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#include "first.h"
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#include "plugin.h"
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#if defined(HAVE_GDBM_H) || defined(USE_MEMCACHED) /* at least one required */
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#include "base.h"
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#include "log.h"
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#include "buffer.h"
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#include "http_header.h"
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#include "keyvalue.h"
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <string.h>
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#if defined(HAVE_GDBM_H)
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#include "fdevent.h"
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# include <gdbm.h>
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#endif
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#if defined(USE_MEMCACHED)
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# include <libmemcached/memcached.h>
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#endif
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/**
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* this is a trigger_b4_dl for a lighttpd plugin
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*
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*/
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typedef struct {
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const buffer *deny_url;
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pcre_keyvalue_buffer *trigger_regex;
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pcre_keyvalue_buffer *download_regex;
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#if defined(HAVE_GDBM_H)
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GDBM_FILE db;
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#endif
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#if defined(USE_MEMCACHED)
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memcached_st *memc;
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const buffer *mc_namespace;
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#endif
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unsigned short trigger_timeout;
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unsigned short debug;
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} plugin_config;
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typedef struct {
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PLUGIN_DATA;
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plugin_config defaults;
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plugin_config conf;
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} plugin_data;
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INIT_FUNC(mod_trigger_b4_dl_init) {
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return calloc(1, sizeof(plugin_data));
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}
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FREE_FUNC(mod_trigger_b4_dl_free) {
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plugin_data *p = p_d;
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if (NULL == p->cvlist) return;
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/* (init i to 0 if global context; to 1 to skip empty global context) */
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for (int i = !p->cvlist[0].v.u2[1], used = p->nconfig; i < used; ++i) {
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config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0];
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for (; -1 != cpv->k_id; ++cpv) {
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if (cpv->vtype != T_CONFIG_LOCAL || NULL == cpv->v.v) continue;
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switch (cpv->k_id) {
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#if defined(HAVE_GDBM_H)
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case 0: /* trigger-before-download.gdbm-filename */
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gdbm_close(cpv->v.v);
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break;
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#endif
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case 1: /* trigger-before-download.trigger-url */
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pcre_keyvalue_buffer_free(cpv->v.v);
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break;
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case 2: /* trigger-before-download.download-url */
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pcre_keyvalue_buffer_free(cpv->v.v);
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break;
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#if defined(USE_MEMCACHED)
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case 5: /* trigger-before-download.memcache-hosts */
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memcached_free(cpv->v.v);
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break;
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#endif
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default:
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break;
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}
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}
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}
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}
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static int mod_trigger_b4_dl_init_gdbm(server * const srv, config_plugin_value_t * const cpv) {
|
[multiple] reduce redundant NULL buffer checks
This commit is a large set of code changes and results in removal of
hundreds, perhaps thousands, of CPU instructions, a portion of which
are on hot code paths.
Most (buffer *) used by lighttpd are not NULL, especially since buffers
were inlined into numerous larger structs such as request_st and chunk.
In the small number of instances where that is not the case, a NULL
check is often performed earlier in a function where that buffer is
later used with a buffer_* func. In the handful of cases that remained,
a NULL check was added, e.g. with r->http_host and r->conf.server_tag.
- check for empty strings at config time and set value to NULL if blank
string will be ignored at runtime; at runtime, simple pointer check
for NULL can be used to check for a value that has been set and is not
blank ("")
- use buffer_is_blank() instead of buffer_string_is_empty(),
and use buffer_is_unset() instead of buffer_is_empty(),
where buffer is known not to be NULL so that NULL check can be skipped
- use buffer_clen() instead of buffer_string_length() when buffer is
known not to be NULL (to avoid NULL check at runtime)
- use buffer_truncate() instead of buffer_string_set_length() to
truncate string, and use buffer_extend() to extend
Examples where buffer known not to be NULL:
- cpv->v.b from config_plugin_values_init is not NULL if T_CONFIG_BOOL
(though we might set it to NULL if buffer_is_blank(cpv->v.b))
- address of buffer is arg (&foo)
(compiler optimizer detects this in most, but not all, cases)
- buffer is checked for NULL earlier in func
- buffer is accessed in same scope without a NULL check (e.g. b->ptr)
internal behavior change:
callers must not pass a NULL buffer to some funcs.
- buffer_init_buffer() requires non-null args
- buffer_copy_buffer() requires non-null args
- buffer_append_string_buffer() requires non-null args
- buffer_string_space() requires non-null arg
1 year ago
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if (buffer_is_blank(cpv->v.b)) {
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cpv->v.v = NULL;
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return 1;
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}
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#if defined(HAVE_GDBM_H)
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GDBM_FILE db = gdbm_open(cpv->v.b->ptr, 4096, GDBM_WRCREAT | GDBM_NOLOCK,
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S_IRUSR | S_IWUSR, 0);
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if (db) {
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cpv->v.v = db;
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cpv->vtype = T_CONFIG_LOCAL;
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fdevent_setfd_cloexec(gdbm_fdesc(db));
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return 1;
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}
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else {
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log_error(srv->errh, __FILE__, __LINE__,
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"gdbm-open failed %s", cpv->v.b->ptr);
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return 0;
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}
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#else
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UNUSED(srv);
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return 1;
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#endif
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}
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static int mod_trigger_b4_dl_init_memcached(server * const srv, config_plugin_value_t * const cpv) {
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const array * const mc_hosts = cpv->v.a;
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if (0 == mc_hosts->used) {
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cpv->v.v = NULL;
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return 1;
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}
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#if defined(USE_MEMCACHED)
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buffer * const opts = srv->tmp_buf;
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buffer_clear(opts);
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for (uint32_t k = 0; k < mc_hosts->used; ++k) {
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const data_string * const ds = (const data_string *)mc_hosts->data[k];
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buffer_append_str2(opts, CONST_STR_LEN(" --SERVER="),
|
[multiple] reduce redundant NULL buffer checks
This commit is a large set of code changes and results in removal of
hundreds, perhaps thousands, of CPU instructions, a portion of which
are on hot code paths.
