[bug] plugin-http is unable to perform streaming HTTP requests

[Blushyes]

Describe the bug

Here is demo:

const response = await fetch(`http://xxx:port/xxx`, {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Accept': 'text/event-stream',
  },
  body: {/* Some body */},
});

if (!response.body) {
  throw new Error('No response body');
}

const reader = response.body.getReader();
const decoder = new TextDecoder();

while (true) {
  const {done, value} = await reader.read();

  if (done) break;

  const chunk = decoder.decode(value);
  const lines = chunk.split('\n');

  for (const line of lines) {
    if (line.startsWith('data: ')) {
      const data = line.slice(6).trim();

      if (data === '[DONE]') {
        console.log('Stream completed');
        break;
      } else if (data) {
        console.log('Received chunk:', data);
      }
    }
  }
}

With the same code, when I use the browser's native fetch, it runs normally and outputs results in a streaming manner. However, when using Tauri's plugin-http, it blocks until the server outputs all content and then outputs everything at once, which means it blocks at const = await fetch()

Reproduction

No response

Expected behavior

No response

Full tauri info output

[✔] Environment
    - OS: Mac OS 15.1.1 arm64 (X64)
    ✔ Xcode Command Line Tools: installed
    ✔ rustc: 1.82.0 (f6e511eec 2024-10-15)
    ✔ cargo: 1.82.0 (8f40fc59f 2024-08-21)
    ✔ rustup: 1.27.1 (54dd3d00f 2024-04-24)
    ✔ Rust toolchain: stable-aarch64-apple-darwin (default)
    - node: 22.8.0
    - pnpm: 9.14.2
    - yarn: 1.22.21
    - npm: 10.9.0

[-] Packages
    - tauri 🦀: 2.0.3
    - tauri-build 🦀: 2.0.1
    - wry 🦀: 0.46.0
    - tao 🦀: 0.30.3
    - @tauri-apps/api : 2.0.2 (outdated, latest: 2.1.1)
    - @tauri-apps/cli : 2.0.0-rc.13 (outdated, latest: 2.1.0)

[-] Plugins
    - tauri-plugin-dialog 🦀: 2.0.1
    - @tauri-apps/plugin-dialog : 2.0.1
    - tauri-plugin-fs 🦀: 2.0.1
    - @tauri-apps/plugin-fs : 2.0.2
    - tauri-plugin-http 🦀: 2.0.1
    - @tauri-apps/plugin-http : 2.0.1
    - tauri-plugin-sql 🦀: 2.0.1
    - @tauri-apps/plugin-sql : 2.0.1
    - tauri-plugin-single-instance 🦀: 2.0.1
    - @tauri-apps/plugin-single-instance : not installed!
    - tauri-plugin-log 🦀: 2.0.1
    - @tauri-apps/plugin-log : 2.0.0
    - tauri-plugin-os 🦀: 2.0.1
    - @tauri-apps/plugin-os : 2.0.0
    - tauri-plugin-updater 🦀: 2.0.2
    - @tauri-apps/plugin-updater : 2.0.0
    - tauri-plugin-notification 🦀: 2.0.1
    - @tauri-apps/plugin-notification : 2.0.0
    - tauri-plugin-autostart 🦀: 2.0.1
    - @tauri-apps/plugin-autostart : 2.0.0
    - tauri-plugin-process 🦀: 2.0.1
    - @tauri-apps/plugin-process : 2.0.0
    - tauri-plugin-shell 🦀: 2.0.1
    - @tauri-apps/plugin-shell : 2.0.1
    - tauri-plugin-global-shortcut 🦀: 2.0.1
    - @tauri-apps/plugin-global-shortcut : 2.0.0

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../dist
    - devUrl: http://localhost:10002/
    - framework: Vue.js
    - bundler: Vite

Stack trace

No response

Additional context

No response

[goplayegg]

I am facing this two. Are there any good alternatives to solve this problem? in my situation, I want make a AI chat HTTP request in tauri app,which may run on Android and Windows platform

[amrbashir]

Added in #2479