| 1 | # -*- perl -*-
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| 2 | # w3http.pm --- send http requests, janl's 12" mix for w3mir
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| 3 | #
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| 4 | $VERSION=1.0.22;
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| 5 | #
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| 6 | # This implements http/1.0 requests. We'll have problems with http/0.9
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| 7 | # This is in no way specific to w3mir.
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| 8 | #
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| 9 | # IMPORTANT: The caller should initialize the C locale for some of the
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| 10 | # things here to work correctly (specifically the strftime function).
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| 11 | #
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| 12 | # This is a rewrite of http.pl by Oscar Nierstrasz; I copied the code he he
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| 13 | # copied from the camel book. Some functions written by Gorm Haug Eriksen
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| 14 | # ([email protected]) has been used as is.
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| 15 | #
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| 16 | # Contributors:
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| 17 | # Nicolai Langfeldt, [email protected]
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| 18 | # Gorm Haug Eriksen, [email protected]
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| 19 | # Chris Szurgot, [email protected]
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| 20 | # Bernhard Weisshuh, [email protected]
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| 21 | # Copying and modification is governed by the "Artistic License" enclosed in
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| 22 | # the w3mir distribution
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| 23 | #
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| 24 | # gorm :
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| 25 | # &w3http::get_last_modified return the last modified stamp on a file in
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| 26 | # the right format for use with http
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| 27 | #
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| 28 | # janl:
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| 29 | # &http::query: Send a http query. A completely general function to send a
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| 30 | # http query. Will extract header values, http response code and, optionaly,
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| 31 | # convert text files to local linefeed format.
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| 32 | #
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| 33 | # Variables to examine after a query
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| 34 | # $w3http::document: The document returned by the query, if any.
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| 35 | # $w3http::doclen: The length of the document
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| 36 | # $w3http::result: The numerical http result code. It may take these values:
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| 37 | # - Normal HTTP reply codes
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| 38 | # - 98: OS error, permanent, errormessage in $!
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| 39 | # - 99: Other permanent error: see $restext.
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| 40 | # - 100: Transient error: Timeout/connection broken
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| 41 | # $w3http::restext: The english(?) HTTP result or w3http generated message
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| 42 | # $w3http::header: The http header returned.
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| 43 | # $w3http::plaintexthtml: 1 if this doc is non-content-encoded text/html
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| 44 | # (as opposed to content-encoding: compressed content-type: text/html
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| 45 | # which needs decompression before we can inspect the html)
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| 46 | # The tests are somewhat longwinded so I do it just once here.
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| 47 | # %w3http::headval: Associative array of header values
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| 48 | # $w3http::headval{'CONTENT-TYPE'}: Derived content type, stripped of charset
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| 49 | # qualifiers and other distractions.
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| 50 | # $w3http::xfbytes: Transfered bytes, cumulative. Document part only.
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| 51 | # $w3http::headbytes: Bytes of headers received, cumulative.
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| 52 | #
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| 53 | # Variables that change http's behaviour/requests:
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| 54 | # $w3http::agent: User agent, default is basename of $0
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| 55 | # $w3http::from: Request is from, default is user@host
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| 56 | # $w3http::version: The http version to use, only 1.0 is known to me.
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| 57 | # $w3http::timeout: How long to wait for new data to arrive, default is 600sec
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| 58 | # $w3http::buflen: Network read buffer size, default is 4096. It might give a
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| 59 | # speedup to tune this for specific servers' so it matches their send
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| 60 | # size. This size can be detected if we want to, I think.
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| 61 | # $w3http::debug: 1 debuging output, 2, more, 3 queries and replies
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| 62 | # $w3http::verbose: 0: say nothing, 1: print progress info
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| 63 | # $w3http::convert: Convert text/* documents to local newline convention?
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| 64 | # The default is to do it.
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| 65 | # $w3http::proxyserver: The name of the proxyserver to use.
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| 66 | # $w3http::proxyport: The port of the proxyserver to use. 0 if no proxyserver.
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| 67 | # $w3http::proxyuser: If this is set proxy authentication will be used.
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| 68 | # $w3http::proxypasswd: The password for proxy authentication
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| 69 | #
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| 70 | # Things gotten from main:
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| 71 | # - $main::win32: 1 if win32 restrictions apply to this system
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| 72 | # - $main::nulldevice: Bit sink file/device on this system.
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| 73 | #
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| 74 | # History (european date format dd/mm/yy):
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| 75 | # janl ??/??/95 -- Rewrite finished
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| 76 | # szurgot ??/??/95 -- Win32 compatability
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| 77 | # janl 16/05/96 -- Added SAVEBIN option, based on idea by szurgot
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| 78 | # szurgot 03/05/96 -- Corrected typo in check for content-length against
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| 79 | # retreive document length. Added test for zero-length
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| 80 | # documents (Not retreived because not-modified)
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| 81 | # szurgot 19/05/96 -- Win32 adaptions, fixes.
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| 82 | # janl 19/05/96 -- Chris won an argument, and janl simplified http
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| 83 | # retrival loop (-> version 1.0.4)
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| 84 | # janl 09/09/96 -- Incorporated a patch submited by Michael Kriby -> 1.0.5
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| 85 | # janl 16/09/96 -- Support for authorization. -> 1.0.6
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| 86 | # janl 27/09/96 -- Support for Accept header, lack pointed out by
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| 87 | # [email protected]: ... HTTP/1.1 (§14.1) says
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| 88 | # ``If no Accept header field is present, then it is
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| 89 | # assumed that the client accepts all media types,
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| 90 | # earlier versions of the protocol suggest that only
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| 91 | # text/plain and text/html will be offered by default.''
