Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help 
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
	  extended 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.

1.30.2				 Apr 12, 2025		 BSON_JSON_READER_T(3)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=bson_json_reader_t&sektion=3&manpath=FreeBSD+Ports+14.3.quarterly>

home | help