forked from tony2001/ngx_http_pinba_module
/
ngx_http_pinba_module.c
549 lines (443 loc) · 15.5 KB
/
ngx_http_pinba_module.c
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/*
* Copyright (C) Antony Dovgal
* loosely based on ngx_http_log_module by Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include "pinba.pb-c.h"
#define PINBA_STR_BUFFER_SIZE 257
ngx_str_t request_uri_name = ngx_string("pinba_request_uri");
ngx_str_t request_schema_name = ngx_string("pinba_request_schema");
ngx_int_t request_uri_key;
ngx_int_t request_schema_key;
typedef struct {
ngx_flag_t enable;
ngx_array_t *ignore_codes;
ngx_url_t server;
char *buffer;
size_t buffer_size;
size_t buffer_used_len;
struct {
int fd;
struct sockaddr_storage sockaddr;
int sockaddr_len;
} socket;
char hostname[PINBA_STR_BUFFER_SIZE];
Pinba__Request *request;
size_t request_size;
} ngx_http_pinba_loc_conf_t;
static void *ngx_http_pinba_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_pinba_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child);
static ngx_int_t ngx_http_pinba_init(ngx_conf_t *cf);
static char *ngx_http_pinba_ignore_codes(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static char *ngx_http_pinba_buffer_size(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static char *ngx_http_pinba_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
typedef struct {
ProtobufCBuffer base;
ngx_str_t str;
} ngx_pinba_buf_t;
static ngx_command_t ngx_http_pinba_commands[] = { /* {{{ */
{ ngx_string("pinba_enable"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
{ ngx_string("pinba_ignore_codes"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_1MORE,
ngx_http_pinba_ignore_codes,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
{ ngx_string("pinba_buffer_size"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_1MORE,
ngx_http_pinba_buffer_size,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
{ ngx_string("pinba_server"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE1,
ngx_http_pinba_server,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
ngx_null_command
};
/* }}} */
static ngx_http_module_t ngx_http_pinba_module_ctx = { /* {{{ */
NULL, /* preconfiguration */
ngx_http_pinba_init, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_pinba_create_loc_conf, /* create location configration */
ngx_http_pinba_merge_loc_conf /* merge location configration */
};
/* }}} */
ngx_module_t ngx_http_pinba_module = { /* {{{ */
NGX_MODULE_V1,
&ngx_http_pinba_module_ctx, /* module context */
ngx_http_pinba_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 char *ngx_http_pinba_ignore_codes(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) /* {{{ */
{
ngx_http_pinba_loc_conf_t *lcf = conf;
ngx_str_t *value;
ngx_uint_t i, *pcode;
ngx_int_t code;
value = cf->args->elts;
if (cf->args->nelts == 1 && ngx_strcmp(&value[1], "none") == 0) {
lcf->ignore_codes = NULL;
return NGX_OK;
}
if (lcf->ignore_codes == NULL) {
lcf->ignore_codes = ngx_array_create(cf->pool, 4, sizeof(ngx_uint_t));
if (lcf->ignore_codes == NULL) {
return NGX_CONF_ERROR;
}
}
for (i = 1; i < cf->args->nelts; i++) {
char *dash;
dash = ngx_strchr(value[i].data, '-');
if (dash) {
/* a range of values */
u_char *data_copy, *dash_copy;
int code1_len, code2_len, n;
ngx_int_t code1, code2;
code1_len = (dash - (char *)value[i].data);
code2_len = value[i].len - code1_len;
if (code1_len < 3 || code2_len < 3) {
ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "invalid status code value \"%V\"", &value[i]);
