How to use h5 network request in uniapp

In recent years, with the continuous development of the mobile Internet, more and more Web applications have been gradually transplanted into native applications. As mobile development technology continues to update, developers are constantly pursuing more efficient and excellent development methods. Among them, Uniapp, as a multi-terminal unified development framework, has received more and more attention and love. In uniapp, the h5 network request function can help developers interact with data more efficiently and conveniently.

1. Overview of Uniapp

Uniapp can be said to be a multi-terminal development framework that is developed once and runs everywhere. It supports the simultaneous development of H5, small programs and APPs. At the same time, uniapp also makes full use of the excellent features of Vue.js, allowing developers to conduct multi-terminal development through a unified development method. Therefore, Uniapp is considered a leader in cross-end development frameworks.

2. H5 network request function

In uniapp, you can use the uni.request() function to make network requests. Its basic syntax is as follows:

uni.request({
    url: '',
    data: {},
    header: {},
    method: '',
    dataType: '',
    responseType: '',
    success: res => {},
    fail: () => {},
    complete: () => {}
  })

Among them, each parameter The meaning is as follows:

• url: request interface address
• data: data to be sent
• header: request header information
• method: request Method (GET/POST, etc.)
• dataType: expected return data format
• responseType: expected return data type
• success: callback function for successful request
• fail: callback function for request failure
• complete: callback function at the end of the request

When using uni.request() to make network requests, the most commonly used ones are success and fail. These two callback functions. They allow developers to perform some related processing when the request succeeds or fails. For example, you can render the page based on the returned data, or provide an error message when the request fails. At the same time, by setting header parameters, data encryption and other related operations can also be performed.

3. Notes

In the process of using uniapp to make H5 network requests, there are some issues that need to be paid attention to. The details are as follows:

1. Absolute path and relative path issues

When using uni.request() to make a network request, you need to pay attention to the setting of the request interface address. Generally speaking, interface addresses can be divided into two types: absolute paths and relative paths. For H5 applications, absolute paths generally start with http or https, while relative paths start with/or other relative paths. When setting the interface address, you need to set it according to the actual situation.

2. Cross-domain request problem

When using uni.request() to make a network request, if the requested interface address and the application address are not under the same domain name, it will A cross-domain request problem occurred. In order to avoid this situation, you can set the response header information on the server side.

3. Security issues

When making H5 network requests, you need to pay attention to the security issues of the interface address. Especially when requesting some personal privacy data, security verification is required to avoid leaking user information.

4. Summary

In general, uniapp, as a cross-terminal development framework, has the advantages of efficiency, convenience, multi-terminal, and low cost. In H5 development, making network requests through the uni.request() function allows developers to interact with data more conveniently and quickly. Although in actual applications, you will still face some security, cross-domain and other issues, but as long as you pay attention to some details and precautions, these problems can be solved. I believe that in the future, the combination of Uniapp and H5 technology will become more and more perfect, bringing more convenience to our mobile terminal development.

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