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.TH "BSON_JSON_READER_T" "3" "Feb 22, 2024" "1.26.0" "libbson"
.sp
Bulk JSON to BSON conversion
.SH SYNOPSIS
.INDENT 0.0
.INDENT 3.5
.sp
.EX
#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;
.EE
.UNINDENT
.UNINDENT
.SH DESCRIPTION
.sp
The \fI\%bson_json_reader_t\fP structure is used for reading a sequence of JSON documents and transforming them to \fI\%bson_t\fP documents.
.sp
This can often be useful if you want to perform bulk operations that are defined in a file containing JSON documents.
.sp
\fBTIP:\fP
.INDENT 0.0
.INDENT 3.5
\fI\%bson_json_reader_t\fP works upon JSON documents formatted in \fI\%MongoDB extended JSON\fP format.
.UNINDENT
.UNINDENT
.SH EXAMPLE
.INDENT 0.0
.INDENT 3.5
.sp
.EX
/*
 * Copyright 2013 MongoDB, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the \(dqLicense\(dq);
 * 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 \(dqAS IS\(dq 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, \(dqusage: %s FILE...\en\(dq, 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, \(dq\-\(dq)) {
         reader = bson_json_reader_new_from_fd (STDIN_FILENO, false);
      } else {
         if (!(reader = bson_json_reader_new_from_file (filename, &error))) {
            fprintf (
               stderr, \(dqFailed to open \e\(dq%s\e\(dq: %s\en\(dq, 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, \(dqError in json parsing:\en%s\en\(dq, error.message);
            abort ();
         }

         if (fwrite (bson_get_data (&doc), 1, doc.len, stdout) != doc.len) {
            fprintf (stderr, \(dqFailed to write to stdout, exiting.\en\(dq);
            exit (1);
         }
         bson_reinit (&doc);
      }

      bson_json_reader_destroy (reader);
      bson_destroy (&doc);
   }

   return 0;
}
.EE
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.UNINDENT
.SH AUTHOR
MongoDB, Inc
.SH COPYRIGHT
2017-present, MongoDB, Inc
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