Seen | lightweight crawling/spider framework | Crawler library

 by   HuberTRoy Python Version: Current License: No License

kandi X-RAY | Seen Summary

kandi X-RAY | Seen Summary

Seen is a Python library typically used in Automation, Crawler, Selenium, Framework applications. Seen has no bugs, it has no vulnerabilities, it has build file available and it has low support. You can download it from GitHub.

Seen is a lightweight web crawling framework for everyone. Written with asyncio,aiohttp/requests. It is useful for writing a web crawling quickly and get FULL JavaScript Support.
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              Seen has a low active ecosystem.
              It has 13 star(s) with 3 fork(s). There are 3 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              Seen has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of Seen is current.

            kandi-Quality Quality

              Seen has no bugs reported.

            kandi-Security Security

              Seen has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              Seen does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              Seen releases are not available. You will need to build from source code and install.
              Build file is available. You can build the component from source.
              Installation instructions are not available. Examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed Seen and discovered the below as its top functions. This is intended to give you an instant insight into Seen implemented functionality, and help decide if they suit your requirements.
            • Start the crawler
            • Parse a response
            • Add URLs to work queue
            • Perform the work
            • Check if the given URL is valid
            • Get host from url
            • Parse response content
            • Close the session
            • Make a GET request
            • HTTP GET request
            • Handle the HTTP request
            • Make an http request
            • Fetch a given URL
            • Handle URL failure
            • Return an empty browser response
            • Fetch a URL
            • Fetch content from url
            • Make a POST request
            • Issue HTTP POST request
            Get all kandi verified functions for this library.

            Seen Key Features

            No Key Features are available at this moment for Seen.

            Seen Examples and Code Snippets

            No Code Snippets are available at this moment for Seen.

            Community Discussions

            QUESTION

            remove duplicates , but have problems with delete column with "-"
            Asked 2021-Jun-16 at 02:46

            i have this input file.. I need to remove the duplicated rows in column 13 but I have a problem with the data that contains a "-" why does it not remove them

            input

            ...

            ANSWER

            Answered 2021-Jun-16 at 01:50

            If your sample input is accurate, some of your column 13 contain trailing whitespace. If you want to treat them as being the same value, you can trim it.

            For example, before using column 13, you could do:

            Source https://stackoverflow.com/questions/67995108

            QUESTION

            Project Structure and Committing golang projects
            Asked 2021-Jun-16 at 02:46

            TL;DR: Why do I name go projects with a website in the path, and where do I initialize git within that path? ELI5, please.

            I'm having a hard time understanding the fundamental purpose and use of the file/folder/repo structure and convention of projects/apps in the go language. I've seen a few posts, but they don't answer my overarching question of use/function and I just don't get it. Need ELI5 I guess.

            Why are so many project's paths written as:

            ...

            ANSWER

            Answered 2021-Jun-16 at 02:46

            Why do I name projects with a website in the path?

            If your package has the exact same import path as someone else's package, then someone will have a hard time trying to use both packages in the same project because the import paths are not unique. So long as everyone uses a string equal to a URL that they effectively "own", such as your GitHub account (or actually own, such as your own domain), then these name collisions will not occur (excepting the fact that ownership of URLs may change over time).

            It also makes it easier to go get your project, since the host location is part of the import string. Every source file that uses the package also tells you where to get it from. That is a nice property to have.

            Where do I initialize git?

            Your project should have some root folder that contains everything in the project, and nothing outside of the project. Initialize git in this directory. It's also common to initialize your Go module here, if it's a Go project.

            You may be restricted on where to put the git root by where you're trying to host the code. For example, if hosting on GitHub, all of the code you push has to go inside a repository. This means that you can put your git root in a higher directory that contains all your repositories, but there's no way (that I know of) to actually push this to the remote. Remember that your local file system is not the same as the remote host's. You may have a local folder called github.com/myname/, but that doesn't mean that the remote end supports writing files to such a location.

            Source https://stackoverflow.com/questions/67995562

            QUESTION

            How to fetch remote branch properly?
            Asked 2021-Jun-16 at 01:25

            I had to delete my git branch and now need to fetch that remote branch.

