lighttpd 1.4.x https://www.lighttpd.net/
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#include "first.h"
#include "base.h"
#include "log.h"
#include "buffer.h"
#include "http_header.h"
#include "plugin.h"
#include <stdlib.h>
#include <string.h>
/**
* this is a uploadprogress for a lighttpd plugin
*
*/
typedef struct {
buffer *con_id;
connection *con;
} connection_map_entry;
typedef struct {
connection_map_entry **ptr;
size_t used;
size_t size;
} connection_map;
/* plugin config for all request/connections */
typedef struct {
buffer *progress_url;
} plugin_config;
typedef struct {
PLUGIN_DATA;
connection_map *con_map;
plugin_config **config_storage;
plugin_config conf;
} plugin_data;
/**
*
* connection maps
*
*/
/* init the plugin data */
static connection_map *connection_map_init() {
connection_map *cm;
cm = calloc(1, sizeof(*cm));
return cm;
}
static void connection_map_free(connection_map *cm) {
size_t i;
for (i = 0; i < cm->size; i++) {
connection_map_entry *cme = cm->ptr[i];
if (!cme) break;
if (cme->con_id) {
buffer_free(cme->con_id);
}
free(cme);
}
free(cm);
}
static int connection_map_insert(connection_map *cm, connection *con, const char *con_id, size_t idlen) {
connection_map_entry *cme;
size_t i;
if (cm->used == cm->size) {
cm->size += 16;
cm->ptr = realloc(cm->ptr, cm->size * sizeof(*(cm->ptr)));
for (i = cm->used; i < cm->size; i++) {
cm->ptr[i] = NULL;
}
}
if (cm->ptr[cm->used]) {
/* is already alloced, just reuse it */
cme = cm->ptr[cm->used];
} else {
cme = malloc(sizeof(*cme));
cme->con_id = buffer_init();
}
buffer_copy_string_len(cme->con_id, con_id, idlen);
cme->con = con;
cm->ptr[cm->used++] = cme;
return 0;
}
static connection *connection_map_get_connection(connection_map *cm, const char *con_id, size_t idlen) {
size_t i;
for (i = 0; i < cm->used; i++) {
connection_map_entry *cme = cm->ptr[i];
if (buffer_is_equal_string(cme->con_id, con_id, idlen)) {
/* found connection */
return cme->con;
}
}
return NULL;
}
static int connection_map_remove_connection(connection_map *cm, connection *con) {
size_t i;
for (i = 0; i < cm->used; i++) {
connection_map_entry *cme = cm->ptr[i];
if (cme->con == con) {
/* found connection */
buffer_clear(cme->con_id);
cme->con = NULL;
cm->used--;
/* swap positions with the last entry */
if (cm->used) {
cm->ptr[i] = cm->ptr[cm->used];
cm->ptr[cm->used] = cme;
}
return 1;
}
}
return 0;
}
/* init the plugin data */
INIT_FUNC(mod_uploadprogress_init) {
plugin_data *p;
p = calloc(1, sizeof(*p));
p->con_map = connection_map_init();
return p;
}
/* detroy the plugin data */
FREE_FUNC(mod_uploadprogress_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;
buffer_free(s->progress_url);
free(s);
}
free(p->config_storage);
}
connection_map_free(p->con_map);
free(p);
return HANDLER_GO_ON;
}
/* handle plugin config and check values */
SETDEFAULTS_FUNC(mod_uploadprogress_set_defaults) {
plugin_data *p = p_d;
size_t i = 0;
config_values_t cv[] = {
{ "upload-progress.progress-url", NULL, T_CONFIG_STRING, 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->progress_url = buffer_init();
cv[0].destination = s->progress_url;
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_uploadprogress_patch_connection(server *srv, connection *con, plugin_data *p) {
size_t i, j;
plugin_config *s = p->config_storage[0];
PATCH(progress_url);
/* 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("upload-progress.progress-url"))) {
PATCH(progress_url);
}
}
}
return 0;
}
#undef PATCH
/**
*
* the idea:
*
* for the first request we check if it is a post-request
*
* if no, move out, don't care about them
*
* if yes, take the connection structure and register it locally
* in the progress-struct together with an session-id (md5 ... )
*
* if the connections closes, cleanup the entry in the progress-struct
*
* a second request can now get the info about the size of the upload,
* the received bytes
*
*/
URIHANDLER_FUNC(mod_uploadprogress_uri_handler) {
plugin_data *p = p_d;
