React-Router External link

问题:

Since I'm using react-router to handle my routes in a react app, I'm curious if there is a way to redirect to an external resource.

Say someone hits:

example.com/privacy-policy

I would like it to redirect to:

example.zendesk.com/hc/en-us/articles/123456789-Privacy-Policies

I'm finding exactly zero help in avoiding writing it in plain JS at my index.html loading with something like:

if ( window.location.path === "privacy-policy" ){
  window.location = "example.zendesk.com/hc/en-us/articles/123456789-Privacy-Policies"
}

回答1:

Here's a one-liner for using React Router to redirect to an external link:

<Route path='/privacy-policy' component={() => { 
     window.location.href = 'https://example.com/1234'; 
     return null;
}}/>

It uses React pure component concept to reduce the component's code to a single function that, instead of rendering anything, redirects browser to an external URL.

Works both on React Router 3 and 4.

回答2:

I actually ended up building my own Component. <Redirect> It takes info from the react-router element so I can keep it in my routes. Such as:

<Route
  path="/privacy-policy"
  component={ Redirect }
  loc="https://meetflo.zendesk.com/hc/en-us/articles/230425728-Privacy-Policies"
  />

Here is my component incase-anyone is curious:

import React, { Component } from "react";

export class Redirect extends Component {
  constructor( props ){
    super();
    this.state = { ...props };
  }
  componentWillMount(){
    window.location = this.state.route.loc;
  }
  render(){
    return (<section>Redirecting...</section>);
  }
}

export default Redirect;

EDIT -- NOTE: This is with react-router: 3.0.5, it is not so simple in 4.x

回答3:

There is no need to use <Link /> component from react-router.

If you want to go to external link use an anchor tag.

<a target="_blank" href="https://meetflo.zendesk.com/hc/en-us/articles/230425728-Privacy-Policies">Policies</a>

回答4:

It doesn't need to request react router. This action can be done natively and it is provided by the browser.

just use window.location

class RedirectPage extends React.Component {
  componentDidMount(){
    window.location.replace('http://www.google.com')
  }
}

回答5:

Using some of the info here, I came up with the following component which you can use within your route declarations. It's compatible with React Router v4.

It's using typescript, but should be fairly straight-forward to convert to native javascript:

interface Props {
  exact?: boolean;
  link: string;
  path: string;
  sensitive?: boolean;
  strict?: boolean;
}

const ExternalRedirect: React.FC<Props> = (props: Props) => {
  const { link, ...routeProps } = props;

  return (
    <Route
      {...routeProps}
      render={() => {
        window.location.replace(props.link);
        return null;
      }}
    />
  );
};

And use with:

<ExternalRedirect
  exact={true}
  path={'/privacy-policy'}
  link={'https://example.zendesk.com/hc/en-us/articles/123456789-Privacy-Policies'}
/>

回答6:

I don't think React-Router provides this support. The documentation mentions

A < Redirect > sets up a redirect to another route in your application to maintain old URLs.

You could try using something like React-Redirect instead

回答7:

I had luck with this:

  <Route
    path="/example"
    component={() => {
    global.window && (global.window.location.href = 'https://example.com');
    return null;
    }}
/>

回答8:

FOR V3, although it may work for V4. Going off of Relic's answer, I needed to do a little more, like handle local development where 'http' is not present on the url. I'm also redirecting to another application on the same server.

Added to router file:

import RedirectOnServer from './components/RedirectOnServer';

       <Route path="/somelocalpath"
          component={RedirectOnServer}
          target="/someexternaltargetstring like cnn.com"
        />

And the Component:

import React, { Component } from "react";

export class RedirectOnServer extends Component {

  constructor(props) {
    super();
    //if the prefix is http or https, we add nothing
    let prefix = window.location.host.startsWith("http") ? "" : "http://";
    //using host here, as I'm redirecting to another location on the same host
    this.target = prefix + window.location.host + props.route.target;
  }
  componentDidMount() {
    window.location.replace(this.target);
  }
  render(){
    return (
      <div>
        <br />
        <span>Redirecting to {this.target}</span>
      </div>
    );
  }
}

export default RedirectOnServer;

回答9:

To expand on Alan's answer, you can create a <Route/> that redirects all <Link/>'s with "to" attributes containing 'http:' or 'https:' to the correct external resource.

Below is a working example of this which can be placed directly into your <Router>.

<Route path={['/http:', '/https:']} component={props => {
  window.location.replace(props.location.pathname.substr(1)) // substr(1) removes the preceding '/'
  return null
}}/>

回答10:

Using React with Typescript you get an error as the function must return a react element, not void. So I did it this way using the Route render method (and using React router v4):

redirectToHomePage = (): null => {
    window.location.reload();
    return null;
  };    
<Route exact path={'/'} render={this.redirectToHomePage} />

Where you could instead also use window.location.assign(), window.location.replace() etc

回答11:

If you are using server side rending, you can use StaticRouter. With your context as props and then adding <Redirect path="/somewhere" /> component in your app. The idea is everytime react-router matches a redirect component it will add something into the context you passed into the static router to let you know your path matches a redirect component. now that you know you hit a redirect you just need to check if thats the redirect you are looking for. then just redirect through the server. ctx.redirect('https://example/com').

回答12:

I was able to achieve a redirect in react-router-dom using the following

<Route exact path="/" component={() => <Redirect to={{ pathname: '/YourRoute' }} />} />

For my case, I was looking for a way to redirect users whenever they visit the root URL http://myapp.com to somewhere else within the app http://myapp.com/newplace. so the above helped.