# Playwright

Playwright 对代理有一等支持——直接把凭证传给 `launch()` 或 `new_context()`，无需扩展技巧。

## Python

```python
from playwright.sync_api import sync_playwright

with sync_playwright() as p:
    browser = p.chromium.launch(proxy={
        "server":   "http://gate.helodata.io:7777",
        "username": "helo_s1a2b3c4d5e-type-res-region-us",
        "password": "PASSWORD",
    })
    page = browser.new_page()
    page.goto("https://ipv4.icanhazip.com")
    print(page.content())
    browser.close()
```

SOCKS5 用 `"server": "socks5://gate.helodata.io:7777"`，DNS 由代理解析。

## Node.js

```js
import { chromium } from "playwright";

const browser = await chromium.launch({
  proxy: {
    server:   "http://gate.helodata.io:7777",
    username: "helo_s1a2b3c4d5e-type-res-region-us",
    password: "PASSWORD",
  },
});
const page = await browser.newPage();
await page.goto("https://ipv4.icanhazip.com");
console.log(await page.content());
await browser.close();
```

## 按 Context 配代理

不同浏览器 Context 用不同代理——适合并发会话：

```python
ctx_us = browser.new_context(proxy={"server": "http://gate.helodata.io:7777",
                                    "username": "helo_s1a2b3c4d5e-type-res-region-us",
                                    "password": "PASSWORD"})
ctx_de = browser.new_context(proxy={"server": "http://gate.helodata.io:7777",
                                    "username": "helo_s1a2b3c4d5e-type-res-region-de",
                                    "password": "PASSWORD"})
```

浏览器进程共享，Context 之间彼此隔离，像独立的 profile。

## ISP

```python
browser = p.chromium.launch(proxy={
    "server":   "http://198.51.100.42:8000",
    "username": "helo_s1a2b3c4d5e",
    "password": "PASSWORD",
})
```

## Playwright 中轮换会话

每个 Context 生成新的子账号字符串，带独立 `session-XXX`：

```python
import random, string
def session_user(country="us"):
    sid = "".join(random.choices(string.ascii_lowercase + string.digits, k=8))
    return f"helo_s1a2b3c4d5e-type-res-region-{country}-session-{sid}-sesstime-10"

ctx = browser.new_context(proxy={
    "server": "http://gate.helodata.io:7777",
    "username": session_user(),
    "password": "PASSWORD",
})
```

## 验证

```python
ip = page.evaluate("fetch('https://ipv4.icanhazip.com').then(r => r.text())")
print(ip)
```

## 常见陷阱

* **代理认证无需 headless 特殊参数** — Playwright 在 headful/headless 下都原生支持。
* **WebRTC 泄露** — Playwright 默认不通过 WebRTC 暴露本机 IP，若目标会嗅探请用 `browserleaks.com/webrtc` 复核。
* **绕过清单** — 用 `proxy.bypass = "localhost,127.0.0.1"` 避免把内网目标也代理出去。


---

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