xref: /third_party/nghttp2/src/comp_helper.c

/*
 * nghttp2 - HTTP/2 C Library
 *
 * Copyright (c) 2013 Tatsuhiro Tsujikawa
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#include "comp_helper.h"
#include <string.h>

static void dump_val(json_t *jent, const char *key, uint8_t *val, size_t len) {
  json_object_set_new(jent, key, json_pack("s#", val, len));
}

#define NGHTTP2_HD_ENTRY_OVERHEAD 32

json_t *dump_deflate_header_table(nghttp2_hd_deflater *deflater) {
  json_t *obj, *entries;
  size_t i;
  size_t len = nghttp2_hd_deflate_get_num_table_entries(deflater);

  obj = json_object();
  entries = json_array();
  /* The first index of dynamic table is 62 */
  for (i = 62; i <= len; ++i) {
    const nghttp2_nv *nv = nghttp2_hd_deflate_get_table_entry(deflater, i);
    json_t *outent = json_object();
    json_object_set_new(outent, "index", json_integer((json_int_t)i));
    dump_val(outent, "name", nv->name, nv->namelen);
    dump_val(outent, "value", nv->value, nv->valuelen);
    json_object_set_new(outent, "size",
                        json_integer((json_int_t)(nv->namelen + nv->valuelen +
                                                  NGHTTP2_HD_ENTRY_OVERHEAD)));
    json_array_append_new(entries, outent);
  }
  json_object_set_new(obj, "entries", entries);
  json_object_set_new(
      obj, "size",
      json_integer(
          (json_int_t)nghttp2_hd_deflate_get_dynamic_table_size(deflater)));
  json_object_set_new(
      obj, "max_size",
      json_integer(
          (json_int_t)nghttp2_hd_deflate_get_max_dynamic_table_size(deflater)));

  return obj;
}

json_t *dump_inflate_header_table(nghttp2_hd_inflater *inflater) {
  json_t *obj, *entries;
  size_t i;
  size_t len = nghttp2_hd_inflate_get_num_table_entries(inflater);

  obj = json_object();
  entries = json_array();
  /* The first index of dynamic table is 62 */
  for (i = 62; i <= len; ++i) {
    const nghttp2_nv *nv = nghttp2_hd_inflate_get_table_entry(inflater, i);
    json_t *outent = json_object();
    json_object_set_new(outent, "index", json_integer((json_int_t)i));
    dump_val(outent, "name", nv->name, nv->namelen);
    dump_val(outent, "value", nv->value, nv->valuelen);
    json_object_set_new(outent, "size",
                        json_integer((json_int_t)(nv->namelen + nv->valuelen +
                                                  NGHTTP2_HD_ENTRY_OVERHEAD)));
    json_array_append_new(entries, outent);
  }
  json_object_set_new(obj, "entries", entries);
  json_object_set_new(
      obj, "size",
      json_integer(
          (json_int_t)nghttp2_hd_inflate_get_dynamic_table_size(inflater)));
  json_object_set_new(
      obj, "max_size",
      json_integer(
          (json_int_t)nghttp2_hd_inflate_get_max_dynamic_table_size(inflater)));

  return obj;
}

json_t *dump_header(const uint8_t *name, size_t namelen, const uint8_t *value,
                    size_t valuelen) {
  json_t *nv_pair = json_object();
  char *cname = malloc(namelen + 1);
  if (cname == NULL) {
    return NULL;
  }
  memcpy(cname, name, namelen);
  cname[namelen] = '\0';
  json_object_set_new(nv_pair, cname, json_pack("s#", value, valuelen));
  free(cname);
  return nv_pair;
}

json_t *dump_headers(const nghttp2_nv *nva, size_t nvlen) {
  json_t *headers;
  size_t i;

  headers = json_array();
  for (i = 0; i < nvlen; ++i) {
    json_array_append_new(headers, dump_header(nva[i].name, nva[i].namelen,
                                               nva[i].value, nva[i].valuelen));
  }
  return headers;
}

void output_json_header(void) {
  printf("{\n"
         "  \"cases\":\n"
         "  [\n");
}

void output_json_footer(void) {
  printf("  ]\n"
         "}\n");
}