            I did the following steps as I've seen someone's post here.

            ...

            ANSWER

            Answered 2021-Jun-16 at 01:25

            If anyone help me understand whether my-branch will be matched with the remote one or not

            Probably. But it's impossible to be certain from the info you have given. To find out, say

            Source https://stackoverflow.com/questions/67995192

            QUESTION

            How to use select() to set a timer for sockets?
            Asked 2021-Jun-15 at 21:17

            I'm currently using Winsock2 to be able to test a connection to multiple local telnet servers, but if the server connection fails, the default Winsock client takes forever to timeout.

            I've seen from other posts that select() can set a timeout for the connection part, and that setsockopt() with timeval can timeout the receiving portion of the code, but I have no idea how to implement either. Pieces of code that I've copy/pasted from other answers always seem to fail for me.

            How would I use both of these functions in the default client code? Or, if it isn't possible to use those functions in the default client code, can someone give me some pointers on how to use those functions correctly?

            ...

            ANSWER

            Answered 2021-Jun-15 at 21:17

            select() can set a timeout for the connection part.

            Yes, but only if you put the socket into non-blocking mode before calling connect(), so that connect() exits immediately and then the code can use select() to wait for the socket to report when the connect operation has finished. But the code shown is not doing that.

            setsockopt() with timeval can timeout the receiving portion of the code

            Yes, though select() can also be used to timeout a read operation, as well. Simply call select() first, and then call recv() only if select() reports that the socket is readable (has pending data to read).

            Try something like this:

            Source https://stackoverflow.com/questions/67990097

            QUESTION

            Using std::atomic with futex system call
            Asked 2021-Jun-15 at 20:48

            In C++20, we got the capability to sleep on atomic variables, waiting for their value to change. We do so by using the std::atomic::wait method.

            Unfortunately, while wait has been standardized, wait_for and wait_until are not. Meaning that we cannot sleep on an atomic variable with a timeout.

            Sleeping on an atomic variable is anyway implemented behind the scenes with WaitOnAddress on Windows and the futex system call on Linux.

            Working around the above problem (no way to sleep on an atomic variable with a timeout), I could pass the memory address of an std::atomic to WaitOnAddress on Windows and it will (kinda) work with no UB, as the function gets void* as a parameter, and it's valid to cast std::atomic to void*

            On Linux, it is unclear whether it's ok to mix std::atomic with futex. futex gets either a uint32_t* or a int32_t* (depending which manual you read), and casting std::atomic to u/int* is UB. On the other hand, the manual says

            The uaddr argument points to the futex word. On all platforms, futexes are four-byte integers that must be aligned on a four- byte boundary. The operation to perform on the futex is specified in the futex_op argument; val is a value whose meaning and purpose depends on futex_op.

            Hinting that alignas(4) std::atomic should work, and it doesn't matter which integer type is it is as long as the type has the size of 4 bytes and the alignment of 4.

            Also, I have seen many places where this trick of combining atomics and futexes is implemented, including boost and TBB.

            So what is the best way to sleep on an atomic variable with a timeout in a non UB way? Do we have to implement our own atomic class with OS primitives to achieve it correctly?

            (Solutions like mixing atomics and condition variables exist, but sub-optimal)

            ...

            ANSWER

            Answered 2021-Jun-15 at 20:48

            You shouldn't necessarily have to implement a full custom atomic API, it should actually be safe to simply pull out a pointer to the underlying data from the atomic and pass it to the system.

            Since std::atomic does not offer some equivalent of native_handle like other synchronization primitives offer, you're going to be stuck doing some implementation-specific hacks to try to get it to interface with the native API.

            For the most part, it's reasonably safe to assume that first member of these types in implementations will be the same as the T type -- at least for integral values [1]. This is an assurance that will make it possible to extract out this value.

            ... and casting std::atomic to u/int* is UB

            This isn't actually the case.

            std::atomic is guaranteed by the standard to be Standard-Layout Type. One helpful but often esoteric properties of standard layout types is that it is safe to reinterpret_cast a T to a value or reference of the first sub-object (e.g. the first member of the std::atomic).

