324 lines
7.7 KiB
C
324 lines
7.7 KiB
C
#include <sys/types.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <dirent.h>
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#include "base.h"
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#include "log.h"
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#include "buffer.h"
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#include "response.h"
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#include "plugin.h"
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#include "config.h"
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/**
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* this is a webdav for a lighttpd plugin
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*
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* at least a very basic one.
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* - for now it is read-only and we only support PROPFIND
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*
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*/
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/* plugin config for all request/connections */
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typedef struct {
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unsigned short *enabled;
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} plugin_config;
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typedef struct {
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PLUGIN_DATA;
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buffer *tmp_buf;
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plugin_config **config_storage;
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plugin_config conf;
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} plugin_data;
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/* init the plugin data */
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INIT_FUNC(mod_webdav_init) {
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plugin_data *p;
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p = calloc(1, sizeof(*p));
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p->tmp_buf = buffer_init();
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return p;
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}
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/* detroy the plugin data */
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FREE_FUNC(mod_webdav_free) {
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plugin_data *p = p_d;
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UNUSED(srv);
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if (!p) return HANDLER_GO_ON;
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if (p->config_storage) {
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size_t i;
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for (i = 0; i < srv->config_context->used; i++) {
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plugin_config *s = p->config_storage[i];
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if (!s) continue;
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free(s);
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}
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free(p->config_storage);
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}
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buffer_free(p->tmp_buf);
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free(p);
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return HANDLER_GO_ON;
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}
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/* handle plugin config and check values */
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SETDEFAULTS_FUNC(mod_webdav_set_defaults) {
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plugin_data *p = p_d;
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size_t i = 0;
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config_values_t cv[] = {
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{ "webdav.activate", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
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{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
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};
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if (!p) return HANDLER_ERROR;
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p->config_storage = calloc(1, srv->config_context->used * sizeof(specific_config *));
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for (i = 0; i < srv->config_context->used; i++) {
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plugin_config *s;
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s = calloc(1, sizeof(plugin_config));
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cv[0].destination = &(s->enabled);
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p->config_storage[i] = s;
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if (0 != config_insert_values_global(srv, ((data_config *)srv->config_context->data[i])->value, cv)) {
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return HANDLER_ERROR;
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}
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}
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return HANDLER_GO_ON;
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}
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#define PATCH(x) \
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p->conf.x = s->x;
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static int mod_webdav_patch_connection(server *srv, connection *con, plugin_data *p) {
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size_t i, j;
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plugin_config *s = p->config_storage[0];
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PATCH(enabled);
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/* skip the first, the global context */
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for (i = 1; i < srv->config_context->used; i++) {
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data_config *dc = (data_config *)srv->config_context->data[i];
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s = p->config_storage[i];
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/* condition didn't match */
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if (!config_check_cond(srv, con, dc)) continue;
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/* merge config */
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for (j = 0; j < dc->value->used; j++) {
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data_unset *du = dc->value->data[j];
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if (buffer_is_equal_string(du->key, CONST_STR_LEN("webdav.activate"))) {
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PATCH(enabled);
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}
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}
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}
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return 0;
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}
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#undef PATCH
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URIHANDLER_FUNC(mod_webdav_uri_handler) {
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plugin_data *p = p_d;
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UNUSED(srv);
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if (con->uri.path->used == 0) return HANDLER_GO_ON;
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mod_webdav_patch_connection(srv, con, p);
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if (!p->conf.enabled) return HANDLER_GO_ON;
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switch (con->request.http_method) {
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case HTTP_METHOD_OPTIONS:
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/* we fake a little bit but it makes MS W2k happy and it let's us mount the volume */
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response_header_overwrite(srv, con, CONST_STR_LEN("DAV"), CONST_STR_LEN("1,2"));
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response_header_overwrite(srv, con, CONST_STR_LEN("MS-Author-Via"), CONST_STR_LEN("DAV"));
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response_header_insert(srv, con, CONST_STR_LEN("Allow"), CONST_STR_LEN("PROPFIND"));
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break;
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default:
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break;
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}
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/* not found */
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return HANDLER_GO_ON;
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}
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static int get_response_entry(server *srv, connection *con, plugin_data *p, buffer *b, const char *filename) {
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struct stat st;
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buffer_append_string(b,"<D:response xmlns:ns0=\"urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/\">\n");
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buffer_append_string(b,"<D:href>\n");
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buffer_append_string_buffer(b, con->uri.path);
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BUFFER_APPEND_SLASH(b);
