URL withPostData downloadAsFile() on iOS

daniel · February 26, 2026, 3:55pm

Hi there,
I am trying to fetch data with a post data request from the iPad simulator. This works perfectly on macOS (and windows), but from iOS the data on the server is empty.
The server is using https with letsencrypt.

It sounds it could be an entitlement or permissions issue, but could be anything else.
What do I have to do, if it is a user error, or which entitlement could work here?

Thanks!

daniel · February 26, 2026, 10:14pm

So I was debugging into juce_network_mac.mm. The request is assembled in the constructor of
BackgroundDownloadTask
But there is no mention of url.postData.

I might be wrong, but is it possible that it is not implemented?

github.com/juce-framework/JUCE

modules/juce_core/native/juce_Network_mac.mm

501c07674


      
          BackgroundDownloadTask (const URL& urlToUse,

                                  const File& targetLocationToUse,

                                  const URL::DownloadTaskOptions& options)

               : listener (options.listener),

                 uniqueIdentifier (String (urlToUse.toString (true).hashCode64()) + String (Random().nextInt64()))

          {

              targetLocation = targetLocationToUse;

              downloaded = -1;

          

              static DelegateClass cls;

              delegate = [cls.createInstance() init];

              DelegateClass::setState (delegate, this);

          

              activeSessions.set (uniqueIdentifier, this);

              auto nsUrl = [NSURL URLWithString: juceStringToNS (urlToUse.toString (true))];

          

              jassert (nsUrl != nullptr);

          

              JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wnullable-to-nonnull-conversion")

              NSMutableURLRequest* request = [[NSMutableURLRequest alloc] initWithURL: nsUrl];

This file has been truncated. show original

The link in the comment to a github repo is no longer valid or private.
That sounds related to postData.

What can be done so I can send postData from an iOS device?

Thanks

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URL withPostData downloadAsFile() on iOS

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URL withPostData downloadAsFile() on iOS

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