zotero/translators/Amazon.com.js

{
	"translatorID":"96b9f483-c44d-5784-cdad-ce21b984fe01",
	"translatorType":4,
	"label":"Amazon.com",
	"creator":"Sean Takats and Michael Berkowitz",
	"target":"^https?://(?:www\\.)?amazon",
	"minVersion":"1.0.0b4.r1",
	"maxVersion":"",
	"priority":100,
	"inRepository":true,
	"lastUpdated":"2009-08-18 06:20:00"
}

function detectWeb(doc, url) { 

	var suffixRe = new RegExp("https?://(?:www\.)?amazon\.([^/]+)/");
	var suffixMatch = suffixRe.exec(url);
	var suffix = suffixMatch[1];
	var searchRe = new RegExp('^https?://(?:www\.)?amazon\.' + suffix + '/(gp/search/|exec/obidos/search-handle-url/|s/|[^/]+/lm/|gp/richpub/)');
	Zotero.debug(searchRe.test(doc.location.href));
	if(searchRe.test(doc.location.href)) {
		return "multiple";
	} else {
		var namespace = doc.documentElement.namespaceURI;
		var nsResolver = namespace ? function(prefix) {
			if (prefix == 'x') return namespace; else return null;
		} : null;
		
		var xpath = '//input[@name="ASIN"]';
		if(doc.evaluate(xpath, doc, nsResolver, XPathResult.ANY_TYPE, null).iterateNext()) {
			var elmt = doc.evaluate('//input[@name="storeID"]', doc, nsResolver, XPathResult.ANY_TYPE, null).iterateNext();
			if(elmt) {
				var storeID = elmt.value;
				Zotero.debug("store id: " + storeID);
				if (storeID=="books"){
					return "book";
				}
				else if (storeID=="music"){
					return "audioRecording";
				}
				else if (storeID=="dvd"|storeID=="video"){
					return "videoRecording";
				}
				else {
					return "book";
				}
			}
			else {
				return "book";
			}
		}
	}
}

function doWeb(doc, url) {
	var namespace = doc.documentElement.namespaceURI;
	var nsResolver = namespace ? function(prefix) {
			if (prefix == 'x') return namespace; else return null;
		} : null;
	

	var suffixRe = new RegExp("https?://(?:www\.)?amazon\.([^/]+)/");
	var suffixMatch = suffixRe.exec(url);
	var suffix = suffixMatch[1];

	var searchRe = new RegExp('^https?://(?:www\.)?amazon\.' + suffix + '/(gp/search/|exec/obidos/search-handle-url/|s/|[^/]+/lm/|gp/richpub/)');
	var m = searchRe.exec(doc.location.href);
	var uris = new Array();
	if (suffix == "co.jp"){
		suffix = "jp";
	}
	if (suffix == ".com") suffix = "com";
	if(m) {
		var availableItems = new Array();
		
		
		if(doc.location.href.match(/gp\/richpub\//)){ // Show selector for Guides
			var xpath = '//a[(contains(@href, "ref=cm_syf_dtl_pl") or contains(@href, "ref=cm_syf_dtl_top")) and preceding-sibling::b]';
		} else if (doc.location.href.match(/\/lm\//)) { // Show selector for Lists
			var xpath = '//span[@id="lm_asinlink95"]//a'
		} else { // Show selector for Search results
			var xpath = '//div[@class="productTitle"]/a | //a[span[@class="srTitle"]]';
		}
		var elmts = doc.evaluate(xpath, doc, nsResolver, XPathResult.ANY_TYPE, null);
		var elmt = elmts.iterateNext();
		var asins = new Array();
		var i = 0;
		var asinRe = new RegExp('/(dp|product)/([^/]+)/');
		do {
			var link = elmt.href;
			var searchTitle = elmt.textContent;
			if  (asinRe.exec(link)) {
				var asinMatch = asinRe.exec(link);
				availableItems[i] = searchTitle;
				asins[i] = asinMatch[2];
				i++;
			}
		} while (elmt = elmts.iterateNext());
		var items = Zotero.selectItems(availableItems);
		
		
		if(!items) {
			return true;
		}
		
		for(var i in items) {
			var timestamp = encodeURIComponent(generateISODate());
			var params = "AWSAccessKeyId=AKIAIPYIWJ24AGZJ64AA&ItemId=" + asins[i] + "&Operation=ItemLookup&ResponseGroup=ItemAttributes&Service=AWSECommerceService&Timestamp="+timestamp+"&Version=2006-06-28";
			var signString = "GET\necs.amazonaws."+suffix+"\n/onca/xml\n"+params;
			var signature = b64_hmac_sha256("054vk/Lt3LJMxch1srIHUbvI+2T/fZ6E5c0qwlbj", signString);
			signature = encodeURIComponent(signature);
			uris.push("http://ecs.amazonaws." + suffix + "/onca/xml?"+params+"&Signature="+signature+"%3D"); //wants the %3D for some reason
		}