Most (buffer *) used by lighttpd are not NULL, especially since buffers
were inlined into numerous larger structs such as request_st and chunk.
In the small number of instances where that is not the case, a NULL
check is often performed earlier in a function where that buffer is
later used with a buffer_* func. In the handful of cases that remained,
a NULL check was added, e.g. with r->http_host and r->conf.server_tag.
- check for empty strings at config time and set value to NULL if blank
string will be ignored at runtime; at runtime, simple pointer check
for NULL can be used to check for a value that has been set and is not
blank ("")
- use buffer_is_blank() instead of buffer_string_is_empty(),
and use buffer_is_unset() instead of buffer_is_empty(),
where buffer is known not to be NULL so that NULL check can be skipped
- use buffer_clen() instead of buffer_string_length() when buffer is
known not to be NULL (to avoid NULL check at runtime)
- use buffer_truncate() instead of buffer_string_set_length() to
truncate string, and use buffer_extend() to extend
Examples where buffer known not to be NULL:
- cpv->v.b from config_plugin_values_init is not NULL if T_CONFIG_BOOL
(though we might set it to NULL if buffer_is_blank(cpv->v.b))
- address of buffer is arg (&foo)
(compiler optimizer detects this in most, but not all, cases)
- buffer is checked for NULL earlier in func
- buffer is accessed in same scope without a NULL check (e.g. b->ptr)
internal behavior change:
callers must not pass a NULL buffer to some funcs.
- buffer_init_buffer() requires non-null args
- buffer_copy_buffer() requires non-null args
- buffer_append_string_buffer() requires non-null args
- buffer_string_space() requires non-null arg
1 year ago
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BUF_PTR_LEN(&ds->value));
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}
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|
[multiple] reduce redundant NULL buffer checks
This commit is a large set of code changes and results in removal of
hundreds, perhaps thousands, of CPU instructions, a portion of which
are on hot code paths.
Most (buffer *) used by lighttpd are not NULL, especially since buffers
were inlined into numerous larger structs such as request_st and chunk.
In the small number of instances where that is not the case, a NULL
check is often performed earlier in a function where that buffer is
later used with a buffer_* func. In the handful of cases that remained,
a NULL check was added, e.g. with r->http_host and r->conf.server_tag.
- check for empty strings at config time and set value to NULL if blank
string will be ignored at runtime; at runtime, simple pointer check
for NULL can be used to check for a value that has been set and is not
blank ("")
- use buffer_is_blank() instead of buffer_string_is_empty(),
and use buffer_is_unset() instead of buffer_is_empty(),
where buffer is known not to be NULL so that NULL check can be skipped
- use buffer_clen() instead of buffer_string_length() when buffer is
known not to be NULL (to avoid NULL check at runtime)
- use buffer_truncate() instead of buffer_string_set_length() to
truncate string, and use buffer_extend() to extend
Examples where buffer known not to be NULL:
- cpv->v.b from config_plugin_values_init is not NULL if T_CONFIG_BOOL
(though we might set it to NULL if buffer_is_blank(cpv->v.b))
- address of buffer is arg (&foo)
(compiler optimizer detects this in most, but not all, cases)
- buffer is checked for NULL earlier in func
- buffer is accessed in same scope without a NULL check (e.g. b->ptr)
internal behavior change:
callers must not pass a NULL buffer to some funcs.
- buffer_init_buffer() requires non-null args
- buffer_copy_buffer() requires non-null args
- buffer_append_string_buffer() requires non-null args
- buffer_string_space() requires non-null arg
1 year ago
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cpv->v.v = memcached(opts->ptr+1, buffer_clen(opts)-1);
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if (cpv->v.v) {
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cpv->vtype = T_CONFIG_LOCAL;
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return 1;
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}
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else {
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log_error(srv->errh, __FILE__, __LINE__,
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"configuring memcached failed for option string: %s", opts->ptr);
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return 0;
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}
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#else
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log_error(srv->errh, __FILE__, __LINE__,
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"memcache support is not compiled in but "
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"trigger-before-download.memcache-hosts is set; aborting");
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return 0;
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#endif
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}
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static int mod_trigger_b4_dl_init_regex(server * const srv, config_plugin_value_t * const cpv, const char * const str) {
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const buffer * const b = cpv->v.b;
|
[multiple] reduce redundant NULL buffer checks
This commit is a large set of code changes and results in removal of
hundreds, perhaps thousands, of CPU instructions, a portion of which
are on hot code paths.
Most (buffer *) used by lighttpd are not NULL, especially since buffers
were inlined into numerous larger structs such as request_st and chunk.
In the small number of instances where that is not the case, a NULL
check is often performed earlier in a function where that buffer is
later used with a buffer_* func. In the handful of cases that remained,
a NULL check was added, e.g. with r->http_host and r->conf.server_tag.
- check for empty strings at config time and set value to NULL if blank
string will be ignored at runtime; at runtime, simple pointer check
for NULL can be used to check for a value that has been set and is not
blank ("")
- use buffer_is_blank() instead of buffer_string_is_empty(),
and use buffer_is_unset() instead of buffer_is_empty(),
where buffer is known not to be NULL so that NULL check can be skipped
- use buffer_clen() instead of buffer_string_length() when buffer is
known not to be NULL (to avoid NULL check at runtime)
- use buffer_truncate() instead of buffer_string_set_length() to
truncate string, and use buffer_extend() to extend
Examples where buffer known not to be NULL:
- cpv->v.b from config_plugin_values_init is not NULL if T_CONFIG_BOOL
(though we might set it to NULL if buffer_is_blank(cpv->v.b))
- address of buffer is arg (&foo)
(compiler optimizer detects this in most, but not all, cases)
- buffer is checked for NULL earlier in func
- buffer is accessed in same scope without a NULL check (e.g. b->ptr)
internal behavior change:
callers must not pass a NULL buffer to some funcs.
