├── .dockerignore ├── .gitignore ├── Dockerfile ├── LICENSE ├── README.md ├── requirements.txt ├── scraper ├── __init__.py ├── items.py ├── middlewares.py ├── pipelines.py ├── settings.py └── spiders │ ├── __init__.py │ └── learncpp.py └── scrapy.cfg /.dockerignore: -------------------------------------------------------------------------------- 1 | venv 2 | .gitignore 3 | LICENSE 4 | README.md 5 | Dockerfile 6 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | ### Python ### 2 | # Byte-compiled / optimized / DLL files 3 | __pycache__/ 4 | *.py[cod] 5 | *$py.class 6 | 7 | # C extensions 8 | *.so 9 | 10 | # Distribution / packaging 11 | .Python 12 | build/ 13 | develop-eggs/ 14 | dist/ 15 | downloads/ 16 | eggs/ 17 | .eggs/ 18 | lib/ 19 | lib64/ 20 | parts/ 21 | sdist/ 22 | var/ 23 | wheels/ 24 | share/python-wheels/ 25 | *.egg-info/ 26 | .installed.cfg 27 | *.egg 28 | MANIFEST 29 | 30 | # PyInstaller 31 | # Usually these files are written by a python script from a template 32 | # before PyInstaller builds the exe, so as to inject date/other infos into it. 33 | *.manifest 34 | *.spec 35 | 36 | # Installer logs 37 | pip-log.txt 38 | pip-delete-this-directory.txt 39 | 40 | # Unit test / coverage reports 41 | htmlcov/ 42 | .tox/ 43 | .nox/ 44 | .coverage 45 | .coverage.* 46 | .cache 47 | nosetests.xml 48 | coverage.xml 49 | *.cover 50 | *.py,cover 51 | .hypothesis/ 52 | .pytest_cache/ 53 | cover/ 54 | 55 | # Translations 56 | *.mo 57 | *.pot 58 | 59 | # Django stuff: 60 | *.log 61 | local_settings.py 62 | db.sqlite3 63 | db.sqlite3-journal 64 | 65 | # Flask stuff: 66 | instance/ 67 | .webassets-cache 68 | 69 | # Scrapy stuff: 70 | .scrapy 71 | 72 | # Sphinx documentation 73 | docs/_build/ 74 | 75 | # PyBuilder 76 | .pybuilder/ 77 | target/ 78 | 79 | # Jupyter Notebook 80 | .ipynb_checkpoints 81 | 82 | # IPython 83 | profile_default/ 84 | ipython_config.py 85 | 86 | # pyenv 87 | # For a library or package, you might want to ignore these files since the code is 88 | # intended to run in multiple environments; otherwise, check them in: 89 | # .python-version 90 | 91 | # pipenv 92 | # According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control. 93 | # However, in case of collaboration, if having platform-specific dependencies or dependencies 94 | # having no cross-platform support, pipenv may install dependencies that don't work, or not 95 | # install all needed dependencies. 96 | #Pipfile.lock 97 | 98 | # poetry 99 | # Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control. 100 | # This is especially recommended for binary packages to ensure reproducibility, and is more 101 | # commonly ignored for libraries. 102 | # https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control 103 | #poetry.lock 104 | 105 | # pdm 106 | # Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control. 107 | #pdm.lock 108 | # pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it 109 | # in version control. 110 | # https://pdm.fming.dev/#use-with-ide 111 | .pdm.toml 112 | 113 | # PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm 114 | __pypackages__/ 115 | 116 | # Celery stuff 117 | celerybeat-schedule 118 | celerybeat.pid 119 | 120 | # SageMath parsed files 121 | *.sage.py 122 | 123 | # Environments 124 | .env 125 | .venv 126 | env/ 127 | venv/ 128 | ENV/ 129 | env.bak/ 130 | venv.bak/ 131 | 132 | # Spyder project settings 133 | .spyderproject 134 | .spyproject 135 | 136 | # Rope project settings 137 | .ropeproject 138 | 139 | # mkdocs documentation 140 | /site 141 | 142 | # mypy 143 | .mypy_cache/ 144 | .dmypy.json 145 | dmypy.json 146 | 147 | # Pyre type checker 148 | .pyre/ 149 | 150 | # pytype static type analyzer 151 | .pytype/ 152 | 153 | # Cython debug symbols 154 | cython_debug/ 155 | 156 | # PyCharm 157 | # JetBrains specific template is maintained in a separate JetBrains.gitignore that can 158 | # be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore 159 | # and can be added to the global gitignore or merged into this file. For a more nuclear 160 | # option (not recommended) you can uncomment the following to ignore the entire idea folder. 