spiders | python spiders | Crawler library
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QUESTION
I'd like to give a shot to using Scrapy contracts, as an alternative to full-fledged test suites.
The following is a detailed description of the steps to duplicate.
In a tmp
directory
ANSWER
Answered 2021-Jun-12 at 00:19With @url http://www.amazon.com/s?field-keywords=selfish+gene
I get also error 503
.
Probably it is very old example - it uses http
but modern pages use https
- and amazone
could rebuild page and now it has better system to detect spamers/hackers/bots and block them.
If I use @url http://toscrape.com/
then I don't get error 503
but I still get other error FAILED
because it needs some code in parse()
@scrapes Title Author Year Price
means it has to return item with keys Title Author Year Price
QUESTION
I am currently building a small test project to learn how to use crontab
on Linux (Ubuntu 20.04.2 LTS).
My crontab file looks like this:
* * * * * sh /home/path_to .../crontab_start_spider.sh >> /home/path_to .../log_python_test.log 2>&1
What I want crontab to do, is to use the shell file below to start a scrapy project. The output is stored in the file log_python_test.log.
My shell file (numbers are only for reference in this question):
...ANSWER
Answered 2021-Jun-07 at 15:35I found a solution to my problem. In fact, just as I suspected, there was a missing directory to my PYTHONPATH. It was the directory that contained the gtts package.
Solution: If you have the same problem,
- Find the package
I looked at that post
- Add it to sys.path (which will also add it to PYTHONPATH)
Add this code at the top of your script (in my case, the pipelines.py):
QUESTION
I have made 1 file with 2 spiders/classes. the 2nd spider with use some data from the first one. but it doesn't seem to work. here is what i do to initiate and start the spiders
...ANSWER
Answered 2021-Jun-03 at 17:46Your code will run 2 spiders simultaneously.
Running spiders sequentially (start Zoopy2
after completion of Zoopy1
) can be achieved with @defer.inlineCallbacks
:
QUESTION
I'm using scrapy and I'm traying to scrape Technical descriptions from products. But i can't find any tutorial for what i'm looking for.
I'm using this web: Air Conditioner 1
For exemple, i need to extract the model of that product:
Modelo ---> KCIN32HA3AN
. It's in the 5th place.
(//span[@class='gb-tech-spec-module-list-description'])[5]
But if i go this other product: Air Conditioner 2
The model is: Modelo ---> ALS35-WCCR
And it's in the 6th position. And i only get this 60 m3
since is the 5th position.
I don't know how to iterate to obtain each model no matter the position.
This is the code i'm using right now
...ANSWER
Answered 2021-May-26 at 05:30For those two, you can use the following css selector:
QUESTION
I am trying to fetch the links from the scorecard column on this page...
I am using a crawlspider, and trying to access the links with this xpath expression....
...ANSWER
Answered 2021-May-26 at 10:50The key line in the log is this one
QUESTION
I am using Scrapy with Splash. Here is what I have in my spider:
...ANSWER
Answered 2021-May-23 at 10:57I ditched the Crawl Spider and converted to a regular spider, and things are working fine now.
QUESTION
I'm trying to scrape a specific website. The code I'm using to scrape it is the same as that being used to scrape many other sites successfully.
However, the resulting response.body
looks completely corrupt (segment below):
ANSWER
Answered 2021-May-12 at 12:48Thanks to Serhii's suggestion, I found that the issue was due to "accept-encoding": "gzip, deflate, br"
: I accepted compressed sites but did not handle them in scrapy.
Adding scrapy.downloadermiddlewares.httpcompression
or simply removing the accept-encoding
line fixes the issue.
QUESTION
I have about 100 spiders on a server. Every morning all spiders start scraping and writing all of the logs in their logs. Sometimes a couple of them gives me an error. When a spider gives me an error I have to go to the server and read from log file but I want to read the logs from the mail.
I already set dynamic mail sender as follow:
...ANSWER
Answered 2021-May-08 at 07:57I have implemented a similar method in my web scraping module.
Below is the implementation you can look at and take reference from.
QUESTION
Hello I have working code like this:
...ANSWER
Answered 2021-May-07 at 03:56please remove the below line from your code
QUESTION
I want to install Scrapy on Windows Server 2019, running in a Docker container (please see here and here for the history of my installation).
On my local Windows 10 machine I can run my Scrapy commands like so in Windows PowerShell (after simply starting Docker Desktop):
scrapy crawl myscraper -o allobjects.json
in folder C:\scrapy\my1stscraper\
For Windows Server as recommended here I first installed Anaconda following these steps: https://docs.scrapy.org/en/latest/intro/install.html.
I then opened the Anaconda prompt and typed conda install -c conda-forge scrapy
in D:\Programs
ANSWER
Answered 2021-Apr-27 at 15:14To run a containerised app, it must be installed in a container image first - you don't want to install any software on the host machine.
For linux there are off-the-shelf container images for everything which is probably what your docker desktop environment was using; I see 1051 results on docker hub search for scrapy
but none of them are windows containers.
The full process of creating a windows container from scratch for an app is:
- Get steps to manually install the app (scrapy and its dependencies) on Windows Server - ideally test in a virtualised environment so you can reset it cleanly
- Convert all steps to a fully automatic powershell script (e.g. for
conda
, need to download the installer viawget
, execute the installer etc. - Optionaly, test the powershell steps in an interactive container
docker run -it --isolation=process mcr.microsoft.com/windows/servercore:ltsc2019 powershell
- This runs a windows container and gives you a shell to verify that your install script works
- When you exit the shell the container is stopped
- Create a
Dockerfile
- Use
mcr.microsoft.com/windows/servercore:ltsc2019
as the base image viaFROM
- Use the
RUN
command for each line of your powershell script
- Use
I tried installing scrapy on an existing windows Dockerfile that used conda / python 3.6, it threw error SettingsFrame has no attribute 'ENABLE_CONNECT_PROTOCOL'
at a similar stage.
However I tried again with miniconda
and python 3.8, and was able to get scrapy
running, here's the dockerfile:
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Install spiders
You can use spiders like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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