PK77458: CACHED RESPONSES CONTAIN INCORRECT CONTENT TYPE ON IBM HTTP SERVER

APAR status

• Closed as program error.

Error description

• Responses cached via mod_mem_cache or mod_disk_cache may
  return incorrect Content-Type and Content-Encoding headers
  on cached requests.
  
  *) The Content-Type can mistakenly be transmitted as text/plain,
  the "default content type" as specified in the default
  httpd.conf as DefaultType.  This may result in "save file ..."
  dialogues in a web browser.
  
  *) The Content-Encoding header can be excluded on cached
  responses, which may result in corrupted page contents if
  compression is enabled in IBM HTTP Server.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users with mod_mem_cache or mod_disk_cache   *
  * loaded and at least one CacheEnable directive in httpd.conf. *
  ****************************************************************
  * PROBLEM DESCRIPTION: Unexpected values in Content-Encoding   *
  * and/or Content-Type HTTP response headers                    *
  ****************************************************************
  * RECOMMENDATION: Apply this fix if mod_mem_cache is in use    *
  ****************************************************************
  This only applies when static content is cached by mod_mem_cache
  or mod_disk_cache, which can generally be disabled with little
  effect.  Though the HTTP Server will process a bit more, the OS
  will generally do a better job cross-process.
  
  Cache modules save the outgoing headers before a limited set
  of Apache components can translate internal data structures
  into Content-Type and Content-Encoding headers.
  

Problem conclusion

• mod_mem_cache (and mod_disk_cache in IBM HTTP Server version 7)
  were updated to ensure the Content-Type and Content-Encoding
  processing occurs before the response is added to the cache.
  
  This fix is targeted for IHS fixpacks:
   6.0.2.35
   6.1.0.25
   7.0.0.5
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  IBM HTTP SERVER

• Fixed component ID

  5724J0801

Applicable component levels

• R60A PSN

     UP

• R60H PSN

     UP

• R60I PSN

     UP

• R60P PSN

     UP

• R60S PSN

     UP

• R60W PSN

     UP

• R60Z PSN

     UP

• R61A PSN

     UP

• R61H PSN

     UP

• R61I PSN

     UP

• R61P PSN

     UP

• R61S PSN

     UP

• R61W PSN

     UP

• R61Z PSN

     UP

• R700 PSN

     UP