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1yefuwang1 avatar 1yefuwang1 commented on July 1, 2024

Instead of using pipeTo API, I decide to go with reader API with the following code because it gives me a chance to handle EOF. But it seems EOF is not signaled by returning done=true.

import { writeAll } from "jsr:@std/io";

const conn = await Deno.connectTls({ hostname: "www.google.com", port: 443 });
await writeAll(conn, new TextEncoder().encode("GET / HTTP/1.0\r\n\r\n"));
// await conn.readable.pipeTo(Deno.stdout.writable);

const reader = conn.readable.getReader(/*{ mode: "byob" }*/);

while (true) {
  const {done, value} = await reader.read(); // throws UnexpectedEof instead of returning done as true.
  if (done) {
    if (value) {
      await writeAll(Deno.stdout, value);
    }
    console.log(`done`);
    break;
  }
  await writeAll(Deno.stdout, value);
}

Callstack:

error: Uncaught (in promise) UnexpectedEof: unexpected end of file
  const {done, value} = await reader.read();
                                     ^
    at Object.pull (ext:deno_web/06_streams.js:996:30)
    at Module.invokeCallbackFunction (ext:deno_webidl/00_webidl.js:946:16)
    at ReadableByteStreamController.pullAlgorithm (ext:deno_web/06_streams.js:3563:14)
    at readableByteStreamControllerCallPullIfNeeded (ext:deno_web/06_streams.js:1242:49)
    at ReadableByteStreamController.[[[PullSteps]]] (ext:deno_web/06_streams.js:5983:5)
    at readableStreamDefaultReaderRead (ext:deno_web/06_streams.js:2513:36)
    at ReadableStreamDefaultReader.read (ext:deno_web/06_streams.js:5480:5)
    at file:///home/wyf/deno/main.ts:10:38
    at eventLoopTick (ext:core/01_core.js:168:7)

from deno.

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