如何访问具有blob协议的PDF文件，java.net.MalformedURLException：未知协议：blob如何在selenium java中解决？

Answer 1

我找到了如何访问具有 blob 协议的 PDF 文件 java.net.MalformedURLException: unknown protocol: blob how to resolve in selenium java? 问题的解决方案。

1. 首先使用以下代码将 blob 链接上的 PDF 转换为 base64：

     private String getBytesBase64FromBlobURI(ChromeDriver driver, String uri) {
           String script = " "
                   + "var uri = arguments[0];"
                   + "var callback = arguments[1];"
                   + "var toBase64 = function(buffer){for(var r,n=new Uint8Array(buffer),t=n.length,a=new Uint8Array(4*Math.ceil(t/3)),i=new Uint8Array(64),o=0,c=0;64>c;++c)i[c]='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.charCodeAt(c);for(c=0;t-t%3>c;c+=3,o+=4)r=n[c]<<16|n[c+1]<<8|n[c+2],a[o]=i[r>>18],a[o+1]=i[r>>12&63],a[o+2]=i[r>>6&63],a[o+3]=i[63&r];return t%3===1?(r=n[t-1],a[o]=i[r>>2],a[o+1]=i[r<<4&63],a[o+2]=61,a[o+3]=61):t%3===2&&(r=(n[t-2]<<8)+n[t-1],a[o]=i[r>>10],a[o+1]=i[r>>4&63],a[o+2]=i[r<<2&63],a[o+3]=61),new TextDecoder('ascii').decode(a)};"
                   + "var xhr = new XMLHttpRequest();"
                   + "xhr.responseType = 'arraybuffer';"
                   + "xhr.onload = function(){ callback(toBase64(xhr.response)) };"
                   + "xhr.onerror = function(){ callback(xhr.status) };"
                   + "xhr.open('GET','"+ uri +"');"
                   + "xhr.send();";
           String result = (String) driver.executeAsyncScript(script, uri);
           return result;
       }
   

   2. 第二步现在将base64转换为pdf文件

   public void savePDF(String path, String x){
   File file = new File(path);//"D:\\dealer-portal-v2-automation\\test.pdf");
   
           //Converting base64 to PDF
           try (FileOutputStream fos = new FileOutputStream(file); ) {
               // To be short I use a corrupted PDF string, so make sure to use a valid one if you want to preview the PDF file
               byte[] decoder = Base64.getDecoder().decode(x);
               fos.write(decoder);
               System.out.println("PDF File Saved");
           } catch (Exception e) {
               e.printStackTrace();
           }
   }
   

   3. 现在是主类

   public void main(Strings[] args) {
   //here pass your driver and the url 
           String x = getBytesBase64FromBlobURI((ChromeDriver) driver,url);
   //here convert your base64 to file and sendt base64 string and the path where you want to //store your PDF
           savePDF(path, x);
   }