api for sharing localstorage across subdomains

8 years ago · 75170353fe
parent a6fd285642
commit 75170353fe
2 changed files with 90 additions and 0 deletions
--- a/customize.dist/share/frame.html
+++ b/customize.dist/share/frame.html
@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="respond.js"></script>
+</head>
+<body>
+
--- a/customize.dist/share/respond.js
+++ b/customize.dist/share/respond.js
@ -0,0 +1,83 @@
+var validDomains = [
+    /cryptpad.fr$/i,
+];
+
+var isValidDomain = function (o) {
+    return validDomains.some(function (e) {
+        switch (typeof(e)) {
+            case 'string': return e === o;
+            case 'object': return e.test(o);
+        }
+    });
+};
+
+var isArray = function (o) { return Object.prototype.toString.call(o) === '[object Array]'; };
+
+window.addEventListener('message', function(e) {
+    if (!isValidDomain(e.origin)) { return; }
+    var payload = JSON.parse(e.data);
+    var parent = window.parent;
+    var respond = function (error, data) {
+        var res = {
+            _uid: payload._uid,
+            error: error,
+            data: data,
+        };
+        parent.postMessage(JSON.stringify(res), '*');
+    };
+
+    //console.log(payload);
+
+    switch(payload.method) {
+        case 'set':
+            localStorage.setItem(payload.key, JSON.stringify(payload.data));
+            respond();
+            break;
+        case 'batchset':
+            if (isArray(payload.data) || typeof(payload.data) !== 'object') {
+                respond('[batchset.TypeError] expected key-value pairs to set');
+                return;
+            }
+            Object.keys(payload.data).forEach(function (k) {
+                localStorage.setItem(k, JSON.stringify(payload.data[k]));
+            });
+            respond();
+            break;
+        case 'get':
+            respond(void 0, JSON.parse(localStorage.getItem(payload.key)));
+            break;
+        case 'batchget':
+            if (!isArray(payload.data)) {
+                respond('[batchget.TypeError] expected array of keys to return');
+                return;
+            }
+            var map = {};
+            payload.data.forEach(function (k) {
+                map[k] = JSON.parse(localStorage.getItem(k));
+            });
+            respond(void 0, map);
+            break;
+        case 'remove':
+            //console.log("Removing %s from localStorage", payload.key);
+            localStorage.removeItem(payload.key);
+            respond();
+            break;
+        case 'batchremove':
+            if (!isArray(payload.data)) {
+                respond('[batchremove.TypeError] expected array of keys to remove');
+                return;
+            }
+            payload.data.forEach(function (k) {
+                localStorage.removeItem(k);
+            });
+            respond();
+            break;
+        case 'keys':
+            respond(void 0, Object.keys(localStorage));
+            break;
+        case undefined:
+            respond('No method supplied');
+            break;
+    }
+});
+