161 | #.idea/ 162 | 163 | ### Python Patch ### 164 | # Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration 165 | poetry.toml 166 | 167 | # ruff 168 | .ruff_cache/ 169 | 170 | # LSP config files 171 | pyrightconfig.json 172 | 173 | # Downloaded files 174 | learncpp/ 175 | -------------------------------------------------------------------------------- /Dockerfile: -------------------------------------------------------------------------------- 1 | FROM ubuntu:jammy 2 | 3 | WORKDIR /app 4 | 5 | COPY requirements.txt requirements.txt 6 | 7 | COPY . . 8 | 9 | RUN set -ex \ 10 | && apt-get -y update \ 11 | && apt-get install --no-install-recommends --no-install-suggests -y \ 12 | python3 python3-pip wkhtmltopdf \ 13 | && pip3 install -r requirements.txt 14 | 15 | RUN mkdir -p /run/user/1000 && chown -R 0:0 /run/user/1000 16 | RUN chmod 0700 /run/user/1000 17 | 18 | CMD ["sh", "-c", "export XDG_RUNTIME_DIR=/run/user/1000 && scrapy crawl learncpp"] 19 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU AFFERO GENERAL PUBLIC LICENSE 2 | Version 3, 19 November 2007 3 | 4 | Copyright (C) 2024 Amal Rajan 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU Affero General Public License is a free, copyleft license for 11 | software and other kinds of works, specifically designed to ensure 12 | cooperation with the community in the case of network server software. 13 | 14 | The licenses for most software and other practical works are designed 15 | to take away your freedom to share and change the works. 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Remote Network Interaction; Use with the GNU General Public License. 541 | 542 | Notwithstanding any other provision of this License, if you modify the 543 | Program, your modified version must prominently offer all users 544 | interacting with it remotely through a computer network (if your version 545 | supports such interaction) an opportunity to receive the Corresponding 546 | Source of your version by providing access to the Corresponding Source 547 | from a network server at no charge, through some standard or customary 548 | means of facilitating copying of software. This Corresponding Source 549 | shall include the Corresponding Source for any work covered by version 3 550 | of the GNU General Public License that is incorporated pursuant to the 551 | following paragraph. 552 | 553 | Notwithstanding any other provision of this License, you have 554 | permission to link or combine any covered work with a work licensed 555 | under version 3 of the GNU General Public License into a single 556 | combined work, and to convey the resulting work. The terms of this 557 | License will continue to apply to the part which is the covered work, 558 | but the work with which it is combined will remain governed by version 559 | 3 of the GNU General Public License. 560 | 561 | 14. Revised Versions of this License. 562 | 563 | The Free Software Foundation may publish revised and/or new versions of 564 | the GNU Affero General Public License from time to time. Such new versions 565 | will be similar in spirit to the present version, but may differ in detail to 566 | address new problems or concerns. 567 | 568 | Each version is given a distinguishing version number. If the 569 | Program specifies that a certain numbered version of the GNU Affero General 570 | Public License "or any later version" applies to it, you have the 571 | option of following the terms and conditions either of that numbered 572 | version or of any later version published by the Free Software 573 | Foundation. If the Program does not specify a version number of the 574 | GNU Affero General Public License, you may choose any version ever published 575 | by the Free Software Foundation. 