[WPE][GTK] Cannot download main resource for media files

• Component: WebKitGTK
• Status: REOPENED ---

[Michael Catanzaro]

In Epiphany, visit either of these resources, then right click and "Save Page As":

Audio: https://upload.wikimedia.org/wikipedia/commons/9/90/Papalotla-sound.ogg

Video: https://upload.wikimedia.org/wikipedia/commons/3/35/Nerven_(1919).webm

Don't use "Save Video As" since that works fine. If you instead use "Save Page As" the browser will crash due to bug #186276. But with the patch from that bug to fix the crash, it still fails to download the media. I've been debugging a little bit:

 * In WebPage::getMainResourceDataOfFrame, frame->coreFrame()->loader().documentLoader() returns a valid DocumentLoader, but then loader->mainResourceData() returns nullptr. Bad. Turns out DoucmentLoader::m_mainResourceData is nullptr.
 * Why? Not sure, I haven't dived in deep enough. But it seems that webkitWebViewResourceLoadStarted (in WebKitWebView.cpp) gets called *three* times, instead of once, as I would expect. WebKitWebView assumes the first resource load is the main resource, which seems like it should be a safe assumption, but I'm going to guess that the real main resource is the third one (not sure). Looks like something weird is going on inside WebCore. Requires further investigation.

[Michael Catanzaro]

BTW what Epiphany is doing here is (1) webkit_web_view_get_main_resource() then (2) webkit_web_resource_get_data().

[Philippe Normand]

I can't reproduce this with Ephy TP 3.33.4-29-gf6bb1bce5 and I doubt it's related with GStreamer anyway.

[Michael Catanzaro]

This one is fixed!

[Michael Catanzaro]

Reopening. I closed this in error; it's not fixed after all. Since r243608, the files are now "successfully" downloaded instead of crashing the UI process, but they are one-byte files containing only a NULL byte.