HarmonyOS API11中Web部件的onInterceptRequest方法设计有问题

Web部件的onInterceptRequest的callback参数是一个函数, 其返回值类型是WebResourceResponse, 文档中说, 该函数返回null时, 代表不做拦截, 但是在api11中, 返回值类型不包含null时, 不能返回null, 从而无法按需拦截

HarmonyOS

put_get

2024-08-23 12:46:03

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如果您需要进行拦截，那么您需要对WebResourceResponse重新定义，设置您的拦截策略。

如果不需要拦截，则直接返回null即可。

【不拦截】直接返回web中设置的网页

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() 
  @State webdata: string = "<!DOCTYPE html>\n" + 
    "<html>\n"+ 
    "<head>\n"+ 
    "<title>intercept test</title>\n"+ 
    "</head>\n"+ 
    "<body>\n"+ 
    "<h1>intercept test</h1>\n"+ 
    "</body>\n"+ 
    "</html>" 
  build() { 
    Column() { 
      Web({ src: 'www.example.com', controller: this.controller }) 
        .onInterceptRequest((event) => { 
          if (event) { 
            console.log('url:' + event.request.getRequestUrl()) 
          } 
          return null 
        }) 
    } 
  } 
}

【拦截】设置拦截策略，将按策略执行，下面样例替换成新的html

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() 
  @State webdata: string = "<!DOCTYPE html>\n" + 
    "<html>\n"+ 
    "<head>\n"+ 
    "<title>intercept test</title>\n"+ 
    "</head>\n"+ 
    "<body>\n"+ 
    "<h1>intercept test</h1>\n"+ 
    "</body>\n"+ 
    "</html>" 
  build() { 
    Column() { 
      Web({ src: 'www.example.com', controller: this.controller }) 
        .onInterceptRequest((event) => { 
          if (event) { 
            console.log('url:' + event.request.getRequestUrl()) 
          } 
          let head1:Header = { 
            headerKey:"Connection", 
            headerValue:"keep-alive" 
          } 
          let head2:Header = { 
            headerKey:"Cache-Control", 
            headerValue:"no-cache" 
          } 
          let length = this.heads.push(head1) 
          length = this.heads.push(head2) 
          this.responseweb.setResponseHeader(this.heads) 
          this.responseweb.setResponseData(this.webdata) 
          this.responseweb.setResponseEncoding('utf-8') 
          this.responseweb.setResponseMimeType('text/html') 
          this.responseweb.setResponseCode(200) 
          this.responseweb.setReasonMessage('OK') 
          return this.responseweb 
        }) 
    } 
  } 
}

2024-08-23 15:19:47

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