TODO

   1 Squid-3.0:
   2
   3   Feature freeze:
   4
   5   - overlapping helper feature implementation (plain or stateful or both).
   6   - Someone other than Robert to review the draft squid 3 release notes (in CVS already).
   7
   8   Other?
   9
  10   - Windows port (Merging in process, won't delay 3.0).
  11   - Generalize socket binding to allow for multipe ICP/HTCP/SNMP sockets
  12     (get rid of udp_incoming_address) (???)
  13
  14   Done items:
  15
  16   - epoll linkage.
  17   - reply_body_max_size syntax cleanups. (done)
  18   - Other sponsored work that needs to get into mainline sooner rather
  19     than later (None known of - RC).
  20   - Update automake and autoconf on squid-cache.org for the squid-3 CVS snapshot generation.  (done)
  21   - ESI client side streams support framework (done).
  22   - ESI (done).
  23   - Authentication tidyups in proxy_auth acl managagement (Done).
  24   - Appropriate parts of rproxy (Done).
  25   - Some kind of Range support to at least the level of 2.5 and earlier (Done).
  26
  27
  28 Squid-3.1
  29
  30   - always/never direct syntax cleanups.
  31   - refactoring of acl driven types to reduce amount of duplicated
  32     code (acl_check, acl_tos, acl_address, acl_size_t, ...)
  33   - Go over the old TODO (below) and sort out what has
  34      o) Been done
  35      o) Needs to be done, and when
  36      o) Can be ignored
  37   - ETag caching (???)
  38   - Customized logging capabilities
  39   - External logging
  40   - Other devel.squid-cache.org projects
  41   - header filtering improvements (bug #601)
  42
  43   Done Items:
  44
  45   - IPv6
  46
  47
  48 Later:
  49
  50   - Rework the store API like planned
  51   - Improved event driven comm code
  52   - Buffer management (required by store API and comm code improvements)
  53   - Improved reply processing to not reparse the reply headers several
  54     times
  55   - Implement HTCP authentication
  56   - Log HTCP queries somewhere, like htcp_query.log
  57   - There are various places where ICP means ICP/HTCP, and
  58     other places where it does not.  For example, cachemgr 'counters'
  59     stats like icp.pkts_sent count only ICP.  However, in 'peer_select'
  60     stats, ICP does include HTCP as well.
  61
  62
  63
  64
  65 ******************************************************************************
  66 Our OLD Todo List, still containing some interesting items.
  67 ******************************************************************************
  68
  69 ()      dont re-sibling requests which came from a sibling
  70 ()
  71
  72 (1) is high priority, (5) is low priority
  73 (**) Means we need this for the real 1.2 release
  74 ==============================================================================
  75
  76 (1)     A customizable cache replacement policy.  Ugh, this could be
  77         interesting since we just optimized the LRU replacement with a
  78         doubly-linked list.
  79
  80 (2)     be more persistent in forwarding requests; return fewer error pages
  81 (2)     Fix some problems with peer-selection.
  82                 - Allow for 'backup' parents
  83                 - An orderd list of siblings to try.
  84                 - Hash function load balancing
  85 (2)     Calculate Content-Length for multipart range replies (AR)
  86
  87 (3)     hit metering
  88 (3)     ETag support (makes metadata bigger--ack!)
  89 (3)     Efficient public peer access control *without ACLs*
  90         Bill Wichers <billw@unix0.waveform.net>
  91         Dave Zarzycki <zarzycki@ricochet.net>
  92         # distant_peer_deny (icmp rtt) (hops)
  93         #    If the ICP client is farther than "z" hops away,
  94         #    or if more than y% of pings to the client exceed
  95         #    x milliseconds, then deny.
  96         distant_peer_deny   200  75  10
  97 (3)     deny/allow tags for HTTP header fields (AR)
  98 (3)     LDAP support.  See http://miso.wwa.com/~donley/ and
  99         Clayton Donley <qa1049@ilms04.cig.mot.com>
 100 (3)     What to do about ACL's and URL escaping?
 101 (3)     Review RFC 2068 and RFC 2109 for header handing, especially
 102         Cache-Control.
 103
 104 (4) **  Everywhere that we use 'pattern' or such, use ACL elements instead.
 105         stoplist_pattern, refresh_pattern, ...  (DW)
 106 (4)     Refresh based on content types.  This means we'll need an enum of
 107         known content types added to StoreEntry.  Unknown types will lose.