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buffer_append_string(b, filename);
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buffer_append_string(b,"</D:href>\n");
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buffer_append_string(b,"<D:propstat>\n");
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/* we have to stat now */
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buffer_copy_string_buffer(p->tmp_buf, con->physical.path);
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BUFFER_APPEND_SLASH(p->tmp_buf);
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buffer_append_string(p->tmp_buf, filename);
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if (0 == stat(p->tmp_buf->ptr, &st)) {
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char ctime_buf[] = "2005-08-18T07:27:16Z";
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char mtime_buf[] = "Thu, 18 Aug 2005 07:27:16 GMT";
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size_t k;
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buffer_append_string(b,"<D:prop>\n");
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if (S_ISDIR(st.st_mode)) {
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buffer_append_string(b, "<D:resourcetype><D:collection/></D:resourcetype>"
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"<D:getcontenttype>httpd/unix-directory</D:getcontenttype>\n");
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}
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buffer_append_string(b, "<D:creationdate ns0:dt=\"dateTime.tz\">");
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strftime(ctime_buf, sizeof(ctime_buf), "%Y-%m-%dT%H:%M:%SZ", gmtime(&st.st_ctime));
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buffer_append_string(b, ctime_buf);
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buffer_append_string(b, "</D:creationdate>");
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buffer_append_string(b,"<D:getlastmodified ns0:dt=\"dateTime.rfc1123\">");
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strftime(mtime_buf, sizeof(mtime_buf), "%a, %d %b %Y %H:%M:%S GMT", gmtime(&st.st_mtime));
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buffer_append_string(b, mtime_buf);
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buffer_append_string(b, "</D:getlastmodified>");
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buffer_append_string(b,"<D:getcontentlength>");
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buffer_append_off_t(b, st.st_size);
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buffer_append_string(b, "</D:getcontentlength>");
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buffer_append_string(b,"<D:getcontentlanguage>");
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buffer_append_string(b, "en");
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buffer_append_string(b, "</D:getcontentlanguage>");
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for (k = 0; k < con->conf.mimetypes->used; k++) {
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data_string *ds = (data_string *)con->conf.mimetypes->data[k];
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if (ds->key->used == 0) continue;
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if (buffer_is_equal_right_len(p->tmp_buf, ds->key, ds->key->used - 1)) {
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buffer_append_string(b,"<D:contenttype>");
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buffer_append_string_buffer(b, ds->value);
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buffer_append_string(b, "</D:contenttype>");
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break;
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}
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}
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buffer_append_string(b,"</D:prop>\n");
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buffer_append_string(b,"<D:status>HTTP/1.1 200 OK</D:status>\n");
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} else {
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buffer_append_string(b,"<D:status>HTTP/1.1 404 Not Found</D:status>\n");
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}
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buffer_append_string(b,"</D:propstat>\n");
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buffer_append_string(b,"</D:response>\n");
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return 0;
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}
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URIHANDLER_FUNC(mod_webdav_subrequest_handler) {
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plugin_data *p = p_d;
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buffer *b;
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DIR *dir;
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data_string *ds;
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int depth = -1;
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UNUSED(srv);
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if (!p->conf.enabled) return HANDLER_GO_ON;
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/* physical path is setup */
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if (con->physical.path->used == 0) return HANDLER_GO_ON;
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switch (con->request.http_method) {
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case HTTP_METHOD_PROPFIND:
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/* they want to know the properties of the directory */
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if (NULL != (ds = (data_string *)array_get_element(con->request.headers, "Depth"))) {
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depth = strtol(ds->value->ptr, NULL, 10);
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}
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con->http_status = 207;
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response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("text/xml; charset=\"utf-8\""));
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b = chunkqueue_get_append_buffer(con->write_queue);
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buffer_copy_string(b,
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"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
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buffer_append_string(b,"<D:multistatus xmlns:D=\"DAV:\">\n");
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switch(depth) {
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case 0:
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/* Depth: 0 */
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get_response_entry(srv, con, p, b, "");
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break;
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case 1:
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if (NULL != (dir = opendir(con->physical.path->ptr))) {
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struct dirent *de;
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while(NULL != (de = readdir(dir))) {
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if (de->d_name[0] == '.' && de->d_name[1] == '\0') {
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/* ignore the currrent dir */
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} else {
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get_response_entry(srv, con, p, b, de->d_name);
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}
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}
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closedir(dir);
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}
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break;
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}
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buffer_append_string(b,"</D:multistatus>\n");
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con->file_finished = 1;
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return HANDLER_FINISHED;
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default:
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break;
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}
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/* not found */
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return HANDLER_GO_ON;
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}
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/* this function is called at dlopen() time and inits the callbacks */
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int mod_webdav_plugin_init(plugin *p) {
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p->version = LIGHTTPD_VERSION_ID;
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p->name = buffer_init_string("webdav");
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p->init = mod_webdav_init;
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p->handle_uri_clean = mod_webdav_uri_handler;
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p->handle_physical = mod_webdav_subrequest_handler;
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p->set_defaults = mod_webdav_set_defaults;
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p->cleanup = mod_webdav_free;
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p->data = NULL;
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return 0;
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}
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