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| 92 | # This contradicts my memory of a http/1.0 draft.
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| 93 | # Also added $ACCEPT option.
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| 94 | # janl 20/10/96 -- Now uses HTTP::Date to produce HTTP timestamps -> 1.0.7
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| 95 | # janl 27/10/96 -- Didn't use to check if gethostbyname worked -> 1.0.8
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| 96 | # janl 02/12/96 -- Forgot a unlink when renaming temporary files.
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| 97 | # janl 21/02/97 -- Multipele $ACCEPT options work. -> 1.0.9
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| 98 | # janl 19/03/97 -- Now issues Host: header -> 1.0.10
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| 99 | # janl 10/04/97 -- Changed from wwwurl to URI::URL, and various related
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| 100 | # changes. -> 1.0.11
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| 101 | # janl 09/05/97 -- Microsoft ISS servers are _so_ broken -> 1.0.12
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| 102 | # (don't close the write end of the HTTP socket after
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| 103 | # sending a query to them)
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| 104 | # janl 12/05/97 -- New version of perl caught some typos, fixed
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| 105 | # longstanding bug in the newline conversion bit.
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| 106 | # -> 1.0.13
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| 107 | # janl 06/06/97 -- Demand Loading of MIME::BASE64 -> 1.0.14
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| 108 | # janl 01/12/97 -- FAT filesystems drops LSB of modtime. Patch from
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| 109 | # Greg Lindhorst ([email protected])
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| 110 | # -- whoami does not exist on win32, hardwire a default
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| 111 | # value (unknown) (also Greg L.) -> 1.0.15
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| 112 | # janl 01/22/98 -- Proxy authentication as outlined by Christian Geuer
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| 113 | # janl 02/20/98 -- Complex 'content-type' headers handled. -> 1.0.17
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| 114 | # janl 04/20/98 -- Only newline convert text/html, everything else is
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| 115 | # handled as binary. -> 1.0.18
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| 116 | # janl 12/05/98 -- Store tmpfile in its final destination directory
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| 117 | # avoiding asking movefile move it across filesystems.
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| 118 | # -> 1.0.19
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| 119 | # janl 01/08/98 -- Timeout fix from Michael Gusev, also flag short doc
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| 120 | # as error.
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| 121 | # janl 24/09/98 -- Better error handling -> 1.0.20
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| 122 | # bkw 17/12/98 -- Fixed problem with tempfile-generation when
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| 123 | # running in forget-mode (-f)
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| 124 | # janl 05/01/99 -- Referer: dropped if argument not true -> 1.0.21
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| 125 | # janl 13/04/99 -- Added workaround for broken win32 perl resolving.
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| 126 |
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| 127 | package w3http;
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| 128 |
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| 129 | require 5.002;
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| 130 | use Socket;
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| 131 | use HTTP::Date;
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| 132 | use Sys::Hostname;
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| 133 | use URI::URL;
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| 134 |
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| 135 | # Suplementary libwww-perl:
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| 136 | sub URI::URL::_generic::basename {
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| 137 | my $self = shift;
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| 138 | my @p = $self->path_components;
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| 139 | my $old = $p[-1];
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| 140 | if (@_) {
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| 141 | splice(@p, -1, 1, shift);
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| 142 | $self->path_components(@p)
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| 143 | }
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| 144 | $old;
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| 145 | }
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| 146 |
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| 147 |
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| 148 | END {
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| 149 | # Remove tmp file and such in here. That means that main:: gotta catch
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| 150 | # interrupt signals and exit on them, so ENDs are executed.
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| 151 | }
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| 152 |
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| 153 | use strict;
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| 154 | # Global variables, we want to share them:
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| 155 | use vars qw($GET $HEAD $GETURL $HEADURL $IFMOD $IFMODF $AUTHORIZ $REFERER);
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| 156 | use vars qw($SAVEBIN $ACCEPT $NOUSER $FREEHEAD $agent $version $timeout);
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| 157 | use vars qw($debug $convert $proxyserver $proxyport $xfbytes $headbytes);
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| 158 | use vars qw($verbose $result $restext $header $document);
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| 159 | use vars qw($plaintexthtml %headval $progress $doclen $proxyuser);
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| 160 | use vars qw($proxypasswd);
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| 161 |
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| 162 | my $hasAlarm; # Win32 does not have any alarm
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| 163 | my $chime; # Has the alarm gone off yet?
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| 164 | my %address; # My own DNS cache
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| 165 | my $savALRM; # Saved ALRM handler
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| 166 | my $savPIPE; # Saved PIPE handler
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| 167 |
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| 168 | # The main:: program should detect if we're running on win32 or not,
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| 169 | # somehow
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| 170 | if ($main::win32) {
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| 171 | warn "win32\n";
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| 172 | # Compensate for lacks of win32 perl.
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| 173 | $hasAlarm=0;
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| 174 | # Seems to be unavailable in win32/perl5.001. It has to be in 5.003!
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| 175 | # eval "sub sockaddr_in {
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| 176 | # ($port, $thataddr) = @_;
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| 177 | # $sockaddr = 'S n a4 x8';
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| 178 | # return pack($sockaddr, &AF_INET, $port, $thataddr);
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| 179 | # }";
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| 180 | } else {
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| 181 | $hasAlarm=1;
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| 182 | }
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| 183 |
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| 184 |
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| 185 | # Find out some things
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| 186 | my $thishost = hostname();
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| 187 | my $proto = getprotobyname("tcp");
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| 188 |
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| 189 | (my $name, undef) = gethostbyname($thishost);
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| 190 | chomp(my $user = $ENV{'LOGNAME'} || $ENV{'USER'} || `whoami` || 'unknown');
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| 191 | my $from = "$user\@$name";
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| 192 |
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| 193 | my $nl = "\r\n";
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| 194 | # Default values, change by assignment in using-program.
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| 195 | $agent = $0; $agent =~ s~.*/~~; # Basename
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| 196 | $version= "1.0";
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| 197 | $timeout= 600; # Timeout while waiting for data/connection
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| 198 | my $buflen = 4096; # recv buffer length
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| 199 | $debug = 0; # Debuging output?
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| 200 | $convert = 1; # Convert newlines of text docs to local format
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| 201 | $proxyserver=''; # Proxy server.
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| 202 | $proxyport=0; # Proxy server port. 0 if no proxy.
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| 203 | $proxyuser=''; # Username for proxy authentication
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| 204 | $proxypasswd=''; # Password for proxy authentication
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| 205 | $xfbytes=0; # 0 bytes transfered, cumulative
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| 206 | $headbytes=0; # 0 bytes of headers, cumulative
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| 207 | $doclen=0; # 0 bytes in doc, pr. document
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| 208 | my $tmpfile="w3mir$$.tmp"; # Temporary filename
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| 209 | $verbose=0; # Verbosenes, 0: silent, 1: progress info
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| 210 |
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| 211 | # Query opcodes
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| 212 | $GET = 1; # GET query. Arg: host,port,path
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| 213 | $HEAD = 2; # HEAD query. Arg: host,port,path
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| 214 | $GETURL = 3; # GET query. Arg: url
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| 215 | $HEADURL = 4; # HEAD query. Arg: url
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| 216 | # Here we lack PUT, which is not implemented
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| 217 | # Modify query thus:
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| 218 | $IFMOD = 101; # If-modified after: Arg: HTTP-date-str
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| 219 | $IFMODF = 102; # If-modified after file: Arg: local-file-name
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| 220 | $AUTHORIZ= 103; # Basic authorization. Arg: 'user:password'
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| 221 | $REFERER = 104; # Referer: Arg: Referer
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| 222 | $SAVEBIN = 105; # Write binary files to disk. Arg: File name
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| 223 | # If this opcode is used then main must provide
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| 224 | # a &main::movefile(oldname,newname) procedure
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| 225 | # that handles moving the tmp file to the
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| 226 | # final name/location.
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| 227 | $ACCEPT = 106; # Accept header value: Arg: value
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| 228 | $NOUSER = 107; # Don't insert user header. Arg: none
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| 229 | $FREEHEAD= 999; # Freeform header, one line. Arg: header
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| 230 |
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| 231 | sub query {
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| 232 | # Build and send a HTTP query. And also receive response - janl 95/09/18
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| 233 | #
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| 234 | # Return codes: 0 if it didn't work. 1 if it did work.
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| 235 | # HTTP style result code in w3http::$result and message in w3http::$restext
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| 236 |
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| 237 | # We do next to no argument type checking btw.
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| 238 |
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| 239 | my($host,$port,$request,$query,$method,$inp,$linp,$saveto,$save,$arg);
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| 240 | my($start,$wantbytes,$thataddr,$err,$headb,$tmpf,$ldoc,$nouser,$q,$accept);
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| 241 | my($origreq,$req_o,$plaintext);
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| 242 |
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| 243 | # Something ought to be said
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| 244 | $result=99;
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| 245 | $restext='w3http: internal error';
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| 246 | $nouser=0;
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| 247 |
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| 248 | if ($version ne '1.0') {
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| 249 | warn "Unknown HTTP version $version, no request sent\n";
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| 250 | return 0;
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| 251 | }
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| 252 |
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| 253 | $accept=$saveto=$query='';
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| 254 |
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| 255 | # Find out what to ask for
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| 256 |
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| 257 | while (defined($arg=shift)) {
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| 258 | if ($arg == $GET) {
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| 259 | $host=shift;
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| 260 | $port=shift;
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| 261 | $request=shift;
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| 262 | $req_o=url 'http://'.$host.':'.$port.$request;
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| 263 | if ($proxyport) {
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| 264 | $query.='GET http://'.$req_o->as_string;
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| 265 | } else {
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| 266 | $query.='GET '.$req_o->epath;
