From ffd2a62c3f7df94365980302fef3bc3376b48182 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Mon, 3 Aug 2020 13:00:48 +0530
Subject: modularize repo, use pnpm, improve typechecking

---
 .../taler-wallet-core/src/headless/NodeHttpLib.ts  | 133 +++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 packages/taler-wallet-core/src/headless/NodeHttpLib.ts

(limited to 'packages/taler-wallet-core/src/headless/NodeHttpLib.ts')

diff --git a/packages/taler-wallet-core/src/headless/NodeHttpLib.ts b/packages/taler-wallet-core/src/headless/NodeHttpLib.ts
new file mode 100644
index 000000000..d109c3b7c
--- /dev/null
+++ b/packages/taler-wallet-core/src/headless/NodeHttpLib.ts
@@ -0,0 +1,133 @@
+/*
+ This file is part of GNU Taler
+ (C) 2019 Taler Systems S.A.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+
+ SPDX-License-Identifier: AGPL3.0-or-later
+*/
+
+/**
+ * Imports.
+ */
+import {
+  Headers,
+  HttpRequestLibrary,
+  HttpRequestOptions,
+  HttpResponse,
+} from "../util/http";
+import { RequestThrottler } from "../util/RequestThrottler";
+import Axios from "axios";
+import { OperationFailedError, makeErrorDetails } from "../operations/errors";
+import { TalerErrorCode } from "../TalerErrorCode";
+
+/**
+ * Implementation of the HTTP request library interface for node.
+ */
+export class NodeHttpLib implements HttpRequestLibrary {
+  private throttle = new RequestThrottler();
+  private throttlingEnabled = true;
+
+  /**
+   * Set whether requests should be throttled.
+   */
+  setThrottling(enabled: boolean): void {
+    this.throttlingEnabled = enabled;
+  }
+
+  private async req(
+    method: "post" | "get",
+    url: string,
+    body: any,
+    opt?: HttpRequestOptions,
+  ): Promise<HttpResponse> {
+    if (this.throttlingEnabled && this.throttle.applyThrottle(url)) {
+      throw Error("request throttled");
+    }
+    const resp = await Axios({
+      method,
+      url: url,
+      responseType: "text",
+      headers: opt?.headers,
+      validateStatus: () => true,
+      transformResponse: (x) => x,
+      data: body,
+    });
+
+    const respText = resp.data;
+    if (typeof respText !== "string") {
+      throw new OperationFailedError(
+        makeErrorDetails(
+          TalerErrorCode.WALLET_RECEIVED_MALFORMED_RESPONSE,
+          "unexpected response type",
+          {
+            httpStatusCode: resp.status,
+            requestUrl: url,
+          },
+        ),
+      );
+    }
+    const makeJson = async (): Promise<any> => {
+      let responseJson;
+      try {
+        responseJson = JSON.parse(respText);
+      } catch (e) {
+        throw new OperationFailedError(
+          makeErrorDetails(
+            TalerErrorCode.WALLET_RECEIVED_MALFORMED_RESPONSE,
+            "invalid JSON",
+            {
+              httpStatusCode: resp.status,
+              requestUrl: url,
+            },
+          ),
+        );
+      }
+      if (responseJson === null || typeof responseJson !== "object") {
+        throw new OperationFailedError(
+          makeErrorDetails(
+            TalerErrorCode.WALLET_RECEIVED_MALFORMED_RESPONSE,
+            "invalid JSON",
+            {
+              httpStatusCode: resp.status,
+              requestUrl: url,
+            },
+          ),
+        );
+      }
+      return responseJson;
+    };
+    const headers = new Headers();
+    for (const hn of Object.keys(resp.headers)) {
+      headers.set(hn, resp.headers[hn]);
+    }
+    return {
+      requestUrl: url,
+      headers,
+      status: resp.status,
+      text: async () => resp.data,
+      json: makeJson,
+    };
+  }
+
+  async get(url: string, opt?: HttpRequestOptions): Promise<HttpResponse> {
+    return this.req("get", url, undefined, opt);
+  }
+
+  async postJson(
+    url: string,
+    body: any,
+    opt?: HttpRequestOptions,
+  ): Promise<HttpResponse> {
+    return this.req("post", url, body, opt);
+  }
+}
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