[stable20] Fix opening PDF files with special characters in their name #298
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Before the move to the viewer the URL of the PDF file to load was got using "Files.getDownloadUrl()", which encodes each section of the path as a URI component. The full URL, in turn, was again encoded as a URI component to set the source of the iframe in which the PDF viewer is loaded. When the PDF viewer parsed the URL it decoded it once, so each section of the path was still encoded as a URI component. After the move to the viewer the URL of the PDF file to load was got from the "davPath" property set by the viewer, which uses the filename as is. The full URL was then encoded as a URI component, so when the PDF viewer parsed and decoded the URL the raw filename was used. In most cases it worked fine, but if the filename included some special character, like "?", the file failed to load. Now, instead of using the "davPath" property set by the viewer, each section of the dav path is encoded as a URI component. The encoding tries to not make any assumption on the format used by the viewer to avoid being coupled too much. Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
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backport of #291