如何自定义freeswitch-cdr
关于cdr，只要涉及freeswitch，都关心cdr存储和处理。
如果现有的cdr你自己不满意，如何自定义呢？
我们参考freeswitch mod_json_cdr 来看看源码如何实现的。
源码只有几百行，特别适合初学者学习。
/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2005-2014, Anthony Minessale II <anthm@freeswitch.org>
*
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
*
* The Initial Developer of the Original Code is
* Anthony Minessale II <anthm@freeswitch.org>
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Brian West <brian@freeswitch.org>
* Bret McDanel <trixter AT 0xdecafbad.com>
* Justin Cassidy <xachenant@hotmail.com>
*
* mod_json_cdr.c -- JSON CDR Module to files or curl
*
*/
#include <switch.h>
#include <sys/stat.h>
#include <switch_curl.h>
#define MAX_URLS 20
#define MAX_ERR_DIRS 20
#define ENCODING_NONE 0
#define ENCODING_DEFAULT 1
#define ENCODING_BASE64 2
static struct {
char *cred;
char *urls[MAX_URLS];
int url_count;
int url_index;
switch_thread_rwlock_t *log_path_lock;
char *base_log_dir;
char *base_err_log_dir[MAX_ERR_DIRS];
char *log_dir;
char *err_log_dir[MAX_ERR_DIRS];
int err_dir_count;
uint32_t delay;
uint32_t retries;
uint32_t shutdown;
uint32_t enable_cacert_check;
char *ssl_cert_file;
char *ssl_key_file;
char *ssl_key_password;
char *ssl_version;
char *ssl_cacert_file;
uint32_t enable_ssl_verifyhost;
int encode;
int log_http_and_disk;
switch_bool_t log_errors_to_disk;
int log_b;
int prefix_a;
int disable100continue;
int rotate;
long auth_scheme;
switch_memory_pool_t *pool;
switch_event_node_t *node;
int encode_values;
switch_queue_t *queue;
switch_thread_t *thread;
} globals;
typedef struct {
char *json_text;
char *json_text_escaped;
char *logdir;
char *uuid;
char *filename;
} cdr_data_t;
SWITCH_MODULE_LOAD_FUNCTION(mod_json_cdr_load);
SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_json_cdr_shutdown);
SWITCH_MODULE_DEFINITION(mod_json_cdr, mod_json_cdr_load, mod_json_cdr_shutdown, NULL);
/* this function would have access to the HTML returned by the webserver, we don't need it
* and the default curl activity is to print to stdout, something not as desirable
* so we have a dummy function here
*/
static size_t httpCallBack(char *buffer, size_t size, size_t nitems, void *outstream)
{
return size * nitems;
}
static switch_status_t set_json_cdr_log_dirs()
{
switch_time_exp_t tm;
char *path = NULL;
char date[80] = "";
switch_size_t retsize;
switch_status_t status = SWITCH_STATUS_SUCCESS, dir_status;
int err_dir_index;
switch_time_exp_lt(&tm, switch_micro_time_now());
switch_strftime_nocheck(date, &retsize, sizeof(date), "%Y-%m-%d-%H-%M-%S", &tm);
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Rotating log file paths\n");
if (!zstr(globals.base_log_dir)) {
if (globals.rotate) {
if ((path = switch_mprintf("%s%s%s", globals.base_log_dir, SWITCH_PATH_SEPARATOR, date))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Rotating log file path to %s\n", path);
dir_status = SWITCH_STATUS_SUCCESS;
if (switch_directory_exists(path, globals.pool) != SWITCH_STATUS_SUCCESS) {
dir_status = switch_dir_make(path, SWITCH_FPROT_OS_DEFAULT, globals.pool);
}
if (dir_status == SWITCH_STATUS_SUCCESS) {
switch_thread_rwlock_wrlock(globals.log_path_lock);
switch_safe_free(globals.log_dir);
globals.log_dir = path;
