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doi-utils.el
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doi-utils.el
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;;; doi-utils.el --- DOI utilities for making bibtex entries
;; Copyright (C) 2015-2021 John Kitchin
;; Author: John Kitchin <[email protected]>
;; Keywords: convenience
;; Version: 0.1
;; Package-Requires: ((org-ref))
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http:https://www.gnu.org/licenses/>.
;;; Commentary:
;; This package provides functionality to download PDFs and bibtex entries from
;; a DOI, as well as to update a bibtex entry from a DOI. It depends slightly
;; on org-ref, to determine where to save pdf files too, and where to insert
;; bibtex entries in the default bibliography.
;; The principle commands you will use from here are:
;; - doi-utils-get-bibtex-entry-pdf with the cursor in a bibtex entry.
;; - doi-utils-insert-bibtex-entry-from-doi to insert a bibtex entry at your cursor, clean it and try to get a pdf.
;; - doi-utils-add-bibtex-entry-from-doi to add an entry to your default bibliography (cleaned with pdf if possible).
;; - doi-utils-update-bibtex-entry-from-doi with cursor in an entry to update its fields.
;;; Code:
(defvar url-http-end-of-headers)
(declare-function org-ref-find-bibliography "org-ref-core")
(declare-function org-ref-clean-bibtex-entry "org-ref-core")
(declare-function bibtex-completion-edit-notes "bibtex-completion")
(declare-function org-bibtex-yank "org-bibtex")
(declare-function org-ref-possible-bibfiles "org-ref-core")
(declare-function f-ext? "f")
(declare-function f-entries "f")
(declare-function s-match "s")
(eval-when-compile
(require 'cl-lib))
(require 'bibtex)
(require 'dash)
(require 'json)
(require 'org) ; org-add-link-type
(or (require 'ol-bibtex nil t)
(require 'org-bibtex)) ; org-bibtex-yank
(require 'url-http)
(require 'url-handlers)
(require 'org-ref-utils)
(require 'hydra)
;;* Customization
(defgroup doi-utils nil
"Customization group for doi-utils."
:tag "DOI utils"
:group 'doi-utils)
(defcustom doi-utils-download-pdf
t
"Try to download PDFs when adding bibtex entries when non-nil."
:type 'boolean
:group 'doi-utils)
(defcustom doi-utils-open-pdf-after-download
nil
"Open PDF after adding bibtex entries."
:type 'boolean
:group 'doi-utils)
(defcustom doi-utils-timestamp-field
"DATE_ADDED"
"The bibtex field to store the date when an entry has been added."
:type 'string
:group 'doi-utils)
(defcustom doi-utils-timestamp-format-function
'current-time-string
"The function to format the timestamp for a bibtex entry.
Set to a function that returns nil to avoid setting timestamps in the entries.
e.g. (lambda () nil)"
:type 'function
:group 'doi-utils)
(defcustom doi-utils-dx-doi-org-url
"https://doi.org/"
"Base url to retrieve doi metadata from. A trailing / is required."
:type 'string
:group 'doi-utils)
(defcustom doi-utils-metadata-function 'doi-utils-get-json-metadata
"Function for retrieving json metadata from `doi-utils-dx-doi-org-url'.
The default is `doi-utils-get-json-metadata', but it sometimes
fails with a proxy. An alternative is
`doi-utils-get-json-metadata-curl' which requires an external
program to use curl."
:type 'function
:group 'doi-utils)
(defcustom doi-utils-async-download t
"Use `doi-utils-async-download-pdf' to get pdfs asynchrounously.
If nil use `doi-utils-get-bibtex-entry-pdf' synchronously."
:type 'boolean
:group 'doi-utils)
;;* Getting pdf files from a DOI
;; The idea here is simple. When you visit http:https://dx.doi.org/doi or
;; https://doi.org/doi, you get redirected to the journal site. Once you have
;; the url for the article, you can usually compute the url to the pdf, or find
;; it in the page. Then you simply download it.
;; There are some subtleties in doing this that are described here. To get the
;; redirect, we have to use url-retrieve, and a callback function. The callback
;; does not return anything, so we communicate through global variables.
;; url-retrieve is asynchronous, so we have to make sure to wait for it to
;; finish.
(defvar *doi-utils-waiting* t
"Stores waiting state for url retrieval.")
(defvar *doi-utils-redirect* nil
"Stores redirect url from a callback function.")
(defun doi-utils-redirect-callback (&optional status)
"Callback for `url-retrieve' to set the redirect.
Optional argument STATUS Unknown why this is optional."
(when (plist-get status :error)
(signal (car (plist-get status :error)) (cdr(plist-get status :error))))
(when (plist-get status :redirect) ; is nil if there none
(setq *doi-utils-redirect* (plist-get status :redirect)))
;; we have done our job, so we are not waiting any more.
(setq *doi-utils-waiting* nil))
;; To actually get the redirect we use url-retrieve like this.
(defun doi-utils-get-redirect (doi)
"Get redirect url from `doi-utils-dx-doi-org-url'/doi."