- buffer_init_buffer() requires non-null args
- buffer_copy_buffer() requires non-null args
- buffer_append_string_buffer() requires non-null args
- buffer_string_space() requires non-null arg
1 year ago
|
|
|
if (buffer_is_blank(b)) {
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cpv->v.v = NULL;
|
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return 1;
|
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|
|
|
}
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const int pcre_jit =
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!srv->srvconf.feature_flags
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|| config_plugin_value_tobool(
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array_get_element_klen(srv->srvconf.feature_flags,
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CONST_STR_LEN("server.pcre_jit")), 1);
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pcre_keyvalue_buffer * const kvb = pcre_keyvalue_buffer_init();
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buffer empty = { NULL, 0, 0 };
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if (!pcre_keyvalue_buffer_append(srv->errh, kvb, b, &empty, pcre_jit)) {
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log_error(srv->errh, __FILE__, __LINE__,
|
|
|
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"pcre_compile failed for %s %s", str, b->ptr);
|
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pcre_keyvalue_buffer_free(kvb);
|
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|
|
return 0;
|
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|
|
|
}
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cpv->v.v = kvb;
|
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|
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cpv->vtype = T_CONFIG_LOCAL;
|
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|
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return 1;
|
|
|
|
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}
|
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|
|
|
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|
|
#ifdef __COVERITY__
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|
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#include "burl.h"
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#endif
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static int mod_trigger_b4_dl_match(pcre_keyvalue_buffer * const kvb, const buffer * const input) {
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/*(re-use keyvalue.[ch] for match-only;
|
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|
|
* must have been configured with empty kvb 'value' during init)*/
|
|
|
|
|
pcre_keyvalue_ctx ctx = { NULL, NULL, 0, -1 };
|
|
|
|
|
#ifdef __COVERITY__
|
|
|
|
|
/*(again, must have been configured w/ empty kvb 'value' during init)*/
|
|
|
|
|
struct cond_match_t cache;
|
|
|
|
|
memset(&cache, 0, sizeof(cache));
|
|
|
|
|
struct burl_parts_t bp;
|
|
|
|
|
memset(&bp, 0, sizeof(bp));
|
|
|
|
|
ctx.cache = &cache;
|
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|
|
|
ctx.burl = &bp;
|
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|
|
|
#endif
|
|
|
|
|
return HANDLER_GO_ON == pcre_keyvalue_buffer_process(kvb, &ctx, input, NULL)
|
|
|
|
|
&& -1 != ctx.m;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
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static void mod_trigger_b4_dl_merge_config_cpv(plugin_config * const pconf, const config_plugin_value_t * const cpv) {
|
|
|
|
|
switch (cpv->k_id) { /* index into static config_plugin_keys_t cpk[] */
|
|
|
|
|
case 0: /* trigger-before-download.gdbm-filename */
|
|
|
|
|
#if defined(HAVE_GDBM_H)
|
|
|
|
|
if (cpv->vtype != T_CONFIG_LOCAL) break;
|
|
|
|
|
pconf->db = cpv->v.v;
|
|
|
|
|
#endif
|
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|
|
break;
|
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|
|
|
case 1: /* trigger-before-download.trigger-url */
|
|
|
|
|
if (cpv->vtype != T_CONFIG_LOCAL) break;
|
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|
|
|
pconf->trigger_regex = cpv->v.v;
|
|
|
|
|
break;
|
|
|
|
|
case 2: /* trigger-before-download.download-url */
|
|
|
|
|
if (cpv->vtype != T_CONFIG_LOCAL) break;
|
|
|
|
|
pconf->download_regex = cpv->v.v;
|
|
|
|
|
break;
|
|
|
|
|
case 3: /* trigger-before-download.deny-url */
|
|
|
|
|
pconf->deny_url = cpv->v.b;
|
|
|
|
|
break;
|
|
|
|
|
case 4: /* trigger-before-download.trigger-timeout */
|
|
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|
|
pconf->trigger_timeout = cpv->v.shrt;
|
|
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|
|
break;
|
|
|
|
|
case 5: /* trigger-before-download.memcache-hosts */
|
|
|
|
|
#if defined(USE_MEMCACHED)
|
|
|
|
|
if (cpv->vtype != T_CONFIG_LOCAL) break;
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|
pconf->memc = cpv->v.v;
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#endif
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break;
