This lesson will allow you to overcome such an obstacle. Theentire war diary is 80 pages long. Note thatthey are in sequential order. We want to download the. To do this, we need to design a scriptto generate all of the URLs for the pages in between and including thefirst and last page of the diary. Open your preferred text editor such as Komodo Edit and enter the codebelow. To download all 80 pages in the diary you must add one tothe top-value of the range because it is at this integer where theForLoop is told to stop.
This applies for any sequence of numbers yougenerate with this function. Additionally, the script will not properlyexecute if leading zeros are included in the range of integers, soyou must exclude them by leaving them in the string the URL. In thisexample I have parsed the URL so that only the last four digits of thestring are being manipulated by the ForLoop. The final product should look like this:. The ForLoop will automatically generate a sequential list of URLsbetween the range of two integers that you specified in the brackets,and will write them to a.
Adding n to the end of the string removes line-breaks,allowing Wget to read the. You do not need to use all of the digits in the URL to specify the range— just the ones between the beginning and end of the sequence you areinterested in. This is why only the last 4 digits of the string wereselected and was left intact.
Before moving on to the next stage of the downloading process, make sureyou have created a directory where you would like to save your files,and, for ease of use, locate it in the main directory where you keepyour documents. Youshould move the urls. To save time on future downloads, it is advisable to simplyrun the program from the directory you plan to download to. This can beachieved by saving the URL-Generator.
Within a few moments you should have all 80 pages of the war diarydownloaded to this directory. You can copy and move them into a newfolder as you please. After this lesson was originally published, the National Archvies of Australia changed their URL patterns and broke the links provided here.
We are preserving the original text for reference, however you may wish to skip to the next section. This lesson can be broadly applied to numerous archives, not justCanadian ones!
Say you wanted to download a manuscript from the National Archives ofAustralia, which has a much more aesthetically pleasing online viewerthan LAC, but is still limited by only being able to scroll through oneimage at a time.
This is somewhat misleading. Click on the firstthumbnail in the top right to view the whole page. The discrepancybetween the range of URLs and the total number of files means that youmay miss a page or two in the automated download — in this case thereare a few URLs that include a letter in the name of the.
This is going to happenfrom time to time when downloading from archives, so do not be surprisedif you miss a page or two during an automated download. Note that a potential workaroundcould include using regular expressions to make more complicated queries if appropriate for more, see the Understanding Regular Expressionslesson.
The recommended method to install wget on Mac is with Homebrew. Convert the links in the HTML so they still work in your local version. To be a good citizen of the web, it is important not to crawl too fast by using --wait and --limit-rate. This is extracting your entire site and can put extra load on your server. Be sure that you know what you do or that you involve the devs.
This means that it will download a document, then follow the links and then download those documents as well. It only takes a minute to sign up.
Connect and share knowledge within a single location that is structured and easy to search. Install it with Homebrew: brew install wget or MacPorts: sudo port install wget. For downloading files from a directory listing, use -r recursive , -np don't follow links to parent directories , and -k to make links in downloaded HTML or CSS point to local files credit xaccrocheur. To use curl and some Unix tools magic to get the files you could use something like.
For those of us who would rather use an application with a GUI, there is the inexpensive shareware program DeepVacuum for Mac OS X , which implements wget in a user-friendly manner, with a list of presets that can handle commonly-needed tasks. You can also save your own custom configurations as presets. Sign up to join this community.
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