Google Sitemaps Compression Error in Webmaster Tools

Question

We create Sitemap XML files and point to them in Google Webmaster Tools, which sporadically provide the following error message for some files :

Compression Error

The “fix” in the Google documentation does not actually give any hint about what might be wrong .

The file is created in .NET and compressed by System.IO.Compression.GZipStream and through the Recommended Method of Using MSDN .

It works when we open the file in 7-zip and just save the file without any changes.

Any clues?

Answer 1

OK, here are my thoughts on the problem. Obviously, it System.IO.Compression.GZipStreamcreates a file that is not corrupted, but still has minor problems that Google doesn't like.

Strightforward solution-and-check will be to switch to another compression library and see if that helps.

An even more difficult solution would be to rigorously test the specifications of the GZIP format . In particular, I would check (compare) the file headers (original and 7zip). Thus, you may find that it is wrong with the file and possibly fix it.

Answer 2

+1 @Akash. IIS ( IIS 6) . IIS , XML .

Answer 3

.htaccess, . , , .htaccess.

## EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType text/html "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 1 month"
</IfModule>


<IfModule mod_headers.c>
  <FilesMatch "\.(js|css|xml|gz)$">
    Header append Vary: Accept-Encoding
  </FilesMatch>
</IfModule>

# compress text, html, javascript, css, xml:
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript

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, , woorank.com, , Gzip. , , Google ,