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# Copyright (C) 1999-2018
# Smithsonian Astrophysical Observatory, Cambridge, MA, USA
# For conditions of distribution and use, see copyright notice in "copyright"
package provide DS9 1.0
# get file via url
# used by Analysis and SAMP
proc GetFileURL {url fname} {
upvar $fname fn
ParseURL $url rr
switch -- $rr(scheme) {
ftp {GetFileFTP $rr(authority) $rr(path) $fn}
file {set fn $rr(path)}
http -
https -
default {GetFileHTTP $url $fn}
}
}
proc GetFileFTP {host path fn} {
global debug
set ftp [ftp::Open $host {ftp} {-ds9@} -mode passive]
if {$ftp > -1} {
set ftp::VERBOSE $debug(tcl,ftp)
set "ftp::ftp${ftp}(Output)" FTPLog
ftp::Type $ftp binary
ftp::Get $ftp $path $fn
ftp::Close $ftp
# clear error from tcllib ftp
global errorInfo
set errorInfo {}
}
}
proc GetFileHTTP {url fn} {
global ihttp
# this is such a freaking kludge
ParseURL $url foo
if {$foo(authority) == {cda.harvard.edu}} {
set ka 1
} else {
set ka 0
}
set ch [open $fn w]
if {[catch {http::geturl $url \
-channel $ch \
-keepalive $ka \
-binary 1 \
-timeout $ihttp(timeout) \
-headers "[ProxyHTTP]"} token]} {
close $ch
return
}
# reset errorInfo (may be set in http::geturl)
global errorInfo
set errorInfo {}
close $ch
if {[info exists token]} {
if {$foo(authority) == {cda.harvard.edu}} {
upvar 0 $token state
http::CloseSocket $state(sock) $token
}
HTTPLog $token
http::cleanup $token
}
}
# gets file via url and loads
# sync with redirection
# used by command line, SAMP, SIA
proc LoadURLFits {url layer mode} {
if {[string length $url] == 0} {
return
}
ParseURL $url r
switch -- $r(scheme) {
ftp {LoadURLFitsFTP $r(authority) $r(path) $layer $mode}
file {LoadURLFitsFile $r(path) $layer $mode}
http -
https -
default {LoadURLFitsHTTP $url $layer $mode}
}
}
proc LoadURLFitsFTP {host path layer mode} {
global loadParam
global ds9
global debug
set ftp [ftp::Open $host "ftp" "-ds9@" -mode passive]
if {$ftp > -1} {
set fn [tmpnam [file extension $path]]
set ftp::VERBOSE $debug(tcl,ftp)
set "ftp::ftp${ftp}(Output)" FTPLog
ftp::Type $ftp binary
if {[ftp::Get $ftp $path $fn]} {
LoadURLFitsFile $fn $layer $mode
}
ftp::Close $ftp
if {[file exists $fn]} {
catch {file delete -force $fn}
}
}
}
proc LoadURLFitsFile {fn layer mode} {
global loadParam
# alloc it because we can't assume it will last
set loadParam(file,type) fits
set loadParam(file,mode) $mode
set loadParam(load,type) allocgz
set loadParam(file,name) $fn
set loadParam(file,fn) $loadParam(file,name)
set loadParam(load,layer) $layer
ProcessLoad
}
proc LoadURLFitsHTTP {url layer mode} {
global ds9
global ihttp
ParseURL $url r
set fn [tmpnam [file extension $r(path)]]
set ch [open $fn w]
set token [http::geturl $url \
-channel $ch \
-binary 1 \
-timeout $ihttp(timeout) \
-headers "[ProxyHTTP]"]
# reset errorInfo (may be set in http::geturl)
global errorInfo
set errorInfo {}
catch {close $ch}
upvar #0 $token t
# Code
set code [http::ncode $token]
# Meta
set meta $t(meta)