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| 267 | }
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| 268 | $query.=' HTTP/'.$version.$nl;
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| 269 | } elsif ($arg == $HEAD) {
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| 270 | $host=shift;
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| 271 | $port=shift;
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| 272 | $request=shift;
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| 273 | $req_o=url 'http://'.$host.':'.$port.$request;
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| 274 | if ($proxyport) {
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| 275 | $query.='HEAD '.$req_o->as_string;
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| 276 | } else {
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| 277 | $query.='HEAD '.$req_o->epath;
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| 278 | }
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| 279 | $query.=' HTTP/'.$version.$nl;
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| 280 | } elsif ($arg == $GETURL) {
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| 281 | $req_o=shift;
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| 282 | $req_o=url $req_o unless ref $req_o;
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| 283 | ($method,undef,undef,$host,$port,$request,undef,$q) = $req_o->crack;
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| 284 | if ($proxyport) {
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| 285 | $query.='GET '.$req_o->as_string;
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| 286 | } else {
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| 287 | $q=$req_o->equery;
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| 288 | $query.='GET '.$request.($q?"?$q":'');
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| 289 | }
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| 290 | $query.=' HTTP/'.$version.$nl;
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| 291 | } elsif ($arg == $HEADURL) {
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| 292 | $req_o=shift;
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| 293 | $req_o=url $req_o unless ref $req_o;
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| 294 | if ($proxyport) {
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| 295 | $query.='HEAD '.$req_o->as_string;
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| 296 | } else {
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| 297 | $q=$req_o->equery;
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| 298 | $query.='HEAD '.$req_o->epath.($q?"?$q":'');
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| 299 | }
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| 300 | $query.=' HTTP/'.$version.$nl;
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| 301 | } elsif ($arg == $IFMOD) {
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| 302 | $query.='If-Modified-Since: '.(shift).$nl;
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| 303 | } elsif ($arg == $IFMODF) {
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| 304 | $query.='If-Modified-Since: '.&last_modified(shift).$nl;
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| 305 | } elsif ($arg == $AUTHORIZ) {
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| 306 | # Demand-load MIME::Base64
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| 307 | if (!defined(&MIME::Base64::encode)) {
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| 308 | eval "use MIME::Base64;";
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| 309 | die "w3http: Could not load MIME::Base64 module necessary for authentication\n"
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| 310 | unless defined(&MIME::Base64::encode);
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| 311 | }
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| 312 | $query.='Authorization: Basic '.MIME::Base64::encode(shift,'').$nl;
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| 313 | } elsif ($arg == $REFERER) {
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| 314 | my($referer)=shift;
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| 315 | $query.='Referer: '.$referer.$nl if $referer;
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| 316 | } elsif ($arg == $SAVEBIN) {
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| 317 | $saveto=shift;
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| 318 | } elsif ($arg == $ACCEPT) {
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| 319 | $accept.='Accept: '.(shift).$nl;
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| 320 | } elsif ($arg == $NOUSER) {
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| 321 | $nouser=1;
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| 322 | } elsif ($arg == $FREEHEAD) {
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| 323 | $query.=(shift).$nl;
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| 324 | } else {
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| 325 | warn "Unknown http query opcode: $arg\n";
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| 326 | }
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| 327 | # Insert the last parts of the query:
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| 328 | }
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| 329 |
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| 330 | $query.='Host: '.$req_o->netloc.$nl;
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| 331 | $query.='From: '.$from.$nl unless $nouser;
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| 332 |
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| 333 | $accept='Accept: */*'.$nl unless $accept;
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| 334 |
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| 335 | if ($proxyport) {
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| 336 | # Use proxy instead of originserver
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| 337 | $host=$proxyserver;
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| 338 | $port=$proxyport;
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| 339 |
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| 340 | # Add authentication stuff to query
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| 341 | if ($proxyuser) {
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| 342 | # Demand-load MIME::Base64
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| 343 | if (!defined(&MIME::Base64::encode)) {
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| 344 | eval "use MIME::Base64;";
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| 345 | die "w3http: Could not load MIME::Base64 module necessary for authentication\n"
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| 346 | unless defined(&MIME::Base64::encode);
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| 347 | }
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| 348 |
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| 349 | $query.='Proxy-Authorization: Basic '.
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| 350 | MIME::Base64::encode($proxyuser.':'.$proxypasswd);
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| 351 |
|
|---|
| 352 | print STDERR "\nProxyuser: [$proxyuser]\nProxypasswd: [$proxypasswd]\n"
|
|---|
| 353 | if $debug>=2;
|
|---|
| 354 | }
|
|---|
| 355 | }
|
|---|
| 356 |
|
|---|
| 357 | $query.='User-Agent: '.$agent.$nl.$accept.$nl;
|
|---|
| 358 |
|
|---|
| 359 | # If we're using proxy then set up things...
|
|---|
| 360 | print STDERR "\nQUERY:\n",$query,"---\n" if $debug>=2;
|
|---|
| 361 |
|
|---|
| 362 | # win32 fix: this should be added in case of troubles with
|
|---|
| 363 | # gethostbyname. possible reason: nameserver down?
|
|---|
| 364 | if ($host =~ /^\d+(\.\d+){3}$/) {
|
|---|
| 365 | # in case gethostbyname will not work ... ;-)
|
|---|
| 366 | $address{$host} = pack 'C4', (split /\./, $host);
|
|---|
| 367 | }
|
|---|
| 368 |
|
|---|
| 369 | # Find out who to ask, check if we know already
|
|---|
| 370 | if (exists($address{$host})) {
|
|---|
| 371 | # We know
|
|---|
| 372 | $thataddr=$address{$host};
|
|---|
| 373 | } else {
|
|---|
| 374 | # Cache miss, get and remember.
|
|---|
| 375 | (my $fqdn, undef, undef, undef, $thataddr) = gethostbyname($host);
|
|---|
| 376 | # Hostname lookup failure? Cache even misses.
|
|---|
| 377 | if (defined($fqdn)) {
|
|---|
| 378 | print STDERR "Lookup of $host:\nFQDN: $fqdn\n"
|
|---|
| 379 | if $debug;
|
|---|
| 380 | $address{$host}=$thataddr;
|
|---|
| 381 | $address{$fqdn}=$thataddr if $fqdn ne $host;
|
|---|
| 382 | } else {
|
|---|
| 383 | $thataddr=$address{$host}=undef;
|
|---|
| 384 | }
|
|---|
| 385 | }
|
|---|
| 386 |
|
|---|
| 387 | # Check if lookup failure, return
|
|---|
| 388 | if (!defined($thataddr)) {
|
|---|
| 389 | $restext='Host lookup failure';
|
|---|
| 390 | return;
|
|---|
| 391 | }
|
|---|
| 392 |
|
|---|
| 393 | $port=80 unless defined($port) && $port;
|
|---|
| 394 |
|
|---|
| 395 | # When connected we might receive SIGPIPE. I'm not sure if the
|
|---|
| 396 | # default behaviour of dying is beneficial in that case. If we get
|
|---|
| 397 | # alarm a timeout has expired.
|
|---|
| 398 | $savPIPE = $SIG{'PIPE'};
|
|---|
| 399 | $savALRM = $SIG{'ALRM'};
|
|---|
| 400 |
|
|---|
| 401 | $chime=0; # There has been no alarm yet
|
|---|
| 402 | $SIG{'ALRM'} = \&timeout;
|
|---|
| 403 | $SIG{'PIPE'} = \&ignore;
|
|---|
| 404 |
|
|---|
| 405 | # Close the socket, just in case, and ignore error returns
|
|---|
| 406 | close(FS);
|
|---|
| 407 |
|
|---|
| 408 | socket(FS, AF_INET, SOCK_STREAM, $proto) or return &oserror;
|
|---|
| 409 | warn "Got my socks on\n" if $debug;
|
|---|
| 410 |
|
|---|
| 411 | my $paddr = sockaddr_in($port, $thataddr);
|
|---|
| 412 | connect(FS, $paddr) or return &oserror;
|
|---|
| 413 | warn "Connected\n" if $debug;
|
|---|
| 414 |
|
|---|
| 415 | # Arrange timeout
|
|---|
| 416 | alarm($timeout) if $hasAlarm;
|
|---|
| 417 |
|
|---|
| 418 | # We have, in fact, received SIGPIPE on this line:
|
|---|
| 419 | send(FS,$query,0) or return &oserror;
|
|---|
| 420 |
|
|---|
| 421 | if ($chime) {
|
|---|
| 422 | $result=100;
|
|---|
| 423 | $restext='timeout sending query';
|
|---|
| 424 | return &resetsign;
|
|---|
| 425 | }
|
|---|
| 426 |
|
|---|
| 427 | $header='';
|
|---|
| 428 | $document='';
|
|---|
| 429 | $inp=' 'x$buflen;
|
|---|
| 430 | $doclen=$chime=$plaintext=$plaintexthtml=$save=0;
|
|---|
| 431 |
|
|---|
| 432 | # Breaks some M$ ISS servers:
|
|---|
| 433 | # shutdown(FS,1); # Half-close socket, sending now not allowed
|
|---|
| 434 |
|
|---|
| 435 | print STDERR ", receiving header" if $verbose>0;
|
|---|
| 436 |
|
|---|
| 437 | # Retrive HTTP response HEADER. Why do I use recv and not <FS>?
|
|---|
| 438 | # Because then the timeout can work correctly!
|
|---|
| 439 | while (1) {
|
|---|
| 440 | # Set up alarm to ensure recv returns within a reasonable timeframe
|
|---|
| 441 | alarm($timeout) if $hasAlarm;
|
|---|
| 442 | $err = recv(FS,$inp,$buflen,0);
|
|---|
| 443 | # recv returned, cancel alarm.
|
|---|
| 444 | alarm(0) if $hasAlarm;
|
|---|
| 445 |
|
|---|
| 446 | # If there has been a timeout, then we quit now. The recv man page
|
|---|
| 447 | # does not seem to allow recv to return the bytes received up to
|
|---|
| 448 | # the timeout.
|
|---|
| 449 | if ($chime) {
|
|---|
| 450 | $result=100;
|
|---|
| 451 | $restext='timeout fetching document';
|
|---|
| 452 | $!=0;
|
|---|
| 453 | if ($save) {
|
|---|
| 454 | unlink($tmpf) ||
|
|---|
| 455 | warn "Could not unlink $tmpf: $!\n";
|
|---|
| 456 | }
|
|---|
| 457 | return &resetsign;
|
|---|
| 458 | }
|
|---|
| 459 |
|
|---|
| 460 | # recv returnes the undefined value on error
|
|---|
| 461 | if (!defined($err)) {
|
|---|
| 462 | warn "Error in recv: $!\n";
|
|---|
| 463 | last;
|
|---|
| 464 | }
|
|---|
| 465 |
|
|---|
| 466 | $linp=length($inp);
|
|---|
| 467 |
|
|---|
| 468 | # If the returned input was 0 in length then we've gotten to the
|
|---|
| 469 | # end of the response.
