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Download pdfs from Scihub.

Project description

SciDownl

An unofficial api for downloading papers from SciHub.

  • Support downloading with DOI or PMID.
  • Easy to update newst SciHub domains.

Quick Usage

# Download with a DOI and filenmae is the paper's title.
$ scidownl download --doi https://doi.org/10.1145/3375633

# Download with a PMID and a user-defined filepath
$ scidownl download --pmid 31395057 --out ./paper/paper-1.pdf

Installation

Install with pip

Scidownl could be easily install with pip.

$ pip3 install -U scidownl

Install from source code

$ git clone https://github.com/Tishacy/SciDownl.git
$ cd Scidownl && python3 setup.py install

Usage

Command line tool

$ scidownl -h
Usage: scidownl [OPTIONS] COMMAND [ARGS]...

  Command line tool to download pdfs from Scihub.

Options:
  -h, --help  Show this message and exit.

Commands:
  config         Get global configs.
  domain.list    List available SciHub domains in local db.
  domain.update  Update available SciHub domains and save them to local db.
  download       Download paper(s) by DOI or PMID.

1. Update available SciHub domains

$ scidownl domain.update --help
Usage: scidownl domain.update [OPTIONS]

  Update available SciHub domains and save them to local db.

Options:
  -m, --mode TEXT  update mode, could be 'crawl' or 'search', default mode is
                   'crawl'.
  -h, --help       Show this message and exit.

There are 2 update modes that you could specify with an option: -m or --mode

  • crawl: [Default] Crawling the real-time updated SciHub domains website (aka, SciHub domain source) to get available SciHub domains. The SciHub domain source website url is configured in the global config file in the section [scihub.domain.updater.crawl] with the key of scihub_domain_source. You could use scidownl config --location to show the location of the global config file and edit it.

    ; Global config file: global.ini
    ; ...
    [scihub.domain.updater.crawl]
    scihub_domain_source = http://tool.yovisun.com/scihub
    ; ...
    

    An example of using crawl mode:

    $ scidownl domain.update --mode crawl
    [INFO] | 2022/03/07 21:07:50 | Found 6 valid SciHub domains in total: ['http://sci-hub.ru', 'http://sci-hub.se', 'https://sci-hub.ru', 'https://sci-hub.st', 'http://sci-hub.st', 'https://sci-hub.se']
    [INFO] | 2022/03/07 21:07:50 | Saved 6 SciHub domains to local db.
    
  • search:Generate combinations according to the rules of SciHub domains and search for available SciHub domains. This will take longer than crawl mode.

    An example of using search mode:

    $ scidownl domain.update --mode search
    [INFO] | 2022/03/07 21:08:44 | # Search valid SciHub domains from 1352 urls
    [INFO] | 2022/03/07 21:08:48 | # Found a SciHub domain url: https://sci-hub.ru
    [INFO] | 2022/03/07 21:08:48 | # Found a SciHub domain url: https://sci-hub.st
    ...
    [INFO] | 2022/03/07 21:09:04 | Found 6 valid SciHub domains in total: ['https://sci-hub.ru', 'https://sci-hub.st', ...]
    [INFO] | 2022/03/07 21:09:04 | Saved 6 SciHub domains to local db.
    

2. List all saved SciHub domains

SciDownl use SQLite as the local database to store all updated SciHub domains locally. You can list all saved SciHub domains with the command domain.list.

$ scidownl domain.list
+--------------------+----------------+---------------+
| Url                |   SuccessTimes |   FailedTimes |
|--------------------+----------------+---------------|
| http://sci-hub.ru  |              0 |             0 |
| https://sci-hub.ru |              0 |             0 |
| https://sci-hub.st |              0 |             0 |
| http://sci-hub.st  |              0 |             0 |
| https://sci-hub.se |              0 |             0 |
| http://sci-hub.se  |              0 |             0 |
+--------------------+----------------+---------------+

In addition to the easy-to-understand Url column, the SuccessTimes column is used to record the number of successful paper downloads using this Url, and the FailedTimes column is used to record the number of failed paper downloads using this Url. These two columns are used to calculate the priority of choosing a SciHub domain when downloading papers.