switch_thread_rwlock_unlock(globals.log_path_lock);
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to create new mod_json_cdr log_dir path\n");
switch_safe_free(path);
status = SWITCH_STATUS_FALSE;
}
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to generate new mod_json_cdr log_dir path\n");
status = SWITCH_STATUS_FALSE;
}
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Setting log file path to %s\n", globals.base_log_dir);
if ((path = switch_safe_strdup(globals.base_log_dir))) {
switch_thread_rwlock_wrlock(globals.log_path_lock);
switch_safe_free(globals.log_dir);
switch_dir_make_recursive(path, SWITCH_DEFAULT_DIR_PERMS, globals.pool);
globals.log_dir = path;
switch_thread_rwlock_unlock(globals.log_path_lock);
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to set log_dir path\n");
status = SWITCH_STATUS_FALSE;
}
}
}
for (err_dir_index = 0; err_dir_index < globals.err_dir_count; err_dir_index++) {
if (globals.rotate) {
if ((path = switch_mprintf("%s%s%s", globals.base_err_log_dir[err_dir_index], SWITCH_PATH_SEPARATOR, date))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Rotating err log file path to %s\n", path);
dir_status = SWITCH_STATUS_SUCCESS;
if (switch_directory_exists(path, globals.pool) != SWITCH_STATUS_SUCCESS) {
dir_status = switch_dir_make(path, SWITCH_FPROT_OS_DEFAULT, globals.pool);
}
if (dir_status == SWITCH_STATUS_SUCCESS) {
switch_thread_rwlock_wrlock(globals.log_path_lock);
switch_safe_free(globals.err_log_dir[err_dir_index]);
globals.err_log_dir[err_dir_index] = path;
switch_thread_rwlock_unlock(globals.log_path_lock);
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to create new mod_json_cdr err_log_dir path\n");
switch_safe_free(path);
status = SWITCH_STATUS_FALSE;
}
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to generate new mod_json_cdr err_log_dir path\n");
status = SWITCH_STATUS_FALSE;
}
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Setting err log file path to %s\n", globals.base_err_log_dir[err_dir_index]);
if ((path = switch_safe_strdup(globals.base_err_log_dir[err_dir_index]))) {
switch_thread_rwlock_wrlock(globals.log_path_lock);
switch_safe_free(globals.err_log_dir[err_dir_index]);
switch_dir_make_recursive(path, SWITCH_DEFAULT_DIR_PERMS, globals.pool);
globals.err_log_dir[err_dir_index] = path;
switch_thread_rwlock_unlock(globals.log_path_lock);
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Failed to set err_log_dir path\n");
status = SWITCH_STATUS_FALSE;
}
}
}
return status;
}
static void backup_cdr(cdr_data_t *data)
{
if (globals.log_errors_to_disk) {
int fd = -1, err_dir_index;
char *path = NULL;
const char *json_text = data->json_text_escaped ? data->json_text_escaped : data->json_text;
for (err_dir_index = 0; err_dir_index < globals.err_dir_count; err_dir_index++) {
switch_thread_rwlock_rdlock(globals.log_path_lock);
path = switch_mprintf("%s%s%s", globals.err_log_dir[err_dir_index], SWITCH_PATH_SEPARATOR, data->filename);
switch_thread_rwlock_unlock(globals.log_path_lock);
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_INFO, "Backup file %s\n", path);
if (path) {
#ifdef _MSC_VER
mode_t mode = S_IRUSR | S_IWUSR;
#else
mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
