topical media & game development

topical media & game development

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

alt-bot-lib-download-images.php / php


  <?php
  /*

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Copyright 2007, Michael Schrenk This software is designed for use with the book, "Webbots, Spiders, and Screen Scarpers", Michael Schrenk, 2007 No Starch Press, San Francisco CA W3C� SOFTWARE NOTICE AND LICENSE This work (and included software, documentation such as READMEs, or other related items) is being provided by the copyright holders under the following license. By obtaining, using and/or copying this work, you (the licensee) agree that you have read, understood, and will comply with the following terms and conditions. Permission to copy, modify, and distribute this software and its documentation, with or without modification, for any purpose and without fee or royalty is hereby granted, provided that you include the following on ALL copies of the software and documentation or portions thereof, including modifications: 1. The full text of this NOTICE in a location viewable to users of the redistributed or derivative work. 2. Any pre-existing intellectual property disclaimers, notices, or terms and conditions. If none exist, the W3C Software Short Notice should be included (hypertext is preferred, text is permitted) within the body of any redistributed or derivative code. 3. Notice of any changes or modifications to the files, including the date changes were made. (We recommend you provide URIs to the location from which the code is derived.) THIS SOFTWARE AND DOCUMENTATION IS PROVIDED "AS IS," AND COPYRIGHT HOLDERS MAKE NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE OR DOCUMENTATION WILL NOT INFRINGE ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS. COPYRIGHT HOLDERS WILL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF ANY USE OF THE SOFTWARE OR DOCUMENTATION. The name and trademarks of copyright holders may NOT be used in advertising or publicity pertaining to the software without specific, written prior permission. Title to copyright in this software and any associated documentation will at all times remain with copyright holders.
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*/

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# # alt-bot-libdownload_images.php POP3 Mail Routines # # This library provides routines # # #----------------------------------------------------------------------- # FUNCTIONS # # download_binary_file() # A binary-safe download routine for images # # mkpath( $path)
# Createa a directory path for downloaded images
#
# download_images_for_page($ target) # Downloads all images for a given target webpage # #----------------------------------------------------------------------- include_once(<alt-bot-lib-parse.php>); # include parse library include_once(<alt-bot-lib-http.php>); # include curl library include_once(<alt-bot-lib-resolve-addresses.php>); # include address resolution library

********************************************************************* download_binary_file( $file,$ ref) ------------------------------------------------------------- DESCRIPTION: Downloads an image file (binary safe) INPUT: $file Image file to download$ ref Referer value sent to target server OUTPUT: The image file is returned as a string *********************************************************************


  
  function download_binary_file( $file,$ ref)
      {
      # Open a PHP/CURL session
       $s = curl_init();
      
      # Configure the CURL command
      curl_setopt($ s, CURLOPT_URL,  $file); // Define target site
      curl_setopt($ s, CURLOPT_RETURNTRANSFER, TRUE);     // Return in string
      curl_setopt( $s, CURLOPT_BINARYTRANSFER, 1);        // Indicate binary transfer
          curl_setopt($ s, CURLOPT_REFERER,  $ref);            // Referer value
          curl_setopt($ s, CURLOPT_SSL_VERIFYPEER, FALSE);    // No certificate
          curl_setopt( $s, CURLOPT_FOLLOWLOCATION, TRUE);     // Follow redirects
          curl_setopt($ s, CURLOPT_MAXREDIRS, 4);             // Limit redirections to four
      
      # Execute the CURL command (Send contents of target web page to string)
       $downloaded_page = curl_exec($ s);
      
      # Close PHP/CURL session
      curl_close( $s);
      
      # return file
      return$ downloaded_page;
      }

********************************************************************* mkpath( $path)
-------------------------------------------------------------
DESCRIPTION:
Creates a complete directory structure
INPUT:$ file Image file to download $ref Referer value sent to target server
OUTPUT:
A directory structure, as defined by$ path is created This script is a modified version of a script originally posted on www.php.net *********************************************************************


  
  function mkpath( $path)
      {
      # Make the slashes are all single and lean the right way$ path=preg_replace('/(\/){2,}|(\\\){1,}/','/', $path); 
  
      # Make an array of all the directories in path$ dirs=explode("/", $path);
  
      # Verify that each directory in path exist. Create it if it doesn't$ path="";
      foreach ( $dirs as$ element)
          {
           $path.=$ element."/";
          if(!is_dir( $path))      // Directory verified here
              mkdir($ path);       // Created if it doesn't exist
           }
      }

********************************************************************* download_images_for_page( $target)
-------------------------------------------------------------
DESCRIPTION:
Downloads all images in the target web page and recreates the
original directory structure
INPUT:$ target Web page that references images OUTPUT: Downloads all images in the target web page and recreates the original directory structure *********************************************************************


  
  function download_images_for_page( $target)
      {
      echo "target =$ target\n";
      
      # Download the web page
       $web_page = http_get($ target,  $referer="");
      
      # Update the target in case there was a redirection$ target =  $web_page['STATUS']['url'];
      
      # Strip file name off target for use as page base$ page_base=get_base_page_address( $target);
      
      # Identify the directory where iamges are to be saved$ save_image_directory = "saved_images_".str_replace("http://", "",  $page_base);
      
      # Parse the image tags$ img_tag_array = parse_array( $web_page['FILE'], "$ <img", ">");
      
      if(count(img_tag_array)==0)
          {
          echo "No images found at  $target\n";
          exit;
          }
  
      # Echo the image source attribute from each image tag
      for($ xx=0;  $xx$ <count(img_tag_array);  $xx++)
          {$ image_path = get_attribute( $img_tag_array[$ xx],   $attribute="src");
          echo " image: ".$ image_path;
           $image_url = resolve_address($ image_path,  $page_base);
          if(get_base_domain_address($ page_base) == get_base_domain_address( $image_url))
              {
              # Make image storage directory for image, if one doesn't exist$ directory = substr( $image_path, 0, strrpos($ image_path, "/"));
               $directory = str_replace(":", "-",$ directory );
               $image_path = str_replace(":", "-",$ image_path );
              
              clearstatcache(); // clear cache to get accurate directory status
              if(!is_dir( $save_image_directory."/".$ directory))
                  mkpath( $save_image_directory."/".$ directory);
              
              # Download the image, report image size
               $this_image_file =  download_binary_file($ image_url,  $ref="");
              echo " size: ".strlen($ this_image_file);
              
              # Save the image
              if(stristr( $image_url, ".jpg") || stristr($ image_url, ".gif") || stristr( $image_url, ".png"))
                  {$ fp = fopen( $save_image_directory."/".$ image_path, "w");
                  fputs( $fp,$ this_image_file);
                  fclose( $fp);
                  echo "\n"; 
                  }
              }
          else
              {
              echo "\nSkipping off-domain image.\n";
              }
          }
      }
  ?>$

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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