session | R Documentation |
This set of functions allows you to simulate a user interacting with a website, using forms and navigating from page to page.
Create a session with session(url)
Navigate to a specified url with session_jump_to()
, or follow a link on the
page with session_follow_link()
.
Submit an html_form with session_submit()
.
View the history with session_history()
and navigate back and forward
with session_back()
and session_forward()
.
Extract page contents with html_element()
and html_elements()
, or get the
complete HTML document with read_html()
.
Inspect the HTTP response with httr::cookies()
, httr::headers()
,
and httr::status_code()
.
session(url, ...) is.session(x) session_jump_to(x, url, ...) session_follow_link(x, i, css, xpath, ...) session_back(x) session_forward(x) session_history(x) session_submit(x, form, submit = NULL, ...)
url |
A URL, either relative or absolute, to navigate to. |
... |
Any additional httr config to use throughout the session. |
x |
A session. |
i |
A integer to select the ith link or a string to match the first link containing that text (case sensitive). |
css, xpath |
Elements to select. Supply one of |
form |
An html_form to submit |
submit |
Which button should be used to submit the form?
|
s <- session("http://hadley.nz") s %>% session_jump_to("hadley-wickham.jpg") %>% session_jump_to("/") %>% session_history() s %>% session_jump_to("hadley-wickham.jpg") %>% session_back() %>% session_history() s %>% session_follow_link(css = "p a") %>% html_elements("p")
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.