#endif
if ((fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, mode)) > -1) {
switch_size_t json_len = strlen(json_text);
switch_ssize_t wrote = 0, x;
do { x = write(fd, json_text, json_len);
} while (!(x<0) && json_len > (wrote += x));
if (!(x<0)) do { x = write(fd, "\n", 1);
} while (!(x<0) && x<1);
close(fd);
if (x < 0) {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_ERROR, "Error writing [%s]\n",path);
if (0 > unlink(path))
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_ERROR, "Error unlinking [%s]\n",path);
}
switch_safe_free(path);
break;
} else {
char ebuf[512] = { 0 };
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_ERROR, "Can't open %s! [%s]\n",
path, switch_strerror_r(errno, ebuf, sizeof(ebuf)));
}
switch_safe_free(path);
}
}
} else {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_NOTICE, "Not writing to file\n");
}
}
void destroy_cdr_data(cdr_data_t *data)
{
switch_safe_free(data->json_text);
switch_safe_free(data->json_text_escaped);
switch_safe_free(data->uuid);
switch_safe_free(data->filename);
switch_safe_free(data->logdir);
switch_safe_free(data);
}
static void process_cdr(cdr_data_t *data)
{
char *curl_json_text = NULL;
long httpRes;
CURL *curl_handle = NULL;
switch_curl_slist_t *headers = NULL;
switch_curl_slist_t *slist = NULL;
int fd = -1;
uint32_t cur_try;
switch_assert(data != NULL);
if (globals.shutdown) {
goto end;
}
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_INFO, "Process [%s]\n", data->filename);
if (!zstr(data->logdir) && (globals.log_http_and_disk || !globals.url_count)) {
char *path = switch_mprintf("%s%s%s", data->logdir, SWITCH_PATH_SEPARATOR, data->filename);
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_INFO, "Log to disk [%s]\n", path);
if (path) {
#ifdef _MSC_VER
if ((fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR)) > -1) {
#else
if ((fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)) > -1) {
#endif
switch_size_t json_len = strlen(data->json_text);
switch_ssize_t wrote = 0, x;
do { x = write(fd, data->json_text, json_len);
} while (!(x<0) && json_len > (wrote += x));
if (!(x<0)) do { x = write(fd, "\n", 1);
} while (!(x<0) && x<1);
close(fd);
if (x < 0) {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_ERROR, "Error writing [%s]\n",path);
if (0 > unlink(path))
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_ERROR, "Error unlinking [%s]\n",path);
}
} else {
char ebuf[512] = { 0 };
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_ERROR, "Error writing [%s][%s]\n",
path, switch_strerror_r(errno, ebuf, sizeof(ebuf)));
}
switch_safe_free(path);
}
}
/* try to post it to the web server */
if (globals.url_count) {
char *destUrl = NULL;
curl_handle = switch_curl_easy_init();
if (globals.encode) {
if (globals.encode == ENCODING_DEFAULT) {
headers = switch_curl_slist_append(headers, "Content-Type: application/x-www-form-urlencoded");
} else {
headers = switch_curl_slist_append(headers, "Content-Type: application/x-www-form-base64-encoded");
}
curl_json_text = switch_mprintf("cdr=%s", data->json_text_escaped);
switch_assert(curl_json_text != NULL);
} else {
headers = switch_curl_slist_append(headers, "Content-Type: application/json");
curl_json_text = (char *)data->json_text;
