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nginx-0.0.1-2003-10-14-19:06:38 import

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This commit is contained in:
Igor Sysoev 2003-10-14 15:06:38 +00:00
parent 1be6fcf207
commit e4aabac04e
3 changed files with 173 additions and 309 deletions
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5
src/core/ngx_hunk.h
View File

@ -85,6 +85,11 @@ typedef struct {
(h->type == (h->type & (NGX_HUNK_FLUSH|NGX_HUNK_LAST)))
#define nxg_hunk_size(h) \
(h->type & NGX_HUNK_IN_MEMORY) ? h->last - h->pos: \
(size_t) h->file_last - h->file_pos
ngx_hunk_t *ngx_create_temp_hunk(ngx_pool_t *pool, int size,
int before, int after);

475
src/event/ngx_event_proxy.c
View File

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

2
src/event/ngx_event_proxy.h
View File

@ -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_ */