lighttpd 1.4.x https://www.lighttpd.net/
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#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
#include "base.h"
#include "log.h"
#include "buffer.h"
#include "response.h"
#include "plugin.h"
#include "config.h"
/**
* this is a webdav for a lighttpd plugin
*
* at least a very basic one.
* - for now it is read-only and we only support PROPFIND
*
*/
/* plugin config for all request/connections */
typedef struct {
array *match;
} plugin_config;
typedef struct {
PLUGIN_DATA;
buffer *tmp_buf;
plugin_config **config_storage;
plugin_config conf;
} plugin_data;
/* init the plugin data */
INIT_FUNC(mod_webdav_init) {
plugin_data *p;
p = calloc(1, sizeof(*p));
p->tmp_buf = buffer_init();
return p;
}
/* detroy the plugin data */
FREE_FUNC(mod_webdav_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];
array_free(s->match);
free(s);
}
free(p->config_storage);
}
buffer_free(p->tmp_buf);
free(p);
return HANDLER_GO_ON;
}
/* handle plugin config and check values */
SETDEFAULTS_FUNC(mod_webdav_set_defaults) {
plugin_data *p = p_d;
size_t i = 0;
config_values_t cv[] = {
{ "webdav.array", 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(specific_config *));
for (i = 0; i < srv->config_context->used; i++) {
plugin_config *s;
s = calloc(1, sizeof(plugin_config));
s->match = array_init();
cv[0].destination = s->match;
p->config_storage[i] = s;
if (0 != config_insert_values_global(srv, ((data_config *)srv->config_context->data[i])->value, cv)) {
return HANDLER_ERROR;
}
}
return HANDLER_GO_ON;
}
#define PATCH(x) \
p->conf.x = s->x;
static int mod_webdav_patch_connection(server *srv, connection *con, plugin_data *p) {
size_t i, j;
plugin_config *s = p->config_storage[0];
PATCH(match);
/* 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("webdav.array"))) {
PATCH(match);
}
}
}
return 0;
}
#undef PATCH
URIHANDLER_FUNC(mod_webdav_uri_handler) {
plugin_data *p = p_d;
UNUSED(srv);
if (con->uri.path->used == 0) return HANDLER_GO_ON;
mod_webdav_patch_connection(srv, con, p);
switch (con->request.http_method) {
case HTTP_METHOD_OPTIONS:
response_header_overwrite(srv, con, CONST_STR_LEN("DAV"), CONST_STR_LEN("1,2"));
response_header_overwrite(srv, con, CONST_STR_LEN("MS-Author-Via"), CONST_STR_LEN("DAV"));
response_header_insert(srv, con, CONST_STR_LEN("Allow"), CONST_STR_LEN("PROPFIND"));
break;
default:
break;
}
/* not found */
return HANDLER_GO_ON;
}
static int get_response_entry(server *srv, connection *con, plugin_data *p, buffer *b, const char *filename) {
struct stat st;
buffer_append_string(b,"<D:response xmlns:ns0=\"urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/\">\n");
buffer_append_string(b,"<D:href>\n");
buffer_append_string_buffer(b, con->uri.path);
BUFFER_APPEND_SLASH(b);
buffer_append_string(b, filename);
buffer_append_string(b,"</D:href>\n");
buffer_append_string(b,"<D:propstat>\n");
/* we have to stat now */
buffer_copy_string_buffer(p->tmp_buf, con->physical.path);
BUFFER_APPEND_SLASH(p->tmp_buf);
buffer_append_string(p->tmp_buf, filename);
if (0 == stat(p->tmp_buf->ptr, &st)) {
char ctime_buf[] = "2005-08-18T07:27:16Z";
char mtime_buf[] = "Thu, 18 Aug 2005 07:27:16 GMT";
size_t k;
buffer_append_string(b,"<D:prop>\n");
if (S_ISDIR(st.st_mode)) {
