/* * Copyright (C) Igor Sysoev */ #include #include #include #define NGX_HTTP_DAV_OFF 2 typedef struct { ngx_uint_t methods; ngx_flag_t create_full_put_path; } ngx_http_dav_loc_conf_t; static ngx_int_t ngx_http_dav_handler(ngx_http_request_t *r); static void ngx_http_dav_put_handler(ngx_http_request_t *r); static ngx_int_t ngx_http_dav_error(ngx_http_request_t *, ngx_err_t err, ngx_int_t not_found, char *failed, u_char *path); static ngx_int_t ngx_http_dav_location(ngx_http_request_t *r, u_char *path); static void *ngx_http_dav_create_loc_conf(ngx_conf_t *cf); static char *ngx_http_dav_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_int_t ngx_http_dav_init(ngx_cycle_t *cycle); static ngx_conf_bitmask_t ngx_http_dav_methods_mask[] = { { ngx_string("off"), NGX_HTTP_DAV_OFF }, { ngx_string("put"), NGX_HTTP_PUT }, { ngx_string("delete"), NGX_HTTP_DELETE }, { ngx_string("mkcol"), NGX_HTTP_MKCOL }, { ngx_null_string, 0 } }; static ngx_command_t ngx_http_dav_commands[] = { { ngx_string("dav_methods"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, ngx_conf_set_bitmask_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_dav_loc_conf_t, methods), &ngx_http_dav_methods_mask }, { ngx_string("create_full_put_path"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_dav_loc_conf_t, create_full_put_path), NULL }, ngx_null_command }; ngx_http_module_t ngx_http_dav_module_ctx = { NULL, /* preconfiguration */ NULL, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_dav_create_loc_conf, /* create location configuration */ ngx_http_dav_merge_loc_conf /* merge location configuration */ }; ngx_module_t ngx_http_dav_module = { NGX_MODULE_V1, &ngx_http_dav_module_ctx, /* module context */ ngx_http_dav_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ ngx_http_dav_init, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_int_t ngx_http_dav_handler(ngx_http_request_t *r) { char *failed; ngx_int_t rc; ngx_str_t path; ngx_file_info_t fi; ngx_http_dav_loc_conf_t *dlcf; /* TODO: Win32 */ if (r->zero_in_uri) { return NGX_DECLINED; } dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module); if (!(r->method & dlcf->methods)) { return NGX_DECLINED; } switch (r->method) { case NGX_HTTP_PUT: if (r->uri.data[r->uri.len - 1] == '/') { return NGX_DECLINED; } if (r->headers_in.content_length_n < 0) { return NGX_HTTP_BAD_REQUEST; } r->request_body_in_file_only = 1; r->request_body_in_persistent_file = 1; r->request_body_delete_incomplete_file = 1; r->request_body_file_group_access = 1; r->request_body_file_log_level = 0; rc = ngx_http_read_client_request_body(r, ngx_http_dav_put_handler); if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { return rc; } return NGX_DONE; case NGX_HTTP_DELETE: if (r->headers_in.content_length_n > 0) { return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE; } rc = ngx_http_discard_body(r); if (rc != NGX_OK && rc != NGX_AGAIN) { return rc; } ngx_http_map_uri_to_path(r, &path, 0); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http delete filename: \"%s\"", path.data); if (ngx_file_info(path.data, &fi) != -1) { if (ngx_is_dir(&fi)) { if (r->uri.data[r->uri.len - 1] != '/' || r->headers_in.depth == NULL || r->headers_in.depth->value.len != sizeof("infinity") - 1 || ngx_strcmp(r->headers_in.depth->value.data, "infinity") != 0) { return NGX_HTTP_BAD_REQUEST; } if (ngx_delete_dir(path.data) != NGX_FILE_ERROR) { return NGX_HTTP_NO_CONTENT; } failed = ngx_delete_dir_n; } else { if (r->uri.data[r->uri.len - 1] == '/') { return NGX_HTTP_BAD_REQUEST; } if (r->headers_in.depth && r->headers_in.depth->value.len == 1 && r->headers_in.depth->value.data[0] == '1') { return NGX_HTTP_BAD_REQUEST; } if (ngx_delete_file(path.data) != NGX_FILE_ERROR) { return NGX_HTTP_NO_CONTENT; } failed = ngx_delete_file_n; } } else { failed = ngx_file_info_n; } return ngx_http_dav_error(r, ngx_errno, NGX_HTTP_NOT_FOUND, failed, path.data); case NGX_HTTP_MKCOL: if (r->uri.data[r->uri.len - 1] != '/') { return NGX_DECLINED; } if (r->headers_in.content_length_n > 0) { return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE; } rc = ngx_http_discard_body(r); if (rc != NGX_OK && rc != NGX_AGAIN) { return rc; } ngx_http_map_uri_to_path(r, &path, 0); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http