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parser.c
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/**
* parser.c -- web log parsing
* Copyright (C) 2009-2014 by Gerardo Orellana <[email protected]>
* GoAccess - An Ncurses apache weblog analyzer & interactive viewer
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* A copy of the GNU General Public License is attached to this
* source distribution for its full text.
*
* Visit http://goaccess.prosoftcorp.com for new releases.
*/
/*
* "_XOPEN_SOURCE" is required for the GNU libc to export "strptime(3)"
* correctly.
*/
#define _LARGEFILE_SOURCE
#define _LARGEFILE64_SOURCE
#define _FILE_OFFSET_BITS 64
#define _XOPEN_SOURCE 700
#include <ctype.h>
#include <errno.h>
#if HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_NCURSESW_NCURSES_H
#include <ncursesw/ncurses.h>
#elif HAVE_NCURSES_NCURSES_H
#include <ncurses/ncurses.h>
#elif HAVE_NCURSES_H
#include <ncurses.h>
#elif HAVE_CURSES_H
#include <curses.h>
#endif
#include <arpa/inet.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#ifdef HAVE_LIBTOKYOCABINET
#include "tcabdb.h"
#include "tcbtdb.h"
#else
#include "glibht.h"
#endif
#ifdef HAVE_LIBGEOIP
#include "geolocation.h"
#endif
#include "parser.h"
#include "browsers.h"
#include "goaccess.h"
#include "error.h"
#include "opesys.h"
#include "util.h"
#include "xmalloc.h"
/* private prototypes */
/* key/data generators for each module */
static int gen_visitor_key (GKeyData * kdata, GLogItem * glog);
static int gen_404_key (GKeyData * kdata, GLogItem * glog);
static int gen_browser_key (GKeyData * kdata, GLogItem * glog);
static int gen_host_key (GKeyData * kdata, GLogItem * glog);
static int gen_keyphrase_key (GKeyData * kdata, GLogItem * glog);
static int gen_os_key (GKeyData * kdata, GLogItem * glog);
static int gen_referer_key (GKeyData * kdata, GLogItem * glog);
static int gen_ref_site_key (GKeyData * kdata, GLogItem * glog);
static int gen_request_key (GKeyData * kdata, GLogItem * glog);
static int gen_static_request_key (GKeyData * kdata, GLogItem * glog);
static int gen_status_code_key (GKeyData * kdata, GLogItem * glog);
static int gen_visit_time_key (GKeyData * kdata, GLogItem * glog);
#ifdef HAVE_LIBGEOIP
static int gen_geolocation_key (GKeyData * kdata, GLogItem * glog);
#endif
/* insertion routines */
static void insert_data (int data_nkey, const char *data, GModule module);
static void insert_root (int root_nkey, const char *root, GModule module);
/* insertion metric routines */
static void insert_hit (int data_nkey, int uniq_nkey, int root_nkey,
GModule module);
static void insert_visitor (int uniq_nkey, GModule module);
static void insert_bw (int data_nkey, uint64_t size, GModule module);
static void insert_time_served (int data_nkey, uint64_t ts, GModule module);
static void insert_method (int data_nkey, const char *method, GModule module);
static void insert_protocol (int data_nkey, const char *proto, GModule module);
static void insert_agent (int data_nkey, int agent_nkey, GModule module);
/* *INDENT-OFF* */
static GParse paneling[] = {
{
VISITORS,
gen_visitor_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
NULL,
NULL,
NULL,
}, {
REQUESTS,