 108 (4)     Write binary headers as metadata?
 109 (4)     HTML-escape special characters in errorConvert().
 110
 111 (5)     X-Proxy-hops header?
 112 (5)     internalize redirectors?
 113 (5)     For _popular_ objects, return hits if known to be stale, but then
 114         initiate an IMS/refresh in the background.
 115 (5)     #ifdefs to disable IP caching
 116 (5)     REST for failed ftp transfers.
 117 (5)     Customizable access logging.
 118 (5)     Inline DNS queries with native resolver calls.
 119 (5)     MD5 acl type
 120 (5)     return "ERR_TOO_LARGE" messages for replies with
 121         content-lengths larger than some limit.
 122 (5)     Bind HTTP/ICP sockets to multiple interfaces
 123 (5)     Custom X-Forwarded-For
 124
 125 DONE:
 126 + s/sprintf/snprintf/g
 127 + Write the text for all the error message files
 128 + fix all the assert(!ERR_FOO) placeholders
 129 + Finish hacking at storeCopy() to achieve in-memory sliding window
 130   for objects being retrieved.
 131 + make USE_PROXY_AUTH standard
 132 + single linked list for disk LRU replacement
 133 + Incorporate Pelletier's latest retry patch for 1.1
 134 (3) URLs --> MD5?
 135 (1) reconfigure (SIGHUP) causes problems with Config.cacheSwap.swapDirs[].
 136 (1) I think we're assuming persistent connections and not looking at
 137     the reply headers.
 138 (2) Write src/store_key_md5.c and lib/md5.c
 139 (2) SNMP interface
 140 (5) convert ipcache/fqdncache to double-linked list
 141     and lose qsort() calls.
 142 (3) AS # routing
 143         - whois -h whois.ra.net '\!gAS194'
 144         - Stevens V2 Ch.18
 145 (3) SIGHUP should reread error text files
 146 (4) support ftp://host/pub;type=d
 147 (5)     should we write clean store logs from the double-linked list so
 148         that they are sorted in order of last reference?  Then upon
 149         restart we won't have to worry about the list being unsorted
 150         and causing problems with the LRU magic value.
 151 (3) **  Make checkFailureRatio() work again.  (DW)
 152 (2) **  copy over -z semantics from 1.1; don't automatically wipeout
 153         cache (DW)
 154 (3) **  Make swap.state binary with fixed-size cache keys (AR)
 155 (3) **  Make sure every squid.conf option has documentation (??)
 156 (3) **  Store cache key and other metadata in swap files (KA)
 157 (3) **  Finish implementing the *_dump() functions in cache_cf.c (DW)
 158 (2) **  Fix cachemgr.cgi.  It doesn't understand some of the new
 159         output formats. (??)
 160 (2) **  Add "Squid" trailer to all error messages. (AR)
 161 (2) **  copy over 'test_reachability' from 1.1 (DW)
 162 (2) **  we don't properly handle the HTTP/1.1 'Connection' header (KA)
 163 (2) **  Code cleanup: (KA)
 164                 - Make sure the lib/*.c files do not use printf/fprintf.
 165                 - Replace bcopy with xmemcpy
 166 (4) **  FTP PUT (KA)
 167 (1)     SSL doesn't work with Proxy Authentication
 168 (3)     HTTP Header todo list (AR)
 169 (5)     replace "for" loops in md5.c with memcpy and memset
 170 (3) **  shrink-able memory pools (AR)
 171 (3) **  request-range (AR)
 172 (4) **  Double check that MemBuf.size is used correctly everywhere (AR)
 173 (3)     'no_cache' access list for specifing objects which should not
 174         be cached.
 175 (3)     Full request headers for CONNECT requests.
 176 (1) **  Send full HTTP requests in ICP messages (DW)
 177 (2)     Track cache keys (MD5) in memory utilization
 178 (3)     Resource limits.
 179 (3)     Arjan's external proxy auth patch is at
 180         http://www.iae.nl/users/devet/squid/proxy_auth/
 181 (3)     In some situations, a private-key reply needs to eject a
 182         public-key cached object.  For example when an object is
 183         first cachable, but later becomes uncachable.
 184 (4)     Configurable proxy-auth realm
 185 (4)     Configurable FQDN cache size