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, ...)A URL, either relative or absolute, to navigate to.
Any additional httr config to use throughout the session.
A session.
A integer to select the ith link or a string to match the first link containing that text (case sensitive).
Elements to select. Supply one of css or xpath
depending on whether you want to use a CSS selector or XPath 1.0
expression.
An html_form to submit
Which button should be used to submit the form?
NULL, the default, uses the first button.
A string selects a button by its name.
A number selects a button using its relative position.
s <- session("http://hadley.nz")
s |>
session_jump_to("hadley.jpg") |>
session_jump_to("/") |>
session_history()
#> https://hadley.nz/
#> https://hadley.nz/hadley.jpg
#> - https://hadley.nz/
s |>
session_jump_to("hadley.jpg") |>
session_back() |>
session_history()
#> - https://hadley.nz/
#> https://hadley.nz/hadley.jpg
# \donttest{
s |>
session_follow_link(css = "p a") |>
html_elements("p")
#> Navigating to <https://posit.co>.
#> {xml_nodeset (20)}
#> [1] <p class="body-sm-semibold lg:body-md-semibold text-neutral-light lg:inl ...
#> [2] <p class="body-sm-semibold lg:body-md-semibold text-neutral-light lg:inl ...
#> [3] <p class="sh4 uppercase mb-[8px] text-blue1">\n Posit ...
#> [4] <p class="h5 text-blue-1">Super early bird registration is open, get tic ...
#> [5] <p class="body-lg-regular mt-[16px] text-blue1/[.62]">\n Join ...
#> [6] <p>Securely share data-science applications<br>\n across your team—and t ...
#> [7] <p>Our code is your code. Build on it. Share it. Improve people’s lives ...
#> [8] <p>Take the time and effort out of uploading, storing, accessing, and sh ...
#> [9] <p class="sh4 uppercase mb-[8px] text-blue1">\n Customer ...
#> [10] <p class="mt-[8px] body-md-regular text-blue1/[.62]">\n D ...
#> [11] <p class="mt-[16px] body-md-regular text-neutral-blue62 line-clamp-3">\n ...
#> [12] <p class="mt-[16px] body-md-regular text-neutral-blue62 line-clamp-3">\n ...
#> [13] <p class="description body-lg-regular text-neutral-light/70" style="">\n ...
#> [14] <p class="body-sm-regular text-blue1/[.62] mt-[25px]">\n ...
#> [15] <p class="ui-small uppercase text-blue1">\n P ...
#> [16] <p class="ui-small uppercase text-blue1">\n S ...
#> [17] <p class="ui-small uppercase text-blue1">\n R ...
#> [18] <p class="ui-small uppercase text-blue1">\n S ...
#> [19] <p class="ui-small uppercase text-blue1">\n contact u ...
#> [20] <p class="body-md-regular body-sm-regular">We use cookies to bring you t ...
# }