Started implemention of ApiClient using the Node.js HTTP API

Former-commit-id: 5543dbbf39

ccm-apiclient-commons/src/main/typescript/ApiClient.ts

@@ -1,3 +1,5 @@
+import * as http from "http";
+
 /**
  * The interface of a client for the LibreCcm RESTful API.
  */
@@ -373,7 +375,10 @@ export class ApiClientFetchImpl implements LibreCcmApiClient {
     async options(endpoint: string): Promise<ApiResponse> {
         const url = buildUrl(this.#baseUrl, endpoint);
         try {
-            const response = await fetch(url, this.buildFetchOptions("options"));
+            const response = await fetch(
+                url,
+                this.buildFetchOptions("options")
+            );
             if (response.ok) {
                 return new FetchResponse(response);
             } else {
@@ -397,16 +402,108 @@ export class ApiClientFetchImpl implements LibreCcmApiClient {
     }
 }
 
+/**
+ * An implementation of the {@link ApiResponse} for the Node.js HTTP API supported
+ * by browsers.
+ */
+class NodeResponse implements ApiResponse {
+    readonly status: number;
+    readonly statusText: string;
+
+    #data: Buffer;
+
+    constructor(status: number, statusText: string, data: Buffer) {
+        this.status = status;
+        this.statusText = statusText;
+        this.#data = data;
+    }
+
+    json(): Promise<Record<string, unknown>> {
+        return new Promise((resolve, reject) => {
+            try {
+                resolve(this.#data.toJSON());
+            } catch (err) {
+                reject(err);
+            }
+        });
+    }
+
+    arrayBuffer(): Promise<ArrayBuffer> {
+        return new Promise((resolve, reject) => {
+            try {
+                const arrayBuf: ArrayBuffer = this.#data.buffer.slice(
+                    this.#data.byteOffset,
+                    this.#data.byteLength + this.#data.byteLength
+                );
+                resolve(arrayBuf);
+            } catch (err) {
+                reject(err);
+            }
+        });
+    }
+
+    text(): Promise<string> {
+        return new Promise((resolve, reject) => {
+            try {
+                return this.#data.toString();
+            } catch (err) {
+                reject(err);
+            }
+        });
+    }
+}
+
 /**
  * An implementation of the {@link LibreCcmApiClient} interface using the HTTP API
  * provided by node.js.
  */
 export class ApiClientNodeImpl implements LibreCcmApiClient {
+    readonly #baseUrl: string;
+
+    constructor(baseUrl: string) {
+        this.#baseUrl = baseUrl;
+    }
+
     get(
         endpoint: string,
         searchParams?: Record<string, string>
     ): Promise<ApiResponse> {
-        throw "Not implemented yet.";
+        return new Promise((resolve, reject) => {
+            const url = buildUrl(this.#baseUrl, endpoint, searchParams);
+            const request: http.ClientRequest = http.request(url, {
+                headers: {
+                    Authorization: "",
+                },
+                method: "GET",
+            });
+
+            request.on("response", (response) => {
+                const status: number = response.statusCode
+                    ? response.statusCode
+                    : -1;
+                const statusText: string = response.statusMessage
+                    ? response.statusMessage
+                    : "";
+
+                const data: Array<Buffer> = [];
+
+                response.on("data", (chunk: Buffer) => {
+                    data.push(chunk);
+                });
+                response.on("end", () => {
+                    const buffer: Buffer = Buffer.concat(data);
+                    const apiResponse: ApiResponse = new NodeResponse(
+                        status,
+                        statusText,
+                        buffer
+                    );
+                    resolve(apiResponse);
+                });
+            });
+            request.on("error", (error) => reject(error));
+
+            request.end();
+        });
     }
 
     post(