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/connlink/test1/ui/old/gsearch_proxy.php

<?php
/* ============================================================
 * SIMON · Google Custom Search Proxy
 * ------------------------------------------------------------
 * Upload to: /htdocs/connlink/test1/ui/gsearch_proxy.php
 * Reached at: https://www.gaylordsinclair.com/connlink/test1/ui/gsearch_proxy.php?q=QUERY
 *
 * Keeps GOOGLE_CSE_KEY and GOOGLE_CSE_CX on the server (secrets.php).
 * Caches each unique query for CACHE_TTL seconds to protect the
 * free 100/day quota. Normalizes the response to a compact shape:
 *   { query, results:[{title, snippet, url, source, image}], meta:{...} }
 *
 * Query params:
 *   q       : query string (required)
 *   num     : 1..10 results  (default 10)
 *   start   : 1..91 pagination offset (default 1)
 *   safe    : off | active  (default off)
 *   lr      : language restrict, e.g. lang_en
 *   gl      : country code, e.g. us
 * ============================================================ */

header('Content-Type: application/json; charset=utf-8');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, OPTIONS');

if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') { http_response_code(204); exit; }

$q = trim((string)($_GET['q'] ?? ''));
if ($q === '') {
  echo json_encode(['ok'=>false, 'err'=>'missing q']);
  exit;
}

/* ----- load secrets (tries /private/secure/ first, then local) ----- */
$secrets = [];
$secretPaths = [
  dirname($_SERVER['DOCUMENT_ROOT'] ?? '') . '/private/secure/secrets.php',
  __DIR__ . '/secrets.php',
];
foreach ($secretPaths as $sp) {
  if ($sp && file_exists($sp)) {
    $s = @include $sp;
    if (is_array($s)) { $secrets = $s; break; }
  }
}
if (!is_array($secrets) || empty($secrets['GOOGLE_CSE_KEY']) || empty($secrets['GOOGLE_CSE_CX'])) {
  http_response_code(200);   // non-fatal: SIMON can still use DuckDuckGo + Wikipedia
  echo json_encode([
    'ok'      => false,
    'err'     => 'Google CSE not configured. Add GOOGLE_CSE_KEY and GOOGLE_CSE_CX to secrets.php.',
    'query'   => $q,
    'results' => [],
  ]);
  exit;
}

$KEY = $secrets['GOOGLE_CSE_KEY'];
$CX  = $secrets['GOOGLE_CSE_CX'];

$num   = max(1, min(10, intval($_GET['num']   ?? 10)));
$start = max(1, min(91, intval($_GET['start'] ?? 1)));
$safe  = in_array(($_GET['safe'] ?? 'off'), ['off','active'], true) ? $_GET['safe'] : 'off';
$lr    = preg_replace('/[^A-Za-z0-9_]/','', (string)($_GET['lr'] ?? ''));
$gl    = preg_replace('/[^a-z]/',       '', strtolower((string)($_GET['gl'] ?? '')));

$params = [
  'key'   => $KEY,
  'cx'    => $CX,
  'q'     => $q,
  'num'   => $num,
  'start' => $start,
  'safe'  => $safe,
];
if ($lr !== '') $params['lr'] = $lr;
if ($gl !== '') $params['gl'] = $gl;

$upstream = 'https://www.googleapis.com/customsearch/v1?' . http_build_query($params);

/* ----- cache ----- */
$CACHE_DIR = __DIR__ . '/cache';
$CACHE_TTL = 600;   // 10 minutes
if (!is_dir($CACHE_DIR)) { @mkdir($CACHE_DIR, 0755, true); }
$ckey  = sha1($upstream);
$cfile = $CACHE_DIR . '/gsearch_' . $ckey . '.json';
if (file_exists($cfile) && (time() - filemtime($cfile)) < $CACHE_TTL) {
  header('X-SIMON-Cache: HIT');
  readfile($cfile);
  exit;
}

/* ----- fetch ----- */
$ch = curl_init($upstream);
curl_setopt_array($ch, [
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_TIMEOUT        => 12,
  CURLOPT_HTTPHEADER     => [
    'Accept: application/json',
    'User-Agent: SIMON/1.0 (+https://www.gaylordsinclair.com)',
  ],
]);
$resp = curl_exec($ch);
$http = curl_getinfo($ch, CURLINFO_HTTP_CODE);
$err  = curl_error($ch);
curl_close($ch);

if ($resp === false || $http >= 500) {
  if (file_exists($cfile)) { header('X-SIMON-Cache: STALE'); readfile($cfile); exit; }
  http_response_code(502);
  echo json_encode(['ok'=>false,'err'=>'upstream failed','detail'=>$err,'status'=>$http,'query'=>$q]);
  exit;
}

$raw = json_decode($resp, true);
if (!is_array($raw)) {
  http_response_code(502);
  echo json_encode(['ok'=>false,'err'=>'bad upstream json','query'=>$q]);
  exit;
}

/* ----- normalize ----- */
$items = [];
if (!empty($raw['items']) && is_array($raw['items'])) {
  foreach ($raw['items'] as $it) {
    $img = '';
    if (!empty($it['pagemap']['cse_image'][0]['src'])) {
      $img = $it['pagemap']['cse_image'][0]['src'];
    } elseif (!empty($it['pagemap']['cse_thumbnail'][0]['src'])) {
      $img = $it['pagemap']['cse_thumbnail'][0]['src'];
    }
    $items[] = [
      'title'   => $it['title']           ?? '',
      'snippet' => $it['snippet']         ?? ($it['htmlSnippet'] ?? ''),
      'url'     => $it['link']            ?? '',
      'source'  => $it['displayLink']     ?? '',
      'image'   => $img,
    ];
  }
}

$out = [
  'ok'      => true,
  'query'   => $q,
  'results' => $items,
  'meta'    => [
    'total'     => (int)($raw['searchInformation']['totalResults'] ?? 0),
    'time'      => (float)($raw['searchInformation']['searchTime'] ?? 0),
    'next'      => $raw['queries']['nextPage'][0]['startIndex']  ?? null,
  ],
];

$encoded = json_encode($out, JSON_UNESCAPED_SLASHES|JSON_UNESCAPED_UNICODE);
@file_put_contents($cfile, $encoded, LOCK_EX);

header('X-SIMON-Cache: MISS');
echo $encoded;

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