	} else {
		var elmts = doc.evaluate('//input[@name = "ASIN"]', doc,
	                       nsResolver, XPathResult.ANY_TYPE, null);
		var elmt;
		while(elmt = elmts.iterateNext()) {
			var asin = elmt.value;
		}
		var timestamp = encodeURIComponent(generateISODate()); 
		var params = "AWSAccessKeyId=AKIAIPYIWJ24AGZJ64AA&ItemId=" + asin + "&Operation=ItemLookup&ResponseGroup=ItemAttributes&Service=AWSECommerceService&Timestamp="+timestamp+"&Version=2006-06-28";
		var signString = "GET\necs.amazonaws."+suffix+"\n/onca/xml\n"+params;
		var signature = b64_hmac_sha256("054vk/Lt3LJMxch1srIHUbvI+2T/fZ6E5c0qwlbj", signString);
		signature = encodeURIComponent(signature);		
		uris.push("http://ecs.amazonaws." + suffix + "/onca/xml?"+params+"&Signature="+signature+"%3D"); //wants the %3D for some reason
	}
	Zotero.Utilities.HTTP.doGet(uris, function(text) {
		text = text.replace(/<!DOCTYPE[^>]*>/, "").replace(/<\?xml[^>]*\?>/, "");
		var texts = text.split("<Items>");
		texts = texts[1].split("</ItemLookupResponse>");
		text = "<Items>" + texts[0];
		var xml = new XML(text);
		var publisher = "";
	
		if (!xml..Errors.length()) {
			if (xml..Publisher.length()){
				publisher = Zotero.Utilities.cleanString(xml..Publisher[0].text().toString());
			}
			
			var binding = "";
			if (xml..Binding.length()){
				binding = Zotero.Utilities.cleanString(xml..Binding[0].text().toString());
			}
			
			var productGroup = "";
			if (xml..ProductGroup.length()){
				productGroup = Zotero.Utilities.cleanString(xml..ProductGroup[0].text().toString());
			}
				
			if (productGroup=="Book") {
				var newItem = new Zotero.Item("book");
				newItem.publisher = publisher;
			}
			else if (productGroup == "Music") {
				var newItem = new Zotero.Item("audioRecording");
				newItem.label = publisher;
				newItem.audioRecordingType = binding;
				for(var i=0; i<xml..Artist.length(); i++) {
					newItem.creators.push(Zotero.Utilities.cleanAuthor(xml..Artist[i].text().toString(), "performer"));
				}
			}
			else if (productGroup == "DVD" | productGroup == "Video") {
				var newItem = new Zotero.Item("videoRecording");
				newItem.studio = publisher;
				newItem.videoRecordingType = binding;
				for(var i=0; i<xml..Actor.length(); i++) {
					newItem.creators.push(Zotero.Utilities.cleanAuthor(xml..Actor[i].text().toString(), "castMember"));
				}
				for(var i=0; i<xml..Director.length(); i++) {
					newItem.creators.push(Zotero.Utilities.cleanAuthor(xml..Director[i].text().toString(), "director"));
				}		
			}
			else{
				var newItem = new Zotero.Item("book");
				newItem.publisher = publisher;
			}
			
			if(xml..RunningTime.length()){
				newItem.runningTime = Zotero.Utilities.cleanString(xml..RunningTime[0].text().toString());
			}
			