;; we are going to wait until the url-retrieve is done
(setq *doi-utils-waiting* t)
;; start with no redirect. it will be set in the callback.
(setq *doi-utils-redirect* nil)
(url-retrieve
(format "%s%s" doi-utils-dx-doi-org-url doi)
'doi-utils-redirect-callback)
;; I suspect we need to wait here for the asynchronous process to
;; finish. we loop and sleep until the callback says it is done via
;; `*doi-utils-waiting*'. this works as far as i can tell. Before I
;; had to run this a few times to get it to work, which i suspect
;; just gave the first one enough time to finish.
(while *doi-utils-waiting* (sleep-for 0.1)))
;; Once we have a redirect for a particular doi, we need to compute the url to
;; the pdf. We do this with a series of functions. Each function takes a single
;; argument, the redirect url. If it knows how to compute the pdf url it does,
;; and returns it. We store the functions in a variable:
(defvar doi-utils-pdf-url-functions nil
"Functions that return a url to a pdf from a redirect url.
Each function takes one argument, the redirect url. The function
must return a pdf-url, or nil.")
;;** APS journals
(defun aps-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s*\\):https://journals.aps.org" *doi-utils-redirect*)
(replace-regexp-in-string "/abstract/" "/pdf/" *doi-utils-redirect*)))
;;** Science
(defun science-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://www.sciencemag.org" *doi-utils-redirect*)
(concat *doi-utils-redirect* ".full.pdf")))
;;** Nature
(defun nature-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://www.nature.com" *doi-utils-redirect*)
(concat *doi-utils-redirect* ".pdf")))
;;** Elsevier/ScienceDirect
;; You cannot compute these pdf links; they are embedded in the redirected pages.
(defvar *doi-utils-pdf-url* nil
"Stores url to pdf download from a callback function.")
;;** Wiley
;; Wiley have changed the url structure from
;; http:https://onlinelibrary.wiley.com/doi/10.1002/anie.201402680/abstract
;; http:https://onlinelibrary.wiley.com/doi/10.1002/anie.201402680/pdf
;; to
;; http:https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201402680
;; http:https://onlinelibrary.wiley.com/doi/pdf/10.1002/anie.201402680
;; Hence fewer steps are now required.
;; https://onlinelibrary.wiley.com/doi/10.1002/adts.202200926
;; https://onlinelibrary.wiley.com/doi/epdf/10.1002/adts.202200926
;; (defun wiley-pdf-url (*doi-utils-redirect*)
;; "Get url to the pdf from *DOI-UTILS-REDIRECT*."
;; (when (string-match "^http\\(s?\\):https://onlinelibrary.wiley.com" *doi-utils-redirect*)
;; (replace-regexp-in-string "doi/abs" "doi/pdf" *doi-utils-redirect*)))
(defun wiley-pdf-url-2 (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*.
[2023-04-10 Mon] updated a new rule.
https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/anie.201310461?download=true"
(when (string-match "^http\\(s?\\):https://onlinelibrary.wiley.com" *doi-utils-redirect*)
(concat
(replace-regexp-in-string "doi/" "doi/pdfdirect/" *doi-utils-redirect*)
"?download=true")))
(defun agu-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "https://agupubs.onlinelibrary.wiley.com"
*doi-utils-redirect*)
(replace-regexp-in-string "/full/" "/pdfdirect/" *doi-utils-redirect*)))
;;** Springer
(defun springer-chapter-pdf-url (*doi-utils-redirect*)
(when (string-match "^http\\(s?\\):https://link.springer.com/chapter/" *doi-utils-redirect*)
(replace-regexp-in-string "/chapter" "/content/pdf"
(concat *doi-utils-redirect* ".pdf"))))
(defun springer-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://link.springer.com" *doi-utils-redirect*)
(replace-regexp-in-string "/article/" "/content/pdf/"
(concat *doi-utils-redirect* ".pdf"))))
;;** ACS
;; here is a typical url http:https://pubs.acs.org/doi/abs/10.1021/nl500037x
;; the pdf is found at http:https://pubs.acs.org/doi/pdf/10.1021/nl500037x
;; we just change /abs/ to /pdf/.
