前端代码

node_modules/engine.io-client/build/esm/transports/polling-fetch.js

@@ -0,0 +1,56 @@
+import { Polling } from "./polling.js";
+/**
+ * HTTP long-polling based on the built-in `fetch()` method.
+ *
+ * Usage: browser, Node.js (since v18), Deno, Bun
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/fetch
+ * @see https://caniuse.com/fetch
+ * @see https://nodejs.org/api/globals.html#fetch
+ */
+export class Fetch extends Polling {
+    doPoll() {
+        this._fetch()
+            .then((res) => {
+            if (!res.ok) {
+                return this.onError("fetch read error", res.status, res);
+            }
+            res.text().then((data) => this.onData(data));
+        })
+            .catch((err) => {
+            this.onError("fetch read error", err);
+        });
+    }
+    doWrite(data, callback) {
+        this._fetch(data)
+            .then((res) => {
+            if (!res.ok) {
+                return this.onError("fetch write error", res.status, res);
+            }
+            callback();
+        })
+            .catch((err) => {
+            this.onError("fetch write error", err);
+        });
+    }
+    _fetch(data) {
+        var _a;
+        const isPost = data !== undefined;
+        const headers = new Headers(this.opts.extraHeaders);
+        if (isPost) {
+            headers.set("content-type", "text/plain;charset=UTF-8");
+        }
+        (_a = this.socket._cookieJar) === null || _a === void 0 ? void 0 : _a.appendCookies(headers);
+        return fetch(this.uri(), {
+            method: isPost ? "POST" : "GET",
+            body: isPost ? data : null,
+            headers,
+            credentials: this.opts.withCredentials ? "include" : "omit",
+        }).then((res) => {
+            var _a;
+            // @ts-ignore getSetCookie() was added in Node.js v19.7.0
+            (_a = this.socket._cookieJar) === null || _a === void 0 ? void 0 : _a.parseCookies(res.headers.getSetCookie());
+            return res;
+        });
+    }
+}