			// Retrieve authors and other creators
			for(var i=0; i<xml..Author.length(); i++) {
				newItem.creators.push(Zotero.Utilities.cleanAuthor(xml..Author[i].text().toString(), "author"));
			}
			if (newItem.creators.length == 0){
				for(var i=0; i<xml..Creator.length(); i++) {
					newItem.creators.push(Zotero.Utilities.cleanAuthor(xml..Creator[i].text().toString()));
				}
			}
			
			if (xml..PublicationDate.length()){
				newItem.date = Zotero.Utilities.cleanString(xml..PublicationDate[0].text().toString());
			} else if (xml..ReleaseDate.length()){
				newItem.date = Zotero.Utilities.cleanString(xml..ReleaseDate[0].text().toString());
			}
			if (xml..Edition.length()){
				newItem.edition = Zotero.Utilities.cleanString(xml..Edition[0].text().toString());
			}
			if (xml..ISBN.length()){
				newItem.ISBN = Zotero.Utilities.cleanString(xml..ISBN[0].text().toString());
			}
//			Uncomment when numPages field is added to schema
//			if (xml..NumberOfPages.length()){
//				newItem.numPages = Zotero.Utilities.cleanString(xml..NumberOfPages[0].text().toString());
//			}
			var title = Zotero.Utilities.cleanString(xml..Title[0].text().toString());
			if(title.lastIndexOf("(") != -1 && title.lastIndexOf(")") == title.length-1) {
				title = title.substring(0, title.lastIndexOf("(")-1);
			}
			if (xml..ASIN.length()){
				var url = "http://www.amazon." + suffix + "/dp/" + Zotero.Utilities.cleanString(xml..ASIN[0].text().toString());
				newItem.attachments.push({title:"Amazon.com Link", snapshot:false, mimeType:"text/html", url:url});
			}
			
			if (xml..OriginalReleaseDate.length()){
				newItem.extra = Zotero.Utilities.cleanString(xml..OriginalReleaseDate[0].text().toString());
			}
			
			newItem.title = title;
			newItem.complete();
		}
	}, function() {Zotero.done();}, null);
	Zotero.wait();
}

function generateISODate(){
	var ts = new Date();
	var isodate = ts.getUTCFullYear()+"-"+Zotero.Utilities.lpad(ts.getUTCMonth()+1, "0", 2)+"-"+Zotero.Utilities.lpad(ts.getUTCDate(), "0", 2)+"T"+Zotero.Utilities.lpad(ts.getUTCHours(), "0", 2)+":"+Zotero.Utilities.lpad(ts.getUTCMinutes(), "0", 2)+":"+Zotero.Utilities.lpad(ts.getUTCSeconds(), "0", 2)+"Z";
	return isodate;
}

/*
 * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined
 * in FIPS 180-2
 * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * Distributed under the BSD License
 * See http://pajhome.org.uk/crypt/md5 for details.
 * Also http://anmar.eu.org/projects/jssha2/
 */

/*
 * Configurable variables. You may need to tweak these to be compatible with
 * the server-side, but the defaults work in most cases.
 */
var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */
var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */

/*
 * These are the functions you'll usually want to call
 * They take string arguments and return either hex or base-64 encoded strings
 */
function hex_sha256(s)    { return rstr2hex(rstr_sha256(str2rstr_utf8(s))); }
function b64_sha256(s)    { return rstr2b64(rstr_sha256(str2rstr_utf8(s))); }
function any_sha256(s, e) { return rstr2any(rstr_sha256(str2rstr_utf8(s)), e); }
function hex_hmac_sha256(k, d)
  { return rstr2hex(rstr_hmac_sha256(str2rstr_utf8(k), str2rstr_utf8(d))); }
function b64_hmac_sha256(k, d)
  { return rstr2b64(rstr_hmac_sha256(str2rstr_utf8(k), str2rstr_utf8(d))); }
function any_hmac_sha256(k, d, e)
  { return rstr2any(rstr_hmac_sha256(str2rstr_utf8(k), str2rstr_utf8(d)), e); }

/*
 * Perform a simple self-test to see if the VM is working
 */
function sha256_vm_test()
{
  return hex_sha256("abc").toLowerCase() ==
            "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad";
}

/*
 * Calculate the sha256 of a raw string
 */
function rstr_sha256(s)
{
  return binb2rstr(binb_sha256(rstr2binb(s), s.length * 8));
}

/*
 * Calculate the HMAC-sha256 of a key and some data (raw strings)
 */
function rstr_hmac_sha256(key, data)
{
  var bkey = rstr2binb(key);
  if(bkey.length > 16) bkey = binb_sha256(bkey, key.length * 8);

  var ipad = Array(16), opad = Array(16);
  for(var i = 0; i < 16; i++)
  {
    ipad[i] = bkey[i] ^ 0x36363636;
    opad[i] = bkey[i] ^ 0x5C5C5C5C;
  }

  var hash = binb_sha256(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
  return binb2rstr(binb_sha256(opad.concat(hash), 512 + 256));
}