return NGX_CONF_ERROR;
}
data_copy = ngx_pstrdup(cf->pool, &value[i]);
dash_copy = data_copy + code1_len;
*dash_copy = '\0';
code1 = ngx_atoi(data_copy, code1_len);
if (code1 < 100 || code1 > 599) {
ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "invalid status code value \"%V\", values must not be less than 100 or greater than 599", &value[i]);
return NGX_CONF_ERROR;
}
code2 = ngx_atoi(dash_copy + 1, code2_len - 1);
if (code2 < 100 || code2 > 599) {
ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "invalid status code value \"%V\", values must not be less than 100 or greater than 599", &value[i]);
return NGX_CONF_ERROR;
}
if (code1 >= code2) {
ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "invalid status code value \"%V\", range end must be greater than range start", &value[i]);
return NGX_CONF_ERROR;
}
for (n = code1; n <= code2; n++) {
pcode = ngx_array_push(lcf->ignore_codes);
if (pcode == NULL) {
return NGX_CONF_ERROR;
}
*pcode = (ngx_uint_t)n;
}
} else {
/* just a simple value */
code = ngx_atoi(value[i].data, value[i].len);
if (code < 100 || code > 599) {
ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "invalid status code value \"%V\"", &value[i]);
return NGX_CONF_ERROR;
}
pcode = ngx_array_push(lcf->ignore_codes);
if (pcode == NULL) {
return NGX_CONF_ERROR;
}
*pcode = (ngx_uint_t)code;
}
}
return NGX_CONF_OK;
}
/* }}} */
static char *ngx_http_pinba_buffer_size(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) /* {{{ */
{
ngx_http_pinba_loc_conf_t *lcf = conf;
ngx_str_t *value;
size_t size;
value = cf->args->elts;
size = ngx_parse_size(&value[1]);
if (size == (size_t) NGX_ERROR) {
ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "invalid buffer size \"%V\" (only values from 0 to 65507 are accepted)", &value[1]);
return NGX_CONF_ERROR;
}
if (size > 65507) {
ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "buffer size value \"%V\" is too big (only values from 0 to 65507 are accepted)", &value[1]);
return NGX_CONF_ERROR;
}
lcf->buffer_size = size;
return NGX_CONF_OK;
}
/* }}} */
static char *ngx_http_pinba_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) /* {{{ */
{
ngx_str_t *value;
ngx_url_t u;
ngx_http_pinba_loc_conf_t *lcf = conf;
struct addrinfo *ai_list, *ai_ptr, ai_hints;
int fd, status;
value = cf->args->elts;
ngx_memzero(&u, sizeof(ngx_url_t));
u.url = value[1];
u.no_resolve = 0;
if (ngx_parse_url(cf->pool, &u) != NGX_OK) {
if (u.err) {
ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "%s in pinba server \"%V\"", u.err, &u.url);
}
return NGX_CONF_ERROR;
}
if (u.no_port) {
ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "no port in pinba server \"%V\"", &u.url);
return NGX_CONF_ERROR;
}
lcf->socket.fd = -1;
lcf->server = u;
if (lcf->server.host.len > 0 && lcf->server.host.data != NULL) {
lcf->server.host.data[lcf->server.host.len] = '\0';
}
memset(&ai_hints, 0, sizeof(ai_hints));
ai_hints.ai_flags = 0;
#ifdef AI_ADDRCONFIG
ai_hints.ai_flags |= AI_ADDRCONFIG;
#endif
ai_hints.ai_family = AF_UNSPEC;
ai_hints.ai_socktype = SOCK_DGRAM;
ai_hints.ai_addr = NULL;
ai_hints.ai_canonname = NULL;
ai_hints.ai_next = NULL;
ai_list = NULL;
status = getaddrinfo((char *)lcf->server.host.data, (char *)lcf->server.port_text.data, &ai_hints, &ai_list);
if (status != 0) {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0, "pinba module: getaddrinfo(\"%V\") failed: %s", &lcf->server.url, gai_strerror(status));
return NGX_CONF_ERROR;
}
fd = -1;
for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) {
