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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#include <ngx_http.h>
static void ngx_http_read_client_request_body_handler(ngx_event_t *rev);
static ngx_int_t ngx_http_do_read_client_request_body(ngx_http_request_t *r);
ngx_int_t ngx_http_read_client_request_body(ngx_http_request_t *r)
{
ssize_t size;
ngx_buf_t *b;
ngx_chain_t *cl;
ngx_http_core_loc_conf_t *clcf;
size = r->header_in->last - r->header_in->pos;
if (size) {
/* there is the pre-read part of the request body */
ngx_test_null(b, ngx_calloc_buf(r->pool),
NGX_HTTP_INTERNAL_SERVER_ERROR);
b->temporary = 1;
b->start = b->pos = r->header_in->pos;
b->end = b->last = r->header_in->last;
ngx_alloc_link_and_set_buf(r->request_body->bufs, b, r->pool,
NGX_HTTP_INTERNAL_SERVER_ERROR);
if (size >= r->headers_in.content_length_n) {
/* the whole request body was pre-read */
r->header_in->pos += r->headers_in.content_length_n;
r->request_body->handler(r->request_body->data);
return NGX_OK;
}
r->header_in->pos = r->header_in->last;
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
r->request_body->rest = r->headers_in.content_length_n - size;
if (r->request_body->rest
< clcf->client_body_buffer_size
+ (clcf->client_body_buffer_size >> 2))
{
size = r->request_body->rest;
} else {
size = clcf->client_body_buffer_size;
}
ngx_test_null(r->request_body->buf, ngx_create_temp_buf(r->pool, size),
NGX_HTTP_INTERNAL_SERVER_ERROR);
ngx_alloc_link_and_set_buf(cl, r->request_body->buf, r->pool,
NGX_HTTP_INTERNAL_SERVER_ERROR);
if (r->request_body->bufs) {
r->request_body->bufs->next = cl;
} else {
r->request_body->bufs = cl;
}
r->connection->read->event_handler =
ngx_http_read_client_request_body_handler;
return ngx_http_do_read_client_request_body(r);
}
static void ngx_http_read_client_request_body_handler(ngx_event_t *rev)
{
ngx_int_t rc;
ngx_connection_t *c;
ngx_http_request_t *r;
c = rev->data;
r = c->data;
if (rev->timedout) {
ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT);
return;
}
rc = ngx_http_do_read_client_request_body(r);
if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
ngx_http_finalize_request(r, rc);
}
}
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;
ngx_connection_t *c;
ngx_http_core_loc_conf_t *clcf;
c = r->connection;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http read client request body");
for ( ;; ) {
if (r->request_body->buf->last == r->request_body->buf->end) {
n = ngx_write_chain_to_temp_file(r->request_body->temp_file,
r->request_body->bufs->next ? r->request_body->bufs->next:
r->request_body->bufs);
/* TODO: n == 0 or not complete and level event */
if (n == NGX_ERROR) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->request_body->temp_file->offset += n;
r->request_body->buf->pos = r->request_body->buf->start;
r->request_body->buf->last = r->request_body->buf->start;
}
size = r->request_body->buf->end - r->request_body->buf->last;
if (size > r->request_body->rest) {
size = r->request_body->rest;
}
n = c->recv(c, r->request_body->buf->last, size);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http client request body recv %z", n);
if (n == NGX_AGAIN) {
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_ERROR) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
return NGX_AGAIN;
}
if (n == 0) {
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"client closed prematurely connection");
}
if (n == 0 || n == NGX_ERROR) {
r->closed = 1;
return NGX_HTTP_BAD_REQUEST;
}
r->request_body->buf->last += n;
r->request_body->rest -= n;
if (r->request_body->rest == 0) {
break;
}
if (r->request_body->buf->last < r->request_body->buf->end) {
break;
}
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http client request body rest %uz",
r->request_body->rest);
if (r->request_body->rest) {
return NGX_AGAIN;
}
if (r->request_body->temp_file->file.fd != NGX_INVALID_FILE) {
/* save the last part */
n = ngx_write_chain_to_temp_file(r->request_body->temp_file,
r->request_body->bufs->next ? r->request_body->bufs->next:
r->request_body->bufs);
/* TODO: n == 0 or not complete and level event */
if (n == NGX_ERROR) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (!(b = ngx_calloc_buf(r->pool))) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->in_file = 1;
b->file_pos = 0;
b->file_last = r->request_body->temp_file->file.offset;
b->file = &r->request_body->temp_file->file;
if (r->request_body->bufs->next) {
r->request_body->bufs->next->buf = b;
} else {
r->request_body->bufs->buf = b;
}
}
r->request_body->handler(r->request_body->data);
return NGX_OK;
}
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