ralgervshttpful
ralger is a small web scraping framework for R based on rvest and xml2.
It's goal to simplify basic web scraping and it provides a convenient and easy to use API.
It offers functions for retrieving pages, parsing HTML using CSS selectors, automatic table parsing and auto link, title, image and paragraph extraction.
Httpful is a simple Http Client library for PHP 7.2+. There is an emphasis of readability, simplicity, and flexibility – basically provide the features and flexibility to get the job done and make those features really easy to use.
Features
- Readable HTTP Method Support (GET, PUT, POST, DELETE, HEAD, PATCH and OPTIONS)
- Custom Headers
- Automatic "Smart" Parsing
- Automatic Payload Serialization
- Basic Auth
- Client Side Certificate Auth
- Request "Templates"
Example Use
```r
library("ralger")
url <- "http://www.shanghairanking.com/rankings/arwu/2021"
# retrieve HTML and select elements using CSS selectors:
best_uni <- scrap(link = url, node = "a span", clean = TRUE)
head(best_uni, 5)
#> [1] "Harvard University"
#> [2] "Stanford University"
#> [3] "University of Cambridge"
#> [4] "Massachusetts Institute of Technology (MIT)"
#> [5] "University of California, Berkeley"
# ralger can also parse HTML attributes
attributes <- attribute_scrap(
link = "https://ropensci.org/",
node = "a", # the a tag
attr = "class" # getting the class attribute
)
head(attributes, 10) # NA values are a tags without a class attribute
#> [1] "navbar-brand logo" "nav-link" NA
#> [4] NA NA "nav-link"
#> [7] NA "nav-link" NA
#> [10] NA
#
# ralger can automatically scrape tables:
data <- table_scrap(link ="https://www.boxofficemojo.com/chart/top_lifetime_gross/?area=XWW")
head(data)
#> # A tibble: 6 × 4
#> Rank Title `Lifetime Gross` Year
#>
#> 1 1 Avatar $2,847,397,339 2009
#> 2 2 Avengers: Endgame $2,797,501,328 2019
#> 3 3 Titanic $2,201,647,264 1997
#> 4 4 Star Wars: Episode VII - The Force Awakens $2,069,521,700 2015
#> 5 5 Avengers: Infinity War $2,048,359,754 2018
#> 6 6 Spider-Man: No Way Home $1,901,216,740 2021
```
```javascript
require 'vendor/autoload.php';
use Httpful\Request;
// make GET request
$response = \Httpful\Request::get("http://httpbin.org/get")
->send();
echo $response->body;
// make POST request
$data = array('name' => 'Bob', 'age' => 35);
$response = \Httpful\Request::post("http://httpbin.org/post")
->sendsJson()
->body(json_encode($data))
->send();
echo $response->body;
// add headers or cookies
$response = \Httpful\Request::get("http://httpbin.org/headers")
->addHeader("API-KEY", "mykey")
->addHeader("Cookie", "foo=bar")
->send();
echo $response->body;
```
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