lighttpd 1.4.x https://www.lighttpd.net/
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#include "base.h"
#include "log.h"
#include "buffer.h"
#include "response.h"
#include "http_chunk.h"
#include "stat_cache.h"
#include "plugin.h"
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
/* plugin config for all request/connections */
typedef struct {
array *extensions;
} plugin_config;
typedef struct {
PLUGIN_DATA;
buffer *query_str;
array *get_params;
plugin_config **config_storage;
plugin_config conf;
} plugin_data;
/* init the plugin data */
INIT_FUNC(mod_flv_streaming_init) {
plugin_data *p;
p = calloc(1, sizeof(*p));
p->query_str = buffer_init();
p->get_params = array_init();
return p;
}
/* detroy the plugin data */
FREE_FUNC(mod_flv_streaming_free) {
plugin_data *p = p_d;
UNUSED(srv);
if (!p) return HANDLER_GO_ON;
if (p->config_storage) {
size_t i;
for (i = 0; i < srv->config_context->used; i++) {
plugin_config *s = p->config_storage[i];
if (NULL == s) continue;
array_free(s->extensions);
free(s);
}
free(p->config_storage);
}
buffer_free(p->query_str);
array_free(p->get_params);
free(p);
return HANDLER_GO_ON;
}
/* handle plugin config and check values */
SETDEFAULTS_FUNC(mod_flv_streaming_set_defaults) {
plugin_data *p = p_d;
size_t i = 0;
config_values_t cv[] = {
{ "flv-streaming.extensions", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
};
if (!p) return HANDLER_ERROR;
p->config_storage = calloc(1, srv->config_context->used * sizeof(plugin_config *));
for (i = 0; i < srv->config_context->used; i++) {
data_config const* config = (data_config const*)srv->config_context->data[i];
plugin_config *s;
s = calloc(1, sizeof(plugin_config));
s->extensions = array_init();
cv[0].destination = s->extensions;
p->config_storage[i] = s;
if (0 != config_insert_values_global(srv, config->value, cv, i == 0 ? T_CONFIG_SCOPE_SERVER : T_CONFIG_SCOPE_CONNECTION)) {
return HANDLER_ERROR;
}
}
return HANDLER_GO_ON;
}
#define PATCH(x) \
p->conf.x = s->x;
static int mod_flv_streaming_patch_connection(server *srv, connection *con, plugin_data *p) {
size_t i, j;
plugin_config *s = p->config_storage[0];
PATCH(extensions);
/* skip the first, the global context */
for (i = 1; i < srv->config_context->used; i++) {
data_config *dc = (data_config *)srv->config_context->data[i];
s = p->config_storage[i];
/* condition didn't match */
if (!config_check_cond(srv, con, dc)) continue;
/* merge config */
for (j = 0; j < dc->value->used; j++) {
data_unset *du = dc->value->data[j];
if (buffer_is_equal_string(du->key, CONST_STR_LEN("flv-streaming.extensions"))) {
PATCH(extensions);
}
}
}
return 0;
}
#undef PATCH
static int split_get_params(array *get_params, buffer *qrystr) {
size_t is_key = 1;
size_t i, len;
char *key = NULL, *val = NULL;
key = qrystr->ptr;
/* we need the \0 */
len = buffer_string_length(qrystr);
for (i = 0; i <= len; i++) {
switch(qrystr->ptr[i]) {
case '=':
if (is_key) {
val = qrystr->ptr + i + 1;
qrystr->ptr[i] = '\0';
is_key = 0;
}
break;
case '&':
case '\0': /* fin symbol */
if (!is_key) {
data_string *ds;
/* we need at least a = since the last & */
/* terminate the value */
qrystr->ptr[i] = '\0';
if (NULL == (ds = (data_string *)array_get_unused_element(get_params, TYPE_STRING))) {
ds = data_string_init();
}
buffer_copy_string_len(ds->key, key, strlen(key));
buffer_copy_string_len(ds->value, val, strlen(val));
array_insert_unique(get_params, (data_unset *)ds);
}
key = qrystr->ptr + i + 1;
val = NULL;
is_key = 1;
break;
}
}
return 0;
}
URIHANDLER_FUNC(mod_flv_streaming_path_handler) {
plugin_data *p = p_d;
int s_len;
size_t k;
UNUSED(srv);
if (con->mode != DIRECT) return HANDLER_GO_ON;
if (buffer_string_is_empty(con->physical.path)) return HANDLER_GO_ON;
mod_flv_streaming_patch_connection(srv, con, p);
s_len = buffer_string_length(con->physical.path);
for (k = 0; k < p->conf.extensions->used; k++) {
data_string *ds = (data_string *)p->conf.extensions->data[k];
int ct_len = buffer_string_length(ds->value);
if (ct_len > s_len) continue;
if (buffer_is_empty(ds->value)) continue;
if (0 == strncmp(con->physical.path->ptr + s_len - ct_len, ds->value->ptr, ct_len)) {
data_string *get_param;
stat_cache_entry *sce = NULL;
int start;
char *err = NULL;
/* if there is a start=[0-9]+ in the header use it as start,
* otherwise send the full file */
array_reset(p->get_params);
buffer_copy_buffer(p->query_str, con->uri.query);
split_get_params(p->get_params, p->query_str);
if (NULL == (get_param = (data_string *)array_get_element(p->get_params, "start"))) {
return HANDLER_GO_ON;
}
/* too short */
if (buffer_string_is_empty(get_param->value)) return HANDLER_GO_ON;
/* check if it is a number */
start = strtol(get_param->value->ptr, &err, 10);
if (*err != '\0') {
return HANDLER_GO_ON;
}
if (start <= 0) return HANDLER_GO_ON;
/* check if start is > filesize */
if (HANDLER_GO_ON != stat_cache_get_entry(srv, con, con->physical.path, &sce)) {
return HANDLER_GO_ON;
}
if (start > sce->st.st_size) {
return HANDLER_GO_ON;
}
/* we are safe now, let's build a flv header */
http_chunk_append_mem(srv, con, CONST_STR_LEN("FLV\x1\x1\0\0\0\x9\0\0\0\x9"));
http_chunk_append_file(srv, con, con->physical.path, start, sce->st.st_size - start);
http_chunk_close(srv, con);
response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("video/x-flv"));
con->file_finished = 1;
return HANDLER_FINISHED;
}
}
/* not found */
return HANDLER_GO_ON;
}
/* this function is called at dlopen() time and inits the callbacks */
int mod_flv_streaming_plugin_init(plugin *p);
int mod_flv_streaming_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = buffer_init_string("flv_streaming");
p->init = mod_flv_streaming_init;
p->handle_physical = mod_flv_streaming_path_handler;
p->set_defaults = mod_flv_streaming_set_defaults;
p->cleanup = mod_flv_streaming_free;
p->data = NULL;
return 0;
}