[jira] [Created] (CB-10164) Allow seeking beyond current data end of a file

["Shuqian Ying (JIRA)" <ji...@apache.org>]

Shuqian Ying created CB-10164:
---------------------------------

             Summary: Allow seeking beyond current data end of a file
                 Key: CB-10164
                 URL: https://issues.apache.org/jira/browse/CB-10164
             Project: Apache Cordova
          Issue Type: Improvement
          Components: Plugin File
            Reporter: Shuqian Ying


The plugin does not allow seeking beyond the current length of a file using the following code the enforce it:

if (offset > this.length) {
    this.position = this.length;
}

in the FileWriter.js file. 

We found this to cause a lot of issues in random access concurrent write application scenarios since it modifies the semantics of seek silently that may cause file corruption without informing the client what went wrong. Our application behaves correctly after removing such a restriction. 

We belief that such a restriction should be removed since file systems in most underlying OSs allow seeking beyond the current data end of a file (like Windows and *nix family of OSs), it's a POSIX.1 standard, adding a restriction on top of them does not make sense. If such a restriction is required, it maybe is better to throw an exception instead of "decide what to do for the client".



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