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https://github.com/nginx/nginx.git
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nginx-0.0.1-2003-10-14-19:06:38 import
This commit is contained in:
Igor Sysoev
parent
1be6fcf207
commit
e4aabac04e
@ -85,6 +85,11 @@ typedef struct {
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(h->type == (h->type & (NGX_HUNK_FLUSH|NGX_HUNK_LAST)))
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#define nxg_hunk_size(h) \
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(h->type & NGX_HUNK_IN_MEMORY) ? h->last - h->pos: \
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(size_t) h->file_last - h->file_pos
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ngx_hunk_t *ngx_create_temp_hunk(ngx_pool_t *pool, int size,
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int before, int after);
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@ -5,32 +5,13 @@
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#include <ngx_event_proxy.h>
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#define NGX_EVENT_COPY_FILTER 0
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#if (NGX_EVENT_COPY_FILTER)
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static int ngx_event_proxy_copy_input_filter(ngx_event_proxy_t *p,
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ngx_chain_t *chain);
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#endif
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int ngx_event_proxy_read_upstream(ngx_event_proxy_t *p)
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{
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int n, rc, size;
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ngx_hunk_t *h, *nh;
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ngx_chain_t *chain, *rest, *ce, *next;
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#if (NGX_SUPPRESS_WARN)
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rest = NULL;
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#endif
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#if (NGX_EVENT_COPY_FILTER)
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if (p->input_filter == NULL) {
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p->input_filter = ngx_event_proxy_copy_input_filter;
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}
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#endif
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p->upstream_level++;
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@ -65,23 +46,33 @@ ngx_log_debug(p->log, "preread: %d" _ n);
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"readv() failed");
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p->upstream_error = 1;
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return NGX_ERROR;
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} else if (p->upstream->read->eof
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&& p->upstream->read->available == 0) {
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p->upstream_eof = 1;
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break;
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}
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if ((p->upstream_eof || p->upstream_error)
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&& p->free_raw_hunk)
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{
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if (p->input_filter(p->input_data, p->free_raw_hunk->hunk)
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== NGX_ERROR) {
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return NGX_ABORT;
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}
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/* TODO: p->free_raw_hunk->next can be free()ed */
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p->free_raw_hunk = p->free_raw_hunk->next;
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}
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break;
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}
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#endif
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if (p->free_hunks) {
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if (p->free_raw_hunks) {
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/* use the free hunks if they exist */
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chain = p->free_hunks;
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p->free_hunks = NULL;
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chain = p->free_raw_hunks;
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p->free_raw_hunks = NULL;
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ngx_log_debug(p->log, "free hunk: %08X:%d" _ chain->hunk _
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chain->hunk->end - chain->hunk->last);
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@ -100,21 +91,11 @@ ngx_log_debug(p->log, "free hunk: %08X:%d" _ chain->hunk _
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ngx_log_debug(p->log, "new hunk: %08X" _ chain->hunk);
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} else if (p->file_hunks) {
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/* use the file hunks if they exist */
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chain = p->file_hunks;
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p->file_hunks = NULL;
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ngx_log_debug(p->log, "file hunk: %08X" _ chain->hunk _
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chain->hunk->end - chain->hunk->last);
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} else if (!p->cachable && p->downstream->write->ready) {
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/*
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* if the hunks are not needed to be saved in a cache and
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* a downstream is ready then write the hunks to a downstream
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* If the hunks are not needed to be saved in a cache and
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* a downstream is ready then write the hunks to a downstream.
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*/
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ngx_log_debug(p->log, "downstream ready");
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@ -124,22 +105,33 @@ ngx_log_debug(p->log, "downstream ready");
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} else if (p->temp_offset < p->max_temp_file_size) {
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/*
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* if it's allowed then save the incoming hunks to a temporary
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* file, move the saved read hunks to a file chain,
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* convert the incoming hunks into the file hunks
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* and add them to an outgoing chain
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* If it's allowed then save some hunks from r->in
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* to a temporary file, and add them to a r->out chain.
