Axios(在React-native中)不在本地主机中调用服务器 [英] Axios (in React-native) not calling server in localhost

问题描述

我正在构建一个非常简单的api和react-native应用程序.该服务器运行良好(已通过PostMan测试)，但该应用程序未调用该服务器.它会在axios必须发送发帖请求时阻止(见下文).

I'm building a really easy api and react-native application. The server works well (tested with PostMan) but the application doesn't call the server. It blocks when axios has to send the post request (see below).

我很绝望:-(忙得不可开交.请，如果您能帮助我...

I'm desperate :-( Loosing too mush time in it. Please, if you can help me...

这是我的代码登录"页面.它分派动作创建者(与redux一起使用)并提供电子邮件和密码:

Here is my code LogIn page. It dispatch the action creator (working with redux) giving email and password:

...
const LogIn = React.createClass({
  submitLogin() {
    // log in the server
    if (this.props.email !== '' && this.props.psw !== '') {
      if (this.props.valid === true) {
        this.props.dispatch(logIn(this.props.email, this.props.psw));
      } else {
        this.props.dispatch(errorTyping());
      }
    }
  },
...

电子邮件和密码被检索并发送给动作创建者:

email and password are weel retrieved and sent to the action creator:

import axios from 'axios';
import { SIGNIN_URL, SIGNUP_URL } from '../api';
// import { addAlert } from './alerts';
exports.logIn = (email, password) => {
  return function (dispatch) {    
    console.log(email);
    console.log(password);
    console.log(SIGNIN_URL);
    return axios.post(SIGNIN_URL, { email, password })
    .then(
      (response) => {
        console.log(response);
        const { token, userId } = response.data;
        dispatch(authUser(userId));
      }
    )
    .catch(
      (error) => {
        console.log('Could not log in');
      }
    );
  };
};
const authUser = (userId) => {
 return {
 type: 'AUTH_USER',
 userId
 };
};
...

axios之前的三个console.log()以正确的方式显示数据. SIGNIN_URL与邮递员中使用的完全相同. ...但是axios不会打电话.

The three console.log() before axios show the data in the correct way. SIGNIN_URL is exactly the same I use in postman. ...but axios doesn't call.

只要给所有卡片，这是我的商店:

Just to give all the cards, this is my store:

import thunk from 'redux-thunk';
import { createStore, compose, applyMiddleware } from 'redux';
import { AsyncStorage } from 'react-native';
import { persistStore, autoRehydrate } from 'redux-persist';
import reducer from '../reducer';
const defaultState = {};
exports.configureStore = (initialState = defaultState) => {
 const store = createStore(reducer, initialState, compose(
 applyMiddleware(thunk),
 autoRehydrate()
 ));
 persistStore(store, { storage: AsyncStorage });
 return store;
};

调试器中没有错误消息(但axios调用给出了错误消息(无法登录")

There's no error message in the debugger (but the one given by the axios call ('Could not log in')

我在Windows 10上，具有:

I'm on windows 10, with:

"axios": "^0.15.3",
"react": "15.4.2",
"react-native": "0.38.0",
"redux": "^3.6.0"

即使我准备了一个简单的GET调用，并且服务器应该返回一条简单的消息(经过邮递员和浏览器测试)，该调用也会失败:

The call fails even when I prepare a simple GET call and the server is supposed to give back a simple message (tested with postman and browser):

exports.test = () => {
  return function () {
    return axios.get('https://localhost:3000/v1/test')
    .then(
      (response) => {
        console.log(response);
      }
    )
    .catch(
      (error) => {
        console.log('error');
      }
    );
  };
};

最后，由于api编码为接受json，因此我还尝试了如下修改以添加标头的调用:

Last, I tryed also to modify the call adding a header as the following, because the api is coded to accept json:

const head = {
  headers: { 'Content-Type': 'application/json' }
};

exports.test = () => {
  return function () {
    return axios.get('https://api.github.com/users/massimopibiri', head)
    .then(
      (response) => {
        console.log(response);
      }
    )
    .catch(
      (error) => {
        console.log('error');
      }
    );
  };
};

但是即使这样也没有用.希望有人可以帮助我.其他类似问题没有.

but even this didn't work. hope somebody can help me. Other similar issues didn't.

推荐答案

该解决方案来自其他来源，但我将其发布在此处，以帮助其他人寻找相同的问题.基本上，我使用Android AVD(仿真器)来构建应用程序.但是仿真器实际上是另一台机器，这就是为什么它不能调用本地主机的原因.

The solution came from a different source, but I post it here to help others looking for the same issue. Basically I used Android AVD (emulator) to build the application. But the emulator is in fact another machine, and that's why it couldn't call the localhost.

要解决此问题，我必须通过以下方式发送请求:

To solve the probleme, I had to send the request in the following way:

https://10.0.2.2:3000/v1/test

代替:

https://localhost:3000/v1/test

这篇关于Axios(在React-native中)不在本地主机中调用服务器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！