}
if (!zstr(globals.cred)) {
switch_curl_easy_setopt(curl_handle, CURLOPT_HTTPAUTH, globals.auth_scheme);
switch_curl_easy_setopt(curl_handle, CURLOPT_USERPWD, globals.cred);
}
switch_curl_easy_setopt(curl_handle, CURLOPT_HTTPHEADER, headers);
switch_curl_easy_setopt(curl_handle, CURLOPT_POST, 1);
switch_curl_easy_setopt(curl_handle, CURLOPT_NOSIGNAL, 1);
switch_curl_easy_setopt(curl_handle, CURLOPT_POSTFIELDS, curl_json_text);
switch_curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "freeswitch-json/1.0");
switch_curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, httpCallBack);
if (globals.disable100continue) {
slist = switch_curl_slist_append(slist, "Expect:");
switch_curl_easy_setopt(curl_handle, CURLOPT_HTTPHEADER, slist);
}
if (!zstr(globals.ssl_cert_file)) {
switch_curl_easy_setopt(curl_handle, CURLOPT_SSLCERT, globals.ssl_cert_file);
}
if (!zstr(globals.ssl_key_file)) {
switch_curl_easy_setopt(curl_handle, CURLOPT_SSLKEY, globals.ssl_key_file);
}
if (!zstr(globals.ssl_key_password)) {
switch_curl_easy_setopt(curl_handle, CURLOPT_SSLKEYPASSWD, globals.ssl_key_password);
}
if (!zstr(globals.ssl_version)) {
if (!strcasecmp(globals.ssl_version, "SSLv3")) {
switch_curl_easy_setopt(curl_handle, CURLOPT_SSLVERSION, CURL_SSLVERSION_SSLv3);
} else if (!strcasecmp(globals.ssl_version, "TLSv1")) {
switch_curl_easy_setopt(curl_handle, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
}
}
if (!zstr(globals.ssl_cacert_file)) {
switch_curl_easy_setopt(curl_handle, CURLOPT_CAINFO, globals.ssl_cacert_file);
}
/* these were used for testing, optionally they may be enabled if someone desires
switch_curl_easy_setopt(curl_handle, CURLOPT_TIMEOUT, 120); // tcp timeout
switch_curl_easy_setopt(curl_handle, CURLOPT_FOLLOWLOCATION, 1); // 302 recursion level
*/
for (cur_try = 0; cur_try < globals.retries; cur_try++) {
if (cur_try > 0) {
switch_yield(globals.delay * 1000000);
}
destUrl = switch_mprintf("%s?uuid=%s", globals.urls[globals.url_index], data->uuid);
switch_curl_easy_setopt(curl_handle, CURLOPT_URL, destUrl);
if (!strncasecmp(destUrl, "https", 5)) {
switch_curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYPEER, 0);
switch_curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYHOST, 0);
}
if (globals.enable_cacert_check) {
switch_curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYPEER, TRUE);
}
if (globals.enable_ssl_verifyhost) {
switch_curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYHOST, 2);
}
switch_curl_easy_perform(curl_handle);
switch_curl_easy_getinfo(curl_handle, CURLINFO_RESPONSE_CODE, &httpRes);
switch_safe_free(destUrl);
if (httpRes >= 200 && httpRes < 300) {
goto end;
} else {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_ERROR, "Got error [%ld] posting to web server [%s]\n",
httpRes, globals.urls[globals.url_index]);
globals.url_index++;
switch_assert(globals.url_count <= MAX_URLS);
if (globals.url_index >= globals.url_count) {
globals.url_index = 0;
} else {
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_ERROR, "Retry will be with url [%s]\n", globals.urls[globals.url_index]);
}
}
}
switch_curl_easy_cleanup(curl_handle);
switch_curl_slist_free_all(headers);
switch_curl_slist_free_all(slist);