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*/
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rc = ngx_event_proxy_write_chain_to_temp_file(p);
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ngx_log_debug(p->log, "temp offset: %d" _ p->temp_offset);
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if (rc == NGX_AGAIN) {
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if (ngx_event_flags & NGX_USE_LEVEL_EVENT
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&& p->upstream->read->active
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&& p->upstream->read->ready)
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{
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if (ngx_del_event(p->upstream->read, NGX_READ_EVENT, 0)
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== NGX_ERROR)
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{
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return NGX_ABORT;
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}
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}
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}
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if (rc != NGX_OK) {
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return rc;
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}
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chain = p->file_hunks;
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p->file_hunks = NULL;
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chain = p->free_raw_hunks;
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p->free_raw_hunks = NULL;
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ngx_log_debug(p->log, "new file hunk: %08X:%d" _ chain->hunk _
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chain->hunk->end - chain->hunk->last);
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@ -163,14 +155,11 @@ ngx_log_debug(p->log, "recv_chain: %d" _ n);
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}
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if (n == NGX_AGAIN) {
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if (ngx_handle_read_event(p->upstream->read) == NGX_ERROR) {
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return NGX_ABORT;
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}
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break;
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}
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if (n == 0) {
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THINK
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if (chain->hunk->shadow == NULL) {
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p->free_hunks = chain;
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}
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@ -181,12 +170,37 @@ ngx_log_debug(p->log, "recv_chain: %d" _ n);
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}
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/*
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* move the full hunks to a read chain, the partial filled hunk
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* to a free chain, and remove the shadow links for these hunks
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*/
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for (ce = chain; ce && n > 0; ce = ce->next) {
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size = ce->hunk->end - ce->hunk->last;
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if (n >= size) {
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ce->hunk->last = ce->hunk->end;
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if (p->input_filter(p->input_data, ce->hunk) == NGX_ERROR) {
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return NGX_ABORT;
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}
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n -= size;
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} else if (p->upstream_eof || p->upstream_error) {
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if (p->input_filter(p->input_data, ce->hunk) == NGX_ERROR) {
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return NGX_ABORT;
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}
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} else {
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ce->hunk->last += n;
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n = 0;
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}
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for (ce = chain; ce && n > 0; ce = next) {
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next = ce->next;
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ce->next = NULL;
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@ -226,26 +240,6 @@ ngx_log_debug(p->log, "recv_chain: %d" _ n);
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n -= size;
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#if !(NGX_EVENT_COPY_FILTER)
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if (p->input_filter) {
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continue;
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}
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/* the inline copy input filter */
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ngx_test_null(h, ngx_alloc_hunk(p->pool), NGX_ABORT);
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ngx_memcpy(h, ce->hunk, sizeof(ngx_hunk_t));
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h->shadow = ce->hunk;
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h->type |= NGX_HUNK_LAST_SHADOW|NGX_HUNK_RECYCLED;
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ce->hunk->shadow = h;
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ngx_alloc_ce_and_set_hunk(te, h, p->pool, NGX_ABORT);
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ngx_chain_add_ce(p->in_hunks, p->last_in_hunk, te);
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#endif
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} else {
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ce->hunk->last += n;
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p->free_hunks = ce;
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@ -263,10 +257,8 @@ ngx_log_debug(p->log, "recv_chain: %d" _ n);
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* from a read chain to an incoming chain