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|
case 6: /* trigger-before-download.memcache-namespace */
|
|
|
|
|
#if defined(USE_MEMCACHED)
|
|
|
|
|
pconf->mc_namespace = cpv->v.b;
|
|
|
|
|
#endif
|
|
|
|
|
break;
|
|
|
|
|
case 7: /* trigger-before-download.debug */
|
|
|
|
|
pconf->debug = cpv->v.u;
|
|
|
|
|
break;
|
|
|
|
|
default:/* should not happen */
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void mod_trigger_b4_dl_merge_config(plugin_config * const pconf, const config_plugin_value_t *cpv) {
|
|
|
|
|
do {
|
|
|
|
|
mod_trigger_b4_dl_merge_config_cpv(pconf, cpv);
|
|
|
|
|
} while ((++cpv)->k_id != -1);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void mod_trigger_b4_dl_patch_config(request_st * const r, plugin_data * const p) {
|
|
|
|
|
memcpy(&p->conf, &p->defaults, sizeof(plugin_config));
|
|
|
|
|
for (int i = 1, used = p->nconfig; i < used; ++i) {
|
|
|
|
|
if (config_check_cond(r, (uint32_t)p->cvlist[i].k_id))
|
|
|
|
|
mod_trigger_b4_dl_merge_config(&p->conf,
|
|
|
|
|
p->cvlist + p->cvlist[i].v.u2[0]);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
SETDEFAULTS_FUNC(mod_trigger_b4_dl_set_defaults) {
|
|
|
|
|
static const config_plugin_keys_t cpk[] = {
|
|
|
|
|
{ CONST_STR_LEN("trigger-before-download.gdbm-filename"),
|
|
|
|
|
T_CONFIG_STRING,
|
|
|
|
|
T_CONFIG_SCOPE_CONNECTION }
|
|
|
|
|
,{ CONST_STR_LEN("trigger-before-download.trigger-url"),
|
|
|
|
|
T_CONFIG_STRING,
|
|
|
|
|
T_CONFIG_SCOPE_CONNECTION }
|
|
|
|
|
,{ CONST_STR_LEN("trigger-before-download.download-url"),
|
|
|
|
|
T_CONFIG_STRING,
|
|
|
|
|
T_CONFIG_SCOPE_CONNECTION }
|
|
|
|
|
,{ CONST_STR_LEN("trigger-before-download.deny-url"),
|
|
|
|
|
T_CONFIG_STRING,
|
|
|
|
|
T_CONFIG_SCOPE_CONNECTION }
|
|
|
|
|
,{ CONST_STR_LEN("trigger-before-download.trigger-timeout"),
|
|
|
|
|
T_CONFIG_SHORT,
|
|
|
|
|
T_CONFIG_SCOPE_CONNECTION }
|
|
|
|
|
,{ CONST_STR_LEN("trigger-before-download.memcache-hosts"),
|
|
|
|
|
T_CONFIG_ARRAY_VLIST,
|
|
|
|
|
T_CONFIG_SCOPE_CONNECTION }
|
|
|
|
|
,{ CONST_STR_LEN("trigger-before-download.memcache-namespace"),
|
|
|
|
|
T_CONFIG_STRING,
|
|
|
|
|
T_CONFIG_SCOPE_CONNECTION }
|
|
|
|
|
,{ CONST_STR_LEN("trigger-before-download.debug"),
|
|
|
|
|
T_CONFIG_SHORT,
|
|
|
|
|
T_CONFIG_SCOPE_CONNECTION }
|
|
|
|
|
,{ NULL, 0,
|
|
|
|
|
T_CONFIG_UNSET,
|
|
|
|
|
T_CONFIG_SCOPE_UNSET }
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
plugin_data * const p = p_d;
|
|
|
|
|
if (!config_plugin_values_init(srv, p, cpk, "mod_trigger_b4_dl"))
|
|
|
|
|
return HANDLER_ERROR;
|
|
|
|
|
|
|
|
|
|
/* process and validate config directives
|
|
|
|
|
* (init i to 0 if global context; to 1 to skip empty global context) */
|
|
|
|
|
for (int i = !p->cvlist[0].v.u2[1]; i < p->nconfig; ++i) {
|
|
|
|
|
config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0];
|
|
|
|
|
for (; -1 != cpv->k_id; ++cpv) {
|
|
|
|
|
switch (cpv->k_id) {
|
|
|
|
|
case 0: /* trigger-before-download.gdbm-filename */
|
|
|
|
|
if (!mod_trigger_b4_dl_init_gdbm(srv, cpv))
|
|
|
|
|
return HANDLER_ERROR;
|
|
|
|
|
break;
|
|
|
|
|
case 1: /* trigger-before-download.trigger-url */
|
|
|
|
|
if (!mod_trigger_b4_dl_init_regex(srv, cpv, "trigger-url"))
|
|
|
|
|
return HANDLER_ERROR;
|
|
|
|
|
break;
|
|
|
|
|
case 2: /* trigger-before-download.download-url */
|
|
|
|
|
if (!mod_trigger_b4_dl_init_regex(srv, cpv, "download-url"))
|
|
|
|
|
return HANDLER_ERROR;
|
|
|
|
|
break;
|
|
|
|
|
case 3: /* trigger-before-download.deny-url */
|
|
|
|
|
case 4: /* trigger-before-download.trigger-timeout */
|
|
|
|
|
break;
|
|
|
|
|
case 5: /* trigger-before-download.memcache-hosts */
|
|
|
|
|
if (!mod_trigger_b4_dl_init_memcached(srv, cpv))
|
|
|
|
|
return HANDLER_ERROR;
|
|
|
|
|
break;
|
|
|
|
|
case 6: /* trigger-before-download.memcache-namespace */
|
|
|
|
|
case 7: /* trigger-before-download.debug */
|
|
|
|
|
break;
|
|
|
|
|
default:/* should not happen */
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* initialize p->defaults from global config context */
|
|
|
|
|
if (p->nconfig > 0 && p->cvlist->v.u2[1]) {
|
|
|
|
|
const config_plugin_value_t *cpv = p->cvlist + p->cvlist->v.u2[0];
|
|
|
|
|
if (-1 != cpv->k_id)
|
|
|
|
|
mod_trigger_b4_dl_merge_config(&p->defaults, cpv);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return HANDLER_GO_ON;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#if defined(USE_MEMCACHED)
|
|
|
|
|
static void mod_trigger_b4_dl_memcached_key(buffer * const b, const plugin_data * const p, const buffer * const remote_ip) {
|
|
|
|
|
buffer_clear(b);
|
|
|
|
|
if (p->conf.mc_namespace)
|
|
|
|
|
buffer_copy_buffer(b, p->conf.mc_namespace);
|
|
|
|
|
buffer_append_string_buffer(b, remote_ip);
|
|
|
|
|
|
|
|
|
|
/* memcached can't handle spaces */
|
[multiple] reduce redundant NULL buffer checks
This commit is a large set of code changes and results in removal of
hundreds, perhaps thousands, of CPU instructions, a portion of which
are on hot code paths.
