NAME

       bson_json_reader_t - Bulk JSON to BSON conversion

SYNOPSIS

       #include <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.

       NOTE
              bson_json_reader_t  works  upon  JSON  documents formatted in MongoDB extended JSON
              format.

EXAMPLE

       /*
        * Copyright 2013 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.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;
       }

COLOPHON

       This    page    is    part    of    libbson.     Please     report     any     bugs     at
       https://jira.mongodb.org/browse/CDRIVER.