1 files changed, 70 insertions, 0 deletions
diff --git a/httprpc.js b/httprpc.js
new file mode 100644
index 000000000..50674ec94
--- /dev/null
+++ b/httprpc.js
@@ -0,0 +1,70 @@
+(function () {
+    var HttpRpcProvider = function (host) {
+        this.handlers = [];
+        this.host = host;
+    };
+
+    function formatJsonRpcObject(object) {
+        return {
+            jsonrpc: '2.0',
+            method: object.call,
+            params: object.args,
+            id: object._id
+        }
+    };
+
+    function formatJsonRpcMessage(message) {    
+        var object = JSON.parse(message);
+       
+        return {
+            _id: object.id,
+            data: object.result
+        };
+    };
+
+    HttpRpcProvider.prototype.sendRequest = function (payload, cb) {
+        var data = formatJsonRpcObject(payload);
+
+        var request = new XMLHttpRequest();
+        request.open("POST", this.host, true);
+        request.send(JSON.stringify(data));
+        request.onreadystatechange = function () {
+            if (request.readyState === 4 && cb) {
+                cb(request);
+            }
+        }
+    };
+
+    HttpRpcProvider.prototype.send = function (payload) {
+        var self = this;
+        this.sendRequest(payload, function (request) {
+            self.handlers.forEach(function (handler) {
+                handler.call(self, formatJsonRpcMessage(request.responseText));
+            });
+        });
+    };
+
+    HttpRpcProvider.prototype.poll = function (payload, id) {
+        var self = this;
+        this.sendRequest(payload, function (request) {
+            var parsed = JSON.parse(request.responseText);
+            if (!parsed.result) {
+                return;
+            }
+            self.handlers.forEach(function (handler) {
+                handler.call(self, {_event: "messages", data: id});
+            });
+        });
+    };
+
+    Object.defineProperty(HttpRpcProvider.prototype, "onmessage", {
+        set: function (handler) {
+            this.handlers.push(handler);
+        }
+    });
+
+    if (typeof(web3) !== "undefined" && web3.providers !== undefined) {
+        web3.providers.HttpRpcProvider = HttpRpcProvider;
+    }
+})();
+