576 | 577 | If the Program specifies that a proxy can decide which future 578 | versions of the GNU Affero General Public License can be used, that proxy's 579 | public statement of acceptance of a version permanently authorizes you 580 | to choose that version for the Program. 581 | 582 | Later license versions may give you additional or different 583 | permissions. However, no additional obligations are imposed on any 584 | author or copyright holder as a result of your choosing to follow a 585 | later version. 586 | 587 | 15. Disclaimer of Warranty. 588 | 589 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 590 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 591 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 592 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 593 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 594 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 595 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 596 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 597 | 598 | 16. Limitation of Liability. 599 | 600 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 601 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 602 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 603 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 604 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 605 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 606 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 607 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 608 | SUCH DAMAGES. 609 | 610 | 17. Interpretation of Sections 15 and 16. 611 | 612 | If the disclaimer of warranty and limitation of liability provided 613 | above cannot be given local legal effect according to their terms, 614 | reviewing courts shall apply local law that most closely approximates 615 | an absolute waiver of all civil liability in connection with the 616 | Program, unless a warranty or assumption of liability accompanies a 617 | copy of the Program in return for a fee. 618 | 619 | END OF TERMS AND CONDITIONS 620 | 621 | How to Apply These Terms to Your New Programs 622 | 623 | If you develop a new program, and you want it to be of the greatest 624 | possible use to the public, the best way to achieve this is to make it 625 | free software which everyone can redistribute and change under these terms. 626 | 627 | To do so, attach the following notices to the program. It is safest 628 | to attach them to the start of each source file to most effectively 629 | state the exclusion of warranty; and each file should have at least 630 | the "copyright" line and a pointer to where the full notice is found. 631 | 632 | 633 | Copyright (C) 634 | 635 | This program is free software: you can redistribute it and/or modify 636 | it under the terms of the GNU Affero General Public License as published 637 | by the Free Software Foundation, either version 3 of the License, or 638 | (at your option) any later version. 639 | 640 | This program is distributed in the hope that it will be useful, 641 | but WITHOUT ANY WARRANTY; without even the implied warranty of 642 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643 | GNU Affero General Public License for more details. 644 | 645 | You should have received a copy of the GNU Affero General Public License 646 | along with this program. If not, see . 