler = ngx_http_block_reading;
rb->post_handler(r);
}
ngx_http_probe_read_body_done(r);
return NGX_OK;
}
ngx_int_t
ngx_http_read_client_request_body(ngx_http_request_t *r,
ngx_http_client_body_handler_pt post_handler)
{
size_t preread;
ssize_t size;
ngx_buf_t *b, buf;
ngx_int_t rc;
ngx_chain_t *cl, **next;
ngx_temp_file_t *tf;
ngx_http_request_body_t *rb;
ngx_http_core_loc_conf_t *clcf;
r->main->count++;
if (r->request_body || r->discard_body) {
ngx_http_probe_read_body_abort(r,
(r->request_body ? "body exists"
: "body discarded"));
post_handler(r);
return NGX_OK;
}
if (ngx_http_test_expect(r) != NGX_OK) {
ngx_http_probe_read_body_abort(r, "test expect failed");
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
if (rb == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->request_body = rb;
if (r->headers_in.content_length_n < 0) {
ngx_http_probe_read_body_abort(r, "no content length");
post_handler(r);
return NGX_OK;
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (r->headers_in.content_length_n == 0) {
if (r->request_body_in_file_only) {
tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
if (tf == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
tf->file.fd = NGX_INVALID_FILE;
tf->file.log = r->connection->log;
tf->path = clcf->client_body_temp_path;
tf->pool = r->pool;
tf->warn = "a client request body is buffered to a temporary file";
tf->log_level = r->request_body_file_log_level;
tf->persistent = r->request_body_in_persistent_file;
tf->clean = r->request_body_in_clean_file;
if (r->request_body_file_group_access) {
tf->access = 0660;
}
rb->temp_file = tf;
if (ngx_create_temp_file(&tf->file, tf->path, tf->pool,
tf->persistent, tf->clean, tf->access)
!= NGX_OK)
{
ngx_http_probe_read_body_abort(r, "create temp file failed");
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
}
ngx_http_probe_read_body_done(r);
post_handler(r);
return NGX_OK;
}
rb->post_handler = post_handler;
/*
* set by ngx_pcalloc():
*
* rb->bufs = NULL;
* rb->buf = NULL;
* rb->rest = 0;
*/
preread = r->header_in->last - r->header_in->pos;
if (preread) {
/* there is the pre-read part of the request body */
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http client request body preread %uz", preread);
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->temporary = 1;
b->start = r->header_in->pos;
b->pos = r->header_in->pos;
b->last = r->header_in->last;
b->end = r->header_in->end;
buf.start = r->header_in->pos;
buf.pos = r->header_in->pos;
buf.last = (off_t) preread >= r->headers_in.content_length_n
? r->header_in->pos + (size_t) r->headers_in.content_length_n
: r->header_in->last;
buf.end = r->header_in->end;
rc = ngx_http_top_input_body_filter(r, &buf);
if (rc != NGX_OK) {
return rc;
}
rb->bufs = ngx_alloc_chain_link(r->pool);
if (rb->bufs == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
rb->bufs->buf = b;
rb->bufs->next = NULL;
rb->buf = b;
if ((off_t) preread >= r->headers_in.content_length_n) {
/* the whole request body was pre-read */
r->header_in->pos += (size_t) r->headers_in.content_length_n;
r->request_length += r->headers_in.content_length_n;
b->last = r->header_in->pos;
if (r->request_body_in_file_only) {
if (ngx_http_write_request_body(r, rb->bufs) != NGX_OK) {
ngx_http_probe_read_body_abort(r, "write temp file failed");
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
}
ngx_http_probe_read_body_done(r);
post_handler(r);
return NGX_OK;
}
/*
* to not consider the body as pipelined request in
* ngx_http_set_keepalive()
*/
r->header_in->pos = r->header_in->last;
r->request_length += preread;
rb->rest = r->headers_in.content_length_n - preread;
if (rb->rest <= (off_t) (b->end - b->last)) {
/* the whole request body may be placed in r->header_in */
rb->to_write = rb->bufs;
r->read_event_handler = ngx_http_read_client_request_body_handler;
return ngx_http_do_read_client_request_body(r);
}
next = &rb->bufs->next;
} else {
b = NULL;
rb->rest = r->headers_in.content_length_n;
next = &rb->bufs;
}
size = clcf->client_body_buffer_size;
size += size >> 2;
if (rb->rest < size) {
size = (ssize_t) rb->rest;
if (r->request_body_in_single_buf) {
size += preread;
}
} else {
size = clcf->client_body_buffer_size;
/* disable copying buffer for r->request_body_in_single_buf */
b = NULL;
}
rb->buf = ngx_create_temp_buf(r->pool, size);
if (rb->buf == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
cl = ngx_alloc_chain_link(r->pool);
if (cl == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
cl->buf = rb->buf;
cl->next = NULL;
if (b && r->request_body_in_single_buf) {
size = b->last - b->pos;
ngx_memcpy(rb->buf->pos, b->pos, size);
rb->buf->last += size;
next = &rb->bufs;
}
*next = cl;
if (r->request_body_in_file_only || r->request_body_in_single_buf) {
rb->to_write = rb->bufs;
} else {
rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
}
r->read_event_handler = ngx_http_read_client_request_body_handler;
return ngx_http_do_read_client_request_body(r);
}