gen_request_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
insert_method,
insert_protocol,
NULL,
}, {
REQUESTS_STATIC,
gen_static_request_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
insert_method,
insert_protocol,
NULL,
}, {
NOT_FOUND,
gen_404_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
insert_method,
insert_protocol,
NULL,
}, {
HOSTS,
gen_host_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
NULL,
NULL,
insert_agent,
}, {
OS,
gen_os_key,
insert_data,
insert_root,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
insert_method,
insert_protocol,
NULL,
}, {
BROWSERS,
gen_browser_key,
insert_data,
insert_root,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
NULL,
NULL,
NULL,
}, {
REFERRERS,
gen_referer_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
NULL,
NULL,
NULL,
}, {
REFERRING_SITES,
gen_ref_site_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
NULL,
NULL,
NULL,
}, {
KEYPHRASES,
gen_keyphrase_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
NULL,
NULL,
NULL,
},
#ifdef HAVE_LIBGEOIP
{
GEO_LOCATION,
gen_geolocation_key,
insert_data,
insert_root,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
NULL,
NULL,
NULL,
},
#endif
{
STATUS_CODES,
gen_status_code_key,
insert_data,
insert_root,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
NULL,
NULL,
NULL,
}, {
VISIT_TIMES,
gen_visit_time_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_time_served,
NULL,
NULL,
NULL,
},
};
/* *INDENT-ON* */
static void
new_modulekey (GKeyData * kdata)
{
GKeyData key = {
.data = NULL,
.data_key = NULL,
.data_nkey = 0,
.root = NULL,
.root_key = NULL,
.root_nkey = 0,
.uniq_key = NULL,
.uniq_nkey = 0,
};
*kdata = key;
}
static GParse *
panel_lookup (GModule module)
{
int i, num_panels = ARRAY_SIZE (paneling);
for (i = 0; i < num_panels; i++) {
if (paneling[i].module == module)
return &paneling[i];
}
return NULL;
}
/* allocate memory for ht raw data */
GRawData *
new_grawdata (void)
{
GRawData *raw_data = xmalloc (sizeof (GRawData));
memset (raw_data, 0, sizeof *raw_data);
return raw_data;
}
/* allocate memory for raw data items */
GRawDataItem *
new_grawdata_item (unsigned int size)
{
GRawDataItem *item = xcalloc (size, sizeof (GRawDataItem));
return item;
}
/* free memory allocated in raw data */
void
free_raw_data (GRawData * raw_data)
{
#ifdef HAVE_LIBTOKYOCABINET
int i;
for (i = 0; i < raw_data->size; i++) {
if (raw_data->items[i].key != NULL)
free (raw_data->items[i].key);
if (raw_data->items[i].value != NULL)
free (raw_data->items[i].value);
}
#endif
free (raw_data->items);
free (raw_data);
}
void
reset_struct (GLog * logger)
{
logger->invalid = 0;
logger->process = 0;
logger->resp_size = 0LL;
}
GLog *
init_log (void)
{
GLog *glog = xmalloc (sizeof (GLog));
memset (glog, 0, sizeof *glog);
return glog;
}
GLogItem *
init_log_item (GLog * logger)
{
GLogItem *glog;
logger->items = xmalloc (sizeof (GLogItem));
glog = logger->items;
memset (glog, 0, sizeof *glog);
glog->agent = NULL;
glog->browser = NULL;
glog->browser_type = NULL;
glog->continent = NULL;
glog->country = NULL;
glog->date = NULL;
glog->host = NULL;
glog->keyphrase = NULL;
glog->method = NULL;
glog->os = NULL;
glog->os_type = NULL;
glog->protocol = NULL;
