demo.php.txt

google的gdata api包

<?php

/* Our Google Base API developer key. */
$developerKey = "REPLACE WITH YOUR DEVELOPER KEY";

/* The items feed URL, used for queries, insertions and batch commands. */
$itemsFeedURL = "http://www.google.com/base/feeds/items";

/* Parsed recipe entries from a query. */
$parsedEntries = array();

/* Are we currently parsing an XML ENTRY tag? */
$foundEntry = false;

/* Current XML element being processed. */
$curElement = "";

/* Types of cuisine the user may select when inserting a recipe. */
$cuisines = array('African', 'American', 'Asian', 'Caribbean', 'Chinese',
  'French', 'Greek', 'Indian', 'Italian', 'Japanese', 'Jewish', 
  'Mediterranean', 'Mexican', 'Middle Eastern', 'Moroccan', 
  'North American', 'Spanish', 'Thai', 'Vietnamese', 'Other');

/**
 * Creates the XML content used to insert a new recipe.
 */
function buildInsertXML() {
  $result = "<?xml version='1.0'?>" . "\n";
  $result .= "<entry xmlns='http://www.w3.org/2005/Atom'" .
    " xmlns:g='http://base.google.com/ns/1.0'>" . "\n";
  $result .= "<category scheme='http://base.google.com/categories/itemtypes'" .
    " term='Recipes'/>" . "\n";
  $result .= "<title type='text'>" . $_POST['recipe_title'] . "</title>" .
    "\n";
  $result .= "<g:cuisine>" . $_POST['cuisine'] . "</g:cuisine>" . "\n";
  $result .= "<g:item_type type='text'>Recipes</g:item_type>" . "\n";
  $result .= "<g:cooking_time type='intUnit'>" . $_POST['time_val'] .
             " " . $_POST['time_units'] . "</g:cooking_time>" . "\n";
  $result .= "<g:main_ingredient type='text'>" . $_POST['main_ingredient'] .
    "</g:main_ingredient>" . "\n";
  $result .= "<g:serving_count type='number'>" . $_POST['serves'] .
    "</g:serving_count>" . "\n";
  $result .= "<content>" . $_POST['recipe_text'] . "</content>" . "\n";
  $result .= "</entry>" . "\n";

  return $result;
}

/**
 * Creates the XML content used to perform a batch delete.
 */
function buildBatchXML() {
  $counter = 0;

  $result =  '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
  $result .= '<feed xmlns="http://www.w3.org/2005/Atom"' . "\n";
  $result .= ' xmlns:g="http://base.google.com/ns/1.0"' . "\n";
  $result .= ' xmlns:batch="http://schemas.google.com/gdata/batch">' . "\n";
  foreach($_POST as $key => $value) {
    if(substr($key, 0, 5) == "link_") {
      $counter++;

      $result .= '<entry>' . "\n";
      $result .= '<id>' . $value . '</id>' . "\n";
      $result .= '<batch:operation type="delete"/>' . "\n";
      $result .= '<batch:id>' . $counter . '</batch:id>' . "\n";
      $result .= '</entry>' . "\n";
    }
  }
  $result .= '</feed>' . "\n";

  return $result;
}

/**
 * Exchanges the given single-use token for a session
 * token using AuthSubSessionToken, and returns the result.
 */
function exchangeToken($token) {
  $ch = curl_init();    /* Create a CURL handle. */

  curl_setopt($ch, CURLOPT_URL,
    "https://www.google.com/accounts/AuthSubSessionToken");
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_FAILONERROR, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Authorization: AuthSub token="' . $token . '"'
  ));

  $result = curl_exec($ch);  /* Execute the HTTP command. */
  curl_close($ch);

  $splitStr = split("=", $result);
  return trim($splitStr[1]);
}

/**
 * Performs a query for all of the user's items using the
 * items feed, then parses the resulting XML with the
 * startElement, endElement and characterData functions
 * (below).
 */
function getItems($token) {
  $ch = curl_init();    /* Create a CURL handle. */
  global $developerKey, $itemsFeedURL;

  curl_setopt($ch, CURLOPT_URL, $itemsFeedURL . "?");
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/atom+xml',
    'Authorization: AuthSub token="' . trim($token) . '"',
    'X-Google-Key: key=' . $developerKey
  ));

  $result = curl_exec($ch);  /* Execute the HTTP command. */
  curl_close($ch);

  /* Parse the resulting XML. */
  $xml_parser = xml_parser_create();
  xml_set_element_handler($xml_parser, "startElement", "endElement");
  xml_set_character_data_handler($xml_parser, "characterData"); 
  xml_parse($xml_parser, $result);
  xml_parser_free($xml_parser);
}

/**
 * Inserts a new recipe by performing an HTTP POST to the
 * items feed.
 */
function postItem() {
  $ch = curl_init();    /* Create a CURL handle. */
  global $developerKey, $itemsFeedURL;

