Enable zip file downloading from query results

[Xiaopeng Xiong]

Thank Jacob, for your patient help.

I got the same results after apply the realpath.

I will still try to work it out. If it does not work, I will probably let php call the gzip command to do the task, and put the 
output file in a temp folder and remove afterwards. Let me try ... See what will happen



Best,
Xiaopeng



  ----- Original Message ----- 
  From: Delfos, Jacob 
  To: MAPSERVER-USERS at LISTS.UMN.EDU 
  Sent: Sunday, October 15, 2006 10:47 PM
  Subject: Re: [UMN_MAPSERVER-USERS] Enable zip file downloading from query results


  It is probably because of your add_dir. Try doing this:

  $zipdir = realpath(./yourfile.img);
  add_dir($zipdir);

  basically, realpath turns a relative path into an absolute path. This is the approach I have used to get the right path for this script.

  regards,

  Jacob






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    From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On Behalf Of Xiaopeng Xiong
    Sent: 16 October 2006 08:08
    To: MAPSERVER-USERS at LISTS.UMN.EDU
    Subject: Re: [UMN_MAPSERVER-USERS] Enable zip file downloading from query results


    This is great. Yes I think I will probably go this way you suggested. Thanks for the hints.

    But I found a small problem when use the zipfile.php. After I downloaded the zipped file to my windows machine via the zipfile.php, I could not use "extract to here" or "extract to folder XXX" of the Winzip functionality, it complains that "start of central directory not found; Zip file corrupt. Possible cause: file transfer error.". But I was enable to double click the .zip file and activate the Winzip window, then get individual files out in this way. 

    I am not sure whether I used the zipfile class right, I passed "./" to add_dir() since the files to be zipped are in the same directory as the .php file, and repeated passed a file name (e.g., test1.txt) to add_file().


    Thanks,
    Xiaopeng



      ----- Original Message ----- 
      From: Delfos, Jacob 
      To: MAPSERVER-USERS at LISTS.UMN.EDU 
      Sent: Sunday, October 15, 2006 7:37 PM
      Subject: Re: [UMN_MAPSERVER-USERS] Enable zip file downloading from query results


      Hi Xiaopeng,

      I think for a single file, you can do:
      <a href="zipfile.php?filename=[filename]">download zipped file</a>

      For downloading all files, I don't think there is a very straightforward way to do this, except by building up a URL on the fly. Perhaps you could use javascript to add to the URL, for example at the beginning of the template put:

      url="<a href=zipfile.php?filename='";

      and then for each record, do:

      url+="[filename],";

      then at the end of the template:

      url+="'>download all</a>";
      document.write(url);

      This is untested code, but I think that's how I would go about it. You would have to change zipfile.php to read in url, and use "explode" to get the file from the comma delimited list.

      regards,

      Jacob






------------------------------------------------------------------------
        From: Xiaopeng Xiong [mailto:xpxiong at purdue.edu] 
        Sent: 16 October 2006 06:26
        To: Delfos, Jacob; MAPSERVER-USERS at LISTS.UMN.EDU
        Subject: Re: [UMN_MAPSERVER-USERS] Enable zip file downloading from query results


        Thanks for the help. It works on the server side.

        But there are still another part of the problem. When the query result is returned to the 
        query template, how to access the "FileLink" attribute of each record? And how to 
        send these FileLinks to server side PHP file?


        Thanks,
        Xiaopeng



          ----- Original Message ----- 
          From: Delfos, Jacob 
          To: Xiaopeng Xiong ; MAPSERVER-USERS at LISTS.UMN.EDU 
          Sent: Thursday, October 12, 2006 11:29 PM
          Subject: RE: [UMN_MAPSERVER-USERS] Enable zip file downloading from query results


          Hi Xiaopeng,

          There is a file from "Catalist Creative" on their website, which does that:

          http://www.catalistcreative.com/tools/zipfile.php.txt

          I have used it a fair bit for this purpose. You basically have to modify it to point to the right files. If you use it, please make the following change, otherwise you will run into problems if you try to open the zip-file straight from Internet Explorer:

          Before the lines that say "Header ("Content ........", put another line that says:

          Header("Cache-Control: must-revalidate, post-check=0, pre-check=0");


          regards,

          Jacob





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            From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On Behalf Of Xiaopeng Xiong
            Sent: 13 October 2006 09:19
            To: MAPSERVER-USERS at LISTS.UMN.EDU
            Subject: [UMN_MAPSERVER-USERS] Enable zip file downloading from query results


            Hello List,


            I am very new to this field. I apologize if this question is not related but I do appreciate any suggestions.

            I have one index that can be queried using mapserver. The query results are like follows:

            Record   |     UL_X      |  FileLink
            1                456000        http://myweb.com/photo/15.tif
            2                460000        http://myweb.com/photo/38.tif
            3                464000        http://myweb.com/photo/41.tif

            Now what I want to realize is to provide an additional "Download_All" button in the query result page.
            Then when the user clicks the "Download_All" button, all the files in "FileLink" will be compressed online 
            into one (e.g., .zip) file and downloaded.

            How can this be realized? I'll apprecate any help or some reference to read.

            Thank you.


            Best,
            Xiaopeng
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