Most (buffer *) used by lighttpd are not NULL, especially since buffers
were inlined into numerous larger structs such as request_st and chunk.
In the small number of instances where that is not the case, a NULL
check is often performed earlier in a function where that buffer is
later used with a buffer_* func. In the handful of cases that remained,
a NULL check was added, e.g. with r->http_host and r->conf.server_tag.
- check for empty strings at config time and set value to NULL if blank
string will be ignored at runtime; at runtime, simple pointer check
for NULL can be used to check for a value that has been set and is not
blank ("")
- use buffer_is_blank() instead of buffer_string_is_empty(),
and use buffer_is_unset() instead of buffer_is_empty(),
where buffer is known not to be NULL so that NULL check can be skipped
- use buffer_clen() instead of buffer_string_length() when buffer is
known not to be NULL (to avoid NULL check at runtime)
- use buffer_truncate() instead of buffer_string_set_length() to
truncate string, and use buffer_extend() to extend
Examples where buffer known not to be NULL:
- cpv->v.b from config_plugin_values_init is not NULL if T_CONFIG_BOOL
(though we might set it to NULL if buffer_is_blank(cpv->v.b))
- address of buffer is arg (&foo)
(compiler optimizer detects this in most, but not all, cases)
- buffer is checked for NULL earlier in func
- buffer is accessed in same scope without a NULL check (e.g. b->ptr)
internal behavior change:
callers must not pass a NULL buffer to some funcs.
- buffer_init_buffer() requires non-null args
- buffer_copy_buffer() requires non-null args
- buffer_append_string_buffer() requires non-null args
- buffer_string_space() requires non-null arg
1 year ago
|
|
|
for (size_t i = 0, len = buffer_clen(b); i < len; ++i) {
|
|
|
|
|
if (b->ptr[i] == ' ') b->ptr[i] = '-';
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
static handler_t mod_trigger_b4_dl_deny(request_st * const r, const plugin_data * const p) {
|
|
|
|
|
if (p->conf.deny_url) {
|
|
|
|
|
http_header_response_set(r, HTTP_HEADER_LOCATION,
|
|
|
|
|
CONST_STR_LEN("Location"),
|
[multiple] reduce redundant NULL buffer checks
This commit is a large set of code changes and results in removal of
hundreds, perhaps thousands, of CPU instructions, a portion of which
are on hot code paths.
Most (buffer *) used by lighttpd are not NULL, especially since buffers
were inlined into numerous larger structs such as request_st and chunk.
In the small number of instances where that is not the case, a NULL
check is often performed earlier in a function where that buffer is
later used with a buffer_* func. In the handful of cases that remained,
a NULL check was added, e.g. with r->http_host and r->conf.server_tag.
- check for empty strings at config time and set value to NULL if blank
string will be ignored at runtime; at runtime, simple pointer check
for NULL can be used to check for a value that has been set and is not
blank ("")
- use buffer_is_blank() instead of buffer_string_is_empty(),
and use buffer_is_unset() instead of buffer_is_empty(),
where buffer is known not to be NULL so that NULL check can be skipped
- use buffer_clen() instead of buffer_string_length() when buffer is
known not to be NULL (to avoid NULL check at runtime)
- use buffer_truncate() instead of buffer_string_set_length() to
truncate string, and use buffer_extend() to extend
Examples where buffer known not to be NULL:
- cpv->v.b from config_plugin_values_init is not NULL if T_CONFIG_BOOL
(though we might set it to NULL if buffer_is_blank(cpv->v.b))
- address of buffer is arg (&foo)
(compiler optimizer detects this in most, but not all, cases)
- buffer is checked for NULL earlier in func
- buffer is accessed in same scope without a NULL check (e.g. b->ptr)
internal behavior change:
callers must not pass a NULL buffer to some funcs.
