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ngx_http_sml_module.c
431 lines (349 loc) · 11.1 KB
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ngx_http_sml_module.c
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/*
* ngx_http_sml_module.c
*
* Created on: 2013年12月18日
* Author: yw
*/
#include "ngx_http_sml_module.h"
static char *ngx_http_sml_sml_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static void *ngx_http_sml_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_sml_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child);
static char *ngx_sml_log_set(ngx_conf_t *cf, ngx_http_sml_log_conf_t *lgcf);
#if defined(nginx_version) && nginx_version >= 1005002
static ngx_log_t *ngx_log_create(ngx_cycle_t *cycle, ngx_str_t *name);
#endif
static u_char *ngx_http_sml_log_error(ngx_log_t *log, u_char *buf, size_t len);
static ngx_int_t ngx_http_sml_preinit(ngx_conf_t *cf);
static ngx_int_t ngx_http_sml_init(ngx_conf_t *cf);
static ngx_str_t err_levels[] = {
ngx_null_string,
ngx_string("emerg"),
ngx_string("alert"),
ngx_string("crit"),
ngx_string("error"),
ngx_string("warn"),
ngx_string("notice"),
ngx_string("info"),
ngx_string("debug")
};
static const char *debug_levels[] = {
"debug_core", "debug_alloc", "debug_mutex", "debug_event",
"debug_http", "debug_mail", "debug_mysql"
};
static ngx_http_sml_log_conf_t *default_log;
static ngx_command_t ngx_http_sml_commands[] = {
{ ngx_string("sml_log"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_1MORE,
ngx_http_sml_sml_log,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
ngx_null_command
};
static ngx_http_module_t ngx_http_sml_module_ctx = {
ngx_http_sml_preinit, /* preconfiguration */
ngx_http_sml_init, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_sml_create_loc_conf, /* create location configuration */
ngx_http_sml_merge_loc_conf /* merge location configuration */
};
ngx_module_t ngx_http_sml_module = {
NGX_MODULE_V1,
&ngx_http_sml_module_ctx, /* module context */
ngx_http_sml_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
static
ngx_int_t ngx_http_sml_preinit(ngx_conf_t *cf)
{
ngx_str_t name = ngx_string(DEFAULT_LOG);
ngx_log_t *log;
log = ngx_log_create(cf->cycle, &name);
if (log == NULL) {
return NGX_ERROR ;
}
log->log_level = DEFAULT_LEVEL;
log->handler = ngx_http_sml_log_error;
default_log = ngx_pcalloc(cf->pool, sizeof(ngx_http_sml_log_conf_t));
if (default_log == NULL) {
return NGX_ERROR;
}
/* set by pcalloc
default_log->log_tail = 0
*/
default_log->log = log;
return NGX_OK;
}
static
ngx_int_t ngx_http_sml_init(ngx_conf_t *cf)
{
if (ngx_http_lua_add_package_preload(cf, "sml",
ngx_http_sml_inject_api)
!= NGX_OK)
{
return NGX_ERROR;
}
return NGX_OK;
}
static char *
ngx_http_sml_sml_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_sml_loc_conf_t *slcf = conf;
ngx_http_sml_log_conf_t *lgcf = slcf->log_conf;
ngx_str_t *value, name;
if (lgcf) {
return "is duplicate";
}
lgcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sml_log_conf_t));
if (lgcf == NULL) {
return NGX_CONF_ERROR;
}
/* set by pcalloc
lgcf->log_tail = 0
*/
slcf->log_conf = lgcf;
value = cf->args->elts;
if (ngx_strcmp(value[1].data, "stderr") == 0) {
ngx_str_null(&name);
} else {
name = value[1];
}
lgcf->log = ngx_log_create(cf->cycle, &name);
if (lgcf->log == NULL) {
return NGX_CONF_ERROR;
}
return ngx_sml_log_set(cf, slcf->log_conf);
}
static void *
ngx_http_sml_create_loc_conf(ngx_conf_t *cf)
{
ngx_http_sml_loc_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sml_loc_conf_t));
if (conf == NULL) {
return NULL;
}
/*
* set by ngx_pcalloc():
*
* conf->log_conf = NULL;
*/
return conf;
}
static char *
ngx_http_sml_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_http_sml_loc_conf_t *prev = parent;
ngx_http_sml_loc_conf_t *conf = child;
if (conf->log_conf == NULL) {
if (prev->log_conf) {
conf->log_conf = prev->log_conf;
} else {
conf->log_conf = default_log;
}
}
return NGX_CONF_OK;
}
static char *
ngx_sml_log_set(ngx_conf_t *cf, ngx_http_sml_log_conf_t *lgcf)
{
ngx_uint_t i, n, d, found;
ngx_str_t *value;
ngx_log_t *log;
log = lgcf->log;
value = cf->args->elts;
log->handler = ngx_http_sml_log_error;
