Merge pull request #411 from Mortymus/master

Added table to search for slides on Slideshare.

slideshare/slideshare.slideshows.search.xml

@@ -0,0 +1,204 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<table xmlns="http://query.yahooapis.com/v1/schema/table.xsd">
+  <meta>
+    <author>Andre Tebart</author>
+    <documentationURL>http://www.slideshare.com</documentationURL>
+    <sampleQuery>select * from slideshare.slideshows.search where api_key="YOUR_API_KEY" and shared_secret="YOUR_SHARED_SECRET" and q="yql"</sampleQuery>
+  </meta>
+  <bindings>
+    <select itemPath="" produces="XML">
+      <urls>
+        <url>https://www.slideshare.net/api/2/search_slideshows</url>
+      </urls>
+      <inputs>
+        <key id="q" type="xs:string" paramType="query" required="true" />
+        <key id="api_key" type="xs:string" paramType="query" required="true" />
+        <key id="shared_secret" type="xs:string" paramType="variable" required="true" />
+        <key id="page" type="xs:string" paramType="query" required="false" />
+        <key id="items_per_page" type="xs:string" paramType="query" required="false" />
+        <key id="lang" type="xs:string" paramType="query" required="false" />
+
+      </inputs>
+      <execute>
+        <![CDATA[
+
+        //First of all a function to compute the SHA1 hash of a string.
+        //There is also a sha1 function in y.crypto but it did not work for me.
+        //This function is taken from http://www.webtoolkit.info/
+        function SHA1 (msg) {
+         
+          function rotate_left(n,s) {
+            var t4 = ( n<<s ) | (n>>>(32-s));
+            return t4;
+          };
+         
+          function lsb_hex(val) {
+            var str="";
+            var i;
+            var vh;
+            var vl;
+         
+            for( i=0; i<=6; i+=2 ) {
+              vh = (val>>>(i*4+4))&0x0f;
+              vl = (val>>>(i*4))&0x0f;
+              str += vh.toString(16) + vl.toString(16);
+            }
+            return str;
+          };
+         
+          function cvt_hex(val) {
+            var str="";
+            var i;
+            var v;
+         
+            for( i=7; i>=0; i-- ) {
+              v = (val>>>(i*4))&0x0f;
+              str += v.toString(16);
+            }
+            return str;
+          };
+         
+         
+          function Utf8Encode(string) {
+            string = string.replace(/\r\n/g,"\n");
+            var utftext = "";
+         
+            for (var n = 0; n < string.length; n++) {
+         
+              var c = string.charCodeAt(n);
+         
+              if (c < 128) {
+                utftext += String.fromCharCode(c);
+              }
+              else if((c > 127) && (c < 2048)) {
+                utftext += String.fromCharCode((c >> 6) | 192);
+                utftext += String.fromCharCode((c & 63) | 128);
+              }
+              else {
+                utftext += String.fromCharCode((c >> 12) | 224);
+                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
+                utftext += String.fromCharCode((c & 63) | 128);
+              }
+         
+            }
+         
+            return utftext;
+          };
+         
+          var blockstart;
+          var i, j;
+          var W = new Array(80);
+          var H0 = 0x67452301;
+          var H1 = 0xEFCDAB89;
+          var H2 = 0x98BADCFE;
+          var H3 = 0x10325476;
+          var H4 = 0xC3D2E1F0;
+          var A, B, C, D, E;
+          var temp;
+         
+          msg = Utf8Encode(msg);
+         
+          var msg_len = msg.length;
+         
+          var word_array = new Array();
+          for( i=0; i<msg_len-3; i+=4 ) {
+            j = msg.charCodeAt(i)<<24 | msg.charCodeAt(i+1)<<16 |
+            msg.charCodeAt(i+2)<<8 | msg.charCodeAt(i+3);
+            word_array.push( j );
+          }
+         
+          switch( msg_len % 4 ) {
+            case 0:
+              i = 0x080000000;
+            break;
+            case 1:
+              i = msg.charCodeAt(msg_len-1)<<24 | 0x0800000;
+            break;
+         
+            case 2:
+              i = msg.charCodeAt(msg_len-2)<<24 | msg.charCodeAt(msg_len-1)<<16 | 0x08000;
+            break;
+         
+            case 3:
+              i = msg.charCodeAt(msg_len-3)<<24 | msg.charCodeAt(msg_len-2)<<16 | msg.charCodeAt(msg_len-1)<<8  | 0x80;
+            break;
+          }
+         
+          word_array.push( i );
+         
+          while( (word_array.length % 16) != 14 ) word_array.push( 0 );
+         
+          word_array.push( msg_len>>>29 );
+          word_array.push( (msg_len<<3)&0x0ffffffff );
+         
+         
+          for ( blockstart=0; blockstart<word_array.length; blockstart+=16 ) {
+         
+            for( i=0; i<16; i++ ) W[i] = word_array[blockstart+i];
+            for( i=16; i<=79; i++ ) W[i] = rotate_left(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1);
+         
+            A = H0;
+            B = H1;
+            C = H2;
+            D = H3;
+            E = H4;
+         
+            for( i= 0; i<=19; i++ ) {
+              temp = (rotate_left(A,5) + ((B&C) | (~B&D)) + E + W[i] + 0x5A827999) & 0x0ffffffff;
+              E = D;
+              D = C;
+              C = rotate_left(B,30);
+              B = A;
+              A = temp;
+            }
+         
+            for( i=20; i<=39; i++ ) {
+              temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0x6ED9EBA1) & 0x0ffffffff;
+              E = D;
+              D = C;
+              C = rotate_left(B,30);
+              B = A;
+              A = temp;
+            }
+         
+            for( i=40; i<=59; i++ ) {
+              temp = (rotate_left(A,5) + ((B&C) | (B&D) | (C&D)) + E + W[i] + 0x8F1BBCDC) & 0x0ffffffff;
+              E = D;
+              D = C;
+              C = rotate_left(B,30);
+              B = A;
+              A = temp;
+            }
+         
+            for( i=60; i<=79; i++ ) {
+              temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0xCA62C1D6) & 0x0ffffffff;
+              E = D;
+              D = C;
+              C = rotate_left(B,30);
+              B = A;
+              A = temp;
+            }
+         
+            H0 = (H0 + A) & 0x0ffffffff;
+            H1 = (H1 + B) & 0x0ffffffff;
+            H2 = (H2 + C) & 0x0ffffffff;
+            H3 = (H3 + D) & 0x0ffffffff;
+            H4 = (H4 + E) & 0x0ffffffff;
+         
+          }
+         
+          var temp = cvt_hex(H0) + cvt_hex(H1) + cvt_hex(H2) + cvt_hex(H3) + cvt_hex(H4);
+         
+          return temp.toLowerCase();
+         
+        }
+
+        //The SlideShare search API requires a timestamp and a hash which we conveniently compute here
+        var timeStamp = Math.round(y.date.getOffsetFromEpochInMillis("now")/1000);
+        var hash = SHA1(shared_secret + timeStamp);
+        response.object = request.query("ts", "" + timeStamp).query("hash", hash).get().response;
+        ]]>
+      </execute>
+    </select>
+  </bindings>
+</table>