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Scirra / Construct-bugs

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Offline application Android bug #7987

Closed WilsonPercival closed 3 weeks ago

WilsonPercival commented 3 weeks ago

Problem description

The game installed on the device does not open if there is no Internet connection.

The same thing happens on a computer, so it's not an Android bug.

Attach a .c3p

offline_application_android_bug_r389b.zip

export: offline_application_android_bug_r389b export.zip

link: https://offline-application-android.netlify.app/

Steps to reproduce

  1. Open the project and export it to Web (HTML5) or use ready-made export. Please note that the Offline support checkbox must be enabled.
  2. Upload the export to your hosting or follow the ready-made link.
  3. Open the game on your Android tablet and install it on your device.
  4. Open the application and make sure the game works well.
  5. Close the game. Make sure you close the background process.
  6. Disable your Internet connection.
  7. Open the application.

Observed result

https://github.com/WilsonPercival/WilsonPercival/assets/91274932/7b1acb19-325e-4a6c-9077-a25f423246c8

observed observed desktop

Expected result

I can play the game even if I have no internet connection. Is this the essence of offline support?

More details

Affected browsers/platforms: Chrome and Chrome (Android)

First affected release: r42b as it is the oldest version I can test.

System details

View details Platform information Product: Construct 3 r389 (beta) Browser: Chrome 124.0.6367.91 Browser engine: Chromium Context: browser Operating system: Windows 11 Device type: desktop Device pixel ratio: 1.5 Logical CPU cores: 16 Approx. device memory: 8 GB User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36 Language setting: en-US Local storage Storage quota (approx): 283 gb Storage usage (approx): 550 mb (0.2%) Persistant storage: Yes Browser support notes This list contains missing features that are not required, but could improve performance or user experience if supported. Nothing is missing. Everything is OK! WebGL information Version string: WebGL 2.0 (OpenGL ES 3.0 Chromium) Numeric version: 2 Supports NPOT textures: yes Supports GPU profiling: no Supports highp precision: yes Vendor: Google Inc. (AMD) Renderer: ANGLE (AMD, AMD Radeon(TM) Graphics (0x00001638) Direct3D11 vs_5_0 ps_5_0, D3D11) Major performance caveat: no Maximum texture size: 16384 Point size range: 1 to 1024 Extensions: EXT_clip_control EXT_color_buffer_float EXT_color_buffer_half_float EXT_conservative_depth EXT_depth_clamp EXT_disjoint_timer_query_webgl2 EXT_float_blend EXT_polygon_offset_clamp EXT_texture_compression_bptc EXT_texture_compression_rgtc EXT_texture_filter_anisotropic EXT_texture_mirror_clamp_to_edge EXT_texture_norm16 KHR_parallel_shader_compile NV_shader_noperspective_interpolation OES_draw_buffers_indexed OES_texture_float_linear OVR_multiview2 WEBGL_blend_func_extended WEBGL_clip_cull_distance WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context WEBGL_multi_draw WEBGL_polygon_mode WEBGL_provoking_vertex WEBGL_stencil_texturing Audio information System sample rate: 48000 Hz Output channels: 2 Output interpretation: speakers Supported decode formats: WebM Opus (audio/webm;codecs=opus) WebM Vorbis (audio/webm;codecs=vorbis) MPEG-4 Opus (audio/mp4;codecs=opus) MPEG-4 AAC (audio/mp4;codecs=mp4a.40.2) MP3 (audio/mpeg) FLAC (audio/flac) PCM WAV (audio/wav;codecs=1) Supported encode formats: WebM Opus (audio/webm;codecs=opus) Video information Supported decode formats: WebM AV1 (video/webm;codecs=av01.0.00M.08) WebM VP9 (video/webm;codecs=vp9) WebM VP8 (video/webm;codecs=vp8) MPEG-4 AV1 (video/mp4;codecs=av01.0.00M.08) MPEG-4 H.265 (video/mp4;codecs=hev1.1.2.L93.B0) MPEG-4 H.264 (video/mp4;codecs=avc1.420034) Supported encode formats: WebM AV1 (video/webm;codecs=av01.0.00M.08) WebM VP9 (video/webm;codecs=vp9) WebM VP8 (video/webm;codecs=vp8) WebM H.264 (video/webm;codecs=avc1.420034)
AshleyScirra commented 3 weeks ago

This reproduces for me with the netlify URL, but does not reproduce for me when uploaded here: https://downloads.scirra.com/labs/offlinetest/

I think this is because netlify sets the header Cache-Control: public,max-age=0,must-revalidate on the main document, which essentially means "this can be cached for 0 seconds and must be revalidated with the server after that time". So it looks to me like the server configuration essentially disables offline support. The downloads.scirra.com server sends a different Cache-Control header and that allows it to work offline normally.