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ngbg2.r

REBOL [ Title: "National Geographic Image of the Day Downloader" Date: 11-Sept-2007 Version: 1.2.5 File: %ngbg2.r Author: "Gordon Raboud" History: [ Date: 21-Sep-2001 Version: 1.0.0 Author: "Ian Monroe" Email: %ul303seyj001--sneakemail--com Web: http://mlug.missouri.edu/~eean/projects.php Date: 17-Jan-2004 Version: 1.1.1 Author: "Charles Mougel" Email: %charles--mougel--spinodo--com Web: http://www.spinodo.com Purpose: "Url updated" ] Library: [ level: 'intermediate platform: 'all type: [tool demo] domain: [markup text-processing web] tested-under: 'W2K support: none License: none ] Purpose: { Downloads all the "Picture Of The Day" images (current and past) from the National Geographic website and saves it to a location of your choice. Revisions: Version 1.2.5 Checked to see if the large wallpaper exists and if not to use the smaller wall paper image. Version 1.2.4 Changed from "Viewing" the POTD to "Browsing" the POTD which then allows the user to go back to see other pictures that may have been missed. Version 1.2.3 Added displays for current file name download. Added slider to set the number of downloads for this run. Version 1.2.2 Added a stop (abort) button. Version 1.2.1 I didn't like the silent operation so I added a progress meter. Version 1.2.0 Modified to download all past POD (pictures of the day) images starting from 2001-04-21 to current date. Also modified to store each POD with a unique filename and also download the description of the picture and save it as an HTML file with links to Next and Previous pictures. Updated the help files and their display using the Request/OK function instead of the dump to console. Added a directory requester for storing of files so users don't have to modify the code. Added a preferences file for storing this information as well as the maximum number of pictures per day to download. This version still uses the original NG website as it still works okay. I have been able to download all images from 2001-04-21 to today, 2006-06-09. It will only download images which exist on the server but don't exist on your local drive in the path specified. I put a 100 at a time limiter on the program because it seems that National Geographic has processes in place to limit the number of downloads or connections (possibly Denial Of Service attack blockers), because it seemed to hang when trying to download all of them at once. I tried again a few hours later and was able to download another 100. Like the version 1.0.0 it will download the large backdrop but it now gets the description from the original photo of the day page. It will display the current picture of the day and wait for the window to close before downloading the rest of the images. Version 1.1.0 by Charles Mougel: Used a different URL Version 1.0.0 by Ian Munroe: Downloads a single picture of the day - must be run everyday. The argument "-p" causes a "print to console". These directions can be seen by adding a "-h" agrument.} ] HelpString1: {This program downloads all the current picture of the days from NationalGeographic.com and saves them to a location of your choice. You can run this program at any time because it will only download images which exist on the server but don't already exist on your local drive in the path specified. Therefore, there are no worries about downloading the same picture twice and wasting time and bandwidth. It will download the backdrop from the large wallpaper page, but gets the description for the HTML page that is created for each picture from the original photo of the day page. ... Continue?} HelpString2: {This program will display the current picture of the day, (if not already downloaded), while downloading the rest of the images. The program will download about 100 images and this can be changed by using the slider or adjusting the second field in the NationalGeographicDownloadPrefs.txt file. If it has difficulty connecting or downloading the program will just stop. If this happens try the program again at a different time of day as the NatGeo site may be too busy. ... Continue?