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| import xs, {Stream, MemoryStream} from 'xstream';
import {Driver} from '@cycle/run';
import {adapt} from '@cycle/run/lib/adapt';
import {MainHTTPSource} from './MainHTTPSource';
import * as superagent from 'superagent';
import {
HTTPSource,
ResponseStream,
RequestOptions,
RequestInput,
Response,
} from './interfaces';
function preprocessReqOptions(reqOptions: RequestOptions): RequestOptions {
reqOptions.withCredentials = reqOptions.withCredentials || false;
reqOptions.redirects =
typeof reqOptions.redirects === 'number' ? reqOptions.redirects : 5;
reqOptions.method = reqOptions.method || `get`;
return reqOptions;
}
export function optionsToSuperagent(rawReqOptions: RequestOptions) {
const reqOptions = preprocessReqOptions(rawReqOptions);
if (typeof reqOptions.url !== `string`) {
throw new Error(
`Please provide a \`url\` property in the request options.`
);
}
const lowerCaseMethod = (reqOptions.method || 'GET').toLowerCase();
const sanitizedMethod =
lowerCaseMethod === `delete` ? `del` : lowerCaseMethod;
let request = superagent[sanitizedMethod](reqOptions.url);
Eif (typeof request.redirects === `function`) {
request = request.redirects(reqOptions.redirects);
}
Iif (reqOptions.type) {
request = request.type(reqOptions.type);
}
if (reqOptions.send) {
request = request.send(reqOptions.send);
}
Iif (reqOptions.accept) {
request = request.accept(reqOptions.accept);
}
if (reqOptions.query) {
request = request.query(reqOptions.query);
}
Iif (reqOptions.withCredentials) {
request = request.withCredentials();
}
Iif (reqOptions.agent) {
request = request.key(reqOptions.agent.key);
request = request.cert(reqOptions.agent.cert);
}
Iif (
typeof reqOptions.user === 'string' &&
typeof reqOptions.password === 'string'
) {
request = request.auth(reqOptions.user, reqOptions.password);
}
Iif (reqOptions.headers) {
for (const key in reqOptions.headers) {
if (reqOptions.headers.hasOwnProperty(key)) {
request = request.set(key, reqOptions.headers[key]);
}
}
}
Iif (reqOptions.field) {
for (const key in reqOptions.field) {
if (reqOptions.field.hasOwnProperty(key)) {
request = request.field(key, reqOptions.field[key]);
}
}
}
Iif (reqOptions.attach) {
for (let i = reqOptions.attach.length - 1; i >= 0; i--) {
const a = reqOptions.attach[i];
request = request.attach(a.name, a.path, a.filename);
}
}
if (reqOptions.responseType) {
request = request.responseType(reqOptions.responseType);
}
Iif (reqOptions.ok) {
request = request.ok(reqOptions.ok);
}
return request;
}
export function createResponse$(reqInput: RequestInput): Stream<Response> {
let request: any;
return xs.create<Response>({
start: function startResponseStream(listener) {
try {
const reqOptions = normalizeRequestInput(reqInput);
request = optionsToSuperagent(reqOptions);
if (reqOptions.progress) {
request = request.on('progress', (res: Response) => {
res.request = reqOptions;
listener.next(res);
});
}
request.end((err: any, res: Response) => {
if (err) {
Eif (err.response) {
err.response.request = reqOptions;
}
listener.error(err);
} else {
res.request = reqOptions;
listener.next(res);
listener.complete();
}
});
} catch (err) {
listener.error(err);
}
},
stop: function stopResponseStream() {
if (request && request.abort) {
request.abort();
request = null;
}
},
});
}
function softNormalizeRequestInput(reqInput: RequestInput): RequestOptions {
let reqOptions: RequestOptions;
try {
reqOptions = normalizeRequestInput(reqInput);
} catch (err) {
reqOptions = {url: 'Error', _error: err};
}
return reqOptions;
}
function normalizeRequestInput(reqInput: RequestInput): RequestOptions {
if (typeof reqInput === 'string') {
return {url: reqInput};
} else if (typeof reqInput === 'object') {
return reqInput;
} else {
throw new Error(
`Observable of requests given to HTTP Driver must emit ` +
`either URL strings or objects with parameters.`
);
}
}
export type ResponseMemoryStream = MemoryStream<Response> & ResponseStream;
function requestInputToResponse$(reqInput: RequestInput): ResponseMemoryStream {
let response$ = createResponse$(reqInput).remember();
const reqOptions = softNormalizeRequestInput(reqInput);
Eif (!reqOptions.lazy) {
response$.addListener({
next: () => {},
error: () => {},
complete: () => {},
});
}
response$ = adapt(response$);
Object.defineProperty(response$, 'request', {
value: reqOptions,
writable: false,
});
return response$ as ResponseMemoryStream;
}
export function makeHTTPDriver(): Driver<Stream<RequestInput>, HTTPSource> {
function httpDriver(
request$: Stream<RequestInput>,
Iname: string = 'HTTP'
): HTTPSource {
const response$$ = request$.map(requestInputToResponse$);
const httpSource = new MainHTTPSource(response$$, name, []);
response$$.addListener({
next: () => {},
error: () => {},
complete: () => {},
});
return httpSource;
}
return httpDriver;
}
|