(defun acs-pdf-url-1 (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://pubs.acs.org/doi/abs/" *doi-utils-redirect*)
(replace-regexp-in-string "/abs/" "/pdf/" *doi-utils-redirect*)))
;; 1/20/2016 I noticed this new pattern in pdf urls, where there is no abs in
;; the url
(defun acs-pdf-url-2 (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://pubs.acs.org/doi/" *doi-utils-redirect*)
(replace-regexp-in-string "/doi/" "/doi/pdf/" *doi-utils-redirect*)))
;; 1/18/2019: It looks like they are using https now
(defun acs-pdf-url-3 (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^https://pubs.acs.org/doi/" *doi-utils-redirect*)
(replace-regexp-in-string "/doi/" "/doi/pdf/" *doi-utils-redirect*)))
;;** IOP
(defun iop-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://iopscience.iop.org" *doi-utils-redirect*)
(concat *doi-utils-redirect* "/pdf")))
;;** JSTOR
(defun jstor-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://www.jstor.org" *doi-utils-redirect*)
(concat (replace-regexp-in-string "/stable/" "/stable/pdfplus/" *doi-utils-redirect*) ".pdf")))
;;** AIP
(defun aip-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://scitation.aip.org" *doi-utils-redirect*)
;; get stuff after content
(let (p1 p2 s p3)
(setq p2 (replace-regexp-in-string
"^http\\(s?\\):https://scitation.aip.org/" "" *doi-utils-redirect*))
(setq s (split-string p2 "/"))
(setq p1 (mapconcat 'identity (-remove-at-indices '(0 6) s) "/"))
(setq p3 (concat "/" (nth 0 s) (nth 1 s) "/" (nth 2 s) "/" (nth 3 s)))
(format "http:https://scitation.aip.org/deliver/fulltext/%s.pdf?itemId=/%s&mimeType=pdf&containerItemId=%s"
p1 p2 p3))))
(defun aip-pdf-url-2 (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
;; [2021-08-28 Sat] Seems like they changed the link a little?
;; https://aip.scitation.org/doi/10.1063/1.5019667
;; to
;; https://aip.scitation.org/doi/pdf/10.1063/1.5019667
(when (string-match "^http\\(s?\\):https://aip.scitation.org" *doi-utils-redirect*)
(concat "https://aip.scitation.org/doi/pdf" (cl-second (split-string *doi-utils-redirect* "doi")))))
;;** Taylor and Francis
(defun tandfonline-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://www.tandfonline.com" *doi-utils-redirect*)
(replace-regexp-in-string "/abs/\\|/full/" "/pdf/" *doi-utils-redirect*)))
;;** ECS
(defun ecs-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://jes.ecsdl.org" *doi-utils-redirect*)
(replace-regexp-in-string "\.abstract$" ".full.pdf" *doi-utils-redirect*)))
;; http:https://ecst.ecsdl.org/content/25/2/2769
;; http:https://ecst.ecsdl.org/content/25/2/2769.full.pdf
(defun ecst-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://ecst.ecsdl.org" *doi-utils-redirect*)
(concat *doi-utils-redirect* ".full.pdf")))
;;** RSC
(defun rsc-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://pubs.rsc.org" *doi-utils-redirect*)
(let ((url (downcase *doi-utils-redirect*)))
(setq url (replace-regexp-in-string "articlelanding" "articlepdf" url))
url)))
;;** Science Direct
;; https://www.sciencedirect.com/science/article/pii/S001085452200577X?via%3Dihub
;; https://www.sciencedirect.com/science/article/pii/S001085452200577X/pdfft?isDTMRedir=true&download=true
(defun science-direct-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://www.sciencedirect.com" *doi-utils-redirect*)
(replace-string "?via%3Dihub" "/pdfft?isDTMRedir=true&download=true" *doi-utils-redirect*)))
;; (defun doi-utils-get-science-direct-pdf-url (redirect-url)
;; "Science direct hides the pdf url in html. We get it out here.
;; REDIRECT-URL is where the pdf url will be in."
;; (let ((first-url
;; (with-current-buffer (url-retrieve-synchronously redirect-url)
;; (goto-char (point-min))
;; (when (re-search-forward "pdf_url\" content=\"\\([^\"]*\\)\"" nil t)
;; (match-string-no-properties 1)))))
;; (and first-url
;; (with-current-buffer (url-retrieve-synchronously first-url)
;; (goto-char (point-min))
;; (when (re-search-forward "or click <a href=\"\\([^\"]*\\)\">" nil t)
;; (match-string-no-properties 1))))))
;; (defun science-direct-pdf-url (*doi-utils-redirect*)
;; "Get url to the pdf from *DOI-UTILS-REDIRECT*."
;; (when (string-match "^http\\(s?\\):https://www.sciencedirect.com" *doi-utils-redirect*)
;; (doi-utils-get-science-direct-pdf-url *doi-utils-redirect*)))
;; sometimes I get
;; http:https://linkinghub.elsevier.com/retrieve/pii/S0927025609004558
;; which actually redirect to
;; http:https://www.sciencedirect.com/science/article/pii/S0927025609004558
;; https://www.sciencedirect.com/science/article/pii/S001085452200577X?via%3Dihub
;; https://www.sciencedirect.com/science/article/pii/S001085452200577X/pdfft?isDTMRedir=true&download=true
;; (defun linkinghub-elsevier-pdf-url (*doi-utils-redirect*)
;; "Get url to the pdf from *DOI-UTILS-REDIRECT*."
