Net::Semantics3 is a Perl client for accessing the Semantics3 Products API, which provides structured information, including pricing histories, for a large number of products. See https://www.semantics3.com for more information.
API documentation can be found at https://www.semantics3.com/docs/
Net::Semantics3 can be installed through the CPAN:
$ perl -MCPAN -e "install Net::Semantics3"
To build and install from the latest source:
$ git clone git@github.com:Semantics3/semantics3-perl.git
$ cd semantics3-perl
$ perl Makefile.PL
$ make
$ make test
$ make install
- LWP::UserAgent
- OAuth::Lite::Consumer
- JSON::XS
In order to use the client, you must have both an API key and an API secret. To obtain your key and secret, you need to first create an account at https://www.semantics3.com/ You can access your API access credentials from the user dashboard at https://dashboard.semantics3.com.
Let's lay the groundwork.
use Net::Semantics3::Products;
# Your Semantics3 API Credentials
my $api_key = "SEM3xxxxxxxxxxxxxxxxxxxxxx";
my $api_secret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
# Set up a client to talk to the Semantics3 API
my $sem3 = Net::Semantics3::Products->new (
api_key => $api_key,
api_secret => $api_secret,
);
Let's run our first request! We are going to run a simple search fo the word "iPhone" as follows:
# Build the request
$sem3->products_field( "search", "iphone" );
# Run the request
my $productsRef = $sem3->get_products();
# View the results of the request
print STDERR Dumper( $productsRef );
The following requests show you how to interface with some of the core functionality of the Semantics3 Products API:
The example in our "Hello World" script returns the first 10 results. In this example, we'll scroll to subsequent pages, beyond our initial request:
# Build the request
$sem3->products_field( "search", "iphone" );
# Run the request
my $productsRef = $sem3->get_products();
# View the results of the request
print STDERR Dumper( $productsRef );
# Goto the next 'page'
my $page = 0;
while(my $productsRef = $sem3->iterate_products()) {
$page++;
print STDERR "We are at page = $page\n";
print STDERR "The results for this page are:\n";
print STDERR Dumper( $productsRef );
}
Running a UPC/EAN/GTIN query is as simple as running a search query:
# Build the request
$sem3->products_field( "upc", "883974958450" );
$sem3->products_field( "field", ["name","gtins"] );
# Run the request
my $productsRef = $sem3->get_products();
# View the results of the request
print STDERR Dumper( $productsRef );
Get the picture? You can run URL queries as follows:
$sem3->products_field( "url", "http://www.walmart.com/ip/15833173" );
my $productsRef = $sem3->get_products();
print STDERR Dumper( $productsRef );
Filter by price using the "lt" (less than) tag:
$sem3->products_field( "search", "iphone" );
$sem3->products_field( "price", "lt", 300 );
my $productsRef = $sem3->get_products();
print STDERR Dumper( $productsRef );
To lookup details about a cat_id, run your request against the categories resource:
# Build the request
$sem3->categories_field( "cat_id", 4992 );
# Run the request
my $categoriesRef = $sem3->get_categories();
# View the results of the request
print STDERR Dumper( $categoriesRef );
You can use webhooks to get near-real-time price updates from Semantics3.
You can register a webhook with Semantics3 by sending a POST request to "webhooks"
endpoint.
To verify that your URL is active, a GET request will be sent to your server with a verification_code
parameter. Your server should respond with verification_code
in the response body to complete the verification process.
my $params = {
webhook_uri => "http://mydomain.com/webhooks-callback-url"
};
my $res = $sem3->run_query("webhooks", $params, "POST");
print STDERR Dumper( $res ), "\n";
To fetch existing webhooks
my $res = $sem3->run_query("webhooks", undef, "GET");
print STDERR Dumper( $res ), "\n";
To remove a webhook
my $webhook_id = "7JcGN81u";
my $endpoint = "webhooks/" . $webhook_id ;
my $res = $sem3->run_query( $endpoint, undef, "DELETE" );
print STDERR Dumper( $res );
Once you register a webhook, you can start adding events to it. Semantics3 server will send you notifications when these events occur.
To register events for a specific webhook send a POST request to the "webhooks/{webhook_id}/events"
endpoint
my $params = {
"type" => "price.change",
"product" => {
"sem3_id" => "1QZC8wchX62eCYS2CACmka"
},
"constraints" => {
"gte" => 10,
"lte" => 100
}
};
my $webhook_id = "7JcGN81u";
my $endpoint = "webhooks/" . $webhook_id . "/events";
my $res = $sem3->run_query( $endpoint, $params, "POST" );
print STDERR Dumper( $res ), "\n";
To fetch all registered events for a give webhook
my $webhook_id = "7JcGN81u";
my $endpoint = "webhooks/" . $webhook_id . "/events";
my $res = $sem3->run_query($endpoint, undef, "GET");
print STDERR Dumper( $res ), "\n";
Once you have created a webhook and registered events on it, notifications will be sent to your registered webhook URI via a POST request when the corresponding events occur. Make sure that your server can accept POST requests. Here is how a sample notification object looks like
{
"type": "price.change",
"event_id": "XyZgOZ5q",
"notification_id": "X4jsdDsW",
"changes": [{
"site": "abc.com",
"url": "http://www.abc.com/def",
"previous_price": 45.50,
"current_price": 41.00
}, {
"site": "walmart.com",
"url": "http://www.walmart.com/ip/20671263",
"previous_price": 34.00,
"current_price": 42.00
}]
}
method | Description |
---|---|
$sem3->get_results_json() |
returns the result json string from the previous query |
$sem3->clear() |
clears all the fields in the query |
$sem3->run_query($endpoint, $rawJson, $method) |
You can use this method to send raw JSON string in the request |
Use GitHub's standard fork/commit/pull-request cycle. If you have any questions, email support@semantics3.com.
- Sivamani VARUN varun@semantics3.com
Copyright (c) 2015 Semantics3 Inc.
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