3. Download papers

$ scidownl download --help
Usage: scidownl download [OPTIONS]

  Download paper(s) by DOI or PMID.

Options:
  -d, --doi TEXT         DOI string. Specifying multiple DOIs is supported,
                         e.g., --doi FIRST_DOI --doi SECOND_DOI ...
  -p, --pmid INTEGER     PMID numbers. Specifying multiple PMIDs is supported,
                         e.g., --pmid FIRST_PMID --pmid SECOND_PMID ...
  -o, --out TEXT         Output directory or file path, which could be an
                         absolute path or a relative path. Output directory
                         examples: /absolute/path/to/download/,
                         ./relative/path/to/download/, Output file examples:
                         /absolute/dir/paper.pdf, ../relative/dir/paper.pdf.
                         If --out is not specified, paper will be downloaded
                         to the current directory with the file name of the
                         paper's title. If multiple DOIs or multiple PMIDs are
                         provided, the --out option is always considered as
                         the output directory, rather than the output file
                         path.
  -u, --scihub-url TEXT  Scihub domain url. If not specified, automatically
                         choose one from local saved domains. It's recommended
                         to leave this option empty.
  -h, --help             Show this message and exit.

Download papers with DOI(s) or PMID(s)

Using option -d or --doi to download papers with DOI, and option -p or --pmid to download papers with PMID. You can specify these options for multiple times, and even mix of them.

# with a single DOI
$ scidownl download --doi https://doi.org/10.1145/3375633

# with multiple DOIs
$ scidownl download --doi https://doi.org/10.1145/3375633 --doi https://doi.org/10.1145/2785956.2787496

# with a single PMID
$ scidownl download --pmid 31395057

# with multiple PMIDs
$ scidownl download --pmid 31395057 --pmid 24686414

# with a mix of DOIs and PMIDs
$ scidownl download --doi https://doi.org/10.1145/3375633 --pmid 31395057 --pmid 24686414

Customize the output location of papers

By default, the downloaded paper is named by the paper's title. With option -o or --out,you can customize the output location of downloaded papers, whcih could be an absolute path or a relative path, and a direcotry or a file path.

  • Output the paepr to a directory:

    $ scidownl download --pmid 31395057 --out /absolute/path/of/a/directory/
    # NOTE that the '/' at the end of the directory path is required, otherwise the last segment will be treated as the filename rather than a directory.
    
    $ scidownl download --pmid 31395057 --out ../relative/path/of/a/directory/
    # The '/' at the end of the directory path is required too.
    
  • Output the paper with the file path.

    $ scidownl download --pmid 31395057 --out /absolute/dir/paper.pdf
    $ scidownl download --pmid 31395057 --out ../relative/dir/paper.pdf
    $ scidownl download --pmid 31395057 --out relative/dir/paper.pdf
    $ scidownl download --pmid 31395057 --out paper  # will be downlaoded as ./paper.pdf
    

NOTE that if there are more than one papers to be downloaded, the value of the --out option will always be considered as a directory, rather than a file path.

$ scidownl download --pmid 31395057 --pmid 24686414 --out paper
# will be downloaded to ./paper/ directory:
#  ./paper/<paper-title-1>.pdf
#  ./paper/<paper-title-2>.pdf

If some directories in the option are not exist, SciDownl will create them for you :smile:.

Use a specific SciHub url

With option -u or --scihub-url, you could use a specific SciHub url you want, rather than let SciDownl automatically choose one for you from local saved SciHub domains. It's recommended to let SciDownl choose a SciHub url, so you don't need to use this option in normal use.

$ scidownl download --pmid 31395057 --scihub-url http://sci-hub.se

Module use

You could use scihub_download function to download papers.

from scidownl import scihub_download

paper = "https://doi.org/10.1145/3375633"
paper_type = "doi"
out = "./paper/one_paper.pdf"
scihub_download(paper, paper_type=paper_type, out=out)

More examples could be seen in examples.

LICENSE

Copyright (c) 2022 tishacy.

Licensed under the MIT License.

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