buffer_append_string(b, "<D:resourcetype><D:collection/></D:resourcetype>"
"<D:getcontenttype>httpd/unix-directory</D:getcontenttype>\n");
}
buffer_append_string(b, "<D:creationdate ns0:dt=\"dateTime.tz\">");
strftime(ctime_buf, sizeof(ctime_buf), "%Y-%m-%dT%H:%M:%SZ", gmtime(&st.st_ctime));
buffer_append_string(b, ctime_buf);
buffer_append_string(b, "</D:creationdate>");
buffer_append_string(b,"<D:getlastmodified ns0:dt=\"dateTime.rfc1123\">");
strftime(mtime_buf, sizeof(mtime_buf), "%a, %d %b %Y %H:%M:%S GMT", gmtime(&st.st_mtime));
buffer_append_string(b, mtime_buf);
buffer_append_string(b, "</D:getlastmodified>");
buffer_append_string(b,"<D:getcontentlength>");
buffer_append_off_t(b, st.st_size);
buffer_append_string(b, "</D:getcontentlength>");
buffer_append_string(b,"<D:getcontentlanguage>");
buffer_append_string(b, "en");
buffer_append_string(b, "</D:getcontentlanguage>");
for (k = 0; k < con->conf.mimetypes->used; k++) {
data_string *ds = (data_string *)con->conf.mimetypes->data[k];
if (ds->key->used == 0) continue;
if (buffer_is_equal_right_len(p->tmp_buf, ds->key, ds->key->used - 1)) {
buffer_append_string(b,"<D:contenttype>");
buffer_append_string_buffer(b, ds->value);
buffer_append_string(b, "</D:contenttype>");
break;
}
}
buffer_append_string(b,"</D:prop>\n");
buffer_append_string(b,"<D:status>HTTP/1.1 200 OK</D:status>\n");
} else {
buffer_append_string(b,"<D:status>HTTP/1.1 404 Not Found</D:status>\n");
}
buffer_append_string(b,"</D:propstat>\n");
buffer_append_string(b,"</D:response>\n");
return 0;
}
URIHANDLER_FUNC(mod_webdav_subrequest_handler) {
plugin_data *p = p_d;
buffer *b;
DIR *dir;
data_string *ds;
int depth = -1;
UNUSED(srv);
/* physical path is setup */
if (con->physical.path->used == 0) return HANDLER_GO_ON;
switch (con->request.http_method) {
case HTTP_METHOD_PROPFIND:
/* they want to know the properties of the directory */
if (NULL != (ds = (data_string *)array_get_element(con->request.headers, "Depth"))) {
depth = strtol(ds->value->ptr, NULL, 10);
}
con->http_status = 207;
response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("text/xml; charset=\"utf-8\""));
b = chunkqueue_get_append_buffer(con->write_queue);
buffer_copy_string(b,
"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
buffer_append_string(b,"<D:multistatus xmlns:D=\"DAV:\">\n");
switch(depth) {
case 0:
/* Depth: 0 */
get_response_entry(srv, con, p, b, "");
break;
case 1:
if (NULL != (dir = opendir(con->physical.path->ptr))) {
struct dirent *de;
while(NULL != (de = readdir(dir))) {
if (de->d_name[0] == '.' && de->d_name[1] == '\0') {
/* ignore the currrent dir */
} else {
get_response_entry(srv, con, p, b, de->d_name);
}
}
closedir(dir);
}
break;
}
buffer_append_string(b,"</D:multistatus>\n");
con->file_finished = 1;
return HANDLER_FINISHED;
default:
break;
}
/* not found */
return HANDLER_GO_ON;
}
/* this function is called at dlopen() time and inits the callbacks */
int mod_webdav_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = buffer_init_string("webdav");
p->init = mod_webdav_init;
p->handle_uri_clean = mod_webdav_uri_handler;
p->handle_physical = mod_webdav_subrequest_handler;
p->set_defaults = mod_webdav_set_defaults;
p->cleanup = mod_webdav_free;
p->data = NULL;
return 0;
}