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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_connection_t *c);
/*
* on completion ngx_http_read_client_request_body() adds to
* r->request_body->bufs one or two bufs:
* *) one memory buf that was preread in r->header_in;
* *) one memory or file buf that contains the rest of the body
*/
ngx_int_t
ngx_http_read_client_request_body(ngx_http_request_t *r,
ngx_http_client_body_handler_pt post_handler)
{
ssize_t size;
ngx_buf_t *b;
ngx_chain_t *cl;
ngx_connection_t *c;
ngx_http_request_body_t *rb;
ngx_http_core_loc_conf_t *clcf;
rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
if (rb == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->request_body = rb;
/* STUB */
if (r->file.fd != NGX_INVALID_FILE) {
if (ngx_close_file(r->file.fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
ngx_close_file_n " \"%V\" failed", &r->file.name);
}
r->file.fd = NGX_INVALID_FILE;
}
/**/
if (r->headers_in.content_length_n <= 0) {
post_handler(r);
return NGX_OK;
}
rb->post_handler = post_handler;
/*
* set by ngx_pcalloc():
*
* rb->bufs = NULL;
* rb->buf = NULL;
* rb->rest = 0;
*/
size = r->header_in->last - r->header_in->pos;
if (size) {
/* there is the pre-read part of the request body */
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->temporary = 1;
b->start = b->pos = r->header_in->pos;
b->end = b->last = r->header_in->last;
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;
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_length += r->headers_in.content_length_n;
post_handler(r);
return NGX_OK;
}
r->header_in->pos = r->header_in->last;
r->request_length += size;
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
rb->rest = r->headers_in.content_length_n - size;
if (rb->rest < clcf->client_body_buffer_size
+ (clcf->client_body_buffer_size >> 2))
{
size = rb->rest;
} else {
size = clcf->client_body_buffer_size;
}
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 (rb->bufs) {
rb->bufs->next = cl;
} else {
rb->bufs = cl;
}
c = r->connection;
c->read->event_handler = ngx_http_read_client_request_body_handler;
return ngx_http_do_read_client_request_body(r, c);
}
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, c);
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,
ngx_connection_t *c)
{
size_t size;
ssize_t n;
ngx_buf_t *b;
ngx_temp_file_t *tf;
ngx_http_request_body_t *rb;
ngx_http_core_loc_conf_t *clcf;
rb = r->request_body;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http read client request body");
for ( ;; ) {
if (rb->buf->last == rb->buf->end) {
if (rb->temp_file == NULL) {
tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
if (tf == NULL) {
return NGX_ERROR;
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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";
rb->temp_file = tf;
}
n = ngx_write_chain_to_temp_file(rb->temp_file,
rb->bufs->next ? rb->bufs->next:
rb->bufs);
/* TODO: n == 0 or not complete and level event */
if (n == NGX_ERROR) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
rb->temp_file->offset += n;
rb->buf->pos = rb->buf->start;
rb->buf->last = rb->buf->start;
}
size = rb->buf->end - rb->buf->last;
if (size > rb->rest) {
size = 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) {
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;
}
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 %uz", rb->rest);
if (rb->rest) {
return NGX_AGAIN;
}
if (rb->temp_file) {
/* save the last part */
n = ngx_write_chain_to_temp_file(rb->temp_file,
rb->bufs->next ? rb->bufs->next:
rb->bufs);
/* TODO: n == 0 or not complete and level event */
if (n == NGX_ERROR) {
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;
}
}
rb->post_handler(r);
return NGX_OK;
}
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