wreckvshttr
Wreck is an HTTP client library for Node.js. It provides a simple, consistent API for making HTTP requests, including support for both the client and server side of an HTTP transaction.
Wreck is a very minimal but stable as it's part of Hapi web framework project. For web scraping, it doesn't offer required features like proxy configuration or http2 support so it's not recommended.
The aim of httr is to provide a wrapper for the curl package, customised to the demands of modern web APIs.
Key features:
- Functions for the most important http verbs: GET(), HEAD(), PATCH(), PUT(), DELETE() and POST().
- Automatic connection sharing across requests to the same website (by default, curl handles are managed automatically), cookies are maintained across requests, and a up-to-date root-level SSL certificate store is used.
- Requests return a standard reponse object that captures the http status line, headers and body, along with other useful information.
- Response content is available with content() as a raw vector (as = "raw"), a character vector (as = "text"), or parsed into an R object (as = "parsed"), currently for html, xml, json, png and jpeg.
- You can convert http errors into R errors with stop_for_status().
- Config functions make it easier to modify the request in common ways: set_cookies(), add_headers(), authenticate(), use_proxy(), verbose(), timeout(), content_type(), accept(), progress().
- Support for OAuth 1.0 and 2.0 with oauth1.0_token() and oauth2.0_token(). The demo directory has eight OAuth demos: four for 1.0 (twitter, vimeo, withings and yahoo) and four for 2.0 (facebook, github, google, linkedin). OAuth credentials are automatically cached within a project.
Example Use
```javascript
const Wreck = require('wreck');
// get request
Wreck.get('http://example.com', (err, res, payload) => {
if (err) {
throw err;
}
console.log(payload.toString());
});
// post request
const options = {
headers: { 'content-type': 'application/json' },
payload: JSON.stringify({ name: 'John Doe' })
};
Wreck.post('http://example.com', options, (err, res, payload) => {
if (err) {
throw err;
}
console.log(payload.toString());
});
```
```r
library(httr)
# GET requests:
resp <- GET("http://httpbin.org/get")
status_code(resp) # status code
headers(resp) # headers
str(content(resp)) # body
# POST requests:
# Form encoded
resp <- POST(url, body = body, encode = "form")
# Multipart encoded
resp <- POST(url, body = body, encode = "multipart")
# JSON encoded
resp <- POST(url, body = body, encode = "json")
# setting cookies:
resp <- GET("http://httpbin.org/cookies", set_cookies("MeWant" = "cookies"))
content(r)$cookies # get response cookies
```