} PrefsHelpString1: {The first time this is run it will prompt you for a location to store the images and html files. It saves this in a prefs file so it won't ask you again. ... Continue?} PrefsHelpString2: {The directory requester that comes up may not be familar to most users but is easy to learn. Use the orange up arrow near the top right to move up a directory level and click on a directory name to display that directory's contents. Once you are at the directory that you want to save the images and html files (today and other days) click the "Open". ...Continue?} PrefsHelpString3: {A "Rebol - Security Check" window may open where you confirm that you want to browse your computer to find the directory to store the images. Because you know that you have run this program (and not some unauthorized user) select "Allow all". ... Continue?} ISO8601Date: func [Date [Date!]] [ to-string join Date/year ["-" copy/part tail join "0" [Date/month] -2 "-" copy/part tail join "0" [Date/day] -2 ] ] DateCntrStart: now/date DateCntrEnd: to-date 2001-04-21 TotalImages: now/date - 2001/04/21 DownloadCntr: 0 DailyMax: 50 ; to limit downloads and avoid being blacklisted. PreferencesFileName: "NationalGeographicDownloadPrefs.txt" CurrentDir: What-dir PrefsFullName: to-file join CurrentDir PreferencesFileName BackdropPic: load-thru/binary http://raboud.ca/images/2001-05-14_NatGeo_POD_380x380.jpg ; Get save directory from prefs file if prefs file exits ; If prefs file does not exist or is empty, use requester to get save ; directroy and write this information to the prefs file for next time. Either exists? PrefsFullName [ Success: open PrefsFullName Preferences: read/lines PrefsFullName Either (length? Preferences) > 0 [ FileNamePath: to-file first Preferences DailyMax: to-integer second Preferences ] [ FileNamePath: request-dir/title/keep "Select Directory/Folder to save Images and HTML pages" Either none? FileNamePath [ quit ] [ ; update the prefes file with directory location ; and with the daily max limit write PrefsFullName reduce [FileNamePath newline DailyMax] ] ] ][ Continue: Request HelpString1 If not Continue [quit] Continue: Request HelpString2 If not Continue [quit] Continue: Request PrefsHelpString1 If not Continue [quit] Continue: Request PrefsHelpString2 If not Continue [quit] Continue: Request PrefsHelpString3 If not Continue [quit] open/new PrefsFullName FileNamePath: request-dir/title/keep "Select Directory/Folder to save Images and HTML pages" Either none? FileNamePath [ quit ] [ ; update the prefes file with directory location ; and with the daily max limit write PrefsFullName reduce [FileNamePath Newline DailyMax] ] ] PrintStuff: false ; PrintStuff: True if system/script/args = "-p" [ PrintStuff: True ] if system/script/args = "-h" [ Continue: Request HelpString1 If not Continue [quit] Continue: Request HelpString2 If not Continue [quit] ] if PrintStuff [ print "Downloading National Geographic wallpaper.cgi web page..." ] ; Date format is ?month=mm&day=dd&year=yy (in any order of mm or dd or yy) ProgressView: view Layout [ Size 380x380 backdrop BackdropPic effect [blur] Text at 20x10 vh2 Blue "Downloading National Geograhic Images" Text white {Change The Number of Downloads For This Run (Edit the "Prefs" file is you want more than 100 ... and then don't move the Slider)} indent 20 DailyMaxSlider: Info with [size: 300x20 font/color: white font/size: 14] slider 300x20 with [data: (DailyMax / 100)] [ DailyMax: to-integer value * 100 DailyMaxSlider/text: DailyMax show DailyMaxSlider PrefsFullName: head PrefsFullName write PrefsFullName reduce [FileNamePath newline DailyMax] ] DailyMaxSlider/text: DailyMax Indent -20 Text white "Percentage Of All Available Files Downloaded" Indent 20 AllFilesProgress: Progress 300x20 DateCntrInfo: Info with [size: 300x20 