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*/
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if (p->input_filter) {
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if (p->input_filter(p, chain) == NGX_ERROR) {
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return NGX_ABORT;
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}
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if (p->input_filter(p, chain) == NGX_ERROR) {
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return NGX_ABORT;
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}
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ngx_log_debug(p->log, "rest chain: %08X" _ ce);
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@ -378,7 +370,7 @@ ngx_log_debug(p->log, "eof: %d" _ p->upstream_eof);
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ngx_log_debug(p->log, "upstream level: %d" _ p->upstream_level);
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if (p->upstream_level == 0) {
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if (ngx_handler_read_event(p->upstream->read) == NGX_ERROR) {
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if (ngx_handle_read_event(p->upstream->read) == NGX_ERROR) {
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return NGX_ABORT;
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}
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}
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@ -395,22 +387,26 @@ ngx_log_debug(p->log, "upstream level: %d" _ p->upstream_level);
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int ngx_event_proxy_write_to_downstream(ngx_event_proxy_t *p)
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{
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ngx_chain_t *out, *ce;
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ngx_event_proxy_downstream_t *d;
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d = &p->downstream;
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for ( ;; ) {
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if (!d->write->ready || p->busy_hunks_num == p->max_busy_hunks) {
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break;
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}
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while (p->downstream->write->ready) {
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if (p->out) {
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out = p->out;
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if (p->busy_len + ngx_hunk_size(out->hunk)) > p->max_busy_len) {
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break;
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}
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p->out = p->out->next;
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ngx_remove_shadow_free_raw_hunk(&p->free_raw_hunks, out->hunk);
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} else if (!p->cachable && p->in) {
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out = p->in;
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if (p->busy_len + ngx_hunk_size(out->hunk)) > p->max_busy_len) {
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break;
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}
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p->in = p->in->next;
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} else {
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@ -421,27 +417,29 @@ int ngx_event_proxy_write_to_downstream(ngx_event_proxy_t *p)
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rc = p->output_filter(p->output_data, out->hunk);
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ngx_chain_update_chains(p->shadow_free, p->busy, out);
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ngx_chain_update_chains(p->free, p->busy, out);
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for (ce = p->shadow_free; ce; ce = ce->next) {
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/* calculate p->busy_len */
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if (ce->hunk->type & NGX_LAST_SHADOW_HUNK) {
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h = ce->hunk->shadow;
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h->type = (NGX_HUNK_TEMP|NGX_HUNK_IN_MEMORY|NGX_HUNK_RECYCLED);
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h->pos = p->last = h->start;
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h->shadow = NULL;
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ngx_alloc_ce_and_set_hunk(te, h, p->pool, NGX_ABORT);
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te->next = p->free;
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p->free = te;
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}
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p->busy_len = 0;
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for (ce = p->busy; ce; ce = ce->next) {
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p->busy_len += ngx_hunk_size(ce->hunk);
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}
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p->busy_hunks_num = 0;
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for (ce = p->busy; ce; ce = ce->next) {
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if (ce->hunk->type & NGX_LAST_SHADOW_HUNK) {
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p->busy_hunks_num++;
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/* add the free shadow raw hunks to p->free_raw_hunks */
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for (ce = p->free; ce; ce = ce->next) {
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if (ce->hunk->type & NGX_HUNK_LAST_SHADOW) {
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h = ce->hunk->shadow;
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/* THINK NEEDED ??? */ h->pos = h->last = h->start;
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h->shadow = NULL;
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ngx_alloc_ce_and_set_hunk(te, ce->hunk->shadow, p->pool,
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NGX_ABORT);
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ngx_add_after_partially_filled_hunk(p->free_raw_hunks, te);
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ce->hunk->type &= ~NGX_HUNK_LAST_SHADOW;