/*
 * Convert a raw string to a hex string
 */
function rstr2hex(input)
{
  try { hexcase } catch(e) { hexcase=0; }
  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
  var output = "";
  var x;
  for(var i = 0; i < input.length; i++)
  {
    x = input.charCodeAt(i);
    output += hex_tab.charAt((x >>> 4) & 0x0F)
           +  hex_tab.charAt( x        & 0x0F);
  }
  return output;
}

/*
 * Convert a raw string to a base-64 string
 */
function rstr2b64(input)
{
  try { b64pad } catch(e) { b64pad=''; }
  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var output = "";
  var len = input.length;
  for(var i = 0; i < len; i += 3)
  {
    var triplet = (input.charCodeAt(i) << 16)
                | (i + 1 < len ? input.charCodeAt(i+1) << 8 : 0)
                | (i + 2 < len ? input.charCodeAt(i+2)      : 0);
    for(var j = 0; j < 4; j++)
    {
      if(i * 8 + j * 6 > input.length * 8) output += b64pad;
      else output += tab.charAt((triplet >>> 6*(3-j)) & 0x3F);
    }
  }
  return output;
}

/*
 * Convert a raw string to an arbitrary string encoding
 */
function rstr2any(input, encoding)
{
  var divisor = encoding.length;
  var remainders = Array();
  var i, q, x, quotient;

  /* Convert to an array of 16-bit big-endian values, forming the dividend */
  var dividend = Array(Math.ceil(input.length / 2));
  for(i = 0; i < dividend.length; i++)
  {
    dividend[i] = (input.charCodeAt(i * 2) << 8) | input.charCodeAt(i * 2 + 1);
  }

  /*
   * Repeatedly perform a long division. The binary array forms the dividend,
   * the length of the encoding is the divisor. Once computed, the quotient
   * forms the dividend for the next step. We stop when the dividend is zero.
   * All remainders are stored for later use.
   */
  while(dividend.length > 0)
  {
    quotient = Array();
    x = 0;
    for(i = 0; i < dividend.length; i++)
    {
      x = (x << 16) + dividend[i];
      q = Math.floor(x / divisor);
      x -= q * divisor;
      if(quotient.length > 0 || q > 0)
        quotient[quotient.length] = q;
    }
    remainders[remainders.length] = x;
    dividend = quotient;
  }

  /* Convert the remainders to the output string */
  var output = "";
  for(i = remainders.length - 1; i >= 0; i--)
    output += encoding.charAt(remainders[i]);

  /* Append leading zero equivalents */
  var full_length = Math.ceil(input.length * 8 /
                                    (Math.log(encoding.length) / Math.log(2)))
  for(i = output.length; i < full_length; i++)
    output = encoding[0] + output;

  return output;
}

/*
 * Encode a string as utf-8.
 * For efficiency, this assumes the input is valid utf-16.
 */
function str2rstr_utf8(input)
{
  var output = "";
  var i = -1;
  var x, y;

  while(++i < input.length)
  {
    /* Decode utf-16 surrogate pairs */
    x = input.charCodeAt(i);
    y = i + 1 < input.length ? input.charCodeAt(i + 1) : 0;
    if(0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF)
    {
      x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
      i++;
    }

    /* Encode output as utf-8 */
    if(x <= 0x7F)
      output += String.fromCharCode(x);
    else if(x <= 0x7FF)
      output += String.fromCharCode(0xC0 | ((x >>> 6 ) & 0x1F),
                                    0x80 | ( x         & 0x3F));
    else if(x <= 0xFFFF)
      output += String.fromCharCode(0xE0 | ((x >>> 12) & 0x0F),
                                    0x80 | ((x >>> 6 ) & 0x3F),
                                    0x80 | ( x         & 0x3F));
    else if(x <= 0x1FFFFF)
      output += String.fromCharCode(0xF0 | ((x >>> 18) & 0x07),
                                    0x80 | ((x >>> 12) & 0x3F),
                                    0x80 | ((x >>> 6 ) & 0x3F),
                                    0x80 | ( x         & 0x3F));
  }
  return output;
}

