[speech-commands] Add support for custom model and metadata URLs

[caisq]

With unit tests.

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This change is 

[caisq]

cc @pyu10055

[bileschi]

Reviewed 6 of 9 files at r1, 1 of 3 files at r2.
Reviewable status: 0 of 1 approvals obtained (waiting on @caisq and @bileschi)

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speech-commands/src/browser_fft_recognizer.ts, line 71 at r2 (raw file):

   * @param modelURL An optional, custom model URL pointing to a model.json
   *   file. Supported schemes: http://, https://, and node.js-only: file://.
   *   Mutually exclusive with `vocabulary`. If provided, `customMetadatURL`

i think you meant metadataURL here

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speech-commands/src/browser_fft_recognizer.ts, line 74 at r2 (raw file):

   *   most also be provided.
   * @param metadataURL A custom metadata URL pointing to a metadata.json
   *   file. Must be provided together with `customModelURL`.

typo old argument name

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speech-commands/src/browser_fft_utils.ts, line 29 at r2 (raw file):

··

lint error maybe? spaces at end of line?

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speech-commands/src/browser_fft_utils.ts, line 34 at r2 (raw file):

    return content;
  } else {
    throw new Error(`Unsupported URL scheme in metadata URL: ${url}`);

Perhaps add here that URL must begin with one of 'http://' 'https://' or 'file://' (nodeJS only)

[caisq]

Thanks for the review!

Reviewable status: complete! 1 of 1 approvals obtained (waiting on @bileschi)

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speech-commands/src/browser_fft_recognizer.ts, line 71 at r2 (raw file):

Previously, bileschi (Stanley Bileschi) wrote…

i think you meant metadataURL here

Done.

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speech-commands/src/browser_fft_recognizer.ts, line 74 at r2 (raw file):

Previously, bileschi (Stanley Bileschi) wrote…

typo old argument name

Done.

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speech-commands/src/browser_fft_utils.ts, line 29 at r2 (raw file):

Previously, bileschi (Stanley Bileschi) wrote…

··

lint error maybe? spaces at end of line?

Done.

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speech-commands/src/browser_fft_utils.ts, line 34 at r2 (raw file):

Previously, bileschi (Stanley Bileschi) wrote…

Perhaps add here that URL must begin with one of 'http://' 'https://' or 'file://' (nodeJS only)

Done.