;; (when (string-match
;; "^https://linkinghub.elsevier.com/retrieve" *doi-utils-redirect*)
;; (science-direct-pdf-url
;; (replace-regexp-in-string
;; ;; change URL to science direct and use function to get pdf URL
;; "https://linkinghub.elsevier.com/retrieve"
;; "https://www.sciencedirect.com/science/article"
;; *doi-utils-redirect*))))
;; https://www.sciencedirect.com/science/article/pii/S1385894723014973/pdfft?isDTMRedir=true&download=true
(defun linkinghub-elsevier-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match
"^https://linkinghub.elsevier.com/retrieve" *doi-utils-redirect*)
(concat
(replace-regexp-in-string
;; change URL to science direct and use function to get pdf URL
"https://linkinghub.elsevier.com/retrieve"
"https://www.sciencedirect.com/science/article"
*doi-utils-redirect*)
"/pdfft?isDTMRedir=true")))
;;** PNAS
;; http:https://www.pnas.org/content/early/2014/05/08/1319030111
;; http:https://www.pnas.org/content/early/2014/05/08/1319030111.full.pdf
;; with supporting info
;; http:https://www.pnas.org/content/early/2014/05/08/1319030111.full.pdf+html?with-ds=yes
(defun pnas-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://www.pnas.org" *doi-utils-redirect*)
(concat *doi-utils-redirect* ".full.pdf?with-ds=yes")))
;;** Copernicus Publications
(defvar copernicus-journal-urls '(
"^https://www.adv-geosci.net/"
"^https://www.adv-radio-sci.net/"
"^https://www.adv-sci-res.net/"
"^https://www.adv-stat-clim-meteorol-oceanogr.net/"
"^https://www.ann-geophys.net/"
"^https://www.arch-anim-breed.net/"
"^https://www.astra-proc.net/"
"^https://www.atmos-chem-phys.net/"
"^https://www.atmos-chem-phys-discuss.net/"
"^https://www.atmos-meas-tech.net/"
"^https://www.atmos-meas-tech-discuss.net/"
"^https://www.biogeosciences.net/"
"^https://www.biogeosciences-discuss.net/"
"^https://www.clim-past.net/recent_papers.html"
"^https://www.clim-past-discuss.net/"
"^https://www.drink-water-eng-sci.net/"
"^https://www.drink-water-eng-sci-discuss.net/"
"^https://www.eg-quaternary-sci-j.net/"
"^https://www.earth-surf-dynam.net/"
"^https://www.earth-surf-dynam-discuss.net/"
"^https://www.earth-syst-dynam.net/"
"^https://www.earth-syst-dynam-discuss.net/"
"^https://www.earth-syst-sci-data.net/"
"^https://www.earth-syst-sci-data-discuss.net/"
"^https://www.foss-rec.net/"
"^https://www.geogr-helv.net/"
"^https://www.geosci-instrum-method-data-syst.net/"
"^https://www.geosci-instrum-method-data-syst-discuss.net/"
"^https://www.geosci-model-dev.net/"
"^https://www.geosci-model-dev-discuss.net/"
"^https://www.hist-geo-space-sci.net/"
"^https://www.hydrol-earth-syst-sci.net/"
"^https://www.hydrol-earth-syst-sci-discuss.net/"
"^https://www.j-sens-sens-syst.net/"
"^https://www.mech-sci.net/"
"^https://www.nat-hazards-earth-syst-sci.net/"
"^https://www.nonlin-processes-geophys-discuss.net/"
"^https://www.ocean-sci.net/"
"^https://www.ocean-sci-discuss.net/"
"^https://www.primate-biol.net/"
"^https://www.proc-iahs.net/"
"^https://www.sci-dril.net/"
"^https://www.soil-journal.net/"
"^https://www.soil-discuss.net/"
"^https://www.solid-earth.net/"
"^https://www.solid-earth-discuss.net/"
"^https://www.stephan-mueller-spec-publ-ser.net/"
"^https://www.the-cryosphere.net/"
"^https://www.the-cryosphere-discuss.net/"
"^https://www.web-ecol.net/"
"^https://www.wind-energ-sci.net/"
"^https://www.wind-energ-sci-discuss.net/"
)
"List of Copernicus URLs.")
(defun doi-utils-get-copernicus-pdf-url (redirect-url)
"Copernicus hides the pdf url in html. We get it out here.
REDIRECT-URL is where the pdf url will be in."
(setq *doi-utils-waiting* t)
(url-retrieve
redirect-url
(lambda (status)
(goto-char (point-min))
(re-search-forward "citation_pdf_url\" content=\"\\([^\"]*\\)\"" nil t)
(setq *doi-utils-pdf-url* (match-string 1)
*doi-utils-waiting* nil)))
(while *doi-utils-waiting* (sleep-for 0.1))
*doi-utils-pdf-url*)
(defun copernicus-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(car (cl-loop for copurl in copernicus-journal-urls
when (string-match copurl *doi-utils-redirect*)
collect
(progn (doi-utils-get-copernicus-pdf-url *doi-utils-redirect*)
*doi-utils-pdf-url*))))
;;** Sage
(defun sage-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://pss.sagepub.com" *doi-utils-redirect*)
(concat *doi-utils-redirect* ".full.pdf")))
;;** Journal of Neuroscience
(defun jneurosci-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://www.jneurosci.org" *doi-utils-redirect*)
(concat *doi-utils-redirect* ".full.pdf")))
;;** Generic .full.pdf
(defun generic-full-pdf-url (*doi-utils-redirect*)
(let ((pdf (concat *doi-utils-redirect* ".full.pdf")))
(when (url-http-file-exists-p pdf)
pdf)))
;;** IEEE
;; 10.1109/re.2014.6912247
;; http(s):https://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6912247
;; http(s):https://ieeexplore.ieee.org/ielx7/6903646/6912234/06912247.pdf
;; http(s):https://ieeexplore.ieee.org/iel7/6903646/6912234/06912247.pdf?arnumber=6912247
;; <meta name="citation_pdf_url" content="http(s):https://ieeexplore.ieee.org/iel7/6903646/6912234/06912247.pdf?arnumber=6912247">
;; <frame src="http(s):https://ieeexplore.ieee.org/ielx7/6903646/6912234/06912247.pdf?tp=&arnumber=6912247&isnumber=6912234" frameborder=0 />
(defun ieee-pdf-url (*doi-utils-redirect*)
"Get a url to the pdf from *DOI-UTILS-REDIRECT* for IEEE urls."