647 | 648 | Also add information on how to contact you by electronic and paper mail. 649 | 650 | If your software can interact with users remotely through a computer 651 | network, you should also make sure that it provides a way for users to 652 | get its source. For example, if your program is a web application, its 653 | interface could display a "Source" link that leads users to an archive 654 | of the code. There are many ways you could offer source, and different 655 | solutions will be better for different programs; see section 13 for the 656 | specific requirements. 657 | 658 | You should also get your employer (if you work as a programmer) or school, 659 | if any, to sign a "copyright disclaimer" for the program, if necessary. 660 | For more information on this, and how to apply and follow the GNU AGPL, see 661 | . -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # LearnCPP Downloader 2 | 3 | Multi-threaded web scraper to download all the tutorials from www.learncpp.com and convert them to PDF files concurrently. 4 | 5 | ## Support ❤️ 6 | 7 | Please support here: 8 | 9 | ## Usage 10 | 11 | ### Docker 12 | 13 | Get the image 14 | 15 | ```bash 16 | docker pull amalrajan/learncpp-download:latest 17 | ``` 18 | 19 | And run the container 20 | 21 | ```bash 22 | docker run --rm --name=learncpp-download --mount type=bind,destination=/app/learncpp,source=/home/amalr/temp/downloads amalrajan/learncpp-download 23 | ``` 24 | 25 | Replace `/home/amalr/temp/downloads` with a local path on your system where you'd want the files to get downloaded. 26 | 27 | ### Local 28 | 29 | You need Python 3.10 and `wkhtmltopdf` installed on your system. 30 | 31 | #### Run it 32 | 33 | Clone the repository 34 | 35 | ```bash 36 | git clone https://github.com/amalrajan/learncpp-download.git 37 | ``` 38 | 39 | Install Python dependencies 40 | 41 | ```bash 42 | cd learncpp-download 43 | pip install -r requirements.txt 44 | ``` 45 | 46 | Run the script 47 | 48 | ```bash 49 | scrapy crawl learncpp 50 | ``` 51 | 52 | You'll find the downloaded files inside `learncpp` directory under the repository root directory. 53 | 54 | ## FAQ 55 | 56 | **Rate Limit Errors:** 57 | 58 | - Modify `settings.py`. 59 | - Increase `DOWNLOAD_DELAY` (default: 0) to 0.2. 60 | 61 | **High CPU Usage:** 62 | 63 | - Adjust `max_workers` in `learncpp.py`. 64 | - Decrease from default 192 to reduce CPU load. 65 | 66 | ```python 67 | self.executor = ThreadPoolExecutor( 68 | max_workers=192 69 | ) # Limit to 192 concurrent PDF conversions 70 | ``` 71 | 72 | **Further Issues:** 73 | 74 | - Report at . Attach console logs. 75 | 76 | ## License 77 | 78 | [GNU Affero General Public License v3](https://www.gnu.org/licenses/agpl-3.0.en.html) 79 | -------------------------------------------------------------------------------- /requirements.txt: -------------------------------------------------------------------------------- 1 | attrs==23.2.0 2 | Automat==22.10.0 3 | beautifulsoup4==4.12.3 4 | certifi==2023.11.17 5 | cffi==1.16.0 6 | charset-normalizer==3.3.2 7 | constantly==23.10.4 8 | cryptography==42.0.1 9 | cssselect==1.2.0 10 | filelock==3.13.1 11 | hyperlink==21.0.0 12 | idna==3.6 13 | incremental==22.10.0 14 | itemadapter==0.8.0 15 | itemloaders==1.1.0 16 | jmespath==1.0.1 17 | lxml==5.1.0 18 | packaging==23.2 19 | parsel==1.8.1 20 | pdfkit==1.0.0 21 | Protego==0.3.0 22 | pyasn1==0.5.1 23 | pyasn1-modules==0.3.0 24 | pycparser==2.21 25 | PyDispatcher==2.0.7 26 | pyOpenSSL==24.0.0 27 | queuelib==1.6.2 28 | requests==2.31.0 29 | requests-file==1.5.1 30 | Scrapy==2.11.0 31 | service-identity==24.1.0 32 | six==1.16.0 33 | soupsieve==2.5 34 | tldextract==5.1.1 35 | Twisted==22.10.0 36 | typing_extensions==4.9.0 37 | urllib3==2.1.0 38 | w3lib==2.1.2 39 | zope.interface==6.1 40 | -------------------------------------------------------------------------------- /scraper/__init__.py: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/amalrajan/learncpp-download/d765c143cbf7ac65a4d5c27aa60ae927ab80217a/scraper/__init__.py -------------------------------------------------------------------------------- /scraper/items.py: -------------------------------------------------------------------------------- 1 | # Define here the models for your scraped items 2 | # 3 | # See documentation in: 4 | # https://docs.scrapy.org/en/latest/topics/items.html 5 | 6 | import scrapy 7 | 8 | 9 | class ScraperItem(scrapy.Item): 10 | # define the fields for your item here like: 11 | # name = scrapy.Field() 12 | pass 13 | -------------------------------------------------------------------------------- /scraper/middlewares.py: -------------------------------------------------------------------------------- 1 | # Define here the models for your spider middleware 2 | # 3 | # See documentation in: 4 | # https://docs.scrapy.org/en/latest/topics/spider-middleware.html 5 | 6 | from scrapy import signals 7 | 8 | # useful for handling different item types with a single interface 9 | from itemadapter import is_item, ItemAdapter 10 | 11 | 12 | class ScraperSpiderMiddleware: 13 | # Not all methods need to be defined. If a method is not defined, 14 | # scrapy acts as if the spider middleware does not modify the 15 | # passed objects. 16 | 17 | @classmethod 18 | def from_crawler(cls, crawler): 19 | # This method is used by Scrapy to create your spiders. 20 | s = cls() 21 | crawler.signals.connect(s.spider_opened, signal=signals.spider_opened) 22 | return s 23 | 24 | def process_spider_input(self, response, spider): 25 | # Called for each response that goes through the spider 26 | # middleware and into the spider. 27 | 28 | # Should return None or raise an exception. 29 | return None 30 | 31 | def process_spider_output(self, response, result, spider): 32 | # Called with the results returned from the Spider, after 33 | # it has processed the response. 34 | 35 | # Must return an iterable of Request, or item objects. 36 | for i in result: 37 | yield i 38 | 39 | def process_spider_exception(self, response, exception, spider): 40 | # Called when a spider or process_spider_input() method 41 | # (from other spider middleware) raises an exception. 42 | 43 | # Should return either None or an iterable of Request or item objects. 44 | pass 45 | 46 | def process_start_requests(self, start_requests, spider): 47 | # Called with the start requests of the spider, and works 48 | # similarly to the process_spider_output() method, except 49 | # that it doesn’t have a response associated. 50 | 51 | # Must return only requests (not items). 52 | for r in start_requests: 53 | yield r 54 | 55 | def spider_opened(self, spider): 56 | spider.logger.info("Spider opened: %s" % spider.name) 57 | 58 | 59 | class ScraperDownloaderMiddleware: 60 | # Not all methods need to be defined. If a method is not defined, 61 | # scrapy acts as if the downloader middleware does not modify the 62 | # passed objects. 63 | 64 | @classmethod 65 | def from_crawler(cls, crawler): 66 | # This method is used by Scrapy to create your spiders. 67 | s = cls() 68 | crawler.signals.connect(s.spider_opened, signal=signals.spider_opened) 69 | return s 70 | 71 | def process_request(self, request, spider): 72 | # Called for each request that goes through the downloader 73 | # middleware. 74 | 75 | # Must either: 76 | # - return None: continue processing this request 77 | # - or return a Response object 78 | # - or return a Request object 79 | # - or raise IgnoreRequest: process_exception() methods of 80 | # installed downloader middleware will be called 81 | return None 82 | 83 | def process_response(self, request, response, spider): 84 | # Called with the response returned from the downloader. 85 | 86 | # Must either; 87 | # - return a Response object 88 | # - return a Request object 89 | # - or raise IgnoreRequest 90 | return response 91 | 92 | def process_exception(self, request, exception, spider): 93 | # Called when a download handler or a process_request() 94 | # (from other downloader middleware) raises an exception. 