Using mod-pagespeed in debug mod seems to break ImagePreserveURLs (ipu)

[Eric Longuemare]

Hello,

While doing some test with mod_pagespeed in debug mod (PageSpeedFilters=+debug), I found that ImagePreserveURLs (ipu) is on false thus ModPagespeedImagePreserveURLs is set to on in pagespeed apache conf file.

Then image file names in html files are extended with hash number.

In standard mode (production) files names are the original ones.

Is this the expected thing ?

Greatings,

Eric

 --
X-Mod-Pagespeed : 1.9.32.10-7443, I'm back to last stable version and "low ressources server".

debug logs in html file :


mod_pagespeed on
Filters:
cw	Collapse Whitespace
jc	Combine Javascript
gp	Convert Gif to Png
jp	Convert Jpeg to Progressive
jw	Convert Jpeg To Webp
pj	Convert Png to Jpeg
db	Debug
dj	Defer Javascript
hw	Flushes html
io	In-place optimize for browser
idp	Insert DNS Prefetch
js	Jpeg Subsampling
pr	Prioritize Critical Css
rj	Recompress Jpeg
rp	Recompress Png
rw	Recompress Webp
rc	Remove Comments
cf	Rewrite Css
jm	Rewrite External Javascript
jj	Rewrite Inline Javascript
cp	Strip Image Color Profiles
md	Strip Image Meta Data

Options:
CssInlineMaxBytes (ci) 10240
EnableCachePurge (euci) True
EnableRewriting (e) 1
FileCacheCleanIntervalMs (afcci) 3600000
FileCacheSizeKb (afc) 4096000
ImagePreserveURLs (ipu) False
ImplicitCacheTtlMs (ict) 15549367000
LoadFromFileCacheTtlMs (lfct) 15549367000
LRUCacheByteLimit (alcb) 16384
LRUCacheKbPerProcess (alcp) 1024
RewriteDeadlinePerFlushMs (rdm) 20
RewriteLevel (l) Optimize For Bandwidth
RunExperiment (fur) False
StatisticsLogging (asle) True
SupportNoScriptEnabled (snse) False

[Jeff Kaufman]

To clarify, are you saying:

1. You set "ImagePreserveUrls on" in your config
2. If you load your page normally your image urls aren't modified.
3. If you load your page with ?PageSpeedFilters=+debug then the image
urls are modified?

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[Eric Longuemare]

Hello,

>1. You set "ImagePreserveUrls on" in your config
>2. If you load your page normally your image urls aren't modified.
>3. If you load your page with ?PageSpeedFilters=+debug then the image
>urls are modified?

Yes, that's it.

 

[Joshua Marantz]

It would be good to see the actual pagespeed.conf settings for a repro.

-Josh

 

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[Eric Longuemare]

Should I send you a mail with it ?

[Michael N.]

I'm having the same issue.

I set debug in the URL with <URL>?PageSpeedFilters=+debug

pagespeed conf is like:

#
# Pagespeed Settings
#

pagespeed FileCachePath {{ nginx_cache_path }}/ngx_pagespeed_cache;
pagespeed ImageMaxRewritesAtOnce -1;

pagespeed EnableFilters convert_jpeg_to_webp,convert_to_webp_lossless,recompress_jpeg;
pagespeed EnableFilters collapse_whitespace,combine_css,convert_jpeg_to_progressive;
pagespeed EnableFilters rewrite_images,resize_rendered_image_dimensions,extend_cache;

pagespeed DisableFilters inline_images,inline_preview_images;
pagespeed DisableFilters lazyload_images,extend_cache_images,sprite_images;

pagespeed ImagePreserveURLs on;

pagespeed InPlaceResourceOptimization on;
pagespeed RewriteRandomDropPercentage 0;
pagespeed PreserveUrlRelativity on;
pagespeed ImageResolutionLimitBytes 128000000;
pagespeed RewriteDeadlinePerFlushMs 25;

pagespeed CriticalImagesBeaconEnabled false;

pagespeed StatisticsPath /ngx_pagespeed_statistics;
pagespeed MessagesPath /ngx_pagespeed_message;
pagespeed ConsolePath /pagespeed_console;
pagespeed AdminPath /pagespeed_admin;

pagespeed FileCacheSizeKb 1024000;
pagespeed FileCacheCleanIntervalMs 3600000;
pagespeed FileCacheInodeLimit 500000;

pagespeed LRUCacheKbPerProcess 8192;
pagespeed LRUCacheByteLimit 16384;

pagespeed MemcachedServers "mc1:11211,mc2:11211";

[Otto van der Schaaf]

I think this question is explained over at https://groups.google.com/d/msgid/mod-pagespeed-discuss/a6708ff5-1ce6-47b3-8313-bff425cafe5f%40googlegroups.com?utm_medium=email&utm_source=footer

TLDR; 

image resizing and inlining can't be performed without altering the image urls, and options enabling those will override image url preservation options.

Otto