  /* Set cURL options. */
  curl_setopt($ch, CURLOPT_URL, $itemsFeedURL);
  curl_setopt($ch, CURLOPT_POST, true);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_FAILONERROR, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Authorization: AuthSub token="' . $_POST['token'] . '"',
    'X-Google-Key: key=' . $developerKey,
    'Content-Type: application/atom+xml'
  ));
  curl_setopt($ch, CURLOPT_POSTFIELDS, buildInsertXML());

  $result = curl_exec($ch);  /* Execute the HTTP request. */
  curl_close($ch);           /* Close the cURL handle. */

  return $result;
}

/**
 * Updates an existing recipe by performing an HTTP PUT
 * on its feed URI, using the updated values a PUT data.
 */
function updateItem() {
  $ch = curl_init();    /* Create a CURL handle. */
  global $developerKey;

  /* Prepare the data for HTTP PUT. */
  $putString = buildInsertXML();
  $putData = tmpfile();
  fwrite($putData, $putString);
  fseek($putData, 0);

  /* Set cURL options. */
  curl_setopt($ch, CURLOPT_URL, $_POST['link']);
  curl_setopt($ch, CURLOPT_PUT, true);
  curl_setopt($ch, CURLOPT_INFILE, $putData);
  curl_setopt($ch, CURLOPT_INFILESIZE, strlen($putString));
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_FAILONERROR, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Authorization: AuthSub token="' . $_POST['token'] . '"',
    'X-Google-Key: key=' . $developerKey,
    'Content-Type: application/atom+xml'
  ));

  $result = curl_exec($ch);  /* Execute the HTTP request. */
  fclose($putData);          /* Close and delete the temp file. */
  curl_close($ch);           /* Close the cURL handle. */

  return $result;
}

/**
 * Deletes a recipe by performing an HTTP DELETE (a custom
 * cURL request) on its feed URI.
 */
function deleteItem() {
  $ch = curl_init();
  global $developerKey;

    /* Set cURL options. */
  curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "DELETE");
  curl_setopt($ch, CURLOPT_URL, $_POST['link']);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_FAILONERROR, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Authorization: AuthSub token="' . $_POST['token'] . '"',
    'X-Google-Key: key=' . $developerKey
  ));

  $result = curl_exec($ch);  /* Execute the HTTP request. */
  curl_close($ch);           /* Close the cURL handle.    */

  return $result;
}

/**
 * Deletes all recipes by performing an HTTP POST to the
 * batch URI.
 */
function batchDelete() {
  $ch = curl_init();    /* Create a CURL handle. */
  global $developerKey, $itemsFeedURL;

  /* Set cURL options. */
  curl_setopt($ch, CURLOPT_URL, $itemsFeedURL . "/batch");
  curl_setopt($ch, CURLOPT_POST, true);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_FAILONERROR, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Authorization: AuthSub token="' . $_POST['token'] . '"',
    'X-Google-Key: key=' . $developerKey,
    'Content-Type: application/atom+xml'
  ));
  curl_setopt($ch, CURLOPT_POSTFIELDS, buildBatchXML());

  $result = curl_exec($ch);  /* Execute the HTTP request. */
  curl_close($ch);           /* Close the cURL handle.    */

  return $result;
}

/**
 * Callback function for XML start tags parsed by
 * xml_parse.
 */
function startElement($parser, $name, $attrs) {
  global $curElement, $foundEntry, $parsedEntries;

  $curElement = $name;
  if($curElement == "ENTRY") {
    $foundEntry = true;
    $parsedEntries[count($parsedEntries)] = array();
  } else if($foundEntry && $curElement == "LINK") {
    $parsedEntries[count($parsedEntries) - 1][$attrs["REL"]] = $attrs["HREF"];
  }
}

/**
 * Callback function for XML end tags parsed by
 * xml_parse.
 */
function endElement($parser, $name) {
  global $curElement, $foundEntry, $parsedEntries;
  if($name == "ENTRY") {
    $foundEntry = false;
  }
}

/**
 * Callback function for XML character data parsed by
 * xml_parse.
 */
function characterData($parser, $data) {
  global $curElement, $foundEntry, $parsedEntries;

  if($foundEntry) {
    $parsedEntries[count($parsedEntries) - 1][strtolower($curElement)] = $data;
  }
}

/**
 * We arrive here when the user first comes to the form. The first step is
 * to have them get a single-use token.
 */
function showIntroPage() {
  global $itemsFeedURL;

  $next_url  = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'];
  $redirect_url = 'https://www.google.com/accounts/AuthSubRequest?session=1';
  $redirect_url .= '&next=';
  $redirect_url .= urlencode($next_url);
  $redirect_url .= "&scope=";
  $redirect_url .= urlencode($itemsFeedURL);

  print '<html>' . "\n";
  print '<head><title>PHP Demo: Google Base data API</title>' . "\n";
  print '<link rel="stylesheet" type="text/css" href="../../../css/dev_docs.css">' . "\n";
  print '</head>' . "\n";
  print '<body><center>' . "\n";
  print '<table style="width:50%;">' . "\n";
  print '<tr>' . "\n";
  print '<th colspan="2" style="text-align:center;">PHP Demo: Google Base data API</th>' . "\n";
  print '</tr>' . "\n";