在没有返回或错误的情况下响应本机获取暂停

Question

我目前正在构建一个应用程序，我试图在我的代码中做一个简单的获取。

const response = await fetch('http://localhost:8081/assets/src/...',{
    method: 'GET'
})

这个调用绝对没有输出。没有错误，没有返回。在记录Metro时，甚至没有传入请求。代码完全停止了。我用XMLHttpRequest试了一下，但结果几乎相同。唯一的区别是服务器获得请求。onerror或onload从未被调用过。

到目前为止我尝试过的是：

• android:usesCleartextTraffic="true"添加到地铁配置中的清单xml
• inlineRequires: true,中使用的
• 使用XMLHttpRequest
• <uses-permission android:name="android.permission.INTERNET" />设置

我真的希望有人能帮我！

我现在的package.json：

{
  "name": "myapp",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "android": "react-native run-android",
    "ios": "react-native run-ios",
    "start": "react-native start",
    "test": "jest",
    "lint": "eslint ."
  },
  "dependencies": {
    "@react-native-async-storage/async-storage": "^1.17.7",
    "@tensorflow/tfjs": "^3.18.0",
    "@tensorflow/tfjs-react-native": "^0.8.0",
    "async-storage": "^0.1.0",
    "aws-sdk": "^2.1170.0",
    "expo": "^45.0.0",
    "expo-asset": "^8.5.0",
    "expo-camera": "^12.2.0",
    "expo-constants": "~13.1.1",
    "expo-file-system": "^14.0.0",
    "expo-gl": "^11.3.0",
    "expo-gl-cpp": "^11.3.0",
    "expo-modules-core": "^0.9.2",
    "ffmpeg-kit-react-native": "^4.5.2",
    "geolib": "^3.3.3",
    "graphql": "^16.5.0",
    "graphql-ws": "^5.9.1",
    "react": "17.0.2",
    "react-native": "0.68.2",
    "react-native-base64": "^0.2.1",
    "react-native-battery": "^0.1.18",
    "react-native-device-info": "^10.0.0",
    "react-native-fs": "^2.20.0",
    "react-native-geolocation-service": "^5.3.0",
    "react-native-maps": "^1.0.0",
    "react-native-polyfill-globals": "^3.1.0",
    "react-native-vision-camera": "^2.13.5",
    "text-encoding": "^0.7.0"
  },
  "devDependencies": {
    "@babel/core": "^7.12.9",
    "@babel/eslint-parser": "^7.18.2",
    "@babel/plugin-proposal-class-properties": "^7.18.6",
    "@babel/runtime": "^7.12.5",
    "@react-native-community/eslint-config": "^2.0.0",
    "babel-jest": "^26.6.3",
    "eslint": "^7.32.0",
    "jest": "^26.6.3",
    "metro-react-native-babel-preset": "^0.67.0",
    "react-test-renderer": "17.0.2"
  },
  "jest": {
    "preset": "react-native"
  }
}

Answer 1

如果您来自邮递员和浏览器的响应看起来很好，那么这可能是因为您使用的是本地主机，而模拟器无法理解这个事实。

尝试使用您的IP附加(从您的计算机运行模拟器)。

所以不是：fetch('http://localhost:8081/assets/src..。

用途：fetch('http://localIPaddressFromYourPC:8081/assets/src