diff options
Diffstat (limited to 'app/nginx/src/http/ngx_http_request_body.c')
| -rw-r--r-- | app/nginx/src/http/ngx_http_request_body.c | 1165 |
1 files changed, 1165 insertions, 0 deletions
diff --git a/app/nginx/src/http/ngx_http_request_body.c b/app/nginx/src/http/ngx_http_request_body.c new file mode 100644 index 0000000..2f66484 --- /dev/null +++ b/app/nginx/src/http/ngx_http_request_body.c @@ -0,0 +1,1165 @@ + +/* + * Copyright (C) Igor Sysoev + * Copyright (C) Nginx, Inc. + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_http.h> + + +static void ngx_http_read_client_request_body_handler(ngx_http_request_t *r); +static ngx_int_t ngx_http_do_read_client_request_body(ngx_http_request_t *r); +static ngx_int_t ngx_http_write_request_body(ngx_http_request_t *r); +static ngx_int_t ngx_http_read_discarded_request_body(ngx_http_request_t *r); +static ngx_int_t ngx_http_discard_request_body_filter(ngx_http_request_t *r, + ngx_buf_t *b); +static ngx_int_t ngx_http_test_expect(ngx_http_request_t *r); + +static ngx_int_t ngx_http_request_body_filter(ngx_http_request_t *r, + ngx_chain_t *in); +static ngx_int_t ngx_http_request_body_length_filter(ngx_http_request_t *r, + ngx_chain_t *in); +static ngx_int_t ngx_http_request_body_chunked_filter(ngx_http_request_t *r, + ngx_chain_t *in); + + +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; + ngx_http_request_body_t *rb; + ngx_http_core_loc_conf_t *clcf; + + r->main->count++; + + if (r != r->main || r->request_body || r->discard_body) { + r->request_body_no_buffering = 0; + post_handler(r); + return NGX_OK; + } + +#if (NGX_HTTP_V2) + if (r->stream) { + rc = ngx_http_v2_read_request_body(r, post_handler); + goto done; + } +#endif + + 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 = -1; + rb->post_handler = post_handler; + + r->request_body = rb; + + if (r->headers_in.content_length_n < 0 && !r->headers_in.chunked) { + r->request_body_no_buffering = 0; + post_handler(r); + return NGX_OK; + } + + 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 */ + r->request_body_no_buffering = 0; + 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 (r->request_body_no_buffering + && (rc == NGX_OK || rc == NGX_AGAIN)) + { + if (rc == NGX_OK) { + r->request_body_no_buffering = 0; + + } else { + /* rc == NGX_AGAIN */ + r->reading_body = 1; + } + + r->read_event_handler = ngx_http_block_reading; + post_handler(r); + } + + if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { + r->main->count--; + } + + return rc; +} + + +ngx_int_t +ngx_http_read_unbuffered_request_body(ngx_http_request_t *r) +{ + ngx_int_t rc; + +#if (NGX_HTTP_V2) + if (r->stream) { + rc = ngx_http_v2_read_unbuffered_request_body(r); + + if (rc == NGX_OK) { + r->reading_body = 0; + } + + return rc; + } +#endif + + if (r->connection->read->timedout) { + r->connection->timedout = 1; + return NGX_HTTP_REQUEST_TIME_OUT; + } + + rc = ngx_http_do_read_client_request_body(r); + + if (rc == NGX_OK) { + r->reading_body = 0; + } + + return rc; +} + + +static void +ngx_http_read_client_request_body_handler(ngx_http_request_t *r) +{ + ngx_int_t rc; + + if (r->connection->read->timedout) { + r->connection->timedout = 1; + 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) +{ + off_t rest; + size_t size; + ssize_t n; + ngx_int_t rc; + ngx_chain_t 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 (!r->request_body_no_buffering) { + r->read_event_handler = ngx_http_block_reading; + rb->post_handler(r); + } + + return