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joplin/packages/lib/ClipperServer.js
2020-11-05 16:58:23 +00:00

232 lines
6.1 KiB
JavaScript

const urlParser = require('url');
const Setting = require('./models/Setting').default;
const Logger = require('./Logger').default;
const { randomClipperPort, startPort } = require('./randomClipperPort');
const enableServerDestroy = require('server-destroy');
const Api = require('./services/rest/Api').default;
const ApiResponse = require('./services/rest/ApiResponse').default;
const multiparty = require('multiparty');
class ClipperServer {
constructor() {
this.logger_ = new Logger();
this.startState_ = 'idle';
this.server_ = null;
this.port_ = null;
}
static instance() {
if (this.instance_) return this.instance_;
this.instance_ = new ClipperServer();
return this.instance_;
}
initialize(actionApi = null) {
this.api_ = new Api(() => {
return Setting.value('api.token');
}, actionApi);
}
setLogger(l) {
this.logger_ = l;
}
logger() {
return this.logger_;
}
setDispatch(d) {
this.dispatch_ = d;
}
dispatch(action) {
if (!this.dispatch_) throw new Error('dispatch not set!');
this.dispatch_(action);
}
setStartState(v) {
if (this.startState_ === v) return;
this.startState_ = v;
this.dispatch({
type: 'CLIPPER_SERVER_SET',
startState: v,
});
}
setPort(v) {
if (this.port_ === v) return;
this.port_ = v;
this.dispatch({
type: 'CLIPPER_SERVER_SET',
port: v,
});
}
async findAvailablePort() {
const tcpPortUsed = require('tcp-port-used');
let state = null;
for (let i = 0; i < 10000; i++) {
state = randomClipperPort(state, Setting.value('env'));
const inUse = await tcpPortUsed.check(state.port);
if (!inUse) return state.port;
}
throw new Error('All potential ports are in use or not available.');
}
async isRunning() {
const tcpPortUsed = require('tcp-port-used');
const port = Setting.value('api.port') ? Setting.value('api.port') : startPort(Setting.value('env'));
const inUse = await tcpPortUsed.check(port);
return inUse ? port : 0;
}
async start() {
this.setPort(null);
this.setStartState('starting');
const settingPort = Setting.value('api.port');
try {
const p = settingPort ? settingPort : await this.findAvailablePort();
this.setPort(p);
} catch (error) {
this.setStartState('idle');
this.logger().error(error);
return;
}
this.server_ = require('http').createServer();
this.server_.on('request', async (request, response) => {
const writeCorsHeaders = (code, contentType = 'application/json', additionalHeaders = null) => {
const headers = Object.assign(
{},
{
'Content-Type': contentType,
'Access-Control-Allow-Origin': '*',
'Access-Control-Allow-Methods': 'GET, POST, OPTIONS, PUT, PATCH, DELETE',
'Access-Control-Allow-Headers': 'X-Requested-With,content-type',
},
additionalHeaders ? additionalHeaders : {}
);
response.writeHead(code, headers);
};
const writeResponseJson = (code, object) => {
writeCorsHeaders(code);
response.write(JSON.stringify(object));
response.end();
};
const writeResponseText = (code, text) => {
writeCorsHeaders(code, 'text/plain');
response.write(text);
response.end();
};
const writeResponseInstance = (code, instance) => {
if (instance.type === 'attachment') {
const filename = instance.attachmentFilename ? instance.attachmentFilename : 'file';
writeCorsHeaders(code, instance.contentType ? instance.contentType : 'application/octet-stream', {
'Content-disposition': `attachment; filename=${filename}`,
'Content-Length': instance.body.length,
});
response.end(instance.body);
} else {
throw new Error('Not implemented');
}
};
const writeResponse = (code, response) => {
if (response instanceof ApiResponse) {
writeResponseInstance(code, response);
} else if (typeof response === 'string') {
writeResponseText(code, response);
} else if (response === null || response === undefined) {
writeResponseText(code, '');
} else {
writeResponseJson(code, response);
}
};
this.logger().info(`Request: ${request.method} ${request.url}`);
const url = urlParser.parse(request.url, true);
const execRequest = async (request, body = '', files = []) => {
try {
const response = await this.api_.route(request.method, url.pathname, url.query, body, files);
writeResponse(200, response);
} catch (error) {
this.logger().error(error);
const httpCode = error.httpCode ? error.httpCode : 500;
const msg = [];
if (httpCode >= 500) msg.push('Internal Server Error');
if (error.message) msg.push(error.message);
if (error.stack) msg.push(`\n\n${error.stack}`);
writeResponse(httpCode, { error: msg.join(': ') });
}
};
const contentType = request.headers['content-type'] ? request.headers['content-type'] : '';
if (request.method === 'OPTIONS') {
writeCorsHeaders(200);
response.end();
} else {
if (contentType.indexOf('multipart/form-data') === 0) {
const form = new multiparty.Form();
form.parse(request, function(error, fields, files) {
if (error) {
writeResponse(error.httpCode ? error.httpCode : 500, error.message);
return;
} else {
execRequest(request, fields && fields.props && fields.props.length ? fields.props[0] : '', files && files.data ? files.data : []);
}
});
} else {
if (request.method === 'POST' || request.method === 'PUT') {
let body = '';
request.on('data', data => {
body += data;
});
request.on('end', async () => {
execRequest(request, body);
});
} else {
execRequest(request);
}
}
}
});
enableServerDestroy(this.server_);
this.logger().info(`Starting Clipper server on port ${this.port_}`);
this.server_.listen(this.port_, '127.0.0.1');
this.setStartState('started');
// We return an empty promise that never resolves so that it's possible to `await` the server indefinitely.
// This is used only in command-server.js
return new Promise(() => {});
}
async stop() {
this.server_.destroy();
this.server_ = null;
this.setStartState('idle');
this.setPort(null);
}
}
module.exports = ClipperServer;