Initial release

README.md

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+node-jsonrpc-client
+================
+
+Simple JSON-RPC client.
+
+Installation
+------------
+
+Simply use npm to install it
+
+    npm install jsonrpc-ws
+
+or download the code from the repo and stick it in your project folder.
+
+Usage
+------------
+
+    var JSONRPCClient = require('node-jsonrpc-client');
+    var client = JSONRPCClient.create("https://my-json-rpc-server/path-to-something/");
+    client.call('add', [1, 2], function (result) {
+        console.log(result);
+    });

jsonrpc-client.js

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+/**
+ * Simple JSON-RPC Client
+ */
+
+var http, https, JSONRPCClient, URL_REGEXP;
+
+// Take url in parts: scheme, host, root zone, port, and path of request
+URL_REGEXP = /(http|https):\/\/([\w\-_]+(?:\.([\w\-_]+))+)(?::([\d]+))*([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?/;
+
+http = require('http');
+https = require('https');
+
+/**
+ * JSON-RPC client
+ * @param {String} scheme Scheme of request (http|https)
+ * @param {String} host JSON-RPC server
+ * @param {Number} port Port
+ * @param {String} path Path of request
+ */
+SimpleJSONRPCClient = function (scheme, host, port, path) {
+    this.scheme = scheme;
+    this.host = host;
+    this.port = port;
+    this.path = path;
+
+    /**
+     * Call method of JSON-RPC API
+     * @param {String} method Method
+     * @param {Array} params Params of request
+     * @param {Function} [onSuccessCallback] Callback for success result
+     * @param {Function} [onErrorCallback] Callback for error
+     */
+    this.call = function(method, params, onSuccessCallback, onErrorCallback) {
+        var requestJSON, requestOptions, request;
+
+        requestJSON = JSON.stringify({
+            'id': '' + (new Date()).getTime(),
+            'method': method,
+            'params': params
+        });
+
+        requestOptions = {
+            host: this.host,
+            port: this.port,
+            path: this.path,
+            method: 'POST',
+            headers: {
+                'Content-Length': requestJSON.length
+            }
+        }
+
+        // Send request
+        request = require(this.scheme).request(requestOptions, onComplete);
+        request.write(requestJSON);
+        request.end();
+
+        function onComplete (res) {
+            var buffer = '';
+
+            res.setEncoding('utf8');
+
+            res.on('data', function(chunk) {
+                buffer = buffer + chunk;
+            });
+
+            res.on('end', function () {
+                var decoded = JSON.parse(buffer);
+                if(decoded.result) {
+                    onSuccessCallback && onSuccessCallback(decoded.result);
+                } else {
+                    onErrorCallback && onErrorCallback(decoded.error);
+                }
+            });
+
+            res.on('error', function (error) {
+                onErrorCallback && onErrorCallback(error);
+            });
+        }
+    };
+}
+
+module.exports = {
+
+    /**
+     * Create JSON-RPC client
+     * @param {String} url Server url
+     * @return {JSONRPCClient} client
+     */
+    create: function (url) {
+        var urlParts = url.match(URL_REGEXP),
+            host = urlParts[2],
+            port = urlParts[4] || urlParts[1] === 'https' ? 443 : 8080,
+            path = urlParts[5],
+            scheme = urlParts[1] || 'http';
+
+        return new JSONRPCClient(scheme, host, port, path);
+    }
+
+};

package.json

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+{
+    "name" : "jsonrpc-client",
+    "version" : "0.0.1",
+    "description" : "A simple JSON-RPC client.",
+    "author" : "Alexander Tarmolov <alexander@tarmolov.ru>",
+    "main" : "./jsonrpc-client.js",
+    "repository" : {
+        "type" : "git",
+        "url" : "http://github.com/tarmolov/node-jsonrpc-client"
+    },
+    "licenses" : [
+        {
+            "type": "AS IS"
+        }
+    ],
+    "engine" : { "node" : ">=0.2.0" }
+}