BSON_JSON_READER_T(3) libbson BSON_JSON_READER_T(3) Bulk JSON to BSON conversion SYNOPSIS #include <bson/bson.h> typedef struct _bson_json_reader_t bson_json_reader_t; typedef enum { BSON_JSON_ERROR_READ_CORRUPT_JS = 1, BSON_JSON_ERROR_READ_INVALID_PARAM, BSON_JSON_ERROR_READ_CB_FAILURE, } bson_json_error_code_t; DESCRIPTION The bson_json_reader_t structure is used for reading a sequence of JSON documents and transforming them to bson_t documents. This can often be useful if you want to perform bulk operations that are defined in a file containing JSON documents. TIP: bson_json_reader_t works upon JSON documents formatted in MongoDB ex- tended JSON format. EXAMPLE /* * Copyright 2009-present MongoDB, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* * This program will print each JSON document contained in the provided files * as a BSON string to STDOUT. */ #include <bson/bson.h> #include <stdlib.h> #include <stdio.h> int main (int argc, char *argv[]) { bson_json_reader_t *reader; bson_error_t error; const char *filename; bson_t doc = BSON_INITIALIZER; int i; int b; /* * Print program usage if no arguments are provided. */ if (argc == 1) { fprintf (stderr, "usage: %s FILE...\n", argv[0]); return 1; } /* * Process command line arguments expecting each to be a filename. */ for (i = 1; i < argc; i++) { filename = argv[i]; /* * Open the filename provided in command line arguments. */ if (0 == strcmp (filename, "-")) { reader = bson_json_reader_new_from_fd (STDIN_FILENO, false); } else { if (!(reader = bson_json_reader_new_from_file (filename, &error))) { fprintf ( stderr, "Failed to open \"%s\": %s\n", filename, error.message); continue; } } /* * Convert each incoming document to BSON and print to stdout. */ while ((b = bson_json_reader_read (reader, &doc, &error))) { if (b < 0) { fprintf (stderr, "Error in json parsing:\n%s\n", error.message); abort (); } if (fwrite (bson_get_data (&doc), 1, doc.len, stdout) != doc.len) { fprintf (stderr, "Failed to write to stdout, exiting.\n"); exit (1); } bson_reinit (&doc); } bson_json_reader_destroy (reader); bson_destroy (&doc); } return 0; } AUTHOR MongoDB, Inc COPYRIGHT 2009-present, MongoDB, Inc. 1.30.8 Aug 27, 2026 BSON_JSON_READER_T(3)
SYNOPSIS | DESCRIPTION | EXAMPLE | AUTHOR | COPYRIGHT
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