# Mime-type
# we want to strip and extra info after ';'
regexp -nocase {([^;])*} $t(type) mime
# Content-Encoding
set encoding {}
foreach {name value} $meta {
if {[regexp -nocase ^content-encoding $name]} {
switch -- [string tolower $value] {
compress -
bzip2 {set encoding bzip2}
Z {set encoding compress}
pack -
z {set encoding pack}
default {}
}
}
}
HTTPLog $token
# Result?
switch -- $code {
200 -
203 {}
201 -
300 -
301 -
302 -
303 -
305 -
307 {
foreach {name value} $meta {
if {[regexp -nocase ^location$ $name]} {
global debug
if {$debug(tcl,http)} {
puts stderr "LoadURLFitsHTTP redirect $code to $value"
}
# clean up and resubmit
http::cleanup $token
unset token
if {[file exists $fn]} {
catch {file delete -force $fn}
}
set url $value
LoadURLFitsHTTP $url $layer $mode
return
}
}
}
default {
Error "HTTP [msgcat::mc {Error}] $code"
http::reset $token
return
}
}
http::cleanup $token
global debug
if {$debug(tcl,http)} {
puts stderr "LoadURLFitsHTTP: fn $fn : code $code : meta $meta : mime $mime : encoding $encoding"
}
switch -- [string tolower $mime] {
"application/octet-stream" {
# its never fails, someone can't get there mime types correct.
# Override the mime type based on path
switch -- [file extension $fn] {
.bz2 {set var(encoding) bzip2}
.Z {set var(encoding) compress}
.z {set var(encoding) pack}
}
}
"image/fits" -
"application/fits" {}
"application/fits-image" -
"application/fits-table" -
"application/fits-group" {}
"image/x-fits" -
"binary/x-fits" -
"application/x-fits" {}
"image/x-gfits" -
"binary/x-gfits" -
"image/gz-fits" -
"application/x-gzip" -
"display/gz-fits" {}
"image/fits-hcompress" -
"image/x-fits-h" {}
"image/bz2-fits" -
"display/bz2-fits" {set encoding bzip2}
"image/x-cfits" -
"binary/x-cfits" {set encoding compress}
"image/x-zfits" -
"binary/x-zfits" {set encoding pack}
"text/plain" {}
"text/html" -
default {
Error "[msgcat::mc {File not Found or Unable to load FITS data MIME type}] $mime"
return
}
}
# alloc it because we are going to delete it after load
global loadParam
set loadParam(file,type) fits
set loadParam(file,mode) $mode
set loadParam(load,type) allocgz
set loadParam(file,name) $fn
set loadParam(file,fn) $loadParam(file,name)
set loadParam(load,layer) $layer
# may have to convert the file, based on content-encoding
switch -- "$encoding" {
bzip2 {
catch {set ch [open "| bunzip2 < $fn " r]}
set loadParam(load,type) channel
set loadParam(channel,name) $ch
}
compress {
catch {set ch [open "| uncompress < $fn " r]}
set loadParam(load,type) channel
set loadParam(channel,name) $ch
}
pack {
catch {set ch [open "| pcat $fn " r]}
set loadParam(load,type) channel
set loadParam(channel,name) $ch
}
}
ProcessLoad
FinishLoad
if {[file exists $fn]} {
catch {file delete -force $fn}
}
}
proc OpenURLFits {{layer {}} {mode {}}} {
global fitsurl
set url $fitsurl
if {[EntryDialog [msgcat::mc {URL}] [msgcat::mc {Enter URL}] 80 url]} {
LoadURLFits $url $layer $mode
FinishLoad
set fitsurl $url
}
}
proc ProcessURLFitsCmd {varname iname} {
upvar $varname var
upvar $iname i
urlfits::YY_FLUSH_BUFFER
urlfits::yy_scan_string [lrange $var $i end]
urlfits::yyparse
incr i [expr $urlfits::yycnt-1]
}
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