diff options
Diffstat (limited to 'storage/mroonga/udf/mrn_udf_snippet_html.cpp')
| -rw-r--r-- | storage/mroonga/udf/mrn_udf_snippet_html.cpp | 444 |
1 files changed, 444 insertions, 0 deletions
diff --git a/storage/mroonga/udf/mrn_udf_snippet_html.cpp b/storage/mroonga/udf/mrn_udf_snippet_html.cpp new file mode 100644 index 00000000..311c91bf --- /dev/null +++ b/storage/mroonga/udf/mrn_udf_snippet_html.cpp @@ -0,0 +1,444 @@ +/* -*- c-basic-offset: 2; indent-tabs-mode: nil -*- */ +/* + Copyright(C) 2015-2017 Kouhei Sutou <kou@clear-code.com> + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA +*/ + +#include <mrn_mysql.h> +#include <mrn_mysql_compat.h> +#include <mrn_err.h> +#include <mrn_encoding.hpp> +#include <mrn_windows.hpp> +#include <mrn_table.hpp> +#include <mrn_macro.hpp> +#include <mrn_database_manager.hpp> +#include <mrn_context_pool.hpp> +#include <mrn_variables.hpp> +#include <mrn_query_parser.hpp> +#include <mrn_current_thread.hpp> + +MRN_BEGIN_DECLS + +extern mrn::DatabaseManager *mrn_db_manager; +extern mrn::ContextPool *mrn_context_pool; + +typedef struct st_mrn_snippet_html_info +{ + grn_ctx *ctx; + grn_obj *db; + bool use_shared_db; + grn_obj *snippet; + String result_str; + struct { + bool used; + grn_obj *table; + grn_obj *default_column; + } query_mode; +} mrn_snippet_html_info; + +static my_bool mrn_snippet_html_prepare(mrn_snippet_html_info *info, + UDF_ARGS *args, + char *message, + grn_obj **snippet) +{ + MRN_DBUG_ENTER_FUNCTION(); + + grn_ctx *ctx = info->ctx; + int flags = GRN_SNIP_SKIP_LEADING_SPACES; + unsigned int width = 200; + unsigned int max_n_results = 3; + const char *open_tag = "<span class=\"keyword\">"; + const char *close_tag = "</span>"; + grn_snip_mapping *mapping = GRN_SNIP_MAPPING_HTML_ESCAPE; + grn_obj *expr = NULL; + String *result_str = &(info->result_str); + + *snippet = NULL; + + mrn::encoding::set_raw(ctx, system_charset_info); + if (!(system_charset_info->state & (MY_CS_BINSORT | MY_CS_CSSORT))) { + flags |= GRN_SNIP_NORMALIZE; + } + + *snippet = grn_snip_open(ctx, flags, + width, max_n_results, + open_tag, strlen(open_tag), + close_tag, strlen(close_tag), + mapping); + if (ctx->rc != GRN_SUCCESS) { + if (message) { + snprintf(message, MYSQL_ERRMSG_SIZE, + "mroonga_snippet_html(): failed to open grn_snip: <%s>", + ctx->errbuf); + } + goto error; + } + + if (info->query_mode.used) { + if (!info->query_mode.table) { + grn_obj *short_text; + short_text = grn_ctx_at(info->ctx, GRN_DB_SHORT_TEXT); + info->query_mode.table = grn_table_create(info->ctx, + NULL, 0, NULL, + GRN_TABLE_HASH_KEY, + short_text, + NULL); + } + if (!info->query_mode.default_column) { + info->query_mode.default_column = + grn_obj_column(info->ctx, + info->query_mode.table, + GRN_COLUMN_NAME_KEY, + GRN_COLUMN_NAME_KEY_LEN); + } + + grn_obj *record = NULL; + GRN_EXPR_CREATE_FOR_QUERY(info->ctx, info->query_mode.table, expr, record); + if (!expr) { + if (message) { + snprintf(message, MYSQL_ERRMSG_SIZE, + "mroonga_snippet_html(): " + "failed to create expression: <%s>", + ctx->errbuf); + } + goto error; + } + + mrn::QueryParser query_parser(info->ctx, + current_thd, + expr, + info->query_mode.default_column, + 0, + NULL); + grn_rc rc = query_parser.parse(args->args[1], args->lengths[1]); + if (rc != GRN_SUCCESS) { + if (message) { + snprintf(message, MYSQL_ERRMSG_SIZE, + "mroonga_snippet_html(): " + "failed to parse query: <%s>", + ctx->errbuf); + } + goto