收到获取请求后如何显示页面？

时间：2019-07-23 11:40:15

标签： javascript node.js express

我试图在收到获取请求后显示页面。例如，某个用户向我的服务器（'/ home'）发送一个获取请求，而我想在此之后显示主页。

我尝试使用res.render，但是它不会更改页面。它只会将网址发回。

fetch('lom').then((res)=>{

        console.log(res);

}); //GET Request

app.get('/lom',(req,res)=>{

    res.render('lom');

}); // Respond

我希望在请求后可以看到/ home页面，但是当前页面没有变化。 我不想使用window.location.href ='/ lom'。我想在服务器端更改页面。

3 个答案:

答案 0 :(得分：0)

您正在使用fetch。

使用fetch的整个点是浏览器不导航到新页面，而是使用JavaScript处理响应。< / p>

使用常规链接。提交表格。使用window.location.href = '/lom'（我知道您说过您不想想要，但不想想要去做正确的事，这是不这样做的可怕原因）。但是请执行一些导致浏览器导航的操作。 fetch是该作业的错误工具。

  

我想在服务器端更改页面。

无法直接从服务器端在浏览器中触发导航。客户端上需要设计一些东西来进行导航（这可能是由基于服务器响应中数据的客户端代码触发的，但仍然需要是客户端）。

答案 1 :(得分：0)

我不确定我是否完全理解您的问题，无论如何，请看下面的代码，一个 res.send 命令，发送要显示的内容（https://expressjs.com/en/guide/routing.html） 

app.get('/', function (req, res) {
  res.send('root')
})

我建议您对模板引擎感兴趣 https://expressjs.com/en/advanced/developing-template-engines.html

答案 2 :(得分：0)

Fetch只会对“ lom”（ajax调用）执行XMLHttpRequest请求，这不应该重定向您的页面，而只在res参数中接收响应。

2019-07-23 14:05:15.209 12108-12108/com.icapps.arcapps E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.icapps.arcapps, PID: 12108
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.icapps.arcapps/com.icapps.arcapps.activity.products.PlantDetailActivity}: android.view.InflateException: Binary XML file line #23: Binary XML file line #23: Error inflating class fragment
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3037)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3172)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1906)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6863)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: android.view.InflateException: Binary XML file line #23: Binary XML file line #23: Error inflating class fragment
     Caused by: android.view.InflateException: Binary XML file line #23: Error inflating class fragment
     Caused by: androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment com.google.ar.sceneform.ux.ArFragment: calling Fragment constructor caused an exception
        at androidx.fragment.app.Fragment.instantiate(Fragment.java:532)
        at androidx.fragment.app.FragmentContainer.instantiate(FragmentContainer.java:57)
        at androidx.fragment.app.FragmentManagerImpl$6.instantiate(FragmentManagerImpl.java:2850)
        at androidx.fragment.app.FragmentManagerImpl.onCreateView(FragmentManagerImpl.java:3195)
        at androidx.fragment.app.FragmentController.onCreateView(FragmentController.java:134)
        at androidx.fragment.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:357)
        at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:336)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:545)
        at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:161)
        at androidx.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:303)
        at androidx.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:284)
        at com.icapps.arcapps.activity.products.PlantDetailActivity.onCreate(PlantDetailActivity.kt:39)
        at android.app.Activity.performCreate(Activity.java:7149)
        at android.app.Activity.performCreate(Activity.java:7140)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1288)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3017)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3172)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1906)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6863)
2019-07-23 14:05:15.210 12108-12108/com.icapps.arcapps E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Constructor.newInstance0(Native Method)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
        at androidx.fragment.app.Fragment.instantiate(Fragment.java:514)
            ... 33 more
     Caused by: java.lang.BootstrapMethodError: Exception from call site #38 bootstrap method
        at com.google.ar.sceneform.ux.BaseArFragment.<init>(BaseArFragment.java:97)
        at com.google.ar.sceneform.ux.ArFragment.<init>(ArFragment.java:35)
            ... 36 more
     Caused by: java.lang.ClassCastException: Bootstrap method returned null
            ... 38 more
2019-07-23 14:05:15.211 12108-12108/com.icapps.arcapps E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.icapps.arcapps, PID: 12108
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.icapps.arcapps/com.icapps.arcapps.activity.products.PlantDetailActivity}: android.view.InflateException: Binary XML file line #23: Binary XML file line #23: Error inflating class fragment
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3037)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3172)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1906)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6863)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: android.view.InflateException: Binary XML file line #23: Binary XML file line #23: Error inflating class fragment
     Caused by: android.view.InflateException: Binary XML file line #23: Error inflating class fragment
     Caused by: androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment com.google.ar.sceneform.ux.ArFragment: calling Fragment constructor caused an exception
        at androidx.fragment.app.Fragment.instantiate(Fragment.java:532)
        at androidx.fragment.app.FragmentContainer.instantiate(FragmentContainer.java:57)
        at androidx.fragment.app.FragmentManagerImpl$6.instantiate(FragmentManagerImpl.java:2850)
        at androidx.fragment.app.FragmentManagerImpl.onCreateView(FragmentManagerImpl.java:3195)
        at androidx.fragment.app.FragmentController.onCreateView(FragmentController.java:134)
        at androidx.fragment.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:357)
        at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:336)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:545)
        at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:161)
        at androidx.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:303)
        at androidx.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:284)
        at com.icapps.arcapps.activity.products.PlantDetailActivity.onCreate(PlantDetailActivity.kt:39)
        at android.app.Activity.performCreate(Activity.java:7149)
        at android.app.Activity.performCreate(Activity.java:7140)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1288)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3017)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3172)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1906)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6863)
2019-07-23 14:05:15.212 12108-12108/com.icapps.arcapps E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Constructor.newInstance0(Native Method)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
        at androidx.fragment.app.Fragment.instantiate(Fragment.java:514)
            ... 33 more
     Caused by: java.lang.BootstrapMethodError: Exception from call site #38 bootstrap method
        at com.google.ar.sceneform.ux.BaseArFragment.<init>(BaseArFragment.java:97)
        at com.google.ar.sceneform.ux.ArFragment.<init>(ArFragment.java:35)
            ... 36 more
     Caused by: java.lang.ClassCastException: Bootstrap method returned null
            ... 38 more```

因此，通过执行console.log，您将在浏览器控制台选项卡中看到您的响应。无论如何，如果要进行重定向，请在客户端进行操作，例如：window.location ='/ home'。

相关问题
最新问题