adds headers and means to set them to Lbry

.gitignore

@@ -1,3 +1,7 @@
 /node_modules
 yarn-error.log
 package-lock.json
+
+# Jetbrains
+.idea/
+

dist/bundle.es.js

@@ -606,12 +606,20 @@ const Lbry = {
   isConnected: false,
   connectPromise: null,
   daemonConnectionString: 'http://localhost:5279',
+  apiRequestHeaders: { 'Content-Type': 'application/json-rpc' },
 
   // Allow overriding daemon connection string (e.g. to `/api/proxy` for lbryweb)
   setDaemonConnectionString: value => {
     Lbry.daemonConnectionString = value;
   },
 
+  setApiHeader: (key, value) => {
+    Lbry.apiRequestHeaders = Object.assign(Lbry.apiRequestHeaders, { [key]: value });
+  },
+
+  unsetApiHeader: key => {
+    Object.keys(Lbry.apiRequestHeaders).includes(key) && delete Lbry.apiRequestHeaders['key'];
+  },
   // Allow overriding Lbry methods
   overrides: {},
   setOverride: (methodName, newMethod) => {
@@ -730,6 +738,7 @@ function apiCall(method, params, resolve, reject) {
   const counter = new Date().getTime();
   const options = {
     method: 'POST',
+    headers: Lbry.apiRequestHeaders,
     body: JSON.stringify({
       jsonrpc: '2.0',
       method,

dist/flow-typed/Lbry.js

@@ -153,7 +153,10 @@ declare type LbryTypes = {
   connectPromise: ?Promise<any>,
   connect: () => void,
   daemonConnectionString: string,
+  apiRequestHeaders: {[key: string]: string},
   setDaemonConnectionString: string => void,
+  setApiHeader: (string, string) => void,
+  unsetApiHeader: (string) => void,
   overrides: { [string]: ?Function },
   setOverride: (string, Function) => void,
   getMediaType: (string, ?string) => string,

flow-typed/Lbry.js

@@ -153,7 +153,10 @@ declare type LbryTypes = {
   connectPromise: ?Promise<any>,
   connect: () => void,
   daemonConnectionString: string,
+  apiRequestHeaders: {[key: string]: string},
   setDaemonConnectionString: string => void,
+  setApiHeader: (string, string) => void,
+  unsetApiHeader: (string) => void,
   overrides: { [string]: ?Function },
   setOverride: (string, Function) => void,
   getMediaType: (string, ?string) => string,

src/lbry.js

@@ -11,12 +11,20 @@ const Lbry: LbryTypes = {
   isConnected: false,
   connectPromise: null,
   daemonConnectionString: 'http://localhost:5279',
+  apiRequestHeaders: { 'Content-Type': 'application/json-rpc' },
 
   // Allow overriding daemon connection string (e.g. to `/api/proxy` for lbryweb)
   setDaemonConnectionString: (value: string) => {
     Lbry.daemonConnectionString = value;
   },
 
+  setApiHeader: (key: string, value: string) => {
+    Lbry.apiRequestHeaders = Object.assign(Lbry.apiRequestHeaders, { [key]: value });
+  },
+
+  unsetApiHeader: key => {
+    Object.keys(Lbry.apiRequestHeaders).includes(key) && delete Lbry.apiRequestHeaders['key'];
+  },
   // Allow overriding Lbry methods
   overrides: {},
   setOverride: (methodName, newMethod) => {
@@ -141,6 +149,7 @@ function apiCall(method: string, params: ?{}, resolve: Function, reject: Functio
   const counter = new Date().getTime();
   const options = {
     method: 'POST',
+    headers: Lbry.apiRequestHeaders,
     body: JSON.stringify({
       jsonrpc: '2.0',
       method,