if (cf->args->nelts == 2) {
log->log_level = DEFAULT_LEVEL;
return NGX_CONF_OK;
}
i = 2;
if (ngx_strncmp(value[i].data, "tail=o", 6) == 0) {
if (ngx_strcmp(value[i].data + 6, "n") == 0) {
lgcf->log_tail = 1;
} else if (ngx_strcmp(value[i].data + 6, "ff") == 0) {
lgcf->log_tail = 0;
} else {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid tail flags \"%s\"",
&value[i].data + 5);
return NGX_CONF_ERROR;
}
i++;
}
for (; i < cf->args->nelts; i++) {
found = 0;
for (n = 1; n <= NGX_LOG_DEBUG; n++) {
if (ngx_strcmp(value[i].data, err_levels[n].data) == 0) {
if (log->log_level != 0) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"duplicate log level \"%V\"",
&value[i]);
return NGX_CONF_ERROR;
}
log->log_level = n;
found = 1;
break;
}
}
for (n = 0, d = NGX_LOG_DEBUG_FIRST; d <= NGX_LOG_DEBUG_LAST; d <<= 1) {
if (ngx_strcmp(value[i].data, debug_levels[n++]) == 0) {
if (log->log_level & ~NGX_LOG_DEBUG_ALL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid log level \"%V\"",
&value[i]);
return NGX_CONF_ERROR;
}
log->log_level |= d;
found = 1;
break;
}
}
if (!found) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid log level or option \"%V\"", &value[i]);
return NGX_CONF_ERROR;
}
}
if (log->log_level == NGX_LOG_DEBUG) {
log->log_level = NGX_LOG_DEBUG_ALL;
} else if(log->log_level == 0) {
log->log_level = DEFAULT_LEVEL;
}
return NGX_CONF_OK;
}
#if defined(nginx_version) && nginx_version >= 1005002
static ngx_log_t *
ngx_log_create(ngx_cycle_t *cycle, ngx_str_t *name)
{
ngx_log_t *log;
log = ngx_pcalloc(cycle->pool, sizeof(ngx_log_t));
if (log == NULL) {
return NULL;
}
log->file = ngx_conf_open_file(cycle, name);
if (log->file == NULL) {
return NULL;
}
return log;
}
#endif
static ngx_int_t
ngx_http_get_argument(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
ngx_str_t *name = (ngx_str_t *) data;
ngx_str_t value;
if (ngx_http_arg(r, name->data, name->len, &value) != NGX_OK) {
v->not_found = 1;
return NGX_OK;
}
v->data = value.data;
v->len = value.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
return NGX_OK;
}
static u_char *
ngx_http_sml_log_error(ngx_log_t *log, u_char *buf, size_t len)
{
u_char *p;
ngx_http_request_t *r;
ngx_http_log_ctx_t *ctx;
ngx_http_sml_loc_conf_t *slcf;
ngx_http_request_body_t *rb;
ngx_http_variable_value_t vv;
ngx_chain_t *tmp;
ngx_list_part_t *part;
ngx_table_elt_t *data;
ngx_uint_t i;
static ngx_str_t uri = ngx_string("debug_uri");
static ngx_str_t body = ngx_string("debug_body");
static ngx_str_t header = ngx_string("debug_header");
p = buf;
ctx = log->data;
if (!ctx) {
return p;
}
r = ctx->request;
if (!r) {
return p;
}
if (log->log_level == NGX_LOG_DEBUG_ALL) {
ngx_http_get_argument(r, &vv, (uintptr_t) &uri);
if (!vv.not_found) {
p = ngx_snprintf(buf, len, ", uri: %V", &r->request_line);
len -= p - buf;
buf = p;
}
ngx_http_get_argument(r, &vv, (uintptr_t) &body);
rb = r->request_body;
if (!vv.not_found && rb != NULL && rb->bufs != NULL) {
p = ngx_snprintf(buf, len, ", body: ");
len -= p - buf;
buf = p;
tmp = rb->bufs;
while (tmp != NULL) {
p = ngx_snprintf(buf, len, "%*s", tmp->buf->last - tmp->buf->pos, tmp->buf->pos);
len -= p - buf;
buf = p;
tmp = tmp->next;
}
}
ngx_http_get_argument(r, &vv, (uintptr_t) &header);
if (!vv.not_found) {
part = &r->headers_in.headers.part;
data = part->elts;
for (i = 0; /* void */; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
data = part->elts;
i = 0;
}
if (vv.len == 1 && vv.data[0] == '*') {
p = ngx_snprintf(buf, len, ", %V: %V", &data[i].key, &data[i].value);
len -= p - buf;
buf = p;
continue;
}
if (data[i].key.len != vv.len) {
continue;
}
if (ngx_strncmp(data[i].lowcase_key, vv.data, vv.len) == 0) {
p = ngx_snprintf(buf, len, ", %V: %V", &data[i].key, &data[i].value);
len -= p - buf;
buf = p;
break;
}
}
}
}
slcf = ngx_http_get_module_loc_conf(r, ngx_http_sml_module);
if (!slcf->log_conf->log_tail) {
return p;
}
if (log->action) {
p = ngx_snprintf(buf, len, " while %s", log->action);
len -= p - buf;
}
p = ngx_snprintf(buf, len, ", client: %V", &ctx->connection->addr_text);
len -= p - buf;
if (r->log_handler) {
return r->log_handler(r, ctx->current_request, p, len);
}
return p;
}