size_t len;
char *id;
buffer *b;
connection *post_con = NULL;
int pathinfo = 0;
if (buffer_string_is_empty(con->uri.path)) return HANDLER_GO_ON;
switch(con->request.http_method) {
case HTTP_METHOD_GET:
case HTTP_METHOD_POST: break;
default: return HANDLER_GO_ON;
}
mod_uploadprogress_patch_connection(srv, con, p);
if (buffer_string_is_empty(p->conf.progress_url)) return HANDLER_GO_ON;
if (con->request.http_method == HTTP_METHOD_GET) {
if (!buffer_is_equal(con->uri.path, p->conf.progress_url)) {
return HANDLER_GO_ON;
}
}
if (NULL != (b = http_header_request_get(con, HTTP_HEADER_OTHER, CONST_STR_LEN("X-Progress-ID")))) {
id = b->ptr;
} else if (!buffer_string_is_empty(con->uri.query)
&& (id = strstr(con->uri.query->ptr, "X-Progress-ID="))) {
/* perhaps the POST request is using the query-string to pass the X-Progress-ID */
id += sizeof("X-Progress-ID=")-1;
} else {
/*(path-info is not known at this point in request)*/
id = con->uri.path->ptr;
len = buffer_string_length(con->uri.path);
if (len >= 33 && id[len-33] == '/') {
id += len - 32;
pathinfo = 1;
} else {
return HANDLER_GO_ON;
}
}
/* the request has to contain a 32byte ID */
for (len = 0; light_isxdigit(id[len]); ++len) ;
if (len != 32) {
if (!pathinfo) { /*(reduce false positive noise in error log)*/
log_error_write(srv, __FILE__, __LINE__, "ss",
"invalid progress-id; non-xdigit or len != 32:", id);
}
return HANDLER_GO_ON;
}
/* check if this is a POST request */
switch(con->request.http_method) {
case HTTP_METHOD_POST:
connection_map_insert(p->con_map, con, id, len);
return HANDLER_GO_ON;
case HTTP_METHOD_GET:
buffer_reset(con->physical.path);
con->file_started = 1;
con->file_finished = 1;
con->http_status = 200;
con->mode = DIRECT;
/* get the connection */
if (NULL == (post_con = connection_map_get_connection(p->con_map, id, len))) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"ID not known:", id);
chunkqueue_append_mem(con->write_queue, CONST_STR_LEN("not in progress"));
return HANDLER_FINISHED;
}
http_header_response_set(con, HTTP_HEADER_CONTENT_TYPE, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("text/xml"));
/* just an attempt the force the IE/proxies to NOT cache the request ... doesn't help :( */
http_header_response_set(con, HTTP_HEADER_OTHER, CONST_STR_LEN("Pragma"), CONST_STR_LEN("no-cache"));
http_header_response_set(con, HTTP_HEADER_OTHER, CONST_STR_LEN("Expires"), CONST_STR_LEN("Thu, 19 Nov 1981 08:52:00 GMT"));
http_header_response_set(con, HTTP_HEADER_CACHE_CONTROL, CONST_STR_LEN("Cache-Control"), CONST_STR_LEN("no-store, no-cache, must-revalidate, post-check=0, pre-check=0"));
/* prepare XML */
b = srv->tmp_buf;
buffer_copy_string_len(b, CONST_STR_LEN(
"<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>"
"<upload>"
"<size>"));
buffer_append_int(b, post_con->request.content_length);
buffer_append_string_len(b, CONST_STR_LEN(
"</size>"
"<received>"));
buffer_append_int(b, post_con->request_content_queue->bytes_in);
buffer_append_string_len(b, CONST_STR_LEN(
"</received>"
"</upload>"));
chunkqueue_append_mem(con->write_queue, CONST_BUF_LEN(b));
return HANDLER_FINISHED;
default:
break;
}
return HANDLER_GO_ON;
}
REQUESTDONE_FUNC(mod_uploadprogress_request_done) {
plugin_data *p = p_d;
UNUSED(srv);
if (con->request.http_method != HTTP_METHOD_POST) return HANDLER_GO_ON;
if (buffer_string_is_empty(con->uri.path)) return HANDLER_GO_ON;
if (connection_map_remove_connection(p->con_map, con)) {
/* removed */
}
return HANDLER_GO_ON;
}
/* this function is called at dlopen() time and inits the callbacks */
int mod_uploadprogress_plugin_init(plugin *p);
int mod_uploadprogress_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = buffer_init_string("uploadprogress");
p->init = mod_uploadprogress_init;
p->handle_uri_clean = mod_uploadprogress_uri_handler;
p->connection_reset = mod_uploadprogress_request_done;
p->set_defaults = mod_uploadprogress_set_defaults;
p->cleanup = mod_uploadprogress_free;
p->data = NULL;
return 0;
}