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}
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ce->hunk->shadow = NULL;
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}
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if (p->upstream.read->ready)
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@ -451,8 +449,8 @@ int ngx_event_proxy_write_to_downstream(ngx_event_proxy_t *p)
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}
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}
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if (d->level == 0) {
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if (ngx_handler_write_event(d->write) == NGX_ERROR) {
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if (p->downstream_level == 0) {
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if (ngx_handler_write_event(p->downstream->write) == NGX_ERROR) {
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return NGX_ABORT;
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}
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}
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@ -465,184 +463,6 @@ int ngx_event_proxy_write_to_downstream(ngx_event_proxy_t *p)
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}
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int ngx_event_proxy_write_to_downstream(ngx_event_proxy_t *p)
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{
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int rc;
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ngx_hunk_t *h;
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ngx_chain_t *entry;
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#if 0
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if (p->upstream_level == 0
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&& p->downstream_level == 0
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&& p->busy_hunk == NULL
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&& p->out_hunks == NULL
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&& p->in_hunks == NULL
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&& ngx_event_flags & NGX_USE_LEVEL_EVENT)
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{
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if (ngx_del_event(p->downstream->write, NGX_WRITE_EVENT, 0)
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== NGX_ERROR) {
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return NGX_ABORT;
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}
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p->downstream->write->blocked = 1;
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return NGX_AGAIN;
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}
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#endif
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p->downstream_level++;
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ngx_log_debug(p->log, "write to downstream");
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entry = NULL;
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h = p->busy_hunk;
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for ( ;; ) {
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if (h == NULL) {
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if (p->out_hunks) {
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entry = p->out_hunks;
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p->out_hunks = entry->next;
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h = entry->hunk;
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entry->next = NULL;
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if (p->file_hunks) {
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if (p->file_hunks->hunk == h->shadow) {
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p->file_hunks = p->file_hunks->next;
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}
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}
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} else if (p->cachable == 0 && p->in_hunks) {
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entry = p->in_hunks;
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p->in_hunks = entry->next;
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h = entry->hunk;
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entry->next = NULL;
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if (p->read_hunks) {
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if (p->read_hunks->hunk == h->shadow) {
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p->read_hunks = p->read_hunks->next;
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} else {
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ngx_log_error(NGX_LOG_CRIT, p->log, 0, "ERROR0");
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}
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}
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}
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ngx_log_debug(p->log, "event proxy write hunk: %08X" _ h);
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if (h == NULL) {
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break;
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}
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}
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#if 0
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ngx_log_debug(p->log, "event proxy write: %d" _ h->last - h->pos);
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#endif
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rc = p->output_filter(p->output_data, h);
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ngx_log_debug(p->log, "event proxy: %d" _ rc);
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if (rc == NGX_ERROR) {
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p->downstream_error = 1;
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return NGX_ERROR;
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}
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if (rc == NGX_AGAIN) {
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#if 0
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|| (h->type & NGX_HUNK_IN_MEMORY && h->pos < h->last)
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|| (h->type & NGX_HUNK_FILE && h->file_pos < h->file_last)
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#endif
