curl/src/tool_writeout_json.c

/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ***************************************************************************/
#include "tool_setup.h"

#define ENABLE_CURLX_PRINTF

/* use our own printf() functions */
#include "curlx.h"
#include "tool_cfgable.h"
#include "tool_writeout_json.h"
#include "tool_writeout.h"


void jsonWriteString(FILE *stream, const char *in)
{
  const char *i = in;
  const char *in_end = in + strlen(in);

  for(; i < in_end; i++) {
    switch(*i) {
    case '\\':
      fputs("\\\\", stream);
      break;
    case '\"':
      fputs("\\\"", stream);
      break;
    case '\b':
      fputs("\\b", stream);
      break;
    case '\f':
      fputs("\\f", stream);
      break;
    case '\n':
      fputs("\\n", stream);
      break;
    case '\r':
      fputs("\\r", stream);
      break;
    case '\t':
      fputs("\\t", stream);
      break;
    default:
      if (*i < 32) {
        fprintf(stream, "u%04x", *i);
      }
      else {
        fputc(*i, stream);
      }
      break;
    }
  }
}

void ourWriteOutJSON(FILE *stream, const struct writeoutvar mappings[],
                     struct per_transfer *per, CURLcode per_result)
{
  int i;

  fputs("{", stream);

  for(i = 0; mappings[i].name != NULL; i++) {
    if(mappings[i].writefunc &&
       mappings[i].writefunc(stream, &mappings[i], per, per_result, true))
      fputs(",", stream);
  }

  /* The variables are sorted in alphabetical order but as a special case
     curl_version (which is not actually a --write-out variable) is last. */
  fprintf(stream, "\"curl_version\":\"");
  jsonWriteString(stream, curl_version());
  fprintf(stream, "\"}");
}