129 lines
3.9 KiB
TypeScript
129 lines
3.9 KiB
TypeScript
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import { httpLib, OperationFailedError, Logger } from "taler-wallet-core";
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import { TalerErrorCode } from "taler-wallet-core/lib/TalerErrorCode";
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const logger = new Logger("browserHttpLib");
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/**
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* An implementation of the [[HttpRequestLibrary]] using the
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* browser's XMLHttpRequest.
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*/
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export class BrowserHttpLib implements httpLib.HttpRequestLibrary {
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private req(
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method: string,
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url: string,
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requestBody?: any,
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options?: httpLib.HttpRequestOptions,
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): Promise<httpLib.HttpResponse> {
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return new Promise<httpLib.HttpResponse>((resolve, reject) => {
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const myRequest = new XMLHttpRequest();
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myRequest.open(method, url);
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if (options?.headers) {
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for (const headerName in options.headers) {
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myRequest.setRequestHeader(headerName, options.headers[headerName]);
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}
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}
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myRequest.setRequestHeader;
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if (requestBody) {
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myRequest.send(requestBody);
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} else {
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myRequest.send();
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}
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myRequest.onerror = (e) => {
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logger.error("http request error");
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reject(
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OperationFailedError.fromCode(
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TalerErrorCode.WALLET_NETWORK_ERROR,
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"Could not make request",
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{
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requestUrl: url,
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},
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),
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);
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};
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myRequest.addEventListener("readystatechange", (e) => {
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if (myRequest.readyState === XMLHttpRequest.DONE) {
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if (myRequest.status === 0) {
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const exc = OperationFailedError.fromCode(
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TalerErrorCode.WALLET_NETWORK_ERROR,
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"HTTP request failed (status 0, maybe URI scheme was wrong?)",
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{
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requestUrl: url,
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},
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);
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reject(exc);
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return;
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}
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const makeJson = async (): Promise<any> => {
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let responseJson;
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try {
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responseJson = JSON.parse(myRequest.responseText);
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} catch (e) {
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throw OperationFailedError.fromCode(
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TalerErrorCode.WALLET_RECEIVED_MALFORMED_RESPONSE,
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"Invalid JSON from HTTP response",
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{
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requestUrl: url,
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httpStatusCode: myRequest.status,
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},
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);
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}
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if (responseJson === null || typeof responseJson !== "object") {
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throw OperationFailedError.fromCode(
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TalerErrorCode.WALLET_RECEIVED_MALFORMED_RESPONSE,
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"Invalid JSON from HTTP response",
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{
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requestUrl: url,
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httpStatusCode: myRequest.status,
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},
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);
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}
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return responseJson;
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};
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const headers = myRequest.getAllResponseHeaders();
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const arr = headers.trim().split(/[\r\n]+/);
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// Create a map of header names to values
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const headerMap: httpLib.Headers = new httpLib.Headers();
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arr.forEach(function (line) {
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const parts = line.split(": ");
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const headerName = parts.shift();
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if (!headerName) {
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logger.warn("skipping invalid header");
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return;
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}
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const value = parts.join(": ");
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headerMap.set(headerName, value);
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});
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const resp: httpLib.HttpResponse = {
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requestUrl: url,
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status: myRequest.status,
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headers: headerMap,
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json: makeJson,
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text: async () => myRequest.responseText,
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};
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resolve(resp);
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}
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});
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});
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}
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get(url: string, opt?: httpLib.HttpRequestOptions): Promise<httpLib.HttpResponse> {
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return this.req("get", url, undefined, opt);
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}
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postJson(
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url: string,
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body: unknown,
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opt?: httpLib.HttpRequestOptions,
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): Promise<httpLib.HttpResponse> {
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return this.req("post", url, JSON.stringify(body), opt);
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}
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stop(): void {
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// Nothing to do
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}
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} |