(when (string-match "^https?:https://ieeexplore.ieee.org" *doi-utils-redirect*)
(with-current-buffer (url-retrieve-synchronously *doi-utils-redirect*)
(goto-char (point-min))
(when (re-search-forward "<meta name=\"citation_pdf_url\" content=\"\\([[:ascii:]]*?\\)\">" nil t)
(let ((framed-url (match-string 1)))
(with-current-buffer (url-retrieve-synchronously framed-url)
(goto-char (point-min))
(when (re-search-forward "<frame src=\"\\(http[[:ascii:]]*?\\)\"" nil t)
(match-string 1))))))))
;; At least some IEEE papers need the following new pdf-link parsing
;; Example: 10.1109/35.667413
(defun ieee2-pdf-url (*doi-utils-redirect*)
"Get a url to the pdf from *DOI-UTILS-REDIRECT* for IEEE urls."
(when (string-match "^https?:https://ieeexplore.ieee.org" *doi-utils-redirect*)
(with-current-buffer (url-retrieve-synchronously *doi-utils-redirect*)
(goto-char (point-min))
(when (re-search-forward "\"pdfUrl\":\"\\([[:ascii:]]*?\\)\"" nil t)
(let ((framed-url (match-string 1)))
(with-current-buffer (url-retrieve-synchronously (concat "http:https://ieeexplore.ieee.org" framed-url))
(goto-char (point-min))
(when (re-search-forward "<frame src=\"\\(http[[:ascii:]]*?\\)\"" nil t)
(match-string 1))))))))
;; Another try to get the ieee pdf
;; <iframe src="http(s):https://ieeexplore.ieee.org/ielx5/8/4538127/04538164.pdf?tp=&arnumber=4538164&isnumber=4538127" frameborder=0>
(defun ieee3-pdf-url (*doi-utils-redirect*)
"Get a url to the pdf from *DOI-UTILS-REDIRECT* for IEEE urls."
(when (string-match "^https?:https://ieeexplore.ieee.org" *doi-utils-redirect*)
(with-current-buffer (url-retrieve-synchronously *doi-utils-redirect*)
(goto-char (point-min))
(when (re-search-forward "\"pdfUrl\":\"\\([[:ascii:]]*?\\)\"" nil t)
(let ((framed-url (match-string 1)))
(with-current-buffer (url-retrieve-synchronously (concat "http:https://ieeexplore.ieee.org" framed-url))
(goto-char (point-min))
(when (re-search-forward "<iframe src=\"\\(http[[:ascii:]]*?\\)\"" nil t)
(match-string 1))))))))
;; ACM Digital Library
;; https://dl.acm.org/doi/10.1145/1368088.1368132
(defun acm-pdf-url (*doi-utils-redirect*)
"Get a url to the pdf from *DOI-UTILS-REDIRECT* for ACM urls."
(when (string-match "^https?:https://dl.acm.org" *doi-utils-redirect*)
(replace-regexp-in-string "doi" "doi/pdf" *doi-utils-redirect* )))
;;** Optical Society of America (OSA)
(defun osa-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^https://www.osapublishing.org" *doi-utils-redirect*)
(replace-regexp-in-string "abstract.cfm" "viewmedia.cfm" *doi-utils-redirect* )))
;;** Publishers using Highwire Press metatags
;; For context and details, see:
;; https://webmasters.stackexchange.com/questions/72746/where-are-the-complete-set-of-highwire-press-metatags-defined
(defun highwire-pdf-url (*doi-utils-redirect*)
"Typical URL: http:https://biomechanical.asmedigitalcollection.asme.org/article.aspx?articleid=1427237
On this page the pdf might be here: <meta name=\"citation_author\" content=\"Dalong Li\" /><meta name=\"citation_author_email\" content=\"[email protected]\" /><meta name=\"citation_author\" content=\"Anne M. Robertson\" /><meta name=\"citation_author_email\" content=\"[email protected]\" /><meta name=\"citation_title\" content=\"A Structural Multi-Mechanism Damage Model for Cerebral Arterial Tissue\" /><meta name=\"citation_firstpage\" content=\"101013\" /><meta name=\"citation_doi\" content=\"10.1115/1.3202559\" /><meta name=\"citation_keyword\" content=\"Mechanisms\" /><meta name=\"citation_keyword\" content=\"Biological tissues\" /><meta name=\"citation_keyword\" content=\"Stress\" /><meta name=\"citation_keyword\" content=\"Fibers\" /><meta name=\"citation_journal_title\" content=\"Journal of Biomechanical Engineering\" /><meta name=\"citation_journal_abbrev\" content=\"J Biomech Eng\" /><meta name=\"citation_volume\" content=\"131\" /><meta name=\"citation_issue\" content=\"10\" /><meta name=\"citation_publication_date\" content=\"2009/10/01\" /><meta name=\"citation_issn\" content=\"0148-0731\" /><meta name=\"citation_publisher\" content=\"American Society of Mechanical Engineers\" /><meta name=\"citation_pdf_url\" content=\"http:https://biomechanical.asmedigitalcollection.asme.org/data/journals/jbendy/27048/101013_1.pdf\" />
It is in the citation_pdf_url.