glog->ref = NULL;
glog->req_key = NULL;
glog->req = NULL;
glog->status = NULL;
glog->time = NULL;
glog->uniq_key = NULL;
glog->resp_size = 0LL;
glog->serve_time = 0;
strncpy (glog->site, "", REF_SITE_LEN);
glog->site[REF_SITE_LEN - 1] = '\0';
return glog;
}
static void
free_logger (GLogItem * glog)
{
if (glog->agent != NULL)
free (glog->agent);
if (glog->browser != NULL)
free (glog->browser);
if (glog->browser_type != NULL)
free (glog->browser_type);
if (glog->continent != NULL)
free (glog->continent);
if (glog->country != NULL)
free (glog->country);
if (glog->date != NULL)
free (glog->date);
if (glog->host != NULL)
free (glog->host);
if (glog->keyphrase != NULL)
free (glog->keyphrase);
if (glog->method != NULL)
free (glog->method);
if (glog->os != NULL)
free (glog->os);
if (glog->os_type != NULL)
free (glog->os_type);
if (glog->protocol != NULL)
free (glog->protocol);
if (glog->ref != NULL)
free (glog->ref);
if (glog->req_key != NULL)
free (glog->req_key);
if (glog->req != NULL)
free (glog->req);
if (glog->status != NULL)
free (glog->status);
if (glog->time != NULL)
free (glog->time);
if (glog->uniq_key != NULL)
free (glog->uniq_key);
free (glog);
}
#define B16210(x) (((x) >= '0' && (x) <= '9') ? ((x) - '0') : (toupper((x)) - 'A' + 10))
static void
decode_hex (char *url, char *out)
{
char *ptr;
const char *c;
for (c = url, ptr = out; *c; c++) {
if (*c != '%' || !isxdigit (c[1]) || !isxdigit (c[2])) {
*ptr++ = *c;
} else {
*ptr++ = (B16210 (c[1]) * 16) + (B16210 (c[2]));
c += 2;
}
}
*ptr = 0;
}
static char *
decode_url (char *url)
{
char *out, *decoded;
if ((url == NULL) || (*url == '\0'))
return NULL;
out = decoded = xstrdup (url);
decode_hex (url, out);
if (conf.double_decode)
decode_hex (decoded, out);
strip_newlines (out);
return trim_str (out);
}
/* Process keyphrases from Google search, cache, and translate.
* Note that the referer hasn't been decoded at the entry point
* since there could be '&' within the search query. */
static int
extract_keyphrase (char *ref, char **keyphrase)
{
char *r, *ptr, *pch, *referer;
int encoded = 0;
if (!(strstr (ref, "http://www.google.")) &&
!(strstr (ref, "http://webcache.googleusercontent.com/")) &&
!(strstr (ref, "http://translate.googleusercontent.com/")))
return 1;
/* webcache.googleusercontent */
if ((r = strstr (ref, "/+&")) != NULL)
return 1;
/* webcache.googleusercontent */
else if ((r = strstr (ref, "/+")) != NULL)
r += 2;
/* webcache.googleusercontent */
else if ((r = strstr (ref, "q=cache:")) != NULL) {
pch = strchr (r, '+');
if (pch)
r += pch - r + 1;
}
/* www.google.* or translate.googleusercontent */
else if ((r = strstr (ref, "&q=")) != NULL ||
(r = strstr (ref, "?q=")) != NULL)
r += 3;
else if ((r = strstr (ref, "%26q%3D")) != NULL ||
(r = strstr (ref, "%3Fq%3D")) != NULL)
encoded = 1, r += 7;
else
return 1;
if (!encoded && (ptr = strchr (r, '&')) != NULL)
*ptr = '\0';
else if (encoded && (ptr = strstr (r, "%26")) != NULL)
*ptr = '\0';
referer = decode_url (r);
if (referer == NULL || *referer == '\0')
return 1;
referer = char_replace (referer, '+', ' ');
*keyphrase = trim_str (referer);
return 0;
}
#ifdef HAVE_LIBGEOIP
static int
extract_geolocation (GLogItem * glog, char *continent, char *country)
