ReadableStream parse input (#3)

deno.json

@@ -1,6 +1,6 @@
 {
   "name": "@dbushell/xml-streamify",
-  "version": "0.5.0",
+  "version": "0.6.0",
   "exports": {
     ".": "./mod.ts",
     "./node": "./src/node.ts",

examples/deno.ts

@@ -17,7 +17,8 @@ const blog = async () => {
 
 const podcast = async () => {
   const contoller = new AbortController();
-  const parser = parse('https://feed.syntax.fm/rss', {
+  const response = await fetch('https://feed.syntax.fm/rss');
+  const parser = parse(response.body!, {
     signal: contoller.signal
   });
   const items: Node[] = [];

src/parse.ts

@@ -16,29 +16,36 @@ const ignoreTypes: Partial<Record<NodeType, keyof ParseOptions>> = {
 
 /**
  * Async generator function for parsing a streamed XML document
- * @param url      URL to fetch and parse
+ * @param input    URL to fetch and parse (or a ReadableStream)
  * @param options  Parsing options {@link ParseOptions}
  * @returns Yields parsed XML nodes {@link Node}
  */
 export async function* parse(
-  url: string | URL,
+  input: string | URL | ReadableStream,
   options?: ParseOptions
 ): AsyncGenerator<Node, Node | void, void> {
-  url = new URL(url);
-
   const document = new Node('@document');
-
   try {
     const init = {...options?.fetchOptions};
     if (options?.signal) {
       init.signal = options.signal;
     }
-    const response = await fetch(url, init);
-    if (!response.ok || !response.body) {
-      throw new Error(`Bad response`);
+
+    let source: ReadableStream;
+
+    // Fetch stream if URL is provided as input
+    if (typeof input === 'string' || input instanceof URL) {
+      input = new URL(input);
+      const response = await fetch(input, init);
+      if (!response.ok || !response.body) {
+        throw new Error(`Bad response`);
+      }
+      source = response.body;
+    } else {
+      source = input;
     }
 
-    const stream = response.body
+    const stream = source
       .pipeThrough(new TextDecoderStream())
       .pipeThrough(new XMLStream(), {
         signal: options?.signal