slist = NULL;
headers = NULL;
curl_handle = NULL;
/* if we are here the web post failed for some reason */
switch_log_printf(SWITCH_CHANNEL_UUID_LOG(data->uuid), SWITCH_LOG_ERROR, "Unable to post to web server\n");
backup_cdr(data);
}
end:
if (curl_handle) {
switch_curl_easy_cleanup(curl_handle);
}
if (headers) {
switch_curl_slist_free_all(headers);
}
if (slist) {
switch_curl_slist_free_all(slist);
}
if (curl_json_text != data->json_text) {
switch_safe_free(curl_json_text);
}
destroy_cdr_data(data);
}
static switch_status_t my_on_reporting(switch_core_session_t *session)
{
cJSON *json_cdr = NULL;
char *json_text = NULL;
char *json_text_escaped = NULL;
switch_channel_t *channel = switch_core_session_get_channel(session);
int is_b;
const char *a_prefix = "";
cdr_data_t *cdr_data = NULL;
const char *logdir = NULL;
if (globals.shutdown) {
return SWITCH_STATUS_SUCCESS;
}
is_b = channel && switch_channel_get_originator_caller_profile(channel);
if (!globals.log_b && is_b) {
const char *force_cdr = switch_channel_get_variable(channel, SWITCH_FORCE_PROCESS_CDR_VARIABLE);
if (!switch_true(force_cdr)) {
return SWITCH_STATUS_SUCCESS;
}
}
if (!is_b && globals.prefix_a) {
a_prefix = "a_";
}
if (switch_ivr_generate_json_cdr(session, &json_cdr, globals.encode_values == ENCODING_DEFAULT) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Error Generating Data!\n");
return SWITCH_STATUS_FALSE;
}
cdr_data = malloc(sizeof(cdr_data_t));
switch_assert(cdr_data);
json_text = cJSON_PrintUnformatted(json_cdr);
if (globals.url_count && globals.encode) {
switch_size_t need_bytes = strlen(json_text) * 3;
json_text_escaped = malloc(need_bytes);
switch_assert(json_text_escaped);
memset(json_text_escaped, 0, need_bytes);
if (globals.encode == ENCODING_DEFAULT) {
switch_url_encode(json_text, json_text_escaped, need_bytes);
} else {
switch_b64_encode((unsigned char *) json_text, need_bytes / 3, (unsigned char *) json_text_escaped, need_bytes);
}
}
cdr_data->uuid = strdup(switch_core_session_get_uuid(session));
cdr_data->filename = switch_mprintf("%s%s.cdr.json", a_prefix, cdr_data->uuid);
cdr_data->json_text = json_text;
cdr_data->json_text_escaped = json_text_escaped;
switch_thread_rwlock_rdlock(globals.log_path_lock);
if (!(logdir = switch_channel_get_variable(channel, "json_cdr_base"))) {
logdir = globals.log_dir;
}
cdr_data->logdir = switch_safe_strdup(logdir);
switch_thread_rwlock_unlock(globals.log_path_lock);
if (globals.queue) {
if (switch_queue_trypush(globals.queue, cdr_data) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "Unable to push cdr to queue\n");
backup_cdr(cdr_data);
destroy_cdr_data(cdr_data);
}
} else {
process_cdr(cdr_data);
}
cJSON_Delete(json_cdr);
return SWITCH_STATUS_SUCCESS;
}
static void *SWITCH_THREAD_FUNC cdr_thread(switch_thread_t *t, void *obj)
{
void *pop = NULL;
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CONSOLE, "Cdr thread started.\n");
while (!globals.shutdown) {
cdr_data_t *data = NULL;
if (switch_queue_pop(globals.queue, &pop) != SWITCH_STATUS_SUCCESS) {
break;
}
if (!pop) {
break;
}
data = (cdr_data_t *) pop;
process_cdr(data);
}
while (switch_queue_trypop(globals.queue, &pop) == SWITCH_STATUS_SUCCESS) {
destroy_cdr_data((cdr_data_t *) pop);
}
