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  1. Guacamole
  2. GUACAMOLE-827

BlobWrite FileReader Busy State When Writing Data To VM

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Details

    • Bug
    • Status: Open
    • Trivial
    • Resolution: Unresolved
    • 1.0.0
    • None
    • guacamole-common-js
    • Google Chrome

    Description

      When creating a custom HTML/JS Guacamole client to write files to a VM using the BlobWriter JS class, an error similar to the following is generated (error is from running the code in Google Chrome):

       
      zone.js:1495 Uncaught (in promise) DOMException: Failed to execute 'readAsArrayBuffer' on 'FileReader': The object is already busy reading Blobs.
      at _global.<computed>.<computed> [as readAsArrayBuffer] (https://redacted/polyfills.6e39da16eddfecb84434.js:3830:60)
      at readNextChunk (https://redacted/main.51a4f7c78afe09ae8d5e.js:168269:20)
      at push../src/app/components/core/desktop/js/BlobWriter.js.redacted.ArrayBufferWriter.sendMoreChunks [as onack] (https://redacted/main.51a4f7c78afe09ae8d5e.js:168295:17)
      at push../node_modules/guacamole-common-js/dist/guacamole-common.js.Guacamole.OutputStream.stream.onack (https://redacted/main.51a4f7c78afe09ae8d5e.js:168396:25)
      at ack (https://redacted/main.51a4f7c78afe09ae8d5e.js:114024:28)
      at push../node_modules/guacamole-common-js/dist/guacamole-common.js.Guacamole.HTTPTunnel.tunnel.oninstruction (https://redacted/main.51a4f7c78afe09ae8d5e.js:114685:13)
      at XMLHttpRequest.parseResponse [as __zone_symbol__ON_PROPERTYreadystatechange] (https://redacted/main.51a4f7c78afe09ae8d5e.js:123910:40)
      at XMLHttpRequest.wrapFn (https://redacted/polyfills.6e39da16eddfecb84434.js:3667:39)
      at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (https://redacted/polyfills.6e39da16eddfecb84434.js:2758:31)
      at Object.onInvokeTask (https://redacted/main.51a4f7c78afe09ae8d5e.js:33312:33)
       
      While a file would ultimately get written to the remote VM, it is never a complete file given the error above, which seems to be indicative of the asynchronous nature of the file transfer activity and the contentious use of the BlobWriter FileReader object.

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            Unassigned Unassigned
            jcaple James Caple
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            Dates

              Created:
              Updated: