Monitors a product's price on Amazon and adds to cart as soon as price drops below threshhold.
Written in PhantomJS with CasperJS framework.
If you're on a Mac, it's quite simple using Homebrew.
brew install phantomjs
brew install casperjs
You may also download and install each from the websites above.
There are fields at the top of the script you will need to modify.
priceThreshhold
| This is the dollar amount for which the script will add the product to your cart once the price of the product falls below it. |
productUrl
|
This is the URL to the product page on Amazon.com. |
refreshInterval
|
This is the amount of time the script will wait
before refreshing the product page when the price is still above the
priceThreshhold, in milliseconds. Must be greater than zero.
|
scriptTimeout
|
This is the maximum amount of time the script will continue reloading the product page and checking the price, in milliseconds. Once this amount of time has elapsed, the script will exit. The default value is for 1 day. |
loginEmail
|
This is the email you login with to Amazon.com. |
loginPassword
|
This is your password. |
loginName
|
This is the first name Amazon has stored for your account. It's the name that shows up on the top right of the page when you're signed in. It's how the script tells whether or not your already signed in, thus being able to skip the signin step. |
casperjs --cookies-file=cookies.txt --disk-cache=yes casper-scrape.js
In the above command, cookies.txt can be any filename you want. It's
the plain-text file PhantomJS will use to store the cookie info from
signing in. When you run the script after the first time that file has
been created from the script, you will already be signed in. To sign
out, just delete the cookie file.
When running the script the first time, you should see output like this:
Loading homepage
Checking signed-in status
Going to signin
Signing in
Signed in successfully
Loading product page (try #1 - Wed Nov 28 2012 20:08:12 GMT-0500 (EST))
Checking price
Current price: $999.99 (999.99)
Under threshhold of 800? false
Loading product page (try #2 - Wed Nov 28 2012 20:08:18 GMT-0500 (EST))
Checking price
Current price: $999.99 (999.99)
Under threshhold of 800? false
This will continue until the price of the product falls below the
priceThreshhold. Once this happens, you'll see this:
Checking price
Current price: $688.00 (688.00)
Under threshhold of 800? true
Success! All systems GO!
Adding to cart
Selecting no protection coverage
Clicking edit-cart or proceed-to-checkout
Cart page
Done
In addition to all the output to your terminal above, a new directory called "images" has also been created storing the screen-captures of each of the steps run by the script. These help to debug if, for example, signing in isn't working.
Now you should be able to open your browser, sign in, and the product will be in your cart waiting for you to checkout. You will need to actually navigate to your cart to see it, as sometimes the cart item counter in the top right doesn't update until you load the cart page. But don't worry, it's there.
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent