miniobrowser: Bring Minio browser source into minio repo. (#3617)

browser/app/js/jsonrpc.js

@@ -0,0 +1,91 @@
+/*
+ * Minio Browser (C) 2016 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import SuperAgent from 'superagent-es6-promise';
+import url from 'url'
+import Moment from 'moment'
+
+export default class JSONrpc {
+  constructor(params) {
+    this.endpoint = params.endpoint
+    this.namespace = params.namespace
+    this.version = '2.0';
+    const parsedUrl = url.parse(this.endpoint)
+    this.host = parsedUrl.hostname
+    this.path = parsedUrl.path
+    this.port = parsedUrl.port
+
+    switch (parsedUrl.protocol) {
+      case 'http:': {
+        this.scheme = 'http'
+        if (parsedUrl.port === 0) {
+          this.port = 80
+        }
+        break
+      }
+      case 'https:': {
+        this.scheme = 'https'
+        if (parsedUrl.port === 0) {
+          this.port = 443
+        }
+        break
+      }
+      default: {
+        throw new Error('Unknown protocol: ' + parsedUrl.protocol)
+      }
+    }
+  }
+  // call('Get', {id: NN, params: [...]}, function() {})
+  call(method, options, token) {
+    if (!options) {
+      options = {}
+    }
+    if (!options.id) {
+      options.id = 1;
+    }
+    if (!options.params) {
+      options.params = {};
+    }
+    const dataObj = {
+      id: options.id,
+      jsonrpc: this.version,
+      params: options.params ? options.params : {},
+      method: this.namespace ? this.namespace + '.' + method : method
+    }
+    let requestParams = {
+      host: this.host,
+      port: this.port,
+      path: this.path,
+      scheme: this.scheme,
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+        'x-amz-date': Moment().utc().format('YYYYMMDDTHHmmss') + 'Z'
+      }
+    }
+
+    if (token) {
+      requestParams.headers.Authorization = 'Bearer ' + token
+    }
+
+    let req = SuperAgent.post(this.endpoint)
+    for (let key in requestParams.headers) {
+      req.set(key, requestParams.headers[key])
+    }
+    // req.set('Access-Control-Allow-Origin', 'http://localhost:8080')
+    return req.send(JSON.stringify(dataObj)).then(res => res)
+  }
+}