smartrequest/ts/smartrequest.request.ts

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import * as https from 'https';
import * as plugins from './smartrequest.plugins';
import * as interfaces from './smartrequest.interfaces';
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import { IncomingMessage } from 'http';
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export interface IExtendedIncomingMessage extends IncomingMessage {
body: any;
}
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const buildUtf8Response = (
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incomingMessageArg: IncomingMessage,
autoJsonParse = true
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): Promise<IExtendedIncomingMessage> => {
let done = plugins.smartpromise.defer<IExtendedIncomingMessage>();
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// Continuously update stream with data
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let body = '';
incomingMessageArg.on('data', function(chunkArg) {
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body += chunkArg;
});
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incomingMessageArg.on('end', function() {
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if (autoJsonParse) {
try {
(incomingMessageArg as IExtendedIncomingMessage).body = JSON.parse(body);
} catch (err) {
(incomingMessageArg as IExtendedIncomingMessage).body = body;
}
} else {
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(incomingMessageArg as IExtendedIncomingMessage).body = body;
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}
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done.resolve(incomingMessageArg as IExtendedIncomingMessage);
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});
return done.promise;
};
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/**
* determine wether a url is a unix sock
* @param urlArg
*/
const testForUnixSock = (urlArg: string): boolean => {
const unixRegex = /^(http:\/\/|https:\/\/|)unix:/;
return unixRegex.test(urlArg);
};
/**
* determine socketPath and path for unixsock
*/
const parseSocketPathAndRoute = (stringToParseArg: string) => {
const parseRegex = /(.*):(.*)/;
const result = parseRegex.exec(stringToParseArg);
return {
socketPath: result[1],
path: result[2]
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};
};
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export let request = async (
domainArg: string,
optionsArg: interfaces.ISmartRequestOptions = {},
streamArg: boolean = false
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): Promise<IExtendedIncomingMessage> => {
let done = plugins.smartpromise.defer<any>();
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// merge options
const defaultOptions: interfaces.ISmartRequestOptions = {
autoJsonParse: true
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};
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optionsArg = {
...defaultOptions,
...optionsArg
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};
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// parse url
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let parsedUrl: plugins.url.Url;
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parsedUrl = plugins.url.parse(domainArg);
optionsArg.hostname = parsedUrl.hostname;
if (parsedUrl.port) {
optionsArg.port = parseInt(parsedUrl.port);
}
optionsArg.path = parsedUrl.path;
// determine if unixsock
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if (testForUnixSock(domainArg)) {
const detailedUnixPath = parseSocketPathAndRoute(optionsArg.path);
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optionsArg.socketPath = detailedUnixPath.socketPath;
optionsArg.path = detailedUnixPath.path;
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}
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// lets determine the request module to use
const requestModule = (() => {
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if (parsedUrl.protocol === 'https:') {
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return plugins.https;
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} else if (parsedUrl.protocol === 'http:') {
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return plugins.http;
} else {
throw new Error(`unsupported protocol: ${parsedUrl.protocol}`);
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}
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})() as typeof plugins.https;
// lets perform the actual request
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let request = requestModule.request(optionsArg);
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// lets write the requestBody
if (optionsArg.requestBody) {
if (!(optionsArg.requestBody instanceof plugins.formData)) {
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if (typeof optionsArg.requestBody !== 'string') {
optionsArg.requestBody = JSON.stringify(optionsArg.requestBody);
}
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request.write(optionsArg.requestBody);
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request.end();
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} else if (optionsArg.requestBody instanceof plugins.formData) {
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optionsArg.requestBody.pipe(request).on('finish', event => {
request.end();
});
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}
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} else {
request.end();
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}
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// lets handle an error
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request.on('error', e => {
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console.error(e);
});
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// lets handle the response
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request.on('response', async response => {
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if (streamArg) {
done.resolve(response);
} else {
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const builtResponse = await buildUtf8Response(response, optionsArg.autoJsonParse);
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done.resolve(builtResponse);
}
});
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const result = await done.promise;
return result;
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};