fd = socket(ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
if (fd >= 0) {
lcf->socket.fd = fd;
memcpy(&lcf->socket.sockaddr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
lcf->socket.sockaddr_len = ai_ptr->ai_addrlen;
break;
}
}
freeaddrinfo(ai_list);
if (fd < 0) {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0, "pinba module: socket() failed: %s", strerror(errno));
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
/* }}} */
static int ngx_http_pinba_send_data(ngx_http_pinba_loc_conf_t *lcf, ngx_http_request_t *r, Pinba__Request *request, size_t packed_size) /* {{{ */
{
uint8_t *buf;
int res;
if (packed_size == 0) {
packed_size = pinba__request__get_packed_size(request);
}
buf = ngx_pcalloc(r->pool, packed_size);
pinba__request__pack(request, buf);
res = sendto(lcf->socket.fd, buf, packed_size, 0,
(struct sockaddr *) &lcf->socket.sockaddr, lcf->socket.sockaddr_len);
ngx_pfree(r->pool, buf);
return res;
}
/* }}} */
static int ngx_http_pinba_push_into_buffer(ngx_http_pinba_loc_conf_t *lcf, ngx_http_request_t *r, Pinba__Request *request, int packed_size) /* {{{ */
{
if (lcf->buffer_size != NGX_CONF_UNSET_SIZE && lcf->buffer_size > 0) {
if (lcf->request == NULL) {
lcf->request = request;
} else if ((lcf->request_size + packed_size) > lcf->buffer_size) {
ngx_http_pinba_send_data(lcf, r, lcf->request, 0);
pinba__request__free_unpacked(lcf->request, NULL);
lcf->request = request;
} else {
lcf->request->requests = realloc(lcf->request->requests, sizeof(Pinba__Request *) * (lcf->request->n_requests + 1));
if (lcf->request->requests) {
lcf->request->requests[lcf->request->n_requests] = request;
lcf->request->n_requests++;
lcf->request_size += packed_size;
}
}
return 0;
}
return -1;
}
/* }}} */
ngx_int_t ngx_http_pinba_handler(ngx_http_request_t *r) /* {{{ */
{
ngx_http_pinba_loc_conf_t *lcf;
ngx_uint_t status, i, *pcode;
ngx_http_variable_value_t *request_uri;
ngx_http_variable_value_t *request_schema;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http pinba handler");
lcf = ngx_http_get_module_loc_conf(r, ngx_http_pinba_module);
/* bail out right away if disabled */
if (lcf->enable == 0) {
return NGX_OK;
}
status = 0;
if (r->err_status) {
status = r->err_status;
} else if (r->headers_out.status) {
status = r->headers_out.status;
}
/* first check if the status is ignored */
if (status > 0 && lcf->ignore_codes) {
pcode = lcf->ignore_codes->elts;
for (i = 0; i < lcf->ignore_codes->nelts; i++) {
if (status == pcode[i]) {
/* this status is ignored, so just get outta here */
return NGX_OK;
}
}
}
if (lcf->socket.fd < 0) {
/* no socket -> no data */
return NGX_OK; /* doesn't matter, the return status is ignored anyway */
}
/* ok, we may proceed then.. */
{
char hostname[PINBA_STR_BUFFER_SIZE] = {0}, server_name[PINBA_STR_BUFFER_SIZE] = {0}, script_name[PINBA_STR_BUFFER_SIZE] = {0};
ngx_time_t *tp;
ngx_msec_int_t ms;
size_t packed_size;
Pinba__Request *request;
request = malloc(sizeof(Pinba__Request));
pinba__request__init(request);
if (lcf->hostname[0] == '\0') {
if (gethostname(hostname, sizeof(hostname)) == 0) {
memcpy(lcf->hostname, hostname, PINBA_STR_BUFFER_SIZE);
} else {
memcpy(lcf->hostname, "unknown", sizeof("unknown"));
}
}
/* hostname */
request->hostname = strdup(lcf->hostname);
memcpy(server_name, r->headers_in.server.data, (r->headers_in.server.len > PINBA_STR_BUFFER_SIZE) ? PINBA_STR_BUFFER_SIZE : r->headers_in.server.len);
request->server_name = strdup(server_name);