It would be better to parse this, but here I just use a regexp.
"
(when (or (string-match "^http\\(s?\\):https://biomechanical.asmedigitalcollection.asme.org" *doi-utils-redirect*)
(string-match "^http\\(s?\\):https://ojs.aaai.org" *doi-utils-redirect*)
(string-match "^http\\(s?\\):https://aclanthology.org" *doi-utils-redirect*))
(setq *doi-utils-waiting* 0)
(url-retrieve
*doi-utils-redirect*
(lambda (status)
(or (progn (goto-char (point-min))
(re-search-forward "citation_pdf_url\"? content=\"\\(.*\\)\"" nil t))
(progn (goto-char (point-min))
(re-search-forward "\"\\([^\"]*\\)\" name=\"?citation_pdf_url" nil t)))
;; (message-box (match-string 1))
(setq *doi-utils-pdf-url* (match-string 1)
*doi-utils-waiting* nil)))
(while (and *doi-utils-waiting* (< *doi-utils-waiting* 5))
(setq *doi-utils-waiting* (+ *doi-utils-waiting* 0.1))
(sleep-for 0.1))
*doi-utils-pdf-url*))
;; Society for Industrial and Applied Mathematics (SIAM)
(defun siam-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s?\\):https://epubs.siam.org" *doi-utils-redirect*)
(replace-regexp-in-string "/doi/" "/doi/pdf/" *doi-utils-redirect* )))
;; PLOS journals
;; https://plos.org/
(defun plos-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^http\\(s*\\):https://journals.plos.org" *doi-utils-redirect*)
(concat (replace-regexp-in-string (regexp-quote "/article?id=") "/article/file?id=" *doi-utils-redirect*) "&type=printable")))
;; https://www.frontiersin.org/articles/10.3389/fchem.2022.1037997/full
;; https://www.frontiersin.org/articles/10.3389/fchem.2022.1037997/pdf
(defun frontiers-pdf-url (*doi-utils-redirect*)
(when (string-match "^http\\(s*\\):https://www.frontiersin.org" *doi-utils-redirect*)
(replace-regexp-in-string "/full" "/pdf" *doi-utils-redirect*)))
;; https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/celc.201902035
;; https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/celc.201902035
(defun chemistry-europe-pdf-url (*doi-utils-redirect*)
(when (string-match "^http\\(s*\\):https://chemistry-europe.onlinelibrary.wiley.com" *doi-utils-redirect*)
(concat
(replace-regexp-in-string "/doi" "/doi/pdfdirect" *doi-utils-redirect*)
"?download=true")))
;; ** from issue #1081
(defun arxiv-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match-p "^https?:https://arxiv\\.org" *doi-utils-redirect*)
(concat (replace-regexp-in-string "/abs/" "/pdf/" *doi-utils-redirect*)
".pdf")))
(defun rss-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match-p "roboticsproceedings" *doi-utils-redirect*)
(concat (replace-regexp-in-string "\\.html" ".pdf" *doi-utils-redirect*))))
(defun ieeestamp-pdf-url (*doi-utils-redirect*)
"Get url to the pdf from *DOI-UTILS-REDIRECT*."
(when (string-match "^https?:https://ieeexplore\\.ieee\\.org/document/\\([0-9]+\\)"
*doi-utils-redirect*)
(concat "https://ieeexplore.ieee.org/stampPDF/getPDF.jsp?tp=&arnumber="
(match-string 1 *doi-utils-redirect*))))
;;** Add all functions
(setq doi-utils-pdf-url-functions
(list
'aps-pdf-url
'science-pdf-url
'nature-pdf-url
;; 'wiley-pdf-url
'wiley-pdf-url-2
'springer-chapter-pdf-url
'springer-pdf-url
'acs-pdf-url-1
'acs-pdf-url-2
'acs-pdf-url-3
'iop-pdf-url
'jstor-pdf-url
'aip-pdf-url
'aip-pdf-url-2
'science-direct-pdf-url
'linkinghub-elsevier-pdf-url
'tandfonline-pdf-url
'ecs-pdf-url
'ecst-pdf-url
'rsc-pdf-url
'pnas-pdf-url
'copernicus-pdf-url
'sage-pdf-url
'jneurosci-pdf-url
'ieee-pdf-url
'ieee2-pdf-url
'ieee3-pdf-url
'acm-pdf-url
'osa-pdf-url
'highwire-pdf-url
'siam-pdf-url
'agu-pdf-url
'plos-pdf-url
'frontiers-pdf-url
'chemistry-europe-pdf-url
'generic-full-pdf-url
'arxiv-pdf-url
'rss-pdf-url
'ieeestamp-pdf-url))
;;** Get the pdf url for a doi
(defun doi-utils-get-pdf-url (doi)
"Return a url to a pdf for the DOI if one can be calculated.
