https://www.stamps.com/wp-content/themes/stamps/cookieSetup.js?ver=1790239302

1jQuery(document).ready(async () => {
2
3    const DURATION = 3600*24*365*2;
4    const SOURCE_DURATION = 3600*24*30;
5
6    let visitor = getCookie("Visitor");
7    let entryTimestamp = getCookie("entryTimestamp");
8    let trackingBrowser = getCookie("TrackingBrowser");
9    let lastPageVisited = localStorage.getItem('lastVisitedPage');
10    const data = await fetch("/wp-json/itss/cookies");
11    const { timestamp, identity } = await data.json();
12
13    let domain = location.host;
14    if (domain === "www.stamps.com") {
15        domain = ".stamps.com";
16    }
17
18    if (!visitor) {
19        const uuid = self.crypto.randomUUID();
20        document.cookie = `Visitor=${uuid};max-age=${DURATION};path=/;domain=${domain};`;
21        visitor = uuid;
22    }
23    if (lastPageVisited) {
24        document.cookie = `lastPageVisited=${lastPageVisited};path=/;domain=${domain}`;
25    }
26    if (!entryTimestamp) {
27        const encodedTimestamp = encodeURIComponent(timestamp);
28        document.cookie = `entryTimestamp=${encodedTimestamp};path=/;domain=${domain};`
29        entryTimestamp = encodedTimestamp;
30    }
31
32    if (!trackingBrowser) {
33        document.cookie = `TrackingBrowser=${identity}.${visitor};max-age=${5 * DURATION};path=/;domain=${domain};`
34    }
35
36    window["pageData"]["VisitorId"] = visitor;
37    window["pageData"]["Timestamp"] = decodeURIComponent(entryTimestamp);
38
39    await handleSourceDetection(domain);
40
41    function gatherCookies() {
42        const cookies = {};
43        document.cookie.split(";").forEach(c => {
44            const arr = c.split("=");
45            cookies[arr[0].trim()] = arr[1].trim();
46        });
47        return cookies;
48    }
49
50    function getCookie(key) {
51        return gatherCookies()[key] || null;
52    }
53
54    function setSourceCookie(value) {
55        document.cookie = `Source=${encodeURIComponent(value)};max-age=${SOURCE_DURATION};path=/;domain=${domain};secure`;
56    }
57
58    function setSubSourceCookie(value) {
59        document.cookie = `subSource=${encodeURIComponent(value)};max-age=${SOURCE_DURATION};path=/;domain=${domain};secure`;
60    }
61
62    function isInternalReferrer(hostname) {
63        return hostname === "stamps.com"
64            || hostname === "www.stamps.com"
65            || hostname.endsWith(".stamps.com");
66    }
67
68    function getReferrerMatchCandidates(hostname) {
69        const parts = hostname.split(".");
70        if (parts.length > 3) {
71            return [parts[1], parts[2], parts[1] + "." + parts[2]];
72        } else if (parts.length > 2) {
73            return [parts[0] + "." + parts[1], parts[0], parts[1]];
74        }
75        return [parts[0]];
76    }
77
78    function matchReferrer(candidates, referrerMap) {
79        for (const candidate of candidates) {
80            for (const entry of referrerMap) {
81                if (candidate === entry.domain) {
82                    return entry;
83                }
84            }
85        }
86        return null;
87    }
88
89    async function getReferrerMap() {
90        const CACHE_KEY = "stamps_referrer_map";
91        const CACHE_TTL = 3600000;
92
93        try {
94            const cached = localStorage.getItem(CACHE_KEY);
95            if (cached) {
96                const parsed = JSON.parse(cached);
97                if (Date.now() - parsed.timestamp < CACHE_TTL) {
98                    return parsed.data;
99                }
100            }
101        } catch (e) {}
102
103        try {
104            const response = await fetch("/wp-json/itss/referrer-map");
105            if (!response.ok) throw new Error(response.status);
106            const data = await response.json();
107            if (!data || !Array.isArray(data.referrers)) throw new Error("invalid response");
108            localStorage.setItem(CACHE_KEY, JSON.stringify({
109                timestamp: Date.now(),
110                data: data
111            }));
112            return data;
113        } catch (e) {
114            try {
115                const cached = localStorage.getItem(CACHE_KEY);
116                if (cached) {
117                    return JSON.parse(cached).data;
118                }
119            } catch (e2) {}
120            return null;
121        }
122    }
123
124    async function handleSourceDetection(domain) {
125        const params = new URLSearchParams(window.location.search);
126        const hasSourceParam = params.has("source");
127        const hasSubsourceParam = params.has("subsource");
128        const existingSource = getCookie("Source");
129
130        if (hasSubsourceParam) {
131            setSubSourceCookie(params.get("subsource"));
132        }
133
134        if (hasSourceParam) {
135            setSourceCookie(params.get("source"));
136            return;
137        }
138
139        if (existingSource) {
140            return;
141        }
142
143        const referrerMap = await getReferrerMap();
144        if (!referrerMap) {
145            return;
146        }
147
148        const referrer = document.referrer;
149        if (!referrer) {
150            if (referrerMap.default_sourceid) {
151                setSourceCookie(referrerMap.default_sourceid);
152            }
153            return;
154        }
155
156        let referrerHostname;
157        try {
158            referrerHostname = new URL(referrer).hostname;
159        } catch (e) {
160            return;
161        }
162
163        if (isInternalReferrer(referrerHostname)) {
164            return;
165        }
166
167        const candidates = getReferrerMatchCandidates(referrerHostname);
168        const match = matchReferrer(candidates, referrerMap.referrers);
169
170        if (match) {
171            setSourceCookie(match.sourceid);
172            if (match.subsourceid) {
173                setSubSourceCookie(match.subsourceid);
174            }
175        } else if (referrerMap.default_sourceid) {
176            setSourceCookie(referrerMap.default_sourceid);
177        }
178    }
179});