[jira] [Created] (GUACAMOLE-827) BlobWrite FileReader Busy State When Writing Data To VM

["James Caple (JIRA)" <ji...@apache.org>]

James Caple created GUACAMOLE-827:
-------------------------------------

             Summary: BlobWrite FileReader Busy State When Writing Data To VM
                 Key: GUACAMOLE-827
                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-827
             Project: Guacamole
          Issue Type: Bug
          Components: guacamole-client
    Affects Versions: 1.0.0
         Environment: Google Chrome
            Reporter: James Caple
             Fix For: 1.1.0, 1.2.0


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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