font/color: 255.255.0 font/size: 14] Indent -20 Text "Percentage of Completed Downloads For This Run" Indent 20 DailyMaxProgress: Progress 300x20 DLNameInfo: Info with [size: 300x20 font/color: 255.255.0 font/size: 14] across pad 100x10 button 60x24 "Start" [ For DateCntr DateCntrStart DateCntrEnd -1 [ DateCntrInfo/text: DateCntr Show DateCntrInfo Either DownloadCntr < DailyMax [ wait .2 ; To give the system time for the "Stop" button to work ; Start from most current date and work backwards to oldest date PODMonth: join "0" [trim to-string DateCntr/month] PODMonth: copy/part tail PODMonth -2 PODDay: join "0" [trim to-string DateCntr/day] PODDay: copy/part tail PODDay -2 PODYear: copy/part tail to-string DateCntr/year -2 PODDateStr: join "?year=" [PODYear "&month=" PODMonth "&day=" PODDay] ngwebsite: join http://lava.nationalgeographic.com/cgi-bin/pod/enlarge.cgi [PODDateStr] PODDate: join "20" [PODYear "-" PODMonth "-" PODDay] Filename1: join FilenamePath [PODDate "_NatGeo_POD.jpg"] Filename2: join FilenamePath [PODDate "_NatGeo_POD_Desc.html"] PreviousDate: ISO8601Date DateCntr - 1 PreviousFile: join to-string PreviousDate ["_NatGeo_POD_Desc.html"] CurrentFile: join PODDate ["_NatGeo_POD.jpg"] NextDate: ISO8601Date DateCntr + 1 NextFile: join to-string NextDate ["_NatGeo_POD_Desc.html"] If not exists? Filename1 [ If exists? ngwebsite [ NGPage: read ngwebsite if PrintStuff [ prin join " parsing NGPage " PODDate ] ; Parse filename parse NGPage [thru "/pod/pictures/sm_wallpaper/" copy NameOfJpg to "^""] NameOfJpg: trim NameOfJpg If PrintStuff [ print join " - image name = " NameOfJpg ] DLNameInfo/text: NameOfJpg show DLNameInfo imageloc: join http://lava.nationalgeographic.com/pod/pictures/lg_wallpaper/ NameOfJpg if not exists? imageloc [ Comment: "Use small wall paper is large doesn't exist." imageloc: join http://lava.nationalgeographic.com/pod/pictures/sm_wallpaper/ NameOfJpg ] ; Parse Caption parse NGPage [thru "START caption and related" thru "place-photographer" thru "^">" copy PODPlace to "<" thru "place-photographer-sub" thru "^">" copy PODPhotographer to "<" thru "pod-caption" thru "^">" copy PODCaption to "</div>" ] HTMLStr: join "" [ "<!DOCTYPE HTML PUBLIC ^"-//W3C//DTD HTML 4.01 Transitional//EN^">" newline "<html>" newline "<head></head>" newline "<body>" newline "<table style=^"width: 100%; text-align: left; margin-left: auto; margin-right: auto;^"" newline "border=^"0^" cellpadding=^"2^" cellspacing=^"2^">" newline "<tbody>" newline "<tr>" newline " <td colspan=^"3^" rowspan=^"1^"><img style=^"width: 1024px; height: 768px;^"" newline " alt=^"" PODPlace "^"" newline " src=^"" CurrentFile "^"></td>" newline "</tr>" newline "<tr>" " <td style=^"text-align: center;^">" newline " <a href=^"" PreviousFile "^">Previous</a></td>" newline " <td style=^"width: 80%;^"><br>" newline "<Center><h2>" PODPlace "</h2><br>" newline PODPhotographer "</center><br>" newline PODCaption " </td>" newline " <td style=^"text-align: center;^">" newline " <a href=^"" NextFile "^">Next</a></td>" newline "</tr>" newline "</tbody>" newline "</table>" "</body>" newline "</html>" ] ; Download and save Image If exists? imageloc [ if PrintStuff [ print ["Downloading " imageloc " ..."] ] image: read/binary imageloc write/binary filename1 image DownloadCntr: DownloadCntr + 1 if PrintStuff [ print [filename1 " saved"] ] ; Save description write filename2 HTMLStr If DateCntr = DateCntrStart [ browse filename2 ] ] ] ] DailyMaxProgress/data: DownloadCntr / DailyMax Show DailyMaxProgress ][ wait 3 quit ] AllFilesProgress/data: 1 - ((DateCntr - DateCntrEnd) / TotalImages) Show AllFilesProgress ] wait 3 quit ] button 60x24 "Stop" [quit] ] If PrintStuff [halt]
halt ;; to terminate script if DO'ne from webpage
Notes
  • email address(es) have been munged to protect them from spam harvesters. If you are a Library member, you can log on and view this script without the munging.
  • (charles:mougel:spinodo:com)
  • (ul303seyj001:sneakemail:com)