95 | 96 | # Must either: 97 | # - return None: continue processing this exception 98 | # - return a Response object: stops process_exception() chain 99 | # - return a Request object: stops process_exception() chain 100 | pass 101 | 102 | def spider_opened(self, spider): 103 | spider.logger.info("Spider opened: %s" % spider.name) 104 | -------------------------------------------------------------------------------- /scraper/pipelines.py: -------------------------------------------------------------------------------- 1 | # Define your item pipelines here 2 | # 3 | # Don't forget to add your pipeline to the ITEM_PIPELINES setting 4 | # See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html 5 | 6 | 7 | # useful for handling different item types with a single interface 8 | from itemadapter import ItemAdapter 9 | 10 | 11 | class ScraperPipeline: 12 | def process_item(self, item, spider): 13 | return item 14 | -------------------------------------------------------------------------------- /scraper/settings.py: -------------------------------------------------------------------------------- 1 | # Scrapy settings for scraper project 2 | # 3 | # For simplicity, this file contains only settings considered important or 4 | # commonly used. You can find more settings consulting the documentation: 5 | # 6 | # https://docs.scrapy.org/en/latest/topics/settings.html 7 | # https://docs.scrapy.org/en/latest/topics/downloader-middleware.html 8 | # https://docs.scrapy.org/en/latest/topics/spider-middleware.html 9 | 10 | BOT_NAME = "scraper" 11 | 12 | SPIDER_MODULES = ["scraper.spiders"] 13 | NEWSPIDER_MODULE = "scraper.spiders" 14 | 15 | 16 | # Crawl responsibly by identifying yourself (and your website) on the user-agent 17 | # USER_AGENT = "scraper (+http://www.yourdomain.com)" 18 | 19 | # Obey robots.txt rules 20 | ROBOTSTXT_OBEY = True 21 | 22 | # Configure maximum concurrent requests performed by Scrapy (default: 16) 23 | CONCURRENT_REQUESTS = 64 24 | 25 | # Configure a delay for requests for the same website (default: 0) 26 | # See https://docs.scrapy.org/en/latest/topics/settings.html#download-delay 27 | # See also autothrottle settings and docs 28 | DOWNLOAD_DELAY = 0 # Adjust this value if you get blocked 29 | # The download delay setting will honor only one of: 30 | # CONCURRENT_REQUESTS_PER_DOMAIN = 16 31 | # CONCURRENT_REQUESTS_PER_IP = 16 32 | 33 | # Disable cookies (enabled by default) 34 | # COOKIES_ENABLED = False 35 | 36 | # Disable Telnet Console (enabled by default) 37 | # TELNETCONSOLE_ENABLED = False 38 | 39 | # Override the default request headers: 40 | # DEFAULT_REQUEST_HEADERS = { 41 | # "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", 42 | # "Accept-Language": "en", 43 | # } 44 | 45 | # Enable or disable spider middlewares 46 | # See https://docs.scrapy.org/en/latest/topics/spider-middleware.html 47 | # SPIDER_MIDDLEWARES = { 48 | # "scraper.middlewares.ScraperSpiderMiddleware": 543, 49 | # } 50 | 51 | # Enable or disable downloader middlewares 52 | # See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html 53 | # DOWNLOADER_MIDDLEWARES = { 54 | # "scraper.middlewares.ScraperDownloaderMiddleware": 543, 55 | # } 56 | 57 | # Enable or disable extensions 58 | # See https://docs.scrapy.org/en/latest/topics/extensions.html 59 | # EXTENSIONS = { 60 | # "scrapy.extensions.telnet.TelnetConsole": None, 61 | # } 62 | 63 | # Configure item pipelines 64 | # See https://docs.scrapy.org/en/latest/topics/item-pipeline.html 65 | # ITEM_PIPELINES = { 66 | # "scraper.pipelines.ScraperPipeline": 300, 67 | # } 68 | 69 | # Enable and configure the AutoThrottle extension (disabled by default) 70 | # See https://docs.scrapy.org/en/latest/topics/autothrottle.html 71 | # AUTOTHROTTLE_ENABLED = True 72 | # The initial download delay 73 | # AUTOTHROTTLE_START_DELAY = 5 74 | # The maximum download delay to be set in case of high latencies 75 | # AUTOTHROTTLE_MAX_DELAY = 60 76 | # The average number of requests Scrapy should be sending in parallel to 77 | # each remote server 78 | # AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0 79 | # Enable showing throttling stats for every response received: 80 | # AUTOTHROTTLE_DEBUG = False 81 | 82 | # Enable and configure HTTP caching (disabled by default) 83 | # See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings 84 | # HTTPCACHE_ENABLED = True 85 | # HTTPCACHE_EXPIRATION_SECS = 0 86 | # HTTPCACHE_DIR = "httpcache" 87 | # HTTPCACHE_IGNORE_HTTP_CODES = [] 88 | # HTTPCACHE_STORAGE = "scrapy.extensions.httpcache.FilesystemCacheStorage" 89 | 90 | # Set settings whose default value is deprecated to a future-proof value 91 | REQUEST_FINGERPRINTER_IMPLEMENTATION = "2.7" 92 | TWISTED_REACTOR = "twisted.internet.asyncioreactor.AsyncioSelectorReactor" 93 | FEED_EXPORT_ENCODING = "utf-8" 94 | -------------------------------------------------------------------------------- /scraper/spiders/__init__.py: -------------------------------------------------------------------------------- 1 | # This package will contain the spiders of your Scrapy project 2 | # 3 | # Please refer to the documentation for information on how to create and manage 4 | # your spiders. 5 | -------------------------------------------------------------------------------- /scraper/spiders/learncpp.py: -------------------------------------------------------------------------------- 1 | import dataclasses 2 | import os 3 | import pathlib 4 | import typing 5 | import urllib.request 6 | from concurrent.futures import ThreadPoolExecutor 7 | 8 | import bs4 9 | import pdfkit 10 | import scrapy 11 | 12 | 13 | @dataclasses.dataclass 14 | class URL: 15 | index: int 16 | url: str 17 | 18 | 19 | class LearncppSpider(scrapy.Spider): 20 | name = "learncpp" 21 | allowed_domains = ["learncpp.com"] 22 | 23 | # Define ThreadPoolExecutor 24 | def __init__(self, *args, **kwargs): 25 | super().__init__(*args, **kwargs) 26 | self.executor = ThreadPoolExecutor( 27 | max_workers=192 28 | ) # Limit to 192 concurrent PDF conversions 29 | 30 | def create_working_directory(self) -> None: 31 | # Create a directory named "learncpp" if it doesn't exist 32 | if not os.path.exists(self.name): 33 | os.mkdir(self.name) 34 | self.log(f"Created working directory: {self.name}") 35 | 36 | def start_requests(self) -> typing.Union[scrapy.Request, None]: 37 | # Create a working directory 38 | self.create_working_directory() 39 | 40 | # Use get_urls function to dynamically generate start_urls 41 | urls = self.get_urls() 42 | self.log(f"Found {len(urls)} URLs to scrape.") 43 | 44 | for url in urls: 45 | self.log(f"Processing URL: {url.url}") 46 | 47 | # Yield a Request object for each URL 48 | yield scrapy.Request( 49 | url=url.url, 50 | callback=self.parse, 51 | cb_kwargs={"page_index": str(url.index)}, 52 | ) 53 | 54 | def parse( 55 | self, 56 | response: scrapy.http.response.Response, 57 | page_index: int, 58 | ) -> None: 59 | # Modify the filename to include the index 60 | parsed_url = pathlib.Path(response.url) 61 | filename = f"{page_index}-{parsed_url.parts[-1]}.html" 62 | self.log(f"Processing HTML for {filename}") 63 | 64 | # Save the HTML file 65 | with open(os.path.join(self.name, filename), "wb") as f: 66 | f.write(response.body) 67 | self.log(f"Saved HTML file: {filename}") 68 | 69 | # Clean the HTML file 70 | self.clean(filename) 71 | self.log(f"Cleaned HTML for {filename}") 72 | 73 | # Run convert_to_pdf function in a ThreadPool 74 | self.executor.submit(self.convert_to_pdf, filename) 75 | self.log(f"Started PDF conversion for {filename}") 76 | 77 | def clean(self, filename: str) -> None: 78 | # Read the HTML file 79 | with