sscl.requestLookup = function () {

    var canonicalUUID;

    chrome.tabs.query({active: true, currentWindow: true}, function (tabs) {
        var pageURL = tabs[0].url;
        if (SSCL_DEBUG > 0) {
            console.log("sscl.requestLookup() - pageURL:" + pageURL);
        }
        // Try to get the UUID from Slingstone lookup service
        var pageLookupURL = "http://api.content.slingstone.yahoo.com:4080/v2/dump/url/" + encodeURIComponent(pageURL);
        if (SSCL_DEBUG > 0) {
            console.log("sscl.requestLookup() - uuidLookupURL:" + pageLookupURL);
        }
        var pageRequest = new XMLHttpRequest();
        pageRequest.open("GET", pageLookupURL, true);
        pageRequest.onreadystatechange = function () {
            if (pageRequest.readyState == 4) {

                // Also see if there is is a canonical UUID
                try {
                    var apiObject = sscl.extractJson(pageRequest);
                    canonicalUUID = apiObject["m-m"].canonical_uuid;
                    if (SSCL_DEBUG > 0) {
                        console.log("sscl.requestLookup() - found canonical_uuid:" + canonicalUUID);
                    }
                } catch (e) {
                    console.log(e);
                    // ignore exceptions in extracting canonical uuid - broken JSON or missing canonical. This is an optional field in the response.
                }


                if ( undefined != canonicalUUID && canonicalUUID.length > 0 ) {
                    // Try to get the UUID from Slingstone lookup service
                    var canonicalLookupURL = "http://api.content.slingstone.yahoo.com:4080/v2/dump/uuid/" + canonicalUUID;
                    if (SSCL_DEBUG > 0) {
                        console.log("sscl.requestLookup() - uuidLookupURL:" + canonicalLookupURL);
                    }
                    var canonicalRequest = new XMLHttpRequest();
                    canonicalRequest.open("GET", canonicalLookupURL, true);
                    canonicalRequest.onreadystatechange = function () {
                        if (canonicalRequest.readyState == 4) {
                            sscl.handleLookupContentItemResponse(canonicalRequest, canonicalLookupURL, "UUID-based lookup from canonical UUID in HBase: " + canonicalUUID);
                        }
                    }
                    canonicalRequest.send(null);
                }

                // Send off another request to get feeding status for UUID based on the canonical URL
                var canonicalFeedingLookupURL = "http://dev1-lc001.slingstone.gq1.yahoo.com:9999/life_cycle_debug/?uuid=" + canonicalUUID;
                var canonicalFeedingRequest  = new XMLHttpRequest();
                canonicalFeedingRequest.open("GET", canonicalFeedingLookupURL, true);
                canonicalFeedingRequest.onreadystatechange = function () {
                    if (canonicalFeedingRequest.readyState == 4) {
                        sscl.handleFeedingResponse(canonicalFeedingRequest, canonicalFeedingLookupURL, "UUID-based lookup from UUID in HBase (feeding): " + canonicalUUID);
                    }
                }
                canonicalFeedingRequest.send(null);

                // Finally we can process the original response because we have sent off all other requests: canonical and feeding
                sscl.handleLookupContentItemResponse(pageRequest, pageLookupURL, "Name-based lookup from URL: " + pageURL);

            }
        }
        pageRequest.send(null);

        // Also lookup the feeding and serving filter status
        // We can fire off this request right away since we have the URL
        var pageFeedingLookupURL = "http://dev1-lc001.slingstone.gq1.yahoo.com:9999/life_cycle_debug/?url=" + pageURL;
        var pageFeedingRequest  = new XMLHttpRequest();
        pageFeedingRequest.open("GET", pageFeedingLookupURL, true);
        pageFeedingRequest.onreadystatechange = function () {
            if (pageFeedingRequest.readyState == 4) {
                sscl.handleFeedingResponse(pageFeedingRequest, pageFeedingLookupURL, "Name-based lookup from URL (feeding): " + pageURL);
            }
        }
        pageFeedingRequest.send(null);

    });
};