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CONSOLE, "Cdr thread ended.\n");
switch_thread_exit(t, SWITCH_STATUS_SUCCESS);
return NULL;
}
static void event_handler(switch_event_t *event)
{
const char *sig = switch_event_get_header(event, "Trapped-Signal");
if (sig && !strcmp(sig, "HUP")) {
if (globals.rotate) {
set_json_cdr_log_dirs();
}
}
}
static switch_state_handler_table_t state_handlers = {
/*.on_init */ NULL,
/*.on_routing */ NULL,
/*.on_execute */ NULL,
/*.on_hangup */ NULL,
/*.on_exchange_media */ NULL,
/*.on_soft_execute */ NULL,
/*.on_consume_media */ NULL,
/*.on_hibernate */ NULL,
/*.on_reset */ NULL,
/*.on_park */ NULL,
/*.on_reporting */ my_on_reporting
};
SWITCH_MODULE_LOAD_FUNCTION(mod_json_cdr_load)
{
char *cf = "json_cdr.conf";
switch_xml_t cfg, xml, settings, param;
switch_status_t status = SWITCH_STATUS_SUCCESS;
memset(&globals, 0, sizeof(globals));
globals.log_http_and_disk = 0;
globals.log_errors_to_disk = SWITCH_TRUE;
globals.log_b = 1;
globals.disable100continue = 0;
globals.pool = pool;
globals.auth_scheme = CURLAUTH_BASIC;
globals.encode_values = ENCODING_DEFAULT;
switch_thread_rwlock_create(&globals.log_path_lock, pool);
/* parse the config */
if (!(xml = switch_xml_open_cfg(cf, &cfg, NULL))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Open of %s failed\n", cf);
return SWITCH_STATUS_TERM;
}
if ((settings = switch_xml_child(cfg, "settings"))) {
for (param = switch_xml_child(settings, "param"); param; param = param->next) {
char *var = (char *) switch_xml_attr_soft(param, "name");
char *val = (char *) switch_xml_attr_soft(param, "value");
if (!strcasecmp(var, "cred") && !zstr(val)) {
globals.cred = switch_core_strdup(globals.pool, val);
} else if (!strcasecmp(var, "url") && !zstr(val)) {
if (globals.url_count >= MAX_URLS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "maximum urls configured!\n");
} else {
globals.urls[globals.url_count++] = switch_core_strdup(globals.pool, val);
}
} else if (!strcasecmp(var, "log-http-and-disk")) {
globals.log_http_and_disk = switch_true(val);
} else if (!strcasecmp(var, "log-errors-to-disk")) {
globals.log_errors_to_disk = !switch_false(val);
} else if (!strcasecmp(var, "delay") && !zstr(val)) {
globals.delay = (uint32_t) atoi(val);
} else if (!strcasecmp(var, "log-b-leg")) {
globals.log_b = switch_true(val);
} else if (!strcasecmp(var, "prefix-a-leg")) {
globals.prefix_a = switch_true(val);
} else if (!strcasecmp(var, "disable-100-continue") && switch_true(val)) {
globals.disable100continue = 1;
} else if (!strcasecmp(var, "encode") && !zstr(val)) {
if (!strcasecmp(val, "base64")) {
globals.encode = ENCODING_BASE64;
} else {
globals.encode = switch_true(val) ? ENCODING_DEFAULT : ENCODING_NONE;
}
} else if (!strcasecmp(var, "retries") && !zstr(val)) {
globals.retries = (uint32_t) atoi(val);
} else if (!strcasecmp(var, "rotate") && !zstr(val)) {
globals.rotate = switch_true(val);
} else if (!strcasecmp(var, "log-dir")) {
if (zstr(val)) {
globals.base_log_dir = switch_core_sprintf(globals.pool, "%s%sjson_cdr", SWITCH_GLOBAL_dirs.log_dir, SWITCH_PATH_SEPARATOR);
} else {
if (switch_is_file_path(val)) {
globals.base_log_dir = switch_core_strdup(globals.pool, val);
} else {