{
if (geo_location_data == NULL)
return 1;
geoip_get_country (glog->host, country, glog->type_ip);
geoip_get_continent (glog->host, continent, glog->type_ip);
return 0;
}
#endif
/* parses a URI and extracts the *host* part from it
* i.e., //www.example.com/path?googleguy > www.example.com */
static int
extract_referer_site (const char *referer, char *host)
{
char *url, *begin, *end;
int len = 0;
if ((referer == NULL) || (*referer == '\0'))
return 1;
url = strdup (referer);
if ((begin = strstr (url, "//")) == NULL)
goto clean;
begin += 2;
if ((len = strlen (begin)) == 0)
goto clean;
if ((end = strchr (begin, '/')) != NULL)
len = end - begin;
if (len == 0)
goto clean;
if (len >= REF_SITE_LEN)
len = REF_SITE_LEN - 1;
memcpy (host, begin, len);
host[len] = '\0';
free (url);
return 0;
clean:
free (url);
return 1;
}
/* returns 1 if the request seems to be a static file */
static int
verify_static_content (char *req)
{
char *nul = req + strlen (req), *ext = NULL;
int elen = 0, i;
if (strlen (req) < conf.static_file_max_len)
return 0;
for (i = 0; i < conf.static_file_idx; ++i) {
ext = conf.static_files[i];
if (ext == NULL || *ext == '\0')
continue;
elen = strlen (ext);
if (!memcmp (nul - elen, ext, elen))
return 1;
}
return 0;
}
static const char *
extract_method (const char *token)
{
const char *lookfor = NULL;
if ((lookfor = "OPTIONS", !memcmp (token, lookfor, 7)) ||
(lookfor = "GET", !memcmp (token, lookfor, 3)) ||
(lookfor = "HEAD", !memcmp (token, lookfor, 4)) ||
(lookfor = "POST", !memcmp (token, lookfor, 4)) ||
(lookfor = "PUT", !memcmp (token, lookfor, 3)) ||
(lookfor = "DELETE", !memcmp (token, lookfor, 6)) ||
(lookfor = "TRACE", !memcmp (token, lookfor, 5)) ||
(lookfor = "CONNECT", !memcmp (token, lookfor, 7)) ||
(lookfor = "PATCH", !memcmp (token, lookfor, 5)) ||
(lookfor = "options", !memcmp (token, lookfor, 7)) ||
(lookfor = "get", !memcmp (token, lookfor, 3)) ||
(lookfor = "head", !memcmp (token, lookfor, 4)) ||
(lookfor = "post", !memcmp (token, lookfor, 4)) ||
(lookfor = "put", !memcmp (token, lookfor, 3)) ||
(lookfor = "delete", !memcmp (token, lookfor, 6)) ||
(lookfor = "trace", !memcmp (token, lookfor, 5)) ||
(lookfor = "connect", !memcmp (token, lookfor, 7)) ||
(lookfor = "patch", !memcmp (token, lookfor, 5)))
return lookfor;
return NULL;
}
static int
invalid_protocol (const char *token)
{
const char *lookfor = NULL;
return !((lookfor = "HTTP/1.0", !memcmp (token, lookfor, 8)) ||
(lookfor = "HTTP/1.1", !memcmp (token, lookfor, 8)));
}
static char *
parse_req (char *line, char **method, char **protocol)
{
char *req = NULL, *request = NULL, *proto = NULL, *dreq = NULL;
const char *meth;
ptrdiff_t rlen;
meth = extract_method (line);
/* couldn't find a method, so use the whole request line */
if (meth == NULL) {
request = xstrdup (line);
}
/* method found, attempt to parse request */
else {
req = line + strlen (meth);
if ((proto = strstr (line, " HTTP/1.0")) == NULL &&
(proto = strstr (line, " HTTP/1.1")) == NULL) {
return alloc_string ("-");
}
req++;
if ((rlen = proto - req) <= 0)
return alloc_string ("-");
request = xmalloc (rlen + 1);
strncpy (request, req, rlen);
request[rlen] = 0;
if (conf.append_method)
(*method) = strtoupper (xstrdup (meth));