NGX_OK; +} + + +static ngx_int_t +ngx_http_write_request_body(ngx_http_request_t *r) +{ + ssize_t n; + ngx_chain_t *cl, *ln; + ngx_temp_file_t *tf; + ngx_http_request_body_t *rb; + ngx_http_core_loc_conf_t *clcf; + + rb = r->request_body; + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http write client request body, bufs %p", rb->bufs); + + 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"; + 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 (rb->bufs == NULL) { + /* empty body with r->request_body_in_file_only */ + + if (ngx_create_temp_file(&tf->file, tf->path, tf->pool, + tf->persistent, tf->clean, tf->access) + != NGX_OK) + { + return NGX_ERROR; + } + + return NGX_OK; + } + } + + if (rb->bufs == NULL) { + return NGX_OK; + } + + n = ngx_write_chain_to_temp_file(rb->temp_file, rb->bufs); + + /* TODO: n == 0 or not complete and level event */ + + if (n == NGX_ERROR) { + return NGX_ERROR; + } + + rb->temp_file->offset += n; + + /* mark all buffers as written */ + + for (cl = rb->bufs; cl; /* void */) { + + cl->buf->pos = cl->buf->last; + + ln = cl; + cl = cl->next; + ngx_free_chain(r->pool, ln); + } + + rb->bufs = NULL; + + return NGX_OK; +} + + +ngx_int_t +ngx_http_discard_request_body(ngx_http_request_t *r) +{ + ssize_t size; + ngx_int_t rc; + ngx_event_t *rev; + + if (r != r->main || r->discard_body || r->request_body) { + return NGX_OK; + } + +#if (NGX_HTTP_V2) + if (r->stream) { + r->stream->skip_data = 1; + return NGX_OK; + } +#endif + + if (ngx_http_test_expect(r) != NGX_OK) { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } + + rev = r->connection->read; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body"); + + if (rev->timer_set) { + ngx_del_timer(rev); + } + + if (r->headers_in.content_length_n <= 0 && !r->headers_in.chunked) { + return NGX_OK; + } + + size = r->header_in->last - r->header_in->pos; + + if (size || r->headers_in.chunked) { + rc = ngx_http_discard_request_body_filter(r, r->header_in); + + if (rc != NGX_OK) { + return rc; + } + + if (r->headers_in.content_length_n == 0) { + return NGX_OK; + } + } + + rc = ngx_http_read_discarded_request_body(r); + + if (rc == NGX_OK) { + r->lingering_close = 0; + return NGX_OK; + } + + if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { + return rc; + } + + /* rc == NGX_AGAIN */ + + r->read_event_handler = ngx_http_discarded_request_body_handler; + + if (ngx_handle_read_event(rev, 0) != NGX_OK) { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } + + r->count++; + r->discard_body = 1; + + return NGX_OK; +} + + +void +ngx_http_discarded_request_body_handler(ngx_http_request_t *r) +{ + ngx_int_t rc; + ngx_msec_t timer; + ngx_event_t *rev; + ngx_connection_t *c; + ngx_http_core_loc_conf_t *clcf; + + c = r->connection; + rev = c->read; + + if (rev->timedout) { + c->timedout = 1; + c->error = 1; + ngx_http_finalize_request(r, NGX_ERROR); + return; + } + + if (r->lingering_time) { + timer = (ngx_msec_t) r->lingering_time - (ngx_msec_t) ngx_time(); + + if ((ngx_msec_int_t) timer <= 0) { + r->discard_body = 0; + r->lingering_close = 0; + ngx_http_finalize_request(r, NGX_ERROR); + return; + } + + } else { + timer = 0; + } + + rc = ngx_http_read_discarded_request_body(r); + + if (rc == NGX_OK) { + r->discard_body = 0; + r->lingering_close = 0; + ngx_http_finalize_request(r, NGX_DONE); + return; + } + + if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { + c->error = 