globals.base_log_dir = switch_core_sprintf(globals.pool, "%s%s%s", SWITCH_GLOBAL_dirs.log_dir, SWITCH_PATH_SEPARATOR, val);
}
}
} else if (!strcasecmp(var, "err-log-dir")) {
if (globals.err_dir_count >= MAX_ERR_DIRS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "maximum error directories configured!\n");
} else {
if (zstr(val)) {
globals.base_err_log_dir[globals.err_dir_count++] = switch_core_sprintf(globals.pool, "%s%sjson_cdr", SWITCH_GLOBAL_dirs.log_dir, SWITCH_PATH_SEPARATOR);
} else {
if (switch_is_file_path(val)) {
globals.base_err_log_dir[globals.err_dir_count++] = switch_core_strdup(globals.pool, val);
} else {
globals.base_err_log_dir[globals.err_dir_count++] = switch_core_sprintf(globals.pool, "%s%s%s", SWITCH_GLOBAL_dirs.log_dir, SWITCH_PATH_SEPARATOR, val);
}
}
}
} else if (!strcasecmp(var, "enable-cacert-check") && switch_true(val)) {
globals.enable_cacert_check = 1;
} else if (!strcasecmp(var, "ssl-cert-path")) {
globals.ssl_cert_file = switch_core_strdup(globals.pool, val);
} else if (!strcasecmp(var, "ssl-key-path")) {
globals.ssl_key_file = switch_core_strdup(globals.pool, val);
} else if (!strcasecmp(var, "ssl-key-password")) {
globals.ssl_key_password = switch_core_strdup(globals.pool, val);
} else if (!strcasecmp(var, "ssl-version")) {
globals.ssl_version = switch_core_strdup(globals.pool, val);
} else if (!strcasecmp(var, "ssl-cacert-file")) {
globals.ssl_cacert_file = switch_core_strdup(globals.pool, val);
} else if (!strcasecmp(var, "enable-ssl-verifyhost") && switch_true(val)) {
globals.enable_ssl_verifyhost = 1;
} else if (!strcasecmp(var, "auth-scheme")) {
if (*val == '=') {
globals.auth_scheme = 0;
val++;
}
if (!strcasecmp(val, "basic")) {
globals.auth_scheme |= CURLAUTH_BASIC;
} else if (!strcasecmp(val, "digest")) {
globals.auth_scheme |= CURLAUTH_DIGEST;
} else if (!strcasecmp(val, "NTLM")) {
globals.auth_scheme |= CURLAUTH_NTLM;
} else if (!strcasecmp(val, "GSS-NEGOTIATE")) {
globals.auth_scheme |= CURLAUTH_GSSNEGOTIATE;
} else if (!strcasecmp(val, "any")) {
globals.auth_scheme = (long)CURLAUTH_ANY;
}
} else if (!strcasecmp(var, "encode-values") && !zstr(val)) {
globals.encode_values = switch_true(val) ? ENCODING_DEFAULT : ENCODING_NONE;
} else if (!strcasecmp(var, "queue-capacity") && !zstr(val)) {
int capacity = atoi(val);
if (capacity > 0) {
switch_threadattr_t *thd_attr;
switch_queue_create(&globals.queue, capacity, globals.pool);
switch_threadattr_create(&thd_attr, globals.pool);
switch_threadattr_stacksize_set(thd_attr, SWITCH_THREAD_STACKSIZE);
switch_thread_create(&globals.thread, thd_attr, cdr_thread, NULL, globals.pool);
}
}
}
if (!globals.err_dir_count) {
if (!zstr(globals.base_log_dir)) {
globals.base_err_log_dir[globals.err_dir_count++] = switch_core_strdup(globals.pool, globals.base_log_dir);
} else {
globals.base_err_log_dir[globals.err_dir_count++] = switch_core_sprintf(globals.pool, "%s%sjson_cdr", SWITCH_GLOBAL_dirs.log_dir, SWITCH_PATH_SEPARATOR);
}
}
}
if (globals.retries && !globals.delay) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Retries set but delay 0 setting to 5 seconds\n");
globals.delay = 5;
}
globals.retries++;
set_json_cdr_log_dirs();
