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_http_request_body_t *rb;
ngx_http_core_loc_conf_t *clcf;
r->main->count++;
if (r->request_body || r->discard_body) {
post_handler(r);
return NGX_OK;
}
if (ngx_http_test_expect(r) != NGX_OK) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
if (rb == NULL) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
r->request_body = rb;
if (r->headers_in.content_length_n < 0) {
post_handler(r);
return NGX_OK;
}
if (!r->request_buffering) {
return ngx_http_read_non_buffered_client_request_body(r, post_handler);
}
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) {
if (ngx_http_write_request_body(r, NULL) != NGX_OK) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
}
post_handler(r);
return NGX_OK;
}
rb->post_handler = post_handler;
/*
* set by ngx_pcalloc():
*
* rb->bufs = NULL;
* rb->buf = NULL;
* rb->rest = 0;
* rb->postpone_size = 0;
* rb->num = 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) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
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;
ngx_memzero(&buf, sizeof(ngx_buf_t));
buf.memory = 1;
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;
rb->bufs = ngx_alloc_chain_link(r->pool);
if (rb->bufs == NULL) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
rb->bufs->buf = b;
rb->bufs->next = NULL;
rb->buf = b;
rc = ngx_http_top_input_body_filter(r, &buf);
if (rc != NGX_OK) {
if (rc > NGX_OK && rc < NGX_HTTP_SPECIAL_RESPONSE) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"input filter: return code 1xx or 2xx "
"will cause trouble and is converted to 500");
}
/**
* NGX_OK: success and continue;
* NGX_ERROR: failed and exit;
* NGX_AGAIN: not ready and retry later.
*/
if (rc < NGX_HTTP_SPECIAL_RESPONSE && rc != NGX_AGAIN) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
}
return rc;
}
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) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
}
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;
rc = ngx_http_do_read_client_request_body(r);
goto done;
}
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) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
cl = ngx_alloc_chain_link(r->pool);
if (cl == NULL) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
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;
rc = ngx_http_do_read_client_request_body(r);
done:
if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
r->main->count--;
}
return rc;
}
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_int_t rc;
ngx_buf_t *b;
ngx_chain_t out, *cl;
ngx_http_request_body_t *rb;
ngx_http_core_loc_conf_t *clcf;
r->main->count++;
#if (NGX_HTTP_SPDY)
if (r->spdy_stream) {
rc = ngx_http_spdy_read_request_body(r, post_handler);
goto done;
}
#endif
if (r != r->main || r->request_body || r->discard_body) {
post_handler(r);
return NGX_OK;
}
if (ngx_http_test_expect(r) != NGX_OK) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
if (rb == NULL) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
/*
* set by ngx_pcalloc():
*
* rb->bufs = NULL;
* rb->buf = NULL;
* rb->free = NULL;
* rb->busy = NULL;
* rb->chunked = NULL;
* rb->rest = 0;
* rb->postpone_size = 0;
* rb->num = 0;
*/
rb->rest = -1;
rb->post_handler = post_handler;
r->request_body = rb;
if (r->headers_in.content_length_n < 0 && !r->headers_in.chunked) {
post_handler(r);
return NGX_OK;
}
if (!r->request_buffering) {
return ngx_http_read_non_buffered_client_request_body(r, post_handler);
}
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);
out.buf = r->header_in;
out.next = NULL;
rc = ngx_http_request_body_filter(r, &out);
if (rc != NGX_OK) {
goto done;
}
r->request_length += preread - (r->header_in->last - r->header_in->pos);
if (!r->headers_in.chunked
&& rb->rest > 0
&& rb->rest <= (off_t) (r->header_in->end - r->header_in->last))
{
/* the whole request body may be placed in r->header_in */
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
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;
rb->buf = b;
r->read_event_handler = ngx_http_read_client_request_body_handler;
r->write_event_handler = ngx_http_request_empty_handler;
rc = ngx_http_do_read_client_request_body(r);
goto done;
}
} else {
/* set rb->rest */
if (ngx_http_request_body_filter(r, NULL) != NGX_OK) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
}
if (rb->rest == 0) {
/* the whole request body was pre-read */
if (r->request_body_in_file_only) {
if (ngx_http_write_request_body(r) != NGX_OK) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
if (rb->temp_file->file.offset != 0) {
cl = ngx_chain_get_free_buf(r->pool, &rb->free);
if (cl == NULL) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
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;
}
}
post_handler(r);
return NGX_OK;
}
if (rb->rest < 0) {
ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
"negative request body rest");
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
size = clcf->client_body_buffer_size;
size += size >> 2;
/* TODO: honor r->request_body_in_single_buf */
if (!r->headers_in.chunked && rb->rest < size) {
size = (ssize_t) rb->rest;
if (r->request_body_in_single_buf) {
size += preread;
}
} else {
size = clcf->client_body_buffer_size;
}
rb->buf = ngx_create_temp_buf(r->pool, size);
if (rb->buf == NULL) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
r->read_event_handler = ngx_http_read_client_request_body_handler;
r->write_event_handler = ngx_http_request_empty_handler;
rc = ngx_http_do_read_client_request_body(r);
done:
if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
r->main->count--;
}
return rc;
}
