How to call interface in uniapp

uni-app calling interface steps: define the request method, including URL, method and data; set the request header (optional); send the request; response processing, including success and failure callbacks.

How to use uni-app to call the interface

Steps:

1. Define the request method

<code class="javascript">const request = uni.request({
  url: 'http://example.com/api/v1/users',
  method: 'GET',
  data: {
    name: 'John Doe'
  },
  success: (res) => {
    console.log(res.data)
  },
  fail: (err) => {
    console.log(err)
  }
})</code>

Parameter description:

• url: Requested interface address
• method: Request method (such as GET, POST, PUT, DELETE)
• data: Request parameters (optional)
• success: The callback function when the request is successful
• fail: The callback function when the request fails

2. Settings Request header (optional)
You can use the setRequestHeader() method to set the request header:

<code class="javascript">request.setRequestHeader('Content-Type', 'application/json')</code>

3. Send a request
Callsend() Method to send a request:

<code class="javascript">request.send()</code>

4. Response processing
Process the response of successful request in the success callback function, in fail Error in handling request failure in callback function.

Example:

<code class="javascript">uni.request({
  url: 'http://example.com/api/v1/users',
  method: 'GET',
  success: (res) => {
    const users = res.data.users
    console.log(users)
  },
  fail: (err) => {
    console.log(err)
  }
})</code>

Note:

• uni.request() Yes Asynchronous requests will not block the execution of subsequent code.
• Make sure the interface address and request method are correct.
• For interfaces that require authentication, the necessary token or other credentials need to be carried in the request header.
• When processing a request fails, you can take appropriate measures based on the specific error code, such as retrying the request or prompting the user.

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