if (switch_event_bind_removable(modname, SWITCH_EVENT_TRAP, SWITCH_EVENT_SUBCLASS_ANY, event_handler, NULL, &globals.node) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't bind!\n");
return SWITCH_STATUS_GENERR;
}
/* test global state handlers */
switch_core_add_state_handler(&state_handlers);
*module_interface = switch_loadable_module_create_module_interface(pool, modname);
switch_xml_free(xml);
return status;
}
SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_json_cdr_shutdown)
{
int err_dir_index = 0;
switch_status_t status;
globals.shutdown = 1;
if (globals.queue) {
switch_queue_push(globals.queue, NULL);
switch_thread_join(&status, globals.thread);
}
switch_safe_free(globals.log_dir);
for (;err_dir_index < globals.err_dir_count; err_dir_index++) {
switch_safe_free(globals.err_log_dir[err_dir_index]);
}
switch_event_unbind(&globals.node);
switch_core_remove_state_handler(&state_handlers);
switch_thread_rwlock_destroy(globals.log_path_lock);
return SWITCH_STATUS_SUCCESS;
}
/* For Emacs:
* Local Variables:
* mode:c
* indent-tabs-mode:t
* tab-width:4
* c-basic-offset:4
* End:
* For VIM:
* vim:set softtabstop=4 shiftwidth=4 tabstop=4 noet:
*/
加载 mod时候
SWITCH_MODULE_LOAD_FUNCTION(mod_json_cdr_load)
我们看看处理初始化参数，解析json_cdr.conf
设置日志目录，
然后就是关键：
switch_core_add_state_handler(&state_handlers);
*module_interface = switch_loadable_module_create_module_interface(pool, modname);
向核心注册 state_handler 。
static switch_state_handler_table_t state_handlers = {
/*.on_init */ NULL,
/*.on_routing */ NULL,
/*.on_execute */ NULL,
/*.on_hangup */ NULL,
/*.on_exchange_media */ NULL,
/*.on_soft_execute */ NULL,
/*.on_consume_media */ NULL,
/*.on_hibernate */ NULL,
/*.on_reset */ NULL,
/*.on_park */ NULL,
/*.on_reporting */ my_on_reporting
};
关于freeswitch的state handler的调用处理，可以关注我的文档，已经有解析。
在on_reporing 时候进行的就是cdr 回调，如果要自定义模块，那么此必不可少。
my_on_reporting 函数，就是处理回调逻辑。
初始化 cdr_data 数据，如果配置了队列，使用队列逻辑异步处理，如果没有配置queue进行 process_cdr。
如果在load mod时候配置了queue
} else if (!strcasecmp(var, "queue-capacity") && !zstr(val)) {
int capacity = atoi(val);
if (capacity > 0) {
switch_threadattr_t *thd_attr;
switch_queue_create(&globals.queue, capacity, globals.pool);
switch_threadattr_create(&thd_attr, globals.pool);
switch_threadattr_stacksize_set(thd_attr, SWITCH_THREAD_STACKSIZE);
switch_thread_create(&globals.thread, thd_attr, cdr_thread, NULL, globals.pool);
}
}
生成了单独线程处理queue。
queue肯定是线程循环，处理再进行process_cdr
果然：所以，我们分析一下process_cdr, 就是整个mod_json_cdr 的核心函数了。
process_cdr
学习源码有福了，如果你刚好想在freeswitch里面使用http请求，那么这就是最好的教学了。
添加http header：
headers = switch_curl_slist_append(headers, "Content-Type: application/json")
switch_curl_easy_setopt(curl_handle, CURLOPT_HTTPHEADER, headers);
设置参数
switch_curl_easy_setopt(curl_handle, CURLOPT_POST, 1);
switch_curl_easy_setopt(curl_handle, CURLOPT_NOSIGNAL, 1);
switch_curl_easy_setopt(curl_handle, CURLOPT_POSTFIELDS, curl_json_text);
switch_curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "freeswitch-json/1.0");
switch_curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, httpCallBack);
发送
switch_curl_easy_perform(curl_handle); switch_curl_easy_getinfo(curl_handle, CURLINFO_RESPONSE_CODE, &httpRes); switch_safe_free(destUrl);
ok，那么此次分析结束，如果你想自己实现源码，自定义cdr，那可以参考json——cdr。 你必须要关注的几个点，文章已经说明了 注册state回调核心，同时，我们也学习了freeswitch-http请求的实现。