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

---
 .../src/browserHttpLib.ts                          | 129 +++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 packages/taler-wallet-webextension/src/browserHttpLib.ts

(limited to 'packages/taler-wallet-webextension/src/browserHttpLib.ts')

diff --git a/packages/taler-wallet-webextension/src/browserHttpLib.ts b/packages/taler-wallet-webextension/src/browserHttpLib.ts
new file mode 100644
index 000000000..2782e4a14
--- /dev/null
+++ b/packages/taler-wallet-webextension/src/browserHttpLib.ts
@@ -0,0 +1,129 @@
+
+import { httpLib, OperationFailedError, Logger } from "taler-wallet-core";
+import { TalerErrorCode } from "taler-wallet-core/lib/TalerErrorCode";
+
+const logger = new Logger("browserHttpLib");
+
+/**
+ * An implementation of the [[HttpRequestLibrary]] using the
+ * browser's XMLHttpRequest.
+ */
+export class BrowserHttpLib implements httpLib.HttpRequestLibrary {
+  private req(
+    method: string,
+    url: string,
+    requestBody?: any,
+    options?: httpLib.HttpRequestOptions,
+  ): Promise<httpLib.HttpResponse> {
+    return new Promise<httpLib.HttpResponse>((resolve, reject) => {
+      const myRequest = new XMLHttpRequest();
+      myRequest.open(method, url);
+      if (options?.headers) {
+        for (const headerName in options.headers) {
+          myRequest.setRequestHeader(headerName, options.headers[headerName]);
+        }
+      }
+      myRequest.setRequestHeader;
+      if (requestBody) {
+        myRequest.send(requestBody);
+      } else {
+        myRequest.send();
+      }
+
+      myRequest.onerror = (e) => {
+        logger.error("http request error");
+        reject(
+          OperationFailedError.fromCode(
+            TalerErrorCode.WALLET_NETWORK_ERROR,
+            "Could not make request",
+            {
+              requestUrl: url,
+            },
+          ),
+        );
+      };
+
+      myRequest.addEventListener("readystatechange", (e) => {
+        if (myRequest.readyState === XMLHttpRequest.DONE) {
+          if (myRequest.status === 0) {
+            const exc = OperationFailedError.fromCode(
+              TalerErrorCode.WALLET_NETWORK_ERROR,
+              "HTTP request failed (status 0, maybe URI scheme was wrong?)",
+              {
+                requestUrl: url,
+              },
+            );
+            reject(exc);
+            return;
+          }
+          const makeJson = async (): Promise<any> => {
+            let responseJson;
+            try {
+              responseJson = JSON.parse(myRequest.responseText);
+            } catch (e) {
+              throw OperationFailedError.fromCode(
+                TalerErrorCode.WALLET_RECEIVED_MALFORMED_RESPONSE,
+                "Invalid JSON from HTTP response",
+                {
+                  requestUrl: url,
+                  httpStatusCode: myRequest.status,
+                },
+              );
+            }
+            if (responseJson === null || typeof responseJson !== "object") {
+              throw OperationFailedError.fromCode(
+                TalerErrorCode.WALLET_RECEIVED_MALFORMED_RESPONSE,
+                "Invalid JSON from HTTP response",
+                {
+                  requestUrl: url,
+                  httpStatusCode: myRequest.status,
+                },
+              );
+            }
+            return responseJson;
+          };
+
+          const headers = myRequest.getAllResponseHeaders();
+          const arr = headers.trim().split(/[\r\n]+/);
+
+          // Create a map of header names to values
+          const headerMap: httpLib.Headers = new httpLib.Headers();
+          arr.forEach(function (line) {
+            const parts = line.split(": ");
+            const headerName = parts.shift();
+            if (!headerName) {
+              logger.warn("skipping invalid header");
+              return;
+            }
+            const value = parts.join(": ");
+            headerMap.set(headerName, value);
+          });
+          const resp: httpLib.HttpResponse = {
+            requestUrl: url,
+            status: myRequest.status,
+            headers: headerMap,
+            json: makeJson,
+            text: async () => myRequest.responseText,
+          };
+          resolve(resp);
+        }
+      });
+    });
+  }
+
+  get(url: string, opt?: httpLib.HttpRequestOptions): Promise<httpLib.HttpResponse> {
+    return this.req("get", url, undefined, opt);
+  }
+
+  postJson(
+    url: string,
+    body: unknown,
+    opt?: httpLib.HttpRequestOptions,
+  ): Promise<httpLib.HttpResponse> {
+    return this.req("post", url, JSON.stringify(body), opt);
+  }
+
+  stop(): void {
+    // Nothing to do
+  }
+}
\ No newline at end of file
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