|
|---|
| 470 | last unless $linp;
|
|---|
| 471 |
|
|---|
| 472 | # Accounting
|
|---|
| 473 | $xfbytes += $linp;
|
|---|
| 474 | $doclen += $linp;
|
|---|
| 475 |
|
|---|
| 476 | # Accumulate input
|
|---|
| 477 | $header.=$inp;
|
|---|
| 478 |
|
|---|
| 479 | # eof(SOCKET) has strange semantics it seems
|
|---|
| 480 | # last if eof(FS);
|
|---|
| 481 |
|
|---|
| 482 | # Check if header is complete
|
|---|
| 483 | last if ($header =~ m/(\r?\n\r?\n)/);
|
|---|
| 484 | }
|
|---|
| 485 |
|
|---|
| 486 | if (length($header)==0) {
|
|---|
| 487 | $restext='the HTTP reply header is empty!';
|
|---|
| 488 | return &resetsign;
|
|---|
| 489 | }
|
|---|
| 490 |
|
|---|
| 491 | if ($header =~ m/(\r?\n\r?\n)/) {
|
|---|
| 492 | $header=$`;
|
|---|
| 493 | $document=$';
|
|---|
| 494 | } else {
|
|---|
| 495 | $header=$document;
|
|---|
| 496 | }
|
|---|
| 497 |
|
|---|
| 498 | # Adjust accounting
|
|---|
| 499 | $headb = length($header)+length($1);
|
|---|
| 500 | $headbytes += $headb;
|
|---|
| 501 | $xfbytes -= $headb;
|
|---|
| 502 | $doclen -= $headb;
|
|---|
| 503 |
|
|---|
| 504 | # Pick headers to pieces
|
|---|
| 505 | ($result,$restext,%headval)=&analyze_header($header);
|
|---|
| 506 |
|
|---|
| 507 | print STDERR "REPLY:\n",$header,"\n---\n" if $debug>=2;
|
|---|
| 508 |
|
|---|
| 509 | # Check if the document is a non-encoded text document. The contents
|
|---|
| 510 | # could be (x-)?compress or (x-)gzip coded (compressed in other
|
|---|
| 511 | # words).
|
|---|
| 512 |
|
|---|
| 513 | $plaintext=defined($headval{'CONTENT-TYPE'}) &&
|
|---|
| 514 | (substr($headval{'CONTENT-TYPE'},0,5) eq 'text/' || 0) &&
|
|---|
| 515 | !defined($headval{'content-encoding'});
|
|---|
| 516 | $plaintexthtml=$plaintext &&
|
|---|
| 517 | ($headval{'CONTENT-TYPE'} eq 'text/html');
|
|---|
| 518 |
|
|---|
| 519 | if ($result==200) {
|
|---|
| 520 |
|
|---|
| 521 | # Save this to a file, or not? Never save html files.
|
|---|
| 522 | if ($saveto && !$plaintexthtml) {
|
|---|
| 523 | # We're going to save this document directly into a file. This
|
|---|
| 524 | # stresses the VM less when getting the large binares so often
|
|---|
| 525 | # found at cool sites.
|
|---|
| 526 | $save=1;
|
|---|
| 527 |
|
|---|
| 528 | # Find a temporary filename
|
|---|
| 529 | $tmpf=url "file:$saveto";
|
|---|
| 530 | $tmpf->basename($tmpfile);
|
|---|
| 531 | $tmpf=$tmpf->unix_path;
|
|---|
| 532 |
|
|---|
| 533 | # Find suitable final filename, one with no URL escapes
|
|---|
| 534 | $saveto=(url "file:$saveto")->unix_path;
|
|---|
| 535 |
|
|---|
| 536 | # If output to stdout then send it directly there rather than
|
|---|
| 537 | # using disk unnecesarily.
|
|---|
| 538 | $tmpf='-' if ($saveto eq '-');
|
|---|
| 539 |
|
|---|
| 540 | # If output is nulldevice (running -f), use it also for tmpfile,
|
|---|
| 541 | # since it would otherwise try to create it in /dev under unix.
|
|---|
| 542 | $tmpf=$main::nulldevice if ($saveto eq $main::nulldevice);
|
|---|
| 543 |
|
|---|
| 544 | warn "USING TMPFILE: $tmpf\n" if $debug;
|
|---|
| 545 |
|
|---|
| 546 | open(SAVE,">$tmpf") ||
|
|---|
| 547 | die "Could not open tmp file: $tmpf: $!\n";
|
|---|
| 548 | binmode SAVE; # It's a binary file...
|
|---|
| 549 | }
|
|---|
| 550 |
|
|---|
| 551 | if ($verbose>0) {
|
|---|
| 552 | print STDERR ", document";
|
|---|
| 553 | print STDERR "->disk" if $save;
|
|---|
| 554 | }
|
|---|
| 555 |
|
|---|
| 556 | # Now retrive document itself. Se comments in header loop
|
|---|
| 557 | $start=time;
|
|---|
| 558 | $wantbytes = defined($headval{'content-length'})?
|
|---|
| 559 | $headval{'content-length'}:0;
|
|---|
| 560 |
|
|---|
| 561 | $ldoc=length($document);
|
|---|
| 562 |
|
|---|
| 563 | while (1) {
|
|---|
| 564 | alarm($timeout) if $hasAlarm;
|
|---|
| 565 | recv(FS,$inp,$buflen,0);
|
|---|
| 566 | alarm(0) if $hasAlarm;
|
|---|
| 567 |
|
|---|
| 568 | if ($chime) {
|
|---|
| 569 | $result=100;
|
|---|
| 570 | $restext='timeout fetching document';
|
|---|
| 571 | $!=0;
|
|---|
| 572 | if ($save) {
|
|---|
| 573 | unlink($tmpf) ||
|
|---|
| 574 | warn "Could not unlink $tmpf: $!\n";
|
|---|
| 575 | }
|
|---|
| 576 | return &resetsign;
|
|---|
| 577 | }
|
|---|
| 578 |
|
|---|
| 579 | $linp=length($inp);
|
|---|
| 580 |
|
|---|
| 581 | last unless $linp || $ldoc;
|
|---|
| 582 | $ldoc = 0;
|
|---|
| 583 |
|
|---|
| 584 | $xfbytes += $linp;
|
|---|
| 585 | $doclen += $linp;
|
|---|
| 586 |
|
|---|
| 587 | if ($verbose>0 && time-$start>5) {
|
|---|
| 588 | # Write progress info ...
