harmony 鸿蒙Web Subsystem Changelog

2023-10-30
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Web Subsystem Changelog

Compared with earlier versions, OpenHarmony 4.0.7.3 has the following API changes in its web subsystem:

cl.web.1 New Input Parameter Type of the setResponseData API

Added the input parameter type Resource for the setResponseData API.

Change Impact

In the scenario where a HAP file is not decompressed, the file path in the HAP does not exist. Under this scenario, to access resources in the HAP file, you must use the input parameter data:Resource instead of data:number.

Key API/Component Changes

Involved APIs:

setResponseData

Before change:

  setResponseData(data: string|number)

After change:

  setResponseData(data: string|number|Resource)

Adaptation Guide

When a HAP file is decompressed, open the hold the FD of the target resource file, and then transfer the resource response data to the kernel through setResponseData(data:number).

// xxx.ets
import web_webview from '@ohos.web.webview'
import fileio from '@ohos.fileio';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController()
  responseweb: WebResourceResponse = new WebResourceResponse()
  heads: Header[] = new Array()

  build() {
    Column() {
      Web({ src: 'www.example.com', controller: this.controller })
        .onInterceptRequest((event) => {
          console.log('url:' + event.request.getRequestUrl())
          var head1:Header = {
            headerKey:"Connection",
            headerValue:"keep-alive"
          }
          var head2:Header = {
            headerKey:"Cache-Control",
            headerValue:"no-cache"
          }
          var length = this.heads.push(head1)
          length = this.heads.push(head2)
          this.responseweb.setResponseHeader(this.heads)
          this.responseweb.setResponseEncoding('utf-8')
          this.responseweb.setResponseMimeType('text/html')
          this.responseweb.setResponseCode(200)
          this.responseweb.setReasonMessage('OK')

          //// fd scheme --start
          // '/xxx/.../test.html' is the local path of the file.
          // @ts-ignore
          let fd = fileio.openSync('/xxx/.../test.html', 0o102, 0o666)
          this.responseweb.setResponseData(fd)
          //// fd scheme --end

          return this.responseweb
        })
    }
  }
}

When a HAP file is decompressed, the file path in the HAP does not exist. In this case, transfer the resource response data to the kernel through setResponseData(data:Resource).

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController()
  responseweb: WebResourceResponse = new WebResourceResponse()
  heads: Header[] = new Array()

  build() {
    Column() {
      Web({ src: 'www.example.com', controller: this.controller })
        .onInterceptRequest((event) => {
          console.log('url:' + event.request.getRequestUrl())
          var head1:Header = {
            headerKey:"Connection",
            headerValue:"keep-alive"
          }
          var head2:Header = {
            headerKey:"Cache-Control",
            headerValue:"no-cache"
          }
          var length = this.heads.push(head1)
          length = this.heads.push(head2)
          this.responseweb.setResponseHeader(this.heads)
          this.responseweb.setResponseEncoding('utf-8')
          this.responseweb.setResponseMimeType('text/html')
          this.responseweb.setResponseCode(200)
          this.responseweb.setReasonMessage('OK')
          
          //// Resource scheme --start
          // Specify the target file in the rawfile directory of the HAP file.
          this.responseweb.setResponseData($rawfile('test.html'))
          //// Resource scheme --end

          return this.responseweb
        })
    }
  }
}