ESM: Ported Punycode, HTTP and PRNG operations

src/core/operations/HTTPRequest.mjs

@@ -0,0 +1,146 @@
+/**
+ * @author tlwr [toby@toby.codes]
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import OperationError from "../errors/OperationError";
+
+/**
+ * HTTP request operation
+ */
+class HTTPRequest extends Operation {
+
+    /**
+     * HTTPRequest constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "HTTP request";
+        this.module = "Default";
+        this.description = [
+            "Makes an HTTP request and returns the response.",
+            "<br><br>",
+            "This operation supports different HTTP verbs like GET, POST, PUT, etc.",
+            "<br><br>",
+            "You can add headers line by line in the format <code>Key: Value</code>",
+            "<br><br>",
+            "The status code of the response, along with a limited selection of exposed headers, can be viewed by checking the 'Show response metadata' option. Only a limited set of response headers are exposed by the browser for security reasons.",
+        ].join("\n");
+        this.inputType = "string";
+        this.outputType = "string";
+        this.manualBake = true;
+        this.args = [
+            {
+                "name": "Method",
+                "type": "option",
+                "value": [
+                    "GET", "POST", "HEAD",
+                    "PUT", "PATCH", "DELETE",
+                    "CONNECT", "TRACE", "OPTIONS"
+                ]
+            },
+            {
+                "name": "URL",
+                "type": "string",
+                "value": ""
+            },
+            {
+                "name": "Headers",
+                "type": "text",
+                "value": ""
+            },
+            {
+                "name": "Mode",
+                "type": "option",
+                "value": [
+                    "Cross-Origin Resource Sharing",
+                    "No CORS (limited to HEAD, GET or POST)",
+                ]
+            },
+            {
+                "name": "Show response metadata",
+                "type": "boolean",
+                "value": false
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const [method, url, headersText, mode, showResponseMetadata] = args;
+
+        if (url.length === 0) return "";
+
+        const headers = new Headers();
+        headersText.split(/\r?\n/).forEach(line => {
+            line = line.trim();
+
+            if (line.length === 0) return;
+
+            const split = line.split(":");
+            if (split.length !== 2) throw `Could not parse header in line: ${line}`;
+
+            headers.set(split[0].trim(), split[1].trim());
+        });
+
+        const config = {
+            method: method,
+            headers: headers,
+            mode: modeLookup[mode],
+            cache: "no-cache",
+        };
+
+        if (method !== "GET" && method !== "HEAD") {
+            config.body = input;
+        }
+
+        return fetch(url, config)
+            .then(r => {
+                if (r.status === 0 && r.type === "opaque") {
+                    throw new OperationError("Error: Null response. Try setting the connection mode to CORS.");
+                }
+
+                if (showResponseMetadata) {
+                    let headers = "";
+                    for (const pair of r.headers.entries()) {
+                        headers += "    " + pair[0] + ": " + pair[1] + "\n";
+                    }
+                    return r.text().then(b => {
+                        return "####\n  Status: " + r.status + " " + r.statusText +
+                            "\n  Exposed headers:\n" + headers + "####\n\n" + b;
+                    });
+                }
+                return r.text();
+            })
+            .catch(e => {
+                throw new OperationError(e.toString() +
+                    "\n\nThis error could be caused by one of the following:\n" +
+                    " - An invalid URL\n" +
+                    " - Making a request to an insecure resource (HTTP) from a secure source (HTTPS)\n" +
+                    " - Making a cross-origin request to a server which does not support CORS\n");
+            });
+    }
+
+}
+
+
+/**
+ * Lookup table for HTTP modes
+ *
+ * @private
+ */
+const modeLookup = {
+    "Cross-Origin Resource Sharing": "cors",
+    "No CORS (limited to HEAD, GET or POST)": "no-cors",
+};
+
+
+export default HTTPRequest;