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if (p->busy_hunk == NULL) {
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p->busy_hunk = h;
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}
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if (p->downstream->write->blocked) {
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if (ngx_add_event(p->downstream->write, NGX_WRITE_EVENT,
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NGX_LEVEL_EVENT) == NGX_ERROR) {
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return NGX_ABORT;
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}
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p->downstream->write->blocked = 0;
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}
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p->downstream_level--;
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return NGX_AGAIN;
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}
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p->busy_hunk = NULL;
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/* if the complete hunk is the file hunk and it has a shadow read hunk
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then add a shadow read hunk to a free chain */
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if (h->type & NGX_HUNK_FILE) {
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if (p->cachable == 0 && p->out_hunks == NULL) {
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p->temp_offset = 0;
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}
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}
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if ((h->type & NGX_HUNK_LAST_SHADOW) == 0) {
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h = NULL;
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continue;
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}
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|
||||
|
||||
h->shadow->shadow = NULL;
|
||||
h = h->shadow;
|
||||
|
||||
#if 0
|
||||
/* free the unneeded hunk */
|
||||
|
||||
if (p->upstream_eof) {
|
||||
ngx_free_hunk(p->pool, h);
|
||||
h = NULL;
|
||||
continue;
|
||||
}
|
||||
#endif
|
||||
|
||||
h->pos = h->last = h->start;
|
||||
|
||||
if (entry == NULL) {
|
||||
h = NULL;
|
||||
continue;
|
||||
}
|
||||
|
||||
entry->hunk = h;
|
||||
|
||||
/* if the first hunk in a free chain is partially filled
|
||||
then add the complete hunk after the first free hunk */
|
||||
|
||||
if (p->free_hunks
|
||||
&& p->free_hunks->hunk->start != p->free_hunks->hunk->last)
|
||||
{
|
||||
entry->next = p->free_hunks->next;
|
||||
p->free_hunks->next = entry;
|
||||
|
||||
} else {
|
||||
entry->next = p->free_hunks;
|
||||
p->free_hunks = entry;
|
||||
}
|
||||
|
||||
h = NULL;
|
||||
}
|
||||
|
||||
if (p->upstream->read->ready) {
|
||||
if (ngx_event_proxy_read_upstream(p) == NGX_ERROR) {
|
||||
return NGX_ABORT;
|
||||
}
|
||||
}
|
||||
|
||||
p->downstream_level--;
|
||||
|
||||
ngx_log_debug(p->log, "downstream level: %d" _ p->downstream_level);
|
||||
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
|
||||
int ngx_event_proxy_write_chain_to_temp_file(ngx_event_proxy_t *p)
|
||||
{
|
||||
int rc, size;
|
||||
@ -748,43 +568,82 @@ ngx_log_debug(p->log, "event proxy file hunk: %08X:%08X" _ h _ h->shadow);
|
||||
}
|
||||
|
||||
|
||||
#if (NGX_EVENT_COPY_FILTER)
|
||||
|
||||
/* the copy input filter */
|
||||
|
||||
static int ngx_event_proxy_copy_input_filter(ngx_event_proxy_t *p,
|
||||
ngx_chain_t *chain)
|
||||
int ngx_event_proxy_copy_input_filter(ngx_event_proxy_t *p, ngx_hunk_t *hunk)
|
||||
{
|
||||
ngx_hunk_t *h;
|
||||
ngx_chain_t *ce, *temp;
|
||||
|
||||
if (p->upstream_eof) {
|
||||
|
||||
/* TODO: comment */
|
||||
|
||||
ce = p->free_hunks;
|
||||
|
||||
ngx_chain_add_ce(p->in_hunk, p->last_in_hunk, ce);
|
||||
|
||||
p->free_hunks = ce->next;
|
||||
ce->next = NULL;
|
||||
ngx_chain_t *ce;
|
||||
|
||||
if (hunk->pos == hunk->last) {
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
for (ce = chain; ce; ce = ce->next) {
|
||||
if (p->free) {
|
||||
h = p->free->hunk;
|
||||
p->free = p->free->next;
|
||||
|
||||
} else {
|
||||
ngx_test_null(h, ngx_alloc_hunk(p->pool), NGX_ERROR);
|
||||
ngx_memcpy(h, ce->hunk, sizeof(ngx_hunk_t));
|
||||
h->shadow = ce->hunk;
|
||||
h->type |= NGX_HUNK_LAST_SHADOW|NGX_HUNK_RECYCLED;
|
||||
ce->hunk->shadow = h;
|
||||
|
||||
ngx_alloc_ce_and_set_hunk(te, h, p->pool, NGX_ERROR);
|
||||
|
||||
ngx_chain_add_ce(p->in_hunk, p->last_in_hunk, te);
|
||||
}
|
||||
|
||||
ngx_memcpy(h, hunk, sizeof(ngx_hunk_t));
|
||||
h->shadow = hunk;
|
||||
h->type |= NGX_HUNK_LAST_SHADOW|NGX_HUNK_RECYCLED;
|
||||
hunk->shadow = h;
|
||||
|
||||
ngx_alloc_ce_and_set_hunk(ce, h, p->pool, NGX_ERROR);
|
||||
ngx_chain_add_ce(p->in_hunk, p->last_in_hunk, ce);
|
||||
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
ngx_inline static void ngx_remove_shadow_links(ngx_chain_t *ce)
|
||||
{
|
||||
for (
|
||||
}
|
||||
|
||||
|
||||
ngx_inline static void ngx_remove_shadow_free_raw_hunk(ngx_chain_t **free;
|
||||
ngx_hunk_t *h);
|
||||
{
|
||||
ngx_hunk_t *s;
|
||||
|
||||
if (h->shadow == NULL) {
|
||||
return;
|
||||
}
|
||||
|
||||
for (s = h->shadow; !(s->type & NGX_HUNK_LAST_SHADOW); s = s->shadow) {
|
||||
/* void */
|
||||
}
|
||||
|
||||
le = free;
|
||||
|
||||
for (ce = *free ; ce; ce = ce->next) {
|
||||
if (ce->hunk == s) {
|
||||
*le = ce->next;
|
||||
break;
|
||||
}
|
||||
|
||||
if (ce->hunk->shadow) {
|
||||
break;
|
||||
}
|
||||
|
||||
le = &ce->next;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
ngx_inline static void ngx_add_after_partially_filled_hunk(ngx_chain_t *chain,
|
||||
ngx_chain_t *ce)
|
||||
{
|
||||
if (chain->hunk->pos != chain->hunk->last) {
|
||||
ce->next = chain->next;
|
||||
chain->next = ce;
|
||||
|
||||
} else {
|
||||
ce->next = chain;
|
||||
chain = ce;
|
||||
}
|
||||
}
|
||||
|
||||
@ -76,7 +76,7 @@ struct ngx_event_proxy_s {
|
||||
|
||||
int ngx_event_proxy_read_upstream(ngx_event_proxy_t *p);
|
||||
int ngx_event_proxy_write_to_downstream(ngx_event_proxy_t *p);
|
||||
int ngx_event_proxy_write_chain_to_temp_file(ngx_event_proxy_t *p);
|
||||
int ngx_event_proxy_copy_input_filter(ngx_event_proxy_t *p, ngx_chain_t *chain);
|
||||
|
||||
|
||||
#endif /* _NGX_EVENT_PROXY_H_INCLUDED_ */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user