1; + ngx_http_finalize_request(r, NGX_ERROR); + return; + } + + /* rc == NGX_AGAIN */ + + if (ngx_handle_read_event(rev, 0) != NGX_OK) { + c->error = 1; + ngx_http_finalize_request(r, NGX_ERROR); + return; + } + + if (timer) { + + clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); + + timer *= 1000; + + if (timer > clcf->lingering_timeout) { + timer = clcf->lingering_timeout; + } + + ngx_add_timer(rev, timer); + } +} + + +static ngx_int_t +ngx_http_read_discarded_request_body(ngx_http_request_t *r) +{ + size_t size; + ssize_t n; + ngx_int_t rc; + ngx_buf_t b; + u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE]; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http read discarded body"); + + ngx_memzero(&b, sizeof(ngx_buf_t)); + + b.temporary = 1; + + for ( ;; ) { + if (r->headers_in.content_length_n == 0) { + r->read_event_handler = ngx_http_block_reading; + return NGX_OK; + } + + if (!r->connection->read->ready) { + return NGX_AGAIN; + } + + size = (size_t) ngx_min(r->headers_in.content_length_n, + NGX_HTTP_DISCARD_BUFFER_SIZE); + + n = r->connection->recv(r->connection, buffer, size); + + if (n == NGX_ERROR) { + r->connection->error = 1; + return NGX_OK; + } + + if (n == NGX_AGAIN) { + return NGX_AGAIN; + } + + if (n == 0) { + return NGX_OK; + } + + b.pos = buffer; + b.last = buffer + n; + + rc = ngx_http_discard_request_body_filter(r, &b); + + if (rc != NGX_OK) { + return rc; + } + } +} + + +static ngx_int_t +ngx_http_discard_request_body_filter(ngx_http_request_t *r, ngx_buf_t *b) +{ + size_t size; + ngx_int_t rc; + ngx_http_request_body_t *rb; + + if (r->headers_in.chunked) { + + rb = r->request_body; + + if (rb == NULL) { + + rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t)); + if (rb == NULL) { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } + + rb->chunked = ngx_pcalloc(r->pool, sizeof(ngx_http_chunked_t)); + if (rb->chunked == NULL) { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } + + r->request_body = rb; + } + + for ( ;; ) { + + rc = ngx_http_parse_chunked(r, b, rb->chunked); + + if (rc == NGX_OK) { + + /* a chunk has been parsed successfully */ + + size = b->last - b->pos; + + if ((off_t) size > rb->chunked->size) { + b->pos += (size_t) rb->chunked->size; + rb->chunked->size = 0; + + } else { + rb->chunked->size -= size; + b->pos = b->last; + } + + continue; + } + + if (rc == NGX_DONE) { + + /* a whole response has been parsed successfully */ + + r->headers_in.content_length_n = 0; + break; + } + + if (rc == NGX_AGAIN) { + + /* set amount of data we want to see next time */ + + r->headers_in.content_length_n = rb->chunked->length; + break; + } + + /* invalid */ + + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "client sent invalid chunked body"); + + return NGX_HTTP_BAD_REQUEST; + } + + } else { + size = b->last - b->pos; + + if ((off_t) size > r->headers_in.content_length_n) { + b->pos += (size_t) r->headers_in.content_length_n; + r->headers_in.content_length_n = 0; + + } else { + b->pos = b->last; + r->headers_in.content_length_n -= size; + } + } + + return NGX_OK; +} + + +static ngx_int_t +ngx_http_test_expect(ngx_http_request_t *r) +{ + ngx_int_t n; + ngx_str_t *expect; + + if (r->expect_tested + || r->headers_in.expect == NULL + || r->http_version < NGX_HTTP_VERSION_11) + { + return NGX_OK; + } + + r->expect_tested = 1; + + expect = &r->headers_in.expect->value; + + if (expect->len != sizeof("100-continue") - 1 + || ngx_strncasecmp(expect->data, (u_char *) "100-continue", + sizeof("100-continue") - 1) + != 0) + { + return NGX_OK; + } + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "send 100 Continue"); + + n = r->connection->send(r->connection, + (u_char *) "HTTP/1.1 100 Continue" CRLF CRLF, + sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1); + + if (n == sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1) { + return NGX_OK; + } + + /* we assume that such small packet should be send successfully */ + + r->connection->error = 1; + + return NGX_ERROR; +} + + +static ngx_int_t +ngx_http_request_body_filter(ngx_http_request_t *r, ngx_chain_t *in) +{ + if (r->headers_in.chunked) { + return ngx_http_request_body_chunked_filter(r, in); + + } else { + return ngx_http_request_body_length_filter(r, in); + } +} + + +static ngx_int_t +ngx_http_request_body_length_filter(ngx_http_request_t *r, ngx_chain_t *in) +{ + size_t size; + ngx_int_t rc; + ngx_buf_t *b; + ngx_chain_t *cl, *tl, *out, **ll; + ngx_http_request_body_t *rb; + + rb = r->request_body; + + if (rb->rest == -1) { + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http request body content length filter"); + + rb->rest = r->headers_in.content_length_n; + } + + out = NULL; + ll = &out; + + for (cl = in; cl; cl = cl->next) { + + if (rb->rest == 0) { + break; + } + + tl = ngx_chain_get_free_buf(r->pool, &rb->free); + if (tl == NULL) { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } + + b = tl->buf; + + ngx_memzero(b, sizeof(ngx_buf_t)); + + b->temporary = 1; + b->tag = (ngx_buf_tag_t) &ngx_http_read_client_request_body; + b->start = cl->buf->pos; + b->pos = cl->buf->pos; + b->last = cl->buf->last; + b->end = cl->buf->end; + b->flush = r->request_body_no_buffering; + + size = cl->buf->last - cl->buf->pos; + + if ((off_t) size < rb->rest) { + cl->buf->pos = cl->buf->last; + rb->rest -= size; + + } else { + cl->buf->pos += (size_t) rb->rest; + rb->rest = 0; + b->last = cl->buf->pos; + b->last_buf = 1; + } + + *ll = tl; + ll = &tl->next; + } + + rc = ngx_http_top_request_body_filter(r, out); + + ngx_chain_update_chains(r->pool, &rb->free, &rb->busy, &out, + (ngx_buf_tag_t) &ngx_http_read_client_request_body); + + return rc; +} + + +static ngx_int_t +ngx_http_request_body_chunked_filter(ngx_http_request_t *r, ngx_chain_t *in) +{ + size_t size; + ngx_int_t rc; + ngx_buf_t *b; + ngx_chain_t *cl, *out, *tl, **ll; + ngx_http_request_body_t *rb; + ngx_http_core_loc_conf_t *clcf; + + rb = r->request_body; + + if (rb->rest == -1) { + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http request body chunked filter"); + + rb->chunked = ngx_pcalloc(r->pool, sizeof(ngx_http_chunked_t)); + if (rb->chunked == NULL) { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } + + r->headers_in.content_length_n = 0; + rb->rest = 3; + } + + out = NULL; + ll = &out; + + for (cl = in; cl; cl = cl->next) { + + for ( ;; ) { + + ngx_log_debug7(NGX_LOG_DEBUG_EVENT, r->connection->log, 0, + "http body chunked buf " + "t:%d f:%d %p, pos %p, size: %z file: %O, size: %O", + cl->buf->temporary, cl->buf->in_file, + cl->buf->start, cl->buf->pos, + cl->buf->last - cl->buf->pos, + cl->buf->file_pos, + cl->buf->file_last - cl->buf->file_pos); + + rc = ngx_http_parse_chunked(r, cl->buf, rb->chunked); + + if (rc == NGX_OK) { + + /* a chunk has been parsed successfully */ + + clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); + + if (clcf->client_max_body_size + && clcf->client_max_body_size + - r->headers_in.content_length_n < rb->chunked->size) + { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "client intended to send too large chunked " + "body: %O+%O bytes", + r->headers_in.content_length_n, + rb->chunked->size); + + r->lingering_close = 1; + + return NGX_HTTP_REQUEST_ENTITY_TOO_LARGE; + } + + tl = ngx_chain_get_free_buf(r->pool, &rb->free); + if (tl == NULL) { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } + + b = tl->buf; + + ngx_memzero(b, sizeof(ngx_buf_t)); + + b->temporary = 1; + b->tag = (ngx_buf_tag_t) &ngx_http_read_client_request_body; + b->start = cl->buf->pos; + b->pos = cl->buf->pos; + b->last = cl->buf->last; + b->end = cl->buf->end; + b->flush = r->request_body_no_buffering; + + *ll = tl; + ll = &tl->next; + + size = cl->buf->last - cl->buf->pos; + + if ((off_t) size > rb->chunked->size) { + cl->buf->pos += (size_t) rb->chunked->size; + r->headers_in.content_length_n += rb->chunked->size; + rb->chunked->size = 0; + + } else { + rb->chunked->size -= size; + r->headers_in.content_length_n += size; + cl->buf->pos = cl->buf->last; + } + + b->last = cl->buf->pos; + + continue; + } + + if (rc == NGX_DONE) { + + /* a whole response has been parsed successfully */ + + rb->rest = 0; + + tl = ngx_chain_get_free_buf(r->pool, &rb->free); + if (tl == NULL) { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } + + b = tl->buf; + + ngx_memzero(b, sizeof(ngx_buf_t)); + + b->last_buf = 1; + + *ll = tl; + ll = &tl->next; + + break; + } + + if (rc == NGX_AGAIN) { + + /* set rb->rest, amount of data we want to see next time */ + + rb->rest = rb->chunked->length; + + break; + } + + /* invalid */ + + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "client sent invalid chunked body"); + + return NGX_HTTP_BAD_REQUEST; + } + } + + rc = ngx_http_top_request_body_filter(r, out); + + ngx_chain_update_chains(r->pool, &rb->free, &rb->busy, &out, + (ngx_buf_tag_t) &ngx_http_read_client_request_body); + + return rc; +} + + +ngx_int_t +ngx_http_request_body_save_filter(ngx_http_request_t *r, ngx_chain_t *in) +{ + ngx_buf_t *b; + ngx_chain_t *cl; + ngx_http_request_body_t *rb; + + rb = r->request_body; + +#if (NGX_DEBUG) + +#if 0 + for (cl = rb->bufs; cl; cl = cl->next) { + ngx_log_debug7(NGX_LOG_DEBUG_EVENT, r->connection->log, 0, + "http body old buf t:%d f:%d %p, pos %p, size: %z " + "file: %O, size: %O", + cl->buf->temporary, cl->buf->in_file, + cl->buf->start, cl->buf->pos, + cl->buf->last - cl->buf->pos, + cl->buf->file_pos, + cl->buf->file_last - cl->buf->file_pos); + } +#endif + + for (cl = in; cl; cl = cl->next) { + ngx_log_debug7(NGX_LOG_DEBUG_EVENT, r->connection->log, 0, + "http body new buf t:%d f:%d %p, pos %p, size: %z " + "file: %O, size: %O", + cl->buf->temporary, cl->buf->in_file, + cl->buf->start, cl->buf->pos, + cl->buf->last - cl->buf->pos, + cl->buf->file_pos, + cl->buf->file_last - cl->buf->file_pos); + } + +#endif + + /* TODO: coalesce neighbouring buffers */ + + if (ngx_chain_add_copy(r->pool, &rb->bufs, in) != NGX_OK) { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } + + if (r->request_body_no_buffering) { + return NGX_OK; + } + + if (rb->rest > 0) { + + if (rb->buf && rb->buf->last == rb->buf->end + && ngx_http_write_request_body(r) != NGX_OK) + { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } + + return NGX_OK; + } + + /* rb->rest == 0 */ + + if (rb->temp_file || r->request_body_in_file_only) { + + 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; + } + } + + return NGX_OK; +} |