|
|---|
| 589 | if ($wantbytes) {
|
|---|
| 590 | $progress = sprintf " %3d%%", $doclen/$wantbytes*100;
|
|---|
| 591 | } else {
|
|---|
| 592 | $progress = sprintf " %d", $doclen;
|
|---|
| 593 | }
|
|---|
| 594 | print STDERR $progress, "\ch"x(length($progress));
|
|---|
| 595 | # ...every 5 seconds
|
|---|
| 596 | $start=time;
|
|---|
| 597 | }
|
|---|
| 598 |
|
|---|
| 599 | $document.=$inp;
|
|---|
| 600 |
|
|---|
| 601 | if ($save) {
|
|---|
| 602 | $err = print SAVE $document;
|
|---|
| 603 | die "Error writing $tmpf: $!\n" unless $err;
|
|---|
| 604 | $document='';
|
|---|
| 605 | }
|
|---|
| 606 |
|
|---|
| 607 | # The eof test seems to work very oddly for sockets.
|
|---|
| 608 | # last if eof(FS);
|
|---|
| 609 | }
|
|---|
| 610 |
|
|---|
| 611 | close(FS); # Close socket completely
|
|---|
| 612 |
|
|---|
| 613 | print STDERR "DOCUMENT:\n----\n",$document,"\n----\n" if $debug>=255;
|
|---|
| 614 |
|
|---|
| 615 | if ($wantbytes &&
|
|---|
| 616 | $wantbytes != $doclen) {
|
|---|
| 617 | $result=100;
|
|---|
| 618 | $restext='transfer error; too many bytes in document';
|
|---|
| 619 | $restext='document was incomplete' if ($wantbytes > $doclen) ;
|
|---|
| 620 | print STDERR "SHORT DOCUMENT" if $debug>=16;
|
|---|
| 621 | if ($save) {
|
|---|
| 622 | unlink($tmpf) || warn "Could not unlink $tmpf: $!\n";
|
|---|
| 623 | }
|
|---|
| 624 | return &resetsign;
|
|---|
| 625 | }
|
|---|
| 626 |
|
|---|
| 627 | # warn "XFB: $xfbytes, DL: $doclen\n";
|
|---|
| 628 | if ($save) {
|
|---|
| 629 | close(SAVE);
|
|---|
| 630 | &main::movefile($tmpf,$saveto);
|
|---|
| 631 | }
|
|---|
| 632 |
|
|---|
| 633 | # If this is a non-encoded text file and we're supposed to convert
|
|---|
| 634 | # foreign newlines then we do it. It would be faster to do this
|
|---|
| 635 | # with each chunk of input in the input loop, but this gives us
|
|---|
| 636 | # two problems:
|
|---|
| 637 | # - A \r\n newline could be split into two chunks. Thus escaping
|
|---|
| 638 | # newline conversion.
|
|---|
| 639 | # - It messes up the received bytes accounting rather badly.
|
|---|
| 640 | #
|
|---|
| 641 | # This used to be a test for $plaintext, the problem is that too
|
|---|
| 642 | # many documents were typed as text/plain and so we corrupted
|
|---|
| 643 | # binary files. This is bad. So now we're more paranoid about it:
|
|---|
| 644 | # Only HTML gets converted.
|
|---|
| 645 | if ($convert && $plaintexthtml) {
|
|---|
| 646 | # Change non unix newlines to unix newlines. bare \r is known
|
|---|
| 647 | # from macintosh (they hadta be different didn't they?), \r\n is
|
|---|
| 648 | # known as 'network format' and from numerous systems, among
|
|---|
| 649 | # them ms-dos.
|
|---|
| 650 | $document =~ s~\r~\n~g unless $document =~ s~\r\n~\n~g;
|
|---|
| 651 | warn "Newlines converted(?)\n" if $debug;
|
|---|
| 652 | }
|
|---|
| 653 |
|
|---|
| 654 | } # if $result == 200
|
|---|
| 655 |
|
|---|
| 656 | &resetsign;
|
|---|
| 657 | return 1;
|
|---|
| 658 | }
|
|---|
| 659 |
|
|---|
| 660 |
|
|---|
| 661 | sub analyze_header {
|
|---|
| 662 | my($header)=@_;
|
|---|
| 663 | my($result,$restext,%headval,$hdln,$key,$value);
|
|---|
| 664 |
|
|---|
| 665 | # Summary of the http spec on headers (with my comments):
|
|---|
| 666 | # - Each header line ends in CRLF (or just LF, or maybe even just CR,
|
|---|
| 667 | # anyways, it's easier if all is LF).
|
|---|
| 668 | $header =~ s/\r/\n/mg unless $header =~ s/\r\n/\n/mg;
|
|---|
| 669 | # - If a line starts with space then it's a continuation of the previous
|
|---|
| 670 | # line (these I fold into one line).
