postchain-client
Version:
Client library for accessing a Postchain node through REST.
127 lines • 5.49 kB
JavaScript
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
import * as logger from "../logger";
import { decodeValue } from "../gtx/serialization";
import { Method } from "./enums";
export function handleRequest(method, path, endpoint, postObject) {
return __awaiter(this, void 0, void 0, function* () {
if (method == Method.GET) {
return yield get(path, endpoint);
}
else {
return yield post(path, endpoint, postObject);
}
});
}
/**
* Sends request to get data from a given API endpoint.
* @param path API endpoint of Rell backend
* @param endpoint
*/
function get(path, endpoint) {
return __awaiter(this, void 0, void 0, function* () {
logger.debug(`GET URL ${new URL(path, endpoint).href}`);
try {
const response = yield fetch(new URL(path, endpoint).href);
const contentType = response.headers.get("Content-Type");
const transactionTimestamp = response.headers.get("X-Transaction-Timestamp");
let rspBody = null;
const error = null;
if (contentType === null || contentType === void 0 ? void 0 : contentType.includes("application/json")) {
rspBody = yield response.json();
}
else if (contentType === null || contentType === void 0 ? void 0 : contentType.includes("text/plain")) {
rspBody = yield response.text();
}
else if (contentType === null || contentType === void 0 ? void 0 : contentType.includes("application/octet-stream")) {
rspBody = yield constructBufferResponseBody(response);
}
return createResponseObject(error, response.status, rspBody, transactionTimestamp);
}
catch (error) {
logger.error(error.message);
return createResponseObject(error, null, null);
}
});
}
/**
* Sends request to post data to a given API endpoint.
* @param path API endpoint of Rell backend
* @param endpoint
* @param requestBody request body
*/
function post(path, endpoint, requestBody) {
return __awaiter(this, void 0, void 0, function* () {
logger.debug(`POST URL ${new URL(path, endpoint).href}`);
logger.debug(`POST body ${JSON.stringify(requestBody)}`);
if (Buffer.isBuffer(requestBody)) {
try {
const requestOptions = {
method: "post",
body: requestBody,
headers: {
Accept: "application/octet-stream",
"Content-Type": "application/octet-stream",
},
};
const response = yield fetch(new URL(path, endpoint).href, requestOptions);
const transactionTimestamp = response.headers.get("X-Transaction-Timestamp");
return createResponseObject(null, response.status, yield constructBufferResponseBody(response), transactionTimestamp);
}
catch (error) {
return createResponseObject(error, null, null);
}
}
else {
try {
const response = yield fetch(new URL(path, endpoint).href, {
method: "post",
body: JSON.stringify(requestBody),
headers: {
Accept: "application/json",
"Content-Type": "application/json",
},
});
const transactionTimestamp = response.headers.get("X-Transaction-Timestamp");
return createResponseObject(null, response.status, yield constructBufferResponseBody(response), transactionTimestamp);
}
catch (error) {
return createResponseObject(error, null, null);
}
}
});
}
function constructBufferResponseBody(response) {
return __awaiter(this, void 0, void 0, function* () {
const contentType = response.headers.get("content-type");
if (contentType === "application/octet-stream") {
const responseBuffer = yield response.arrayBuffer();
const buffer = Buffer.from(responseBuffer);
return decodeValue(buffer);
}
if (contentType === "application/json") {
return yield response.json();
}
const responseText = yield response.text();
return responseText ? responseText : response.statusText;
});
}
function createResponseObject(error, statusCode, rspBody, transactionTimestamp) {
const responseObject = {
error,
statusCode,
rspBody,
};
if (transactionTimestamp) {
responseObject.transactionTimestamp = transactionTimestamp;
}
return responseObject;
}
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