[Pharo-users] Downloading large files with a progress bar
Offray Vladimir Luna Cárdenas
offray.luna at mutabit.com
Thu May 12 19:00:59 EDT 2016
Thanks for your quick answer. I tried both approaches but I'm missing
something. See my last attempt at http://ws.stfx.eu/KBVBAP72IWOO with
the last one. I get a progress bar message, but not the advancements on
it. What I'm missing?
ps: The file I'm trying to download is covered by the Open Data Base
On 12/05/16 17:24, Sven Van Caekenberghe wrote:
> Hi Offray,
> The actual implementation of #saveContentsToFile: can be found in ZnHttpSaveContentsToFile>>#performOperation where you can see how ZnClient is invoked. Just copy that with signalProgress: true added and you should be good.
> Alternatively, you could wrap the first expression as follows:
> value: true
> during: [ myUrl asUrl saveContentsToFile: file ]
> ZnSignalProgress is a DynamicVariable that is used by ZnClient to figure out if progress should be signalled. It takes precedence over the option #signalProgress. See #withProgressDo: if you are interested.
>> On 13 May 2016, at 00:14, Offray Vladimir Luna Cárdenas <offray.luna at mutabit.com> wrote:
>> I'm using
>> myUrl asUrl saveContentsToFile: file
>> to download large files and is working fine. But I would like to add a progress bar to show the progress to the user. Previously I used
>> [: bar |
>> bar title: aString.
>> "A classical ZnClient download with signalProgress: true;"
>> on: HTTPProgress
>> do: [ :progress |
>> progress isEmpty ifFalse: [ bar current: progress percentage ].
>> progress resume ].
>> ] asJob run.
>> but I don't know how to signal progress with "saveContentsToFile".
>> Any hints?
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