error; + } + + rc = grn_expr_snip_add_conditions(info->ctx, + expr, + *snippet, + 0, + NULL, NULL, + NULL, NULL); + if (rc != GRN_SUCCESS) { + if (message) { + snprintf(message, MYSQL_ERRMSG_SIZE, + "mroonga_snippet_html(): " + "failed to add conditions: <%s>", + ctx->errbuf); + } + goto error; + } + } else { + unsigned int i; + for (i = 1; i < args->arg_count; ++i) { + if (!args->args[i]) { + continue; + } + grn_rc rc = grn_snip_add_cond(ctx, *snippet, + args->args[i], args->lengths[i], + NULL, 0, + NULL, 0); + if (rc != GRN_SUCCESS) { + if (message) { + snprintf(message, MYSQL_ERRMSG_SIZE, + "mroonga_snippet_html(): " + "failed to add a condition to grn_snip: <%s>", + ctx->errbuf); + } + goto error; + } + } + } + + result_str->set_charset(system_charset_info); + DBUG_RETURN(FALSE); + +error: + if (expr) { + grn_obj_close(ctx, expr); + } + if (*snippet) { + grn_obj_close(ctx, *snippet); + } + DBUG_RETURN(TRUE); +} + +MRN_API my_bool mroonga_snippet_html_init(UDF_INIT *init, + UDF_ARGS *args, + char *message) +{ + MRN_DBUG_ENTER_FUNCTION(); + + mrn_snippet_html_info *info = NULL; + + init->ptr = NULL; + + if (args->arg_count < 1) { + snprintf(message, MYSQL_ERRMSG_SIZE, + "mroonga_snippet_html(): wrong number of arguments: %u for 1+", + args->arg_count); + goto error; + } + + + for (unsigned int i = 0; i < args->arg_count; ++i) { + switch (args->arg_type[i]) { + case STRING_RESULT: + /* OK */ + break; + case REAL_RESULT: + snprintf(message, MYSQL_ERRMSG_SIZE, + "mroonga_snippet_html(): all arguments must be string: " + "<%u>=<%g>", + i, *((double *)(args->args[i]))); + goto error; + break; + case INT_RESULT: + snprintf(message, MYSQL_ERRMSG_SIZE, + "mroonga_snippet_html(): all arguments must be string: " + "<%u>=<%lld>", + i, *((longlong *)(args->args[i]))); + goto error; + break; + default: + snprintf(message, MYSQL_ERRMSG_SIZE, + "mroonga_snippet_html(): all arguments must be string: <%u>", + i); + goto error; + break; + } + } + + init->maybe_null = 1; + + info = (mrn_snippet_html_info *)mrn_my_malloc(sizeof(mrn_snippet_html_info), + MYF(MY_WME | MY_ZEROFILL)); + if (!info) { + snprintf(message, MYSQL_ERRMSG_SIZE, + "mroonga_snippet_html(): failed to allocate memory"); + goto error; + } + + info->ctx = mrn_context_pool->pull(); + { + const char *current_db_path = MRN_THD_DB_PATH(current_thd); + const char *action; + if (current_db_path) { + action = "open database"; + mrn::Database *db; + int error = mrn_db_manager->open(current_db_path, &db); + if (error == 0) { + info->db = db->get(); + grn_ctx_use(info->ctx, info->db); + info->use_shared_db = true; + } + } else { + action = "create anonymous database"; + info->db = grn_db_create(info->ctx, NULL, NULL); + info->use_shared_db = false; + } + if (!info->db) { + sprintf(message, + "mroonga_snippet_html(): failed to %s: %s", + action, + info->ctx->errbuf); + goto error; + } + } + + info->query_mode.used = FALSE; + + if (args->arg_count == 2 && + args->attribute_lengths[1] == strlen("query") && + strncmp(args->attributes[1], "query", strlen("query")) == 0) { + info->query_mode.used = TRUE; + info->query_mode.table = NULL; + info->query_mode.default_column = NULL; + } + + { + bool all_keywords_are_constant = TRUE; + for (unsigned int i = 1; i < args->arg_count; ++i) { + if (!args->args[i]) { + all_keywords_are_constant = FALSE; + break; + } + } + + if (all_keywords_are_constant) { + if (mrn_snippet_html_prepare(info, args, message, &(info->snippet))) { + goto error; + } + } else { + info->snippet = NULL; + } + } + + init->ptr = (char *)info; + + DBUG_RETURN(FALSE); + +error: + if (info) { + if (!info->use_shared_db) { + grn_obj_close(info->ctx, info->db); + } + mrn_context_pool->release(info->ctx); + my_free(info); + } + DBUG_RETURN(TRUE); +} + +MRN_API char *mroonga_snippet_html(UDF_INIT *init, + UDF_ARGS *args, + char *result, + unsigned long *length, + char *is_null, + char *error) +{ + MRN_DBUG_ENTER_FUNCTION(); + + mrn_snippet_html_info *info = + reinterpret_cast<mrn_snippet_html_info *>(init->ptr); + + grn_ctx *ctx = info->ctx; + grn_obj *snippet = info->snippet; + String *result_str = &(info->result_str); + + if (!args->args[0]) { + *is_null = 1; + DBUG_RETURN(NULL); + } + + if (!snippet) { + if (mrn_snippet_html_prepare(info, args, NULL, &snippet)) { + goto error; + } + } + + { + char *target = args->args[0]; + unsigned int target_length = args->lengths[0]; + + unsigned int n_results, max_tagged_length; + { + grn_rc rc = grn_snip_exec(ctx, snippet, target, target_length, + &n_results, &max_tagged_length); + if (rc != GRN_SUCCESS) { + my_printf_error(ER_MRN_ERROR_FROM_GROONGA_NUM, + ER_MRN_ERROR_FROM_GROONGA_STR, MYF(0), ctx->errbuf); + goto error; + } + } + + *is_null = 0; + result_str->length(0); + + { + const char *start_tag = "<div class=\"snippet\">"; + const char *end_tag = "</div>"; + size_t start_tag_length = strlen(start_tag); + size_t end_tag_length = strlen(end_tag); + unsigned int max_length_per_snippet = + start_tag_length + end_tag_length + max_tagged_length; + if (result_str->reserve(max_length_per_snippet * n_results)) { + my_error(ER_OUT_OF_RESOURCES, MYF(0), HA_ERR_OUT_OF_MEM); + goto error; + } + + for (unsigned int i = 0; i < n_results; ++i) { + result_str->q_append(start_tag, start_tag_length); + + unsigned int result_length; + grn_rc rc = + grn_snip_get_result(ctx, snippet, i, + (char *)result_str->ptr() + result_str->length(), + &result_length); + if (rc) { + my_printf_error(ER_MRN_ERROR_FROM_GROONGA_NUM, + ER_MRN_ERROR_FROM_GROONGA_STR, MYF(0), ctx->errbuf); + goto error; + } + result_str->length(result_str->length() + result_length); + + result_str->q_append(end_tag, end_tag_length); + } + } + + if (!info->snippet) { + grn_rc rc = grn_obj_close(ctx, snippet); + if (rc != GRN_SUCCESS) { + my_printf_error(ER_MRN_ERROR_FROM_GROONGA_NUM, + ER_MRN_ERROR_FROM_GROONGA_STR, MYF(0), ctx->errbuf); + goto error; + } + } + } + + *length = result_str->length(); + DBUG_RETURN((char *)result_str->ptr()); + +error: + if (!info->snippet && snippet) { + grn_obj_close(ctx, snippet); + } + + *is_null = 1; + *error = 1; + + DBUG_RETURN(NULL); +} + +MRN_API void mroonga_snippet_html_deinit(UDF_INIT *init) +{ + MRN_DBUG_ENTER_FUNCTION(); + + mrn_snippet_html_info *info = + reinterpret_cast<mrn_snippet_html_info *>(init->ptr); + if (!info) { + DBUG_VOID_RETURN; + } + + if (info->snippet) { + grn_obj_close(info->ctx, info->snippet); + } + if (info->query_mode.used) { + if (info->query_mode.default_column) { + grn_obj_close(info->ctx, info->query_mode.default_column); + } + if (info->query_mode.table) { + grn_obj_close(info->ctx, info->query_mode.table); + } + } + MRN_STRING_FREE(info->result_str); + if (!info->use_shared_db) { + grn_obj_close(info->ctx, info->db); + } + mrn_context_pool->release(info->ctx); + my_free(info); + + DBUG_VOID_RETURN; +} + +MRN_END_DECLS |