request_uri = ngx_http_get_variable(r, &request_uri_name, request_uri_key);
if (request_uri && !request_uri->not_found && request_uri->len > 0) {
/* try variable first */
memcpy(script_name, request_uri->data, (request_uri->len > PINBA_STR_BUFFER_SIZE) ? PINBA_STR_BUFFER_SIZE : request_uri->len);
} else {
u_char *q = NULL;
int uri_len = r->unparsed_uri.len;
/* default script_name is $request_uri with GET parameters cut off */
if (r->unparsed_uri.data && r->unparsed_uri.len) {
q = (u_char *)ngx_strchr(r->unparsed_uri.data, '?');
if (q) {
uri_len = q - r->unparsed_uri.data;
}
}
memcpy(script_name, r->unparsed_uri.data, (uri_len > PINBA_STR_BUFFER_SIZE) ? PINBA_STR_BUFFER_SIZE : uri_len);
}
request->script_name = strdup(script_name);
request_schema = ngx_http_get_variable(r, &request_schema_name, request_schema_key);
if (request_schema && !request_schema->not_found && request_schema->len) {
request->schema = malloc(request_schema->len + 1);
if (request->schema) {
memcpy(request->schema, request_schema->data, request_schema->len);
request->schema[request_schema->len] = '\0';
}
} else {
#if (NGX_HTTP_SSL)
if (r->connection->ssl)
request->schema = strdup("https");
else
#endif
request->schema = strdup("http");
}
request->document_size = r->connection->sent;
tp = ngx_timeofday();
ms = (ngx_msec_int_t) ((tp->sec - r->start_sec) * 1000 + (tp->msec - r->start_msec));
ms = (ms >= 0) ? ms : 0;
request->request_time = (float)ms/1000;
request->status = r->headers_out.status;
request->has_status = 1;
/* just nullify other fields for now */
request->request_count = 0;
request->memory_peak = 0;
request->ru_utime = 0;
request->ru_stime = 0;
packed_size = pinba__request__get_packed_size(request);
if (ngx_http_pinba_push_into_buffer(lcf, r, request, packed_size) < 0) {
ngx_http_pinba_send_data(lcf, r, request, packed_size);
pinba__request__free_unpacked(request, NULL);
}
}
return NGX_OK;
}
/* }}} */
static void *ngx_http_pinba_create_loc_conf(ngx_conf_t *cf) /* {{{ */
{
ngx_http_pinba_loc_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_pinba_loc_conf_t));
if (conf == NULL) {
return NULL;
}
conf->enable = NGX_CONF_UNSET;
conf->ignore_codes = NULL;
conf->socket.fd = -1;
conf->buffer_size = NGX_CONF_UNSET_SIZE;
return conf;
}
/* }}} */
static char *ngx_http_pinba_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) /* {{{ */
{
ngx_http_pinba_loc_conf_t *prev = parent;
ngx_http_pinba_loc_conf_t *conf = child;
ngx_conf_merge_value(conf->enable, prev->enable, 0);
if (conf->ignore_codes == NULL) {
conf->ignore_codes = prev->ignore_codes;
}
if (conf->server.host.data == NULL && conf->server.port_text.data == NULL) {
conf->server = prev->server;
}
if (conf->socket.fd == -1) {
conf->socket = prev->socket;
}
if (conf->buffer_size == NGX_CONF_UNSET_SIZE) {
conf->buffer_size = prev->buffer_size;
conf->buffer_used_len = 0;
conf->buffer = NULL;
}
if (conf->hostname[0] == '\0' && prev->hostname[0] != '\0') {
memcpy(conf->hostname, prev->hostname, sizeof(prev->hostname));
}
return NGX_CONF_OK;
}
/* }}} */
static ngx_int_t ngx_http_pinba_init(ngx_conf_t *cf) /* {{{ */
{
ngx_http_handler_pt *h;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
h = ngx_array_push(&cmcf->phases[NGX_HTTP_LOG_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_http_pinba_handler;
request_uri_key = ngx_hash_key_lc(request_uri_name.data, request_uri_name.len);
request_schema_key = ngx_hash_key_lc(request_schema_name.data, request_schema_name.len);
return NGX_OK;
}
/* }}} */
/*
* vim600: sw=4 ts=4 fdm=marker
*/