Loops through the functions in `doi-utils-pdf-url-functions'
until one is found."
(doi-utils-get-redirect doi)
(unless *doi-utils-redirect*
(error "No redirect found for %s" doi))
(catch 'pdf-url
(dolist (func doi-utils-pdf-url-functions)
(let ((this-pdf-url (funcall func *doi-utils-redirect*)))
(when this-pdf-url
(throw 'pdf-url this-pdf-url))))))
;;** Finally, download the pdf
(defvar bibtex-completion-library-path)
(defvar bibtex-completion-bibliography)
(declare-function async-start "async")
;;;###autoload
(defun doi-utils-async-download-pdf ()
"Download the PDF for bibtex entry at point asynchronously.
It is not fully async, only the download is. Fully async is
harder because you need to run `doi-utils-get-pdf-url' async
too. "
(interactive)
(require 'async)
(save-excursion
(bibtex-beginning-of-entry)
(let (;; get doi, removing http:https://dx.doi.org/ if it is there.
(doi (replace-regexp-in-string
"https?:https://\\(dx.\\)?.doi.org/" ""
(bibtex-autokey-get-field "doi")))
(key (cdr (assoc "=key=" (bibtex-parse-entry))))
(pdf-url)
(pdf-file))
(setq pdf-file
(concat (cond
((stringp bibtex-completion-library-path)
bibtex-completion-library-path)
((= 1 (length bibtex-completion-library-path))
(car bibtex-completion-library-path))
(t
(completing-read "Dir: " bibtex-completion-library-path)))
key ".pdf"))
(unless doi (error "No DOI found to get a pdf for"))
(when (file-exists-p pdf-file)
(error "%s already exists. Delete to re-download" pdf-file))
;; (doi-utils-get-pdf-url "10.1063/1.5019667")
;; If you get here, try getting the pdf file
(async-start
`(lambda ()
(setq package-user-dir ,package-user-dir)
(require 'package)
(package-initialize)
(setq load-path (list ,@load-path))
(require 'doi-utils)
(setq pdf-url (doi-utils-get-pdf-url ,doi))
(when pdf-url
(url-copy-file pdf-url ,pdf-file t)
(let* ((header (with-temp-buffer
(set-buffer-multibyte nil)
(insert-file-contents-literally ,pdf-file nil 0 5)
(buffer-string)))
(valid (and (stringp header)
(string-equal (encode-coding-string header 'utf-8) "%PDF-"))))
(if valid
(format "%s downloaded" ,pdf-file)
(delete-file ,pdf-file)
(require 'browse-url)
(browse-url pdf-url)
(message "Invalid pdf (file deleted). Header = %s" header)))))
`(lambda (result)
(message "doi-utils-async-download-pdf: %s" result))))))
;;;###autoload
(defun doi-utils-get-bibtex-entry-pdf (&optional arg)
"Download pdf for entry at point if the pdf does not already exist locally.
The entry must have a doi. The pdf will be saved, by the name
%s.pdf where %s is the bibtex label. Files will not be
overwritten. The pdf will be checked to make sure it is a pdf,
and not some html failure page. You must have permission to
access the pdf. We open the pdf at the end if
`doi-utils-open-pdf-after-download' is non-nil.
With one prefix ARG, directly get the pdf from a file (through
`read-file-name') instead of looking up a DOI. With a double
prefix ARG, directly get the pdf from an open buffer (through
`read-buffer-to-switch') instead. These two alternative methods
work even if the entry has no DOI, and the pdf file is not
checked."
(interactive "P")
(save-excursion
(bibtex-beginning-of-entry)
(let (;; get doi, removing http:https://dx.doi.org/ if it is there.
(doi (replace-regexp-in-string
"https?:https://\\(dx.\\)?.doi.org/" ""
(bibtex-autokey-get-field "doi")))
(key (cdr (assoc "=key=" (bibtex-parse-entry))))
(pdf-url)
(pdf-file))
(setq pdf-file
(concat (cond
((stringp bibtex-completion-library-path)
bibtex-completion-library-path)
((= 1 (length bibtex-completion-library-path))
(car bibtex-completion-library-path))
(t
(completing-read "Dir: " bibtex-completion-library-path)))
key ".pdf"))
;; now get file if needed.