- buffer_init_buffer() requires non-null args
- buffer_copy_buffer() requires non-null args
- buffer_append_string_buffer() requires non-null args
- buffer_string_space() requires non-null arg
1 year ago
|
|
|
BUF_PTR_LEN(p->conf.deny_url));
|
|
|
|
|
r->http_status = 307;
|
|
|
|
|
}
|
|
|
|
|
else {
|
|
|
|
|
log_error(r->conf.errh, __FILE__, __LINE__,
|
|
|
|
|
"trigger-before-download.deny-url not configured");
|
|
|
|
|
r->http_status = 500;
|
|
|
|
|
}
|
|
|
|
|
r->resp_body_finished = 1;
|
|
|
|
|
return HANDLER_FINISHED;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
URIHANDLER_FUNC(mod_trigger_b4_dl_uri_handler) {
|
|
|
|
|
plugin_data *p = p_d;
|
|
|
|
|
|
|
|
|
|
if (NULL != r->handler_module) return HANDLER_GO_ON;
|
|
|
|
|
|
|
|
|
|
mod_trigger_b4_dl_patch_config(r, p);
|
|
|
|
|
|
|
|
|
|
if (!p->conf.trigger_regex || !p->conf.download_regex) return HANDLER_GO_ON;
|
|
|
|
|
|
|
|
|
|
# if !defined(HAVE_GDBM_H) && !defined(USE_MEMCACHED)
|
|
|
|
|
return HANDLER_GO_ON;
|
|
|
|
|
# elif defined(HAVE_GDBM_H) && defined(USE_MEMCACHED)
|
|
|
|
|
if (!p->conf.db && !p->conf.memc) return HANDLER_GO_ON;
|
|
|
|
|
if (p->conf.db && p->conf.memc) {
|
|
|
|
|
/* can't decide which one */
|
|
|
|
|
|
|
|
|
|
return HANDLER_GO_ON;
|
|
|
|
|
}
|
|
|
|
|
# elif defined(HAVE_GDBM_H)
|
|
|
|
|
if (!p->conf.db) return HANDLER_GO_ON;
|
|
|
|
|
# else
|
|
|
|
|
if (!p->conf.memc) return HANDLER_GO_ON;
|
|
|
|
|
# endif
|
|
|
|
|
|
|
|
|
|
/* X-Forwarded-For contains the ip behind the proxy */
|
|
|
|
|
const buffer *remote_ip =
|
|
|
|
|
http_header_request_get(r, HTTP_HEADER_X_FORWARDED_FOR,
|
|
|
|
|
CONST_STR_LEN("X-Forwarded-For"));
|
|
|
|
|
if (NULL == remote_ip) {
|
|
|
|
|
remote_ip = &r->con->dst_addr_buf;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (p->conf.debug) {
|
|
|
|
|
log_error(r->conf.errh, __FILE__, __LINE__, "(debug) remote-ip: %s", remote_ip->ptr);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
const unix_time64_t cur_ts = log_epoch_secs;
|
|
|
|
|
|
|
|
|
|
/* check if URL is a trigger -> insert IP into DB */
|
|
|
|
|
if (mod_trigger_b4_dl_match(p->conf.trigger_regex, &r->uri.path)) {
|
|
|
|
|
/* the trigger matched */
|
|
|
|
|
# if defined(HAVE_GDBM_H)
|
|
|
|
|
if (p->conf.db) {
|
|
|
|
|
datum key, val;
|
|
|
|
|
|
|
|
|
|
*(const char **)&key.dptr = remote_ip->ptr;
|
[multiple] reduce redundant NULL buffer checks
This commit is a large set of code changes and results in removal of
hundreds, perhaps thousands, of CPU instructions, a portion of which
are on hot code paths.
Most (buffer *) used by lighttpd are not NULL, especially since buffers
were inlined into numerous larger structs such as request_st and chunk.
In the small number of instances where that is not the case, a NULL
check is often performed earlier in a function where that buffer is
later used with a buffer_* func. In the handful of cases that remained,
a NULL check was added, e.g. with r->http_host and r->conf.server_tag.
- check for empty strings at config time and set value to NULL if blank
string will be ignored at runtime; at runtime, simple pointer check
for NULL can be used to check for a value that has been set and is not
blank ("")
- use buffer_is_blank() instead of buffer_string_is_empty(),
and use buffer_is_unset() instead of buffer_is_empty(),
where buffer is known not to be NULL so that NULL check can be skipped
- use buffer_clen() instead of buffer_string_length() when buffer is
known not to be NULL (to avoid NULL check at runtime)
- use buffer_truncate() instead of buffer_string_set_length() to
truncate string, and use buffer_extend() to extend
Examples where buffer known not to be NULL:
- cpv->v.b from config_plugin_values_init is not NULL if T_CONFIG_BOOL
(though we might set it to NULL if buffer_is_blank(cpv->v.b))
- address of buffer is arg (&foo)
(compiler optimizer detects this in most, but not all, cases)
- buffer is checked for NULL earlier in func
- buffer is accessed in same scope without a NULL check (e.g. b->ptr)
internal behavior change:
callers must not pass a NULL buffer to some funcs.
- buffer_init_buffer() requires non-null args
- buffer_copy_buffer() requires non-null args
- buffer_append_string_buffer() requires non-null args
- buffer_string_space() requires non-null arg
1 year ago
|
|
|
key.dsize = buffer_clen(remote_ip);
|
|
|
|
|
|
|
|
|
|
val.dptr = (char *)&cur_ts;
|
|
|
|
|
val.dsize = sizeof(cur_ts);
|
|
|
|
|
|
|
|
|
|
if (0 != gdbm_store(p->conf.db, key, val, GDBM_REPLACE)) {
|
|
|
|
|
log_error(r->conf.errh, __FILE__, __LINE__, "insert failed");
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
# endif
|
|
|
|
|
# if defined(USE_MEMCACHED)
|
|
|
|
|
if (p->conf.memc) {
|
|
|
|
|
buffer * const b = r->tmp_buf;
|
|
|
|
|
mod_trigger_b4_dl_memcached_key(b, p, remote_ip);
|
|
|
|
|
|
|
|
|
|
if (p->conf.debug) {
|
|
|
|
|
log_error(r->conf.errh, __FILE__, __LINE__, "(debug) triggered IP: %s", b->ptr);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (MEMCACHED_SUCCESS != memcached_set(p->conf.memc,
|
[multiple] reduce redundant NULL buffer checks
This commit is a large set of code changes and results in removal of
hundreds, perhaps thousands, of CPU instructions, a portion of which
are on hot code paths.
Most (buffer *) used by lighttpd are not NULL, especially since buffers
were inlined into numerous larger structs such as request_st and chunk.
In the small number of instances where that is not the case, a NULL
check is often performed earlier in a function where that buffer is
later used with a buffer_* func. In the handful of cases that remained,
a NULL check was added, e.g. with r->http_host and r->conf.server_tag.