if (conf.append_protocol)
(*protocol) = strtoupper (xstrdup (++proto));
}
if ((dreq = decode_url (request)) && dreq != '\0') {
free (request);
return dreq;
}
return request;
}
static char *
parse_string (char **str, char end, int cnt)
{
int idx = 0;
char *pch = *str, *p;
do {
if (*pch == end)
idx++;
if ((*pch == end && cnt == idx) || *pch == '\0') {
size_t len = (pch - *str + 1);
p = xmalloc (len);
memcpy (p, *str, (len - 1));
p[len - 1] = '\0';
*str += len - 1;
return trim_str (p);
}
/* advance to the first unescaped delim */
if (*pch == '\\')
pch++;
} while (*pch++);
return NULL;
}
static int
parse_specifier (GLogItem * glog, char **str, const char *p)
{
struct tm tm;
const char *dfmt = conf.date_format;
const char *tfmt = conf.time_format;
char *pch, *sEnd, *bEnd, *tkn = NULL, *end = NULL;
double serve_secs = 0.0;
uint64_t bandw = 0, serve_time = 0;
errno = 0;
memset (&tm, 0, sizeof (tm));
switch (*p) {
/* date */
case 'd':
if (glog->date)
return 1;
/* parse date format including dates containing spaces,
* i.e., syslog date format (Jul 15 20:10:56) */
tkn = parse_string (&(*str), p[1], count_matches (dfmt, ' ') + 1);
if (tkn == NULL)
return 1;
end = strptime (tkn, dfmt, &tm);
if (end == NULL || *end != '\0') {
free (tkn);
return 1;
}
glog->date = tkn;
break;
/* time */
case 't':
if (glog->time)
return 1;
tkn = parse_string (&(*str), p[1], 1);
if (tkn == NULL)
return 1;
end = strptime (tkn, tfmt, &tm);
if (end == NULL || *end != '\0') {
free (tkn);
return 1;
}
glog->time = tkn;
break;
/* remote hostname (IP only) */
case 'h':
if (glog->host)
return 1;
tkn = parse_string (&(*str), p[1], 1);
if (tkn == NULL)
return 1;
if (invalid_ipaddr (tkn, &glog->type_ip)) {
free (tkn);
return 1;
}
glog->host = tkn;
break;
/* request method */
case 'm':
if (glog->method)
return 1;
tkn = parse_string (&(*str), p[1], 1);
if (tkn == NULL)
return 1;
if (!extract_method (tkn)) {
free (tkn);
return 1;
}
glog->method = tkn;
break;
/* request not including method or protocol */
case 'U':
if (glog->req)
return 1;
tkn = parse_string (&(*str), p[1], 1);
if (tkn == NULL || *tkn == '\0')
return 1;
if ((glog->req = decode_url (tkn)) == NULL)
return 1;
free (tkn);
break;
/* request protocol */
case 'H':
if (glog->protocol)
return 1;
tkn = parse_string (&(*str), p[1], 1);
if (tkn == NULL)
return 1;
if (invalid_protocol (tkn)) {
free (tkn);
return 1;
}
glog->protocol = tkn;
break;
/* request, including method + protocol */
case 'r':
if (glog->req)
return 1;
tkn = parse_string (&(*str), p[1], 1);
if (tkn == NULL)
return 1;
glog->req = parse_req (tkn, &glog->method, &glog->protocol);
free (tkn);
break;
/* Status Code */
case 's':
if (glog->status)
return 1;
tkn = parse_string (&(*str), p[1], 1);
if (tkn == NULL)
return 1;
strtol (tkn, &sEnd, 10);
if (tkn == sEnd || *sEnd != '\0' || errno == ERANGE) {
free (tkn);
return 1;
}
glog->status = tkn;
break;
/* size of response in bytes - excluding HTTP headers */
case 'b':
if (glog->resp_size)
return 1;
tkn = parse_string (&(*str), p[1], 1);
if (tkn == NULL)
return 1;
bandw = strtol (tkn, &bEnd, 10);
if (tkn == bEnd || *bEnd != '\0' || errno == ERANGE)
bandw = 0;
glog->resp_size = bandw;
conf.bandwidth = 1;
free (tkn);
break;