|
|---|
| 671 | $header =~ s/\n\s/ /mg;
|
|---|
| 672 | # - The header field names are case insensitive (so I convert them to
|
|---|
| 673 | # lowercase)
|
|---|
| 674 | # - A field may appear twice, that is equivalent to listing the values
|
|---|
| 675 | # in a comma separated list (so I fold them into a comma separated list)n
|
|---|
| 676 | # - The field name and the field value are separated by ': '
|
|---|
| 677 | ($result,$restext) = $header =~ m~^HTTP/\d\.\d (\d\d\d) (.*)~;
|
|---|
| 678 | # Shave off http result code from the header
|
|---|
| 679 | $header =~ s~^.*\n~~;
|
|---|
| 680 |
|
|---|
| 681 | warn "Header:\n$header\n---\n" if $debug>=3;
|
|---|
| 682 |
|
|---|
| 683 | warn "Result: $result, Text: $restext\n" if $debug>=2;
|
|---|
| 684 |
|
|---|
| 685 | %headval=();
|
|---|
| 686 |
|
|---|
| 687 | foreach $hdln (split(/\r?\n/m,$header)) {
|
|---|
| 688 | ($key,$value)=split(': ',$hdln,2);
|
|---|
| 689 | $key="\L$key";
|
|---|
| 690 | # Strip leading&trailing space off the reply, some servers use
|
|---|
| 691 | # copious space after.
|
|---|
| 692 | $value =~ s/^\s+|\s+$//g;
|
|---|
| 693 | print STDERR "K: '$key', V: '$value'\n" if $debug>=2;
|
|---|
| 694 | if (defined($headval{$key})) {
|
|---|
| 695 | $headval{$key}.=", ".$value;
|
|---|
| 696 | } else {
|
|---|
| 697 | $headval{$key}=$value;
|
|---|
| 698 | }
|
|---|
| 699 | }
|
|---|
| 700 |
|
|---|
| 701 | # See if there are any type parameters in the content-type header
|
|---|
| 702 | # and if so remove them.
|
|---|
| 703 | if (defined($headval{'content-type'})) {
|
|---|
| 704 | my $val=$headval{'content-type'};
|
|---|
| 705 | ($val,undef)=split(';',$val,2) if ($val =~ /;/);
|
|---|
| 706 | $headval{'CONTENT-TYPE'}=$val;
|
|---|
| 707 | }
|
|---|
| 708 |
|
|---|
| 709 | return ($result,$restext,%headval);
|
|---|
| 710 | }
|
|---|
| 711 |
|
|---|
| 712 |
|
|---|
| 713 | sub last_modified {
|
|---|
| 714 | # will return the last modified time for a local file as a HTTP
|
|---|
| 715 | # timestamp.
|
|---|
| 716 |
|
|---|
| 717 | my(@tmp) = stat($_[0]); # file doesn't exist ok to fetch
|
|---|
| 718 |
|
|---|
| 719 | # FAT file systems strip the LSB of the file time. Add it back in
|
|---|
| 720 | # here before asking the server about a modified file. The only way
|
|---|
| 721 | # this can fail is if the newer server file was saved one second
|
|---|
| 722 | # after the first version (very unlikely). This isn't needed for
|
|---|
| 723 | # NTFS file systems, but there is no good portable Perl way to
|
|---|
| 724 | # determine the file system type.
|
|---|
| 725 | $tmp[9] = $tmp[9] | 1 if ( $main::win32 );
|
|---|
| 726 |
|
|---|
| 727 | # now we got the last modified in a 32 bit integer. time to convert
|
|---|
| 728 | # it and return
|
|---|
| 729 | return time2str($tmp[9]);
|
|---|
| 730 | }
|
|---|
| 731 |
|
|---|
| 732 |
|
|---|
| 733 | sub timeout {
|
|---|
| 734 | # Set timeout flag. The using procedure has to set other result codes.
|
|---|
| 735 | $chime=1; # When this is 1 then the alarm has gone off
|
|---|
| 736 | print STDERR "TIMEOUT!!!!\n" if $debug>=16;
|
|---|
| 737 | }
|
|---|
| 738 |
|
|---|
| 739 |
|
|---|
| 740 | sub ignore {
|
|---|
| 741 | warn "I got SIGPIPE, ignoring it...\n";
|
|---|
| 742 | }
|
|---|
| 743 |
|
|---|
| 744 |
|
|---|
| 745 | sub resetsign {
|
|---|
| 746 | return 0 if !defined($savALRM);
|
|---|
| 747 | $SIG{'ALRM'}=$savALRM;
|
|---|
| 748 | undef $savALRM;
|
|---|
| 749 | # $SIG{'PIPE'}=$savPIPE;
|
|---|
| 750 | return 0;
|
|---|
| 751 | }
|
|---|
| 752 |
|
|---|
| 753 |
|
|---|
| 754 | sub oserror {
|
|---|
| 755 |
|
|---|
| 756 | resetsign;
|
|---|
| 757 |
|
|---|
| 758 | $result=98;
|
|---|
| 759 | $restext='w3http: OS error';
|
|---|
| 760 | return 0;
|
|---|
| 761 |
|
|---|
| 762 | }
|
|---|
| 763 |
|
|---|
| 764 |
|
|---|
| 765 | 1;
|
|---|