mkcol path: \"%s\"", path.data); if (ngx_create_dir(path.data) != NGX_FILE_ERROR) { if (ngx_http_dav_location(r, path.data) != NGX_OK) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } return NGX_HTTP_CREATED; } return ngx_http_dav_error(r, ngx_errno, NGX_HTTP_CONFLICT, ngx_create_dir_n, path.data); } return NGX_DECLINED; } static void ngx_http_dav_put_handler(ngx_http_request_t *r) { ngx_err_t err; ngx_str_t *temp, path; ngx_uint_t status; ngx_file_info_t fi; ngx_http_dav_loc_conf_t *dlcf; ngx_http_map_uri_to_path(r, &path, 0); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http put filename: \"%s\"", path.data); temp = &r->request_body->temp_file->file.name; if (ngx_file_info(path.data, &fi) == -1) { status = NGX_HTTP_CREATED; } else { status = NGX_HTTP_NO_CONTENT; } if (ngx_is_dir(&fi)) { ngx_http_finalize_request(r, NGX_HTTP_CONFLICT); return; } if (ngx_rename_file(temp->data, path.data) != NGX_FILE_ERROR) { goto ok; } err = ngx_errno; if (err == NGX_ENOENT) { dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module); if (dlcf->create_full_put_path) { err = ngx_create_full_path(path.data); if (err == 0) { if (ngx_rename_file(temp->data, path.data) != NGX_FILE_ERROR) { goto ok; } err = ngx_errno; } } } #if (NGX_WIN32) if (err == NGX_EEXIST) { if (ngx_win32_rename_file(temp, &path, r->pool) != NGX_ERROR) { if (ngx_rename_file(temp->data, path.data) != NGX_FILE_ERROR) { goto ok; } } err = ngx_errno; } #endif ngx_http_finalize_request(r, ngx_http_dav_error(r, err, NGX_HTTP_CONFLICT, ngx_rename_file_n, path.data)); return; ok: if (status == NGX_HTTP_CREATED) { if (ngx_http_dav_location(r, path.data) != NGX_OK) { ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); return; } } r->headers_out.status = status; r->header_only = 1; ngx_http_finalize_request(r, ngx_http_send_header(r)); return; } static ngx_int_t ngx_http_dav_error(ngx_http_request_t *r, ngx_err_t err, ngx_int_t not_found, char *failed, u_char *path) { ngx_int_t rc; ngx_uint_t level; if (err == NGX_ENOENT || err == NGX_ENOTDIR || err == NGX_ENAMETOOLONG) { level = NGX_LOG_ERR; rc = not_found; } else if (err == NGX_EACCES || err == NGX_EPERM) { level = NGX_LOG_ERR; rc = NGX_HTTP_FORBIDDEN; } else if (err == NGX_EEXIST) { level = NGX_LOG_ERR; rc = NGX_HTTP_NOT_ALLOWED; } else if (err == NGX_ENOSPC) { level = NGX_LOG_CRIT; rc = NGX_HTTP_INSUFFICIENT_STORAGE; } else { level = NGX_LOG_CRIT; rc = NGX_HTTP_INTERNAL_SERVER_ERROR; } ngx_log_error(level, r->connection->log, err, "%s \"%s\" failed", failed, path); return rc; } static ngx_int_t ngx_http_dav_location(ngx_http_request_t *r, u_char *path) { u_char *location; ngx_http_core_loc_conf_t *clcf; r->headers_out.location = ngx_palloc(r->pool, sizeof(ngx_table_elt_t)); if (r->headers_out.location == NULL) { return NGX_ERROR; } clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (!clcf->alias && clcf->root_lengths == NULL) { location = path + clcf->root.len; } else { location = ngx_palloc(r->pool, r->uri.len); if (location == NULL) { return NGX_ERROR; } ngx_memcpy(location, r->uri.data, r->uri.len); } /* * we do not need to set the r->headers_out.location->hash and * r->headers_out.location->key fields */ r->headers_out.location->value.len = r->uri.len; r->headers_out.location->value.data = location; return NGX_OK; } static void * ngx_http_dav_create_loc_conf(ngx_conf_t *cf) { ngx_http_dav_loc_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_dav_loc_conf_t)); if (conf == NULL) { return NGX_CONF_ERROR; } /* * set by ngx_pcalloc(): * * conf->methods = 0; */ conf->create_full_put_path = NGX_CONF_UNSET; return conf; } static char * ngx_http_dav_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_dav_loc_conf_t *prev = parent; ngx_http_dav_loc_conf_t *conf = child; ngx_conf_merge_bitmask_value(conf->methods, prev->methods, (NGX_CONF_BITMASK_SET|NGX_HTTP_DAV_OFF)); ngx_conf_merge_value(conf->create_full_put_path, prev->create_full_put_path, 0); return NGX_CONF_OK; } static ngx_int_t ngx_http_dav_init(ngx_cycle_t *cycle) { ngx_http_handler_pt *h; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module); h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers); if (h == NULL) { return NGX_ERROR; } *h = ngx_http_dav_handler; return NGX_OK; }