/* referrer */
case 'R':
if (glog->ref)
return 1;
tkn = parse_string (&(*str), p[1], 1);
if (tkn == NULL)
tkn = alloc_string ("-");
if (tkn != NULL && *tkn == '\0') {
free (tkn);
tkn = alloc_string ("-");
}
if (strcmp (tkn, "-") != 0) {
extract_keyphrase (tkn, &glog->keyphrase);
extract_referer_site (tkn, glog->site);
}
glog->ref = tkn;
break;
/* user agent */
case 'u':
if (glog->agent)
return 1;
tkn = parse_string (&(*str), p[1], 1);
if (tkn != NULL && *tkn != '\0') {
/* Make sure the user agent is decoded (i.e.: CloudFront)
* and replace all '+' with ' ' (i.e.: w3c) */
glog->agent = char_replace (decode_url (tkn), '+', ' ');
free (tkn);
break;
} else if (tkn != NULL && *tkn == '\0') {
free (tkn);
tkn = alloc_string ("-");
}
/* must be null */
else {
tkn = alloc_string ("-");
}
glog->agent = tkn;
break;
/* time taken to serve the request, in seconds */
case 'T':
/* ignore it if we already have served time */
if (glog->serve_time)
break;
tkn = parse_string (&(*str), p[1], 1);
if (tkn == NULL)
return 1;
if (strchr (tkn, '.') != NULL)
serve_secs = strtod (tkn, &bEnd);
else
serve_secs = strtoull (tkn, &bEnd, 10);
if (tkn == bEnd || *bEnd != '\0' || errno == ERANGE)
serve_secs = 0;
/* convert it to microseconds */
if (serve_secs > 0)
glog->serve_time = serve_secs * SECS;
else
glog->serve_time = 0;
conf.serve_usecs = 1;
free (tkn);
break;
/* time taken to serve the request, in microseconds */
case 'D':
/* ignore it if we already have served time */
if (glog->serve_time)
break;
tkn = parse_string (&(*str), p[1], 1);
if (tkn == NULL)
return 1;
serve_time = strtoull (tkn, &bEnd, 10);
if (tkn == bEnd || *bEnd != '\0' || errno == ERANGE)
serve_time = 0;
glog->serve_time = serve_time;
conf.serve_usecs = 1;
free (tkn);
break;
/* everything else skip it */
default:
if ((pch = strchr (*str, p[1])) != NULL)
*str += pch - *str;
}
return 0;
}
static int
parse_format (GLogItem * glog, char *str)
{
const char *p;
const char *lfmt = conf.log_format;
int special = 0;
if (str == NULL || *str == '\0')
return 1;
/* iterate over the log format */
for (p = lfmt; *p; p++) {
if (*p == '%') {
special++;
continue;
}
if (special && *p != '\0') {
if ((str == NULL) || (*str == '\0'))
return 0;
/* attempt to parse format specifiers */
if (parse_specifier (glog, &str, p) == 1)
return 1;
special = 0;
} else if (special && isspace (p[0])) {
return 1;
} else {
str++;
}
}
return 0;
}
static int
valid_line (char *line)
{
/* invalid line */
if ((line == NULL) || (*line == '\0'))
return 1;
/* ignore comments */
if (*line == '#' || *line == '\n')
return 1;
return 0;
}
static void
lock_spinner (void)
{
if (parsing_spinner != NULL && parsing_spinner->state == SPN_RUN)
pthread_mutex_lock (&parsing_spinner->mutex);
}
static void
unlock_spinner (void)
{
if (parsing_spinner != NULL && parsing_spinner->state == SPN_RUN)
pthread_mutex_unlock (&parsing_spinner->mutex);
}
static void
strip_qstring (char *req)
{
char *qmark;
if ((qmark = strchr (req, '?')) != NULL) {
if ((qmark - req) > 0)
*qmark = '\0';
}
}
static void
inc_resp_size (GLog * logger, uint64_t resp_size)
{
logger->resp_size += resp_size;
#ifdef TCB_BTREE
ht_inc_u64_from_str_key (ht_general_stats, "bandwidth", resp_size);
#endif
}
static void