/*
 * Encode a string as utf-16
 */
function str2rstr_utf16le(input)
{
  var output = "";
  for(var i = 0; i < input.length; i++)
    output += String.fromCharCode( input.charCodeAt(i)        & 0xFF,
                                  (input.charCodeAt(i) >>> 8) & 0xFF);
  return output;
}

function str2rstr_utf16be(input)
{
  var output = "";
  for(var i = 0; i < input.length; i++)
    output += String.fromCharCode((input.charCodeAt(i) >>> 8) & 0xFF,
                                   input.charCodeAt(i)        & 0xFF);
  return output;
}

/*
 * Convert a raw string to an array of big-endian words
 * Characters >255 have their high-byte silently ignored.
 */
function rstr2binb(input)
{
  var output = Array(input.length >> 2);
  for(var i = 0; i < output.length; i++)
    output[i] = 0;
  for(var i = 0; i < input.length * 8; i += 8)
    output[i>>5] |= (input.charCodeAt(i / 8) & 0xFF) << (24 - i % 32);
  return output;
}

/*
 * Convert an array of big-endian words to a string
 */
function binb2rstr(input)
{
  var output = "";
  for(var i = 0; i < input.length * 32; i += 8)
    output += String.fromCharCode((input[i>>5] >>> (24 - i % 32)) & 0xFF);
  return output;
}

/*
 * Main sha256 function, with its support functions
 */
function sha256_S (X, n) {return ( X >>> n ) | (X << (32 - n));}
function sha256_R (X, n) {return ( X >>> n );}
function sha256_Ch(x, y, z) {return ((x & y) ^ ((~x) & z));}
function sha256_Maj(x, y, z) {return ((x & y) ^ (x & z) ^ (y & z));}
function sha256_Sigma0256(x) {return (sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22));}
function sha256_Sigma1256(x) {return (sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25));}
function sha256_Gamma0256(x) {return (sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3));}
function sha256_Gamma1256(x) {return (sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10));}
function sha256_Sigma0512(x) {return (sha256_S(x, 28) ^ sha256_S(x, 34) ^ sha256_S(x, 39));}
function sha256_Sigma1512(x) {return (sha256_S(x, 14) ^ sha256_S(x, 18) ^ sha256_S(x, 41));}
function sha256_Gamma0512(x) {return (sha256_S(x, 1)  ^ sha256_S(x, 8) ^ sha256_R(x, 7));}
function sha256_Gamma1512(x) {return (sha256_S(x, 19) ^ sha256_S(x, 61) ^ sha256_R(x, 6));}

var sha256_K = new Array
(
  1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993,
  -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987,
  1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522,
  264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986,
  -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585,
  113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291,
  1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885,
  -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344,
  430227734, 506948616, 659060556, 883997877, 958139571, 1322822218,
  1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872,
  -1866530822, -1538233109, -1090935817, -965641998
);

function binb_sha256(m, l)
{
  var HASH = new Array(1779033703, -1150833019, 1013904242, -1521486534,
                       1359893119, -1694144372, 528734635, 1541459225);
  var W = new Array(64);
  var a, b, c, d, e, f, g, h;
  var i, j, T1, T2;

  /* append padding */
  m[l >> 5] |= 0x80 << (24 - l % 32);
  m[((l + 64 >> 9) << 4) + 15] = l;

  for(i = 0; i < m.length; i += 16)
  {
    a = HASH[0];
    b = HASH[1];
    c = HASH[2];
    d = HASH[3];
    e = HASH[4];
    f = HASH[5];
    g = HASH[6];
    h = HASH[7];

    for(j = 0; j < 64; j++)
    {
      if (j < 16) W[j] = m[j + i];
      else W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]),
                                            sha256_Gamma0256(W[j - 15])), W[j - 16]);

      T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)),
                                                          sha256_K[j]), W[j]);
      T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
      h = g;
      g = f;
      f = e;
      e = safe_add(d, T1);
      d = c;
      c = b;
      b = a;
      a = safe_add(T1, T2);
    }

    HASH[0] = safe_add(a, HASH[0]);
    HASH[1] = safe_add(b, HASH[1]);
    HASH[2] = safe_add(c, HASH[2]);
    HASH[3] = safe_add(d, HASH[3]);
    HASH[4] = safe_add(e, HASH[4]);
    HASH[5] = safe_add(f, HASH[5]);
    HASH[6] = safe_add(g, HASH[6]);
    HASH[7] = safe_add(h, HASH[7]);
  }
  return HASH;
}

function safe_add (x, y)
{
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
}