(unless (file-exists-p pdf-file)
(cond
((and (not arg)
doi
(setq pdf-url (doi-utils-get-pdf-url doi)))
(url-copy-file pdf-url pdf-file)
;; now check if we got a pdf
(if (org-ref-pdf-p pdf-file)
(message "%s saved" pdf-file)
(delete-file pdf-file)
(message "No pdf was downloaded.")
(browse-url pdf-url)))
((equal arg '(4))
(copy-file (expand-file-name (read-file-name "Pdf file: " nil nil t))
pdf-file))
((equal arg '(16))
(with-current-buffer (read-buffer-to-switch "Pdf buffer: ")
(write-file pdf-file)))
(t
(message "We don't have a recipe for this journal.")))
(when (file-exists-p pdf-file)
(bibtex-set-field "file" pdf-file))
(when (and doi-utils-open-pdf-after-download (file-exists-p pdf-file))
(org-open-file pdf-file))))))
;;* Getting bibtex entries from a DOI
;; [[http:https://homepages.see.leeds.ac.uk/~eeaol/notes/2013/02/doi-metadata/][found]]
;; you can download metadata about a DOI from http:https://dx.doi.org. You just have
;; to construct the right http request to get it. Here is a function that gets
;; the metadata as a plist in emacs.
;;
;;
(defvar doi-utils-cache nil
"Cache variable for storing data we can reuse.
A-list (doi . data) where doi is doi string, and data is what is
retrieved from it. This is transient, and disappears when you
restart Emacs. This mostly exists to prevent
`doi-utils-update-field' from needing to download the data for
every field.")
(defun doi-utils-clear-cache ()
"Clear `doi-utils-cache'."
(interactive)
(setq doi-utils-cache '()))
(defun doi-utils-get-json-metadata (doi)
"Try to get json metadata for DOI. Open the DOI in a browser if we do not get it."
(if-let ((data (cdr (assoc doi doi-utils-cache))))
;; We have the data already, so we return it.
data
(let ((url-request-method "GET")
(url-mime-accept-string "application/citeproc+json")
(json-object-type 'plist)
(json-data)
(url (concat doi-utils-dx-doi-org-url doi)))
(with-temp-buffer
(url-insert
(url-retrieve-synchronously url))
(setq json-data (buffer-string))
(when (or (string-match "<title>Error: DOI Not Found</title>" json-data)
(string-match "Resource not found" json-data)
(string-match "Status *406" json-data)
(string-match "400 Bad Request" json-data))
(browse-url (concat doi-utils-dx-doi-org-url doi))
(error "Something went wrong. We got this response:
%s
Opening %s" json-data url))
(setq data (json-read-from-string json-data))
(cl-pushnew (cons doi data) doi-utils-cache)
data))))
(defun doi-utils-get-json-metadata-curl (doi)
"Try to get json metadata for DOI. Open the DOI in a browser if we do not get it."
(let ((json-object-type 'plist)
(json-data)
(url (concat doi-utils-dx-doi-org-url doi)))
(with-temp-buffer
(call-process "curl" nil t nil
"--location"
"--silent"
"--header"
"Accept: application/citeproc+json"
url)
(setq json-data (buffer-string))
(cond
((or (string-match "<title>Error: DOI Not Found</title>" json-data)
(string-match "Resource not found" json-data)
(string-match "Status *406" json-data)
(string-match "400 Bad Request" json-data))
(browse-url url)
(error "Something went wrong. We got this response:
%s
Opening %s" json-data url))
;; everything seems ok with the data
(t
(json-read-from-string json-data))))))
;; We can use that data to construct a bibtex entry. We do that by defining a
;; template, and filling it in. I wrote this template expansion code which
;; makes it easy to substitute values like %{} in emacs lisp.
(defun doi-utils-expand-template (s)
"Expand a string template S containing %{} with the eval of its contents."
(replace-regexp-in-string "%{\\([^}]+\\)}"
(lambda (arg)
(let ((sexp (substring arg 2 -1)))
(format "%s" (eval (read sexp)))))
s))
;; Now we define a function that fills in that template from the metadata.
;; As different bibtex types share common keys, it is advantageous to separate
;; data extraction from json, and the formatting of the bibtex entry.
;; We use eval-and-compile because we use the three following forms in the
;; `doi-utils-def-bibtex-type' macro. Since the macro is expanded at compile
;; time, we need to ensure these defuns and defvars are evaluated at
;; compile-time.
(eval-and-compile
(defvar doi-utils-json-metadata-extract
'((type (plist-get results :type))
(author (mapconcat (lambda (x)
(message "%s" x)
(if (plist-get x :name)
(plist-get x :name)
(concat (plist-get x :given) " " (plist-get x :family))))
(plist-get results :author) " and "))
(title (plist-get results :title))
(subtitle (plist-get results :subtitle))
(journal (plist-get results :container-title))
(series (plist-get results :container-title))
(publisher (plist-get results :publisher))
(volume (plist-get results :volume))
(issue (plist-get results :issue))
(number (plist-get results :issue))
(year (or (elt (elt (plist-get (plist-get results :issued) :date-parts) 0) 0)
(elt (elt (plist-get (plist-get results :approved) :date-parts) 0) 0)
))