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Fixed "zero size buf in output" alerts.

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If a request had an empty request body (with Content-Length: 0), and there
were preread data available (e.g., due to a pipelined request in the buffer),
the "zero size buf in output" alert might be logged while proxying the
request to an upstream.

Similar alerts appeared with client_body_in_file_only if a request had an
empty request body.
This commit is contained in:
Maxim Dounin 2014-01-04 03:32:22 +04:00
parent eb60e1e26d
commit 8f702a573a
1 changed files with 43 additions and 27 deletions
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70
src/http/ngx_http_request_body.c
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@ -150,21 +150,27 @@ ngx_http_read_client_request_body(ngx_http_request_t *r,
goto done;
}
cl = ngx_chain_get_free_buf(r->pool, &rb->free);
if (cl == NULL) {
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;
}
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;
}
post_handler(r);
@ -375,20 +381,26 @@ ngx_http_do_read_client_request_body(ngx_http_request_t *r)
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
cl = ngx_chain_get_free_buf(r->pool, &rb->free);
if (cl == NULL) {
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;
}
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;
}
r->read_event_handler = ngx_http_block_reading;
@ -843,6 +855,10 @@ ngx_http_request_body_length_filter(ngx_http_request_t *r, ngx_chain_t *in)
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;