strfry can send multiple messages at once (!!)

README.md

@@ -34,10 +34,9 @@ import {
   rateLimitPolicy,
   readStdin,
   writeStdout,
-} from 'https://gitlab.com/soapbox-pub/strfry-policies/-/raw/develop/mod.ts';
-
-const msg = await readStdin();
+} from './mod.ts';
 
+for await (const msg of readStdin()) {
   const result = await pipeline(msg, [
     [hellthreadPolicy, { limit: 100 }],
     [antiDuplicationPolicy, { ttl: 60000, minLength: 50 }],
@@ -45,6 +44,8 @@ const result = await pipeline(msg, [
   ]);
 
   writeStdout(result);
+}
+
 ```
 
 Finally, edit `strfry.conf` and enable the policy:
@@ -110,15 +111,14 @@ Once you're done, you can either upload the file somewhere online or directly to
 ```diff
 --- a/strfry-policy.ts
 +++ b/strfry-policy.ts
-@@ -9,6 +9,7 @@ import {
+@@ -8,12 +8,14 @@ import {
    readStdin,
    writeStdout,
- } from 'https://gitlab.com/soapbox-pub/strfry-policies/-/raw/develop/mod.ts';
+ } from './mod.ts';
 +import { americanPolicy } from 'https://gist.githubusercontent.com/alexgleason/5c2d084434fa0875397f44da198f4352/raw/3d3ce71c7ed9cef726f17c3a102c378b81760a45/american-policy.ts';
  
- const msg = await readStdin();
- 
-@@ -17,6 +18,7 @@ const result = await pipeline(msg, [
+ for await (const msg of readStdin()) {
+   const result = await pipeline(msg, [
      [hellthreadPolicy, { limit: 100 }],
      [antiDuplicationPolicy, { ttl: 60000, minLength: 50 }],
      [rateLimitPolicy, { whitelist: ['127.0.0.1'] }],

entrypoint.example.ts

@@ -10,8 +10,7 @@ import {
   writeStdout,
 } from './mod.ts';
 
-const msg = await readStdin();
-
+for await (const msg of readStdin()) {
   const result = await pipeline(msg, [
     noopPolicy,
     [hellthreadPolicy, { limit: 100 }],
@@ -20,3 +19,4 @@ const result = await pipeline(msg, [
   ]);
 
   writeStdout(result);
+}

src/io.ts

@@ -3,12 +3,13 @@ import { readLines } from './deps.ts';
 import type { InputMessage, OutputMessage } from './types.ts';
 
 /**
- * Get the first line from stdin.
- * Can only be read ONCE, or else it returns undefined.
+ * Parse strfy messages from stdin.
+ * strfry may batch multiple messages at once.
  */
-async function readStdin(): Promise<InputMessage> {
-  const { value } = await readLines(Deno.stdin).next();
-  return JSON.parse(value);
+async function* readStdin(): AsyncGenerator<InputMessage> {
+  for await (const line of readLines(Deno.stdin)) {
+    yield JSON.parse(line);
+  }
 }
 
 /** Writes the output message to stdout. */