Uploading PDF files via webpage

[juhoinkinen]

Currently the text to be indexed can be entered in the form of the webpage or directly sent to the API's suggest method. However, in case of many users the original document is a PDF file, from which the user needs to extract the text as a first step (for webpage user this means manually copying to clipboard). This issue is for adding a feature to upload a PDF file via the webpage.

Needs:

• file upload functionality to the webpage
• extraction of text from the uploaded PDF file
• passing the extracted text to Annif API
• possibly error handling in upload and/or text extraction

Some examples:

• simple upload button with jQuery
• upload button and drag-and-drop box with Bootstrap
• more examples with Bootstrap

Some open questions:

• Layout possibilities:
  • "upload file" button to top-right corner of text-box (above clear button) and drag-and-drop functionality to textarea
  • dedicated tabs: one for raw-text input as now: "Enter text to be indexed"; another for the PDF upload: "Upload PDF to be indexed"
• After upload and text extraction, should the extracted text be shown on the webpage (in textarea)?

[juhoinkinen]

Also the features that might be implemented in the future should be kept in mind, like a feature to index a webpage by giving its url, or a feature to take a photo/upload an image, run OCR on the image, and index the OCR'ed text.

[juhoinkinen]

This is done.