- check for empty strings at config time and set value to NULL if blank
string will be ignored at runtime; at runtime, simple pointer check
for NULL can be used to check for a value that has been set and is not
blank ("")
- use buffer_is_blank() instead of buffer_string_is_empty(),
and use buffer_is_unset() instead of buffer_is_empty(),
where buffer is known not to be NULL so that NULL check can be skipped
- use buffer_clen() instead of buffer_string_length() when buffer is
known not to be NULL (to avoid NULL check at runtime)
- use buffer_truncate() instead of buffer_string_set_length() to
truncate string, and use buffer_extend() to extend
Examples where buffer known not to be NULL:
- cpv->v.b from config_plugin_values_init is not NULL if T_CONFIG_BOOL
(though we might set it to NULL if buffer_is_blank(cpv->v.b))
- address of buffer is arg (&foo)
(compiler optimizer detects this in most, but not all, cases)
- buffer is checked for NULL earlier in func
- buffer is accessed in same scope without a NULL check (e.g. b->ptr)
internal behavior change:
callers must not pass a NULL buffer to some funcs.
- buffer_init_buffer() requires non-null args
- buffer_copy_buffer() requires non-null args
- buffer_append_string_buffer() requires non-null args
- buffer_string_space() requires non-null arg
1 year ago
|
|
|
BUF_PTR_LEN(b),
|
|
|
|
|
(const char *)&cur_ts, sizeof(cur_ts),
|
|
|
|
|
p->conf.trigger_timeout, 0)) {
|
|
|
|
|
log_error(r->conf.errh, __FILE__, __LINE__, "insert failed");
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
# endif
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* check if URL is a download -> check IP in DB, update timestamp */
|
|
|
|
|
if (mod_trigger_b4_dl_match(p->conf.download_regex, &r->uri.path)) {
|
|
|
|
|
/* the download uri matched */
|
|
|
|
|
# if defined(HAVE_GDBM_H)
|
|
|
|
|
if (p->conf.db) {
|
|
|
|
|
datum key, val;
|
|
|
|
|
unix_time64_t last_hit = 0;
|
|
|
|
|
|
|
|
|
|
*(const char **)&key.dptr = remote_ip->ptr;
|
[multiple] reduce redundant NULL buffer checks
This commit is a large set of code changes and results in removal of
hundreds, perhaps thousands, of CPU instructions, a portion of which
are on hot code paths.
Most (buffer *) used by lighttpd are not NULL, especially since buffers
were inlined into numerous larger structs such as request_st and chunk.
In the small number of instances where that is not the case, a NULL
check is often performed earlier in a function where that buffer is
later used with a buffer_* func. In the handful of cases that remained,
a NULL check was added, e.g. with r->http_host and r->conf.server_tag.
- check for empty strings at config time and set value to NULL if blank
string will be ignored at runtime; at runtime, simple pointer check
for NULL can be used to check for a value that has been set and is not
blank ("")
- use buffer_is_blank() instead of buffer_string_is_empty(),
and use buffer_is_unset() instead of buffer_is_empty(),
where buffer is known not to be NULL so that NULL check can be skipped
- use buffer_clen() instead of buffer_string_length() when buffer is
known not to be NULL (to avoid NULL check at runtime)
- use buffer_truncate() instead of buffer_string_set_length() to
truncate string, and use buffer_extend() to extend
Examples where buffer known not to be NULL:
- cpv->v.b from config_plugin_values_init is not NULL if T_CONFIG_BOOL
(though we might set it to NULL if buffer_is_blank(cpv->v.b))
- address of buffer is arg (&foo)
(compiler optimizer detects this in most, but not all, cases)
- buffer is checked for NULL earlier in func
- buffer is accessed in same scope without a NULL check (e.g. b->ptr)
internal behavior change:
callers must not pass a NULL buffer to some funcs.
- buffer_init_buffer() requires non-null args
- buffer_copy_buffer() requires non-null args
- buffer_append_string_buffer() requires non-null args
- buffer_string_space() requires non-null arg
1 year ago
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key.dsize = buffer_clen(remote_ip);
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val = gdbm_fetch(p->conf.db, key);
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if (val.dptr == NULL) {
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/* not found, redirect */
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return mod_trigger_b4_dl_deny(r, p);
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}
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if (val.dsize == sizeof(last_hit))
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memcpy(&last_hit, val.dptr, val.dsize);
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else if (val.dsize == 4) {
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int32_t t;
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memcpy(&t, val.dptr, val.dsize);
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last_hit = t;
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}
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free(val.dptr);
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if (cur_ts - last_hit > p->conf.trigger_timeout) {
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/* found, but timeout, redirect */
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if (p->conf.db) {
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if (0 != gdbm_delete(p->conf.db, key)) {
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log_error(r->conf.errh, __FILE__, __LINE__, "delete failed");
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}
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}
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return mod_trigger_b4_dl_deny(r, p);
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}
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val.dptr = (char *)&cur_ts;
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val.dsize = sizeof(cur_ts);
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if (0 != gdbm_store(p->conf.db, key, val, GDBM_REPLACE)) {
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log_error(r->conf.errh, __FILE__, __LINE__, "insert failed");
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}
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}
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# endif
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# if defined(USE_MEMCACHED)
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if (p->conf.memc) {
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buffer * const b = r->tmp_buf;
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mod_trigger_b4_dl_memcached_key(b, p, remote_ip);
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if (p->conf.debug) {
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log_error(r->conf.errh, __FILE__, __LINE__, "(debug) checking IP: %s", b->ptr);
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}
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/**
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*
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* memcached is do expiration for us, as long as we can fetch it every thing is ok
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* and the timestamp is updated
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*
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*/
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[multiple] reduce redundant NULL buffer checks
This commit is a large set of code changes and results in removal of
hundreds, perhaps thousands, of CPU instructions, a portion of which
are on hot code paths.
Most (buffer *) used by lighttpd are not NULL, especially since buffers
were inlined into numerous larger structs such as request_st and chunk.
In the small number of instances where that is not the case, a NULL
check is often performed earlier in a function where that buffer is
later used with a buffer_* func. In the handful of cases that remained,
a NULL check was added, e.g. with r->http_host and r->conf.server_tag.