open(os.path.join(self.name, filename), "r", encoding="utf-8") as file: 80 | html_content = file.read() 81 | 82 | # Parse the HTML content 83 | soup = bs4.BeautifulSoup(html_content, "html.parser") 84 | 85 | # List of div IDs to remove 86 | div_ids_to_remove = [ 87 | "comments", 88 | "site-header-main", 89 | "header-image-main", 90 | "colophon-inside", 91 | ] 92 | 93 | # Class name to remove 94 | classes_to_remove = ["code-block code-block-10", "cf_monitor"] 95 | 96 | # Remove elements by tag, attribute, and values 97 | self.remove_elements_by_attribute( 98 | soup, 99 | "div", 100 | "id", 101 | div_ids_to_remove, 102 | ) 103 | self.remove_elements_by_attribute( 104 | soup, 105 | "div", 106 | "class", 107 | classes_to_remove, 108 | ) 109 | 110 | # Remove the footer 111 | self.remove_elements_by_attribute( 112 | soup, "footer", "class", ["entry-meta entry-utility"] 113 | ) 114 | 115 | # Save the modified HTML content 116 | with open(os.path.join(self.name, filename), "w", encoding="utf-8") as file: 117 | file.write(str(soup)) 118 | self.log(f"Saved cleaned HTML for {filename}") 119 | 120 | def remove_elements_by_attribute( 121 | self, 122 | soup: bs4.BeautifulSoup, 123 | tag: str, 124 | attribute: str, 125 | values: typing.List[str], 126 | ) -> None: 127 | for value in values: 128 | elements = soup.find_all(tag, {attribute: value}) 129 | for element in elements: 130 | element.decompose() 131 | 132 | def convert_to_pdf(self, filename: str) -> None: 133 | # Original file path 134 | pdf_filename = pathlib.Path(filename).with_suffix(".pdf") 135 | 136 | # Convert the modified HTML file to PDF 137 | try: 138 | pdfkit.from_file( 139 | os.path.join(self.name, filename), 140 | os.path.join(self.name, pdf_filename), 141 | options={"enable-local-file-access": ""}, 142 | ) 143 | except OSError as e: 144 | if ( 145 | "QNetworkReplyImplPrivate::error: Internal problem, this method must only be called once." 146 | in str(e) 147 | ): 148 | # If so, suppress the error 149 | pass 150 | 151 | self.log(f"Converted {filename} to PDF: {pdf_filename}") 152 | 153 | def get_urls(self) -> typing.List[URL]: 154 | try: 155 | # Parse the HTML content with BeautifulSoup 156 | html_content = urllib.request.urlopen( 157 | urllib.request.Request( 158 | "http://www.learncpp.com", 159 | headers={"User-Agent": "Mozilla/5.0"}, 160 | ) 161 | ).read() 162 | except urllib.error.URLError as e: 163 | self.log(f"Error accessing the website: {e}") 164 | return [] 165 | 166 | try: 167 | soup = bs4.BeautifulSoup(html_content, "html.parser") 168 | 169 | # Find all divs with class "lessontable-row-title" 170 | all_divs = soup.find_all("div", class_="lessontable-row-title") 171 | 172 | # List to store the URLs 173 | fetched_urls = [] 174 | 175 | # Variable to store indices 176 | page_index = 1 177 | 178 | # Iterate through each div and find all tags inside 179 | for div in all_divs: 180 | all_a_tags = div.find_all("a") 181 | 182 | for a_tag in all_a_tags: 183 | # Append the URL to the list 184 | fetched_urls.append(URL(page_index, a_tag["href"])) 185 | 186 | # Increment the index 187 | page_index += 1 188 | 189 | self.log(f"Successfully fetched {len(fetched_urls)} URLs") 190 | return fetched_urls 191 | 192 | except Exception as e: 193 | self.log(f"Error parsing HTML content: {e}") 194 | return [] 195 | -------------------------------------------------------------------------------- /scrapy.cfg: -------------------------------------------------------------------------------- 1 | # Automatically created by: scrapy startproject 2 | # 3 | # For more information about the [deploy] section see: 4 | # https://scrapyd.readthedocs.io/en/latest/deploy.html 5 | 6 | [settings] 7 | default = scraper.settings 8 | 9 | [deploy] 10 | #url = http://localhost:6800/ 11 | project = scraper 12 | --------------------------------------------------------------------------------