Clean up rpc and add POST with parameters

package.json

@@ -19,6 +19,7 @@
     "dateformat": "^3.0.2",
     "isomorphic-fetch": "^2.2.1",
     "koa": "^2.6.2",
+    "koa-bodyparser": "^4.2.1",
     "koa-cors": "0.0.16",
     "koa-mount": "^4.0.0",
     "koa-router": "^7.4.0",

server/index.js

@@ -3,6 +3,7 @@ const Router = require('koa-router');
 const Static = require('koa-static');
 const Cors = require('koa-cors');
 const Mount = require('koa-mount');
+const BodyParser = require('koa-bodyparser');
 const path = require('path');
 
 const routePictures = require('./route/pictures');
@@ -20,6 +21,7 @@ routeCBeamRPC(router);
 
 app
   .use(Cors())
+  .use(BodyParser())
   .use(router.routes())
   .use(router.allowedMethods())
   .use(Static(path.resolve(__dirname, '../dist'), {}))

server/route/cbeamRpc.js

@@ -1,16 +1,33 @@
 require('isomorphic-fetch');
 
+const rpcRequest = async (method, params = {}) => {
+  const body = JSON.stringify({
+    jsonrpc: '2.0',
+    id: +new Date(),
+    method,
+    params,
+  });
+  const res = await fetch('http://c-beam.cbrp3.c-base.org:4254/rpc/', {
+    headers: {
+      'content-type': 'application/json',
+    },
+    mode: 'cors',
+    credentials: 'omit',
+    method: 'POST',
+    body,
+  });
+  return res;
+};
+
 module.exports = (router) => {
   router.get('/rpc/:method', async (ctx) => {
-    const res = await fetch('http://c-beam.cbrp3.c-base.org:4254/rpc/', {
-      credentials: 'omit',
-      headers: {
-        'content-type': 'application/json',
-      },
-      body: `{"jsonrpc":"2.0","id":1550009052773,"method":"${ctx.params.method}","params":""}`,
-      method: 'POST',
-      mode: 'cors',
-    });
+    const res = await rpcRequest(ctx.params.method);
+    ctx.assert((res.status === 200), res.status);
+    const body = await res.json();
+    ctx.body = body;
+  });
+  router.post('/rpc/:method', async (ctx) => {
+    const res = await rpcRequest(ctx.params.method, ctx.request.body);
     ctx.assert((res.status === 200), res.status);
     const body = await res.json();
     ctx.body = body;