Stepster

Parsing library

Usage

Parse main node
(setf page (parse "uri"))

Collect stuff from page

To collect all div elements
(collect-from page 'div)

To collect all links
(collect-from page 'a :attr 'href)

Or simply
(extract-urls page)

Also it is possible to set up filter
(collect-from page 'a :attr 'href :test #'same-domain :test-args "uri")

All divs with class "card"
(collect-from page 'div :test #'(lambda (node arg) (equal (ss:attribute node 'class) arg)) :test-args '"card")

Extract functions

Get all links from page
(extract-urls page test arg)

All input names
(extract-input-names page)

Js sources
(extract-js-src page)

Forms
(extract-forms page)

Download functions

(download-file "uri" "path/to/file")

(download-page "uri" "path/to/file")

(download-all-images "uri" "path/to/dir")

Json works

Recursively parse value of one element from json
(ss:jfinder json "value")

Also possible to set full path or part of the path to element
(ss:jfinder json '("page" "engine_version" "value"))

(ss:jfinder json '("engine_version" "value"))

Recursively parse list of elements values from array

CL-USER> json ;; may also be a string
(:|infiniteSearchResult|
 ((:|itemId| 276843344 :|modelVersion|
   "ml_recommendations_engine.recsys_lightfm_desc_mixed.v1" :|score|
   0.05633471119569102d0)
  (:|itemId| 271451418 :|modelVersion|
   "ml_recommendations_engine.recsys_lightfm_desc_mixed.v1" :|score|
   0.05633471119569102d0)
  (:|itemId| 274323904 :|modelVersion|
   "ml_recommendations_engine.recsys_lightfm_desc_mixed.v1" :|score|
   0.05633471119569102d0)))
CL-USER> (ss:collect-json json '("itemId" "score"))
((276843344 0.05633471119569102d0) (271451418 0.05633471119569102d0)
 (274323904 0.05633471119569102d0))

Create json back with this values with

CL-USER> (ss:pack-with '("Id" "value") (ss:collect-json json '("itemId" "score")))
(("Id" 276843344 "value" 0.05633471119569102d0)
 ("Id" 271451418 "value" 0.05633471119569102d0)
 ("Id" 274323904 "value" 0.05633471119569102d0))
CL-USER> (ss:pack-to-json '("Id" "value") (ss:collect-json json '("itemId" "score")))
"[{\"Id\":276843344,\"value\":0.05633471119569102},{\"Id\":271451418,\"value\":0.05633471119569102},{\"Id\":274323904,\"value\":0.05633471119569102}]"

Utilities functions

Return plump attribute from node
(attribute node 'attr)

Return text from all of the children nodes.
(concat-node-text page)

Installation

Quicklisp.

(ql:quickload :stepster)

License

Licensed under the MIT License.