Added error handling and CORS support

Author: n1474335

src/core/config/Categories.js

@@ -126,6 +126,7 @@ const Categories = [
     {
         name: "Networking",
         ops: [
+            "HTTP request",
             "Strip HTTP headers",
             "Parse User Agent",
             "Parse IP range",
@@ -288,6 +289,8 @@ const Categories = [
             "Scan for Embedded Files",
             "Generate UUID",
             "Render Image",
+            "Remove EXIF",
+            "Extract EXIF",
             "Numberwang",
         ]
     },

src/core/config/OperationConfig.js

@@ -3370,7 +3370,7 @@ const OperationConfig = {
             "<br><br>",
             "EXIF data from photos usually contains information about the image file itself as well as the device used to create it.",
         ].join("\n"),
-        run: Image.runEXIF,
+        run: Image.runExtractEXIF,
         inputType: "byteArray",
         outputType: "string",
         args: [],
@@ -3388,9 +3388,20 @@ const OperationConfig = {
             }
         ]
     },
+    "Remove EXIF": {
+        description: [
+            "Removes EXIF data from a JPEG image.",
+            "<br><br>",
+            "EXIF data embedded in photos usually contains information about the image file itself as well as the device used to create it.",
+        ].join("\n"),
+        run: Image.runRemoveEXIF,
+        inputType: "byteArray",
+        outputType: "byteArray",
+        args: []
+    },
     "HTTP request": {
         description: [
-            "Makes a HTTP request and returns the response body.",
+            "Makes an HTTP request and returns the response.",
             "<br><br>",
             "This operation supports different HTTP verbs like GET, POST, PUT, etc.",
             "<br><br>",
@@ -3401,24 +3412,33 @@ const OperationConfig = {
         run: HTTP.runHTTPRequest,
         inputType: "string",
         outputType: "string",
+        manualBake: true,
         args: [
             {
                 name: "Method",
                 type: "option",
                 value: HTTP.METHODS,
-            }, {
+            },
+            {
                 name: "URL",
                 type: "string",
                 value: "",
-            }, {
+            },
+            {
                 name: "Headers",
                 type: "text",
                 value: "",
-            }, {
-                name: "Ignore status code",
+            },
+            {
+                name: "Mode",
+                type: "option",
+                value: HTTP.MODE,
+            },
+            {
+                name: "Show response metadata",
                 type: "boolean",
                 value: false,
-            },
+            }
         ]
     },
 };

src/core/operations/HTTP.js

@@ -11,15 +11,18 @@ import {UAS_parser as UAParser} from "../lib/uas_parser.js";
  * @namespace
  */
 const HTTP = {
+
     /**
      * @constant
      * @default
      */
     METHODS: [
         "GET", "POST", "HEAD",
         "PUT", "PATCH", "DELETE",
+        "CONNECT", "TRACE", "OPTIONS"
     ],
 
+
     /**
      * Strip HTTP headers operation.
      *
@@ -60,9 +63,31 @@ const HTTP = {
     },
 
 
+    /**
+     * @constant
+     * @default
+     */
+    MODE: [
+        "Cross-Origin Resource Sharing",
+        "No CORS (limited to HEAD, GET or POST)",
+    ],
+
+    /**
+     * Lookup table for HTTP modes
+     *
+     * @private
+     * @constant
+     */
+    _modeLookup: {
+        "Cross-Origin Resource Sharing": "cors",
+        "No CORS (limited to HEAD, GET or POST)": "no-cors",
+    },
+
     /**
      * HTTP request operation.
      *
+     * @author tlwr [[email protected]]
+     * @author n1474335 [[email protected]]
      * @param {string} input
      * @param {Object[]} args
      * @returns {string}
@@ -71,7 +96,8 @@ const HTTP = {
         const method = args[0],
             url = args[1],
             headersText = args[2],
-            ignoreStatusCode = args[3];
+            mode = args[3],
+            showResponseMetadata = args[4];
 
         if (url.length === 0) return "";
 
@@ -88,9 +114,9 @@ const HTTP = {
         });
 
         let config = {
-            method,
-            headers,
-            mode: "cors",
+            method: method,
+            headers: headers,
+            mode: HTTP._modeLookup[mode],
             cache: "no-cache",
         };
 
@@ -100,11 +126,23 @@ const HTTP = {
 
         return fetch(url, config)
         .then(r => {
-            if (ignoreStatusCode || r.status === 200) {
-                return r.text();
-            } else {
-                throw `HTTP response code was ${r.status}.`;
+            if (showResponseMetadata) {
+                let headers = "";
+                for (let 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 => {
+            return e.toString() +
+                "\n\nThis error could be caused by one of the following:\n" +
+                " - An invalid URL\n" +
+                " - Making a cross-origin request to a server which does not support CORS\n";
         });
     },