- check for empty strings at config time and set value to NULL if blank
string will be ignored at runtime; at runtime, simple pointer check
for NULL can be used to check for a value that has been set and is not
blank ("")
- use buffer_is_blank() instead of buffer_string_is_empty(),
and use buffer_is_unset() instead of buffer_is_empty(),
where buffer is known not to be NULL so that NULL check can be skipped
- use buffer_clen() instead of buffer_string_length() when buffer is
known not to be NULL (to avoid NULL check at runtime)
- use buffer_truncate() instead of buffer_string_set_length() to
truncate string, and use buffer_extend() to extend
Examples where buffer known not to be NULL:
- cpv->v.b from config_plugin_values_init is not NULL if T_CONFIG_BOOL
(though we might set it to NULL if buffer_is_blank(cpv->v.b))
- address of buffer is arg (&foo)
(compiler optimizer detects this in most, but not all, cases)
- buffer is checked for NULL earlier in func
- buffer is accessed in same scope without a NULL check (e.g. b->ptr)
internal behavior change:
callers must not pass a NULL buffer to some funcs.
- buffer_init_buffer() requires non-null args
- buffer_copy_buffer() requires non-null args
- buffer_append_string_buffer() requires non-null args
- buffer_string_space() requires non-null arg
1 year ago
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if (MEMCACHED_SUCCESS != memcached_exist(p->conf.memc, BUF_PTR_LEN(b))) {
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return mod_trigger_b4_dl_deny(r, p);
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}
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/* set a new timeout */
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if (MEMCACHED_SUCCESS != memcached_set(p->conf.memc,
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[multiple] reduce redundant NULL buffer checks
This commit is a large set of code changes and results in removal of
hundreds, perhaps thousands, of CPU instructions, a portion of which
are on hot code paths.
Most (buffer *) used by lighttpd are not NULL, especially since buffers
were inlined into numerous larger structs such as request_st and chunk.
In the small number of instances where that is not the case, a NULL
check is often performed earlier in a function where that buffer is
later used with a buffer_* func. In the handful of cases that remained,
a NULL check was added, e.g. with r->http_host and r->conf.server_tag.
- check for empty strings at config time and set value to NULL if blank
string will be ignored at runtime; at runtime, simple pointer check
for NULL can be used to check for a value that has been set and is not
blank ("")
- use buffer_is_blank() instead of buffer_string_is_empty(),
and use buffer_is_unset() instead of buffer_is_empty(),
where buffer is known not to be NULL so that NULL check can be skipped
- use buffer_clen() instead of buffer_string_length() when buffer is
known not to be NULL (to avoid NULL check at runtime)
- use buffer_truncate() instead of buffer_string_set_length() to
truncate string, and use buffer_extend() to extend
Examples where buffer known not to be NULL:
- cpv->v.b from config_plugin_values_init is not NULL if T_CONFIG_BOOL
(though we might set it to NULL if buffer_is_blank(cpv->v.b))
- address of buffer is arg (&foo)
(compiler optimizer detects this in most, but not all, cases)
- buffer is checked for NULL earlier in func
- buffer is accessed in same scope without a NULL check (e.g. b->ptr)
internal behavior change:
callers must not pass a NULL buffer to some funcs.
- buffer_init_buffer() requires non-null args
- buffer_copy_buffer() requires non-null args
- buffer_append_string_buffer() requires non-null args
- buffer_string_space() requires non-null arg
1 year ago
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BUF_PTR_LEN(b),
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(const char *)&cur_ts, sizeof(cur_ts),
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p->conf.trigger_timeout, 0)) {
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log_error(r->conf.errh, __FILE__, __LINE__, "insert failed");
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}
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}
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# endif
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}
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return HANDLER_GO_ON;
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}
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#if defined(HAVE_GDBM_H)
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static void mod_trigger_b4_dl_trigger_gdbm(GDBM_FILE db, const unix_time64_t cur_ts, const int trigger_timeout) {
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datum key, val, okey;
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okey.dptr = NULL;
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/* according to the manual this loop + delete does delete all entries on its way
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*
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* we don't care as the next round will remove them. We don't have to perfect here.
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*/
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for (key = gdbm_firstkey(db); key.dptr; key = gdbm_nextkey(db, okey)) {
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unix_time64_t last_hit = 0;
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if (okey.dptr) {
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free(okey.dptr);
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okey.dptr = NULL;
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}
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val = gdbm_fetch(db, key);
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if (val.dsize == sizeof(last_hit))
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memcpy(&last_hit, val.dptr, val.dsize);
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else if (val.dsize == 4) {
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int32_t t;
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memcpy(&t, val.dptr, val.dsize);
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last_hit = t;
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}
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free(val.dptr);
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if (cur_ts - last_hit > trigger_timeout) {
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gdbm_delete(db, key);
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}
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okey = key;
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}
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if (okey.dptr) free(okey.dptr);
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/* reorg once a day */
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if ((cur_ts % (60 * 60 * 24) == 0)) gdbm_reorganize(db);
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}
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TRIGGER_FUNC(mod_trigger_b4_dl_handle_trigger) {
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/* check DB each minute */
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const unix_time64_t cur_ts = log_epoch_secs;
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if (cur_ts % 60 != 0) return HANDLER_GO_ON;
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UNUSED(srv);
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plugin_data * const p = p_d;
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/* (init i to 0 if global context; to 1 to skip empty global context) */
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for (int i = !p->cvlist[0].v.u2[1]; i < p->nconfig; ++i) {
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config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0];
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void *db = NULL;
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int timeout = (int)p->defaults.trigger_timeout;
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for (; -1 != cpv->k_id; ++cpv) {
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switch (cpv->k_id) {
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