            As long as we can guarantee that the std::atomic contains only the u/int as a member (or at least, as its first member), then it's completely safe to extract out the type in this manner:

            Source https://stackoverflow.com/questions/67034029

            QUESTION

            Div with absolute width is smaller than specified
            Asked 2021-Jun-15 at 20:37

            I am trying to have a number of columns with exact widths, and their heights split evenly between some number of elements. For some reason, despite my indicating an exact 200px width on each column, they are instead getting a computed width of 162px somehow. Chrome dev tools is showing some weird arrow thing indicating that it it was shrunk from it's intended size for some reason. I've even tried removing all of the content from the div's as possible so as to rule out some weird interaction with the size of children.

            The html for the relevant area is this:

            ...

            ANSWER

            Answered 2021-Jun-15 at 20:20

            Setting display: flex turns the sizing of child elements over to the flex container. If you don't want the individual elements to resize, set flex-grow: 0, flex-shrink: 0, and flex-basis: 200px. You can do all three using the flex shorthand:

            Source https://stackoverflow.com/questions/67992773

            QUESTION

            Passing and retrieving MutableList or ArrayList from Activity A to B
            Asked 2021-Jun-15 at 20:06

            I need to pass this:

            ...

            ANSWER

            Answered 2021-Jun-15 at 19:49

            You can use simply intent.putExtra instead of worrying about which variant like put_____Extra to use.

            When extracting the value, you can use intent.extras to get the Bundle and then you can use get() on the Bundle and cast to the appropriate type. This is easier than trying to figure out which intent.get____Extra function to use to extract it, since you will have to cast it anyway.

            The below code works whether your data class is Serializeable or Parcelable. You don't need to use arrays, because ArrayLists themselves are Serializeable, but you do need to convert from MutableList to ArrayList.

            Source https://stackoverflow.com/questions/67989536

            QUESTION

            Managing nested Firebase realtime DB queries with await/async
            Asked 2021-Jun-15 at 19:34

            I'm writing a Firebase function (Gist) which

            1. Queries a realtime database ref (events) in the following fashion:

              await admin.database().ref('/events_geo').once('value').then(snapshots => {

            2. Iterates through all the events

              snapshots.forEach(snapshot => {

            3. Events are filtered by a criteria for further processing

            4. Several queries are fired off towards realtime DB to get details related to the event

              await database().ref("/ratings").orderByChild('fk_event').equalTo(snapshot.key).once('value').then(snapshots => {

            5. Data is prepared for SendGrid and the processing is finished

            All of the data processing works perfectly fine but I can't get the outer await (point 1 in my list) to wait for the inner awaits (queries towards realtime DB) and thus when SendGrid should be called the data is empty. The data arrives a little while later. Example output from Firebase function logs can be seen below:

            10:54:12.642 AM Function execution started

            10:54:13.945 AM There are no emails to be sent in afterEventHostMailGoodRating

            10:54:14.048 AM There are no emails to be sent in afterEventHostMailBadRating

            10:54:14.052 AM Function execution took 1412 ms, finished with status: 'ok'

            10:54:14.148 AM

            Super hyggelig aften :)

            super oplevelse, ... long string generated

            Gist showing the function in question

            I'm probably mixing up my async/awaits because of the awaits inside the await. But I don't see how else the code could be written without splitting it out into many atomic pieces but that would still require stitching a bunch of awaits together and make it harder to read.

            So, two questions in total. Can this code work and what would be the ideal way to handle this pattern of making further processing on top of data fetched from Realtime DB?

            Best regards, Simon

            ...

            ANSWER

            Answered 2021-Jun-15 at 11:20

            Your problem is that you use async in a foreEach loop here:

            Source https://stackoverflow.com/questions/67984092

            QUESTION

            Preg_match is "ignoring" a capture group delimiter
            Asked 2021-Jun-15 at 17:46

            We have thousands of structured filenames stored in our database, and unfortunately many hundreds have been manually altered to names that do not follow our naming convention. Using regex, I'm trying to match the correct file names in order to identify all the misnamed ones. The files are all relative to a meeting agenda, and use the date, meeting type, Agenda Item#, and description in the name.

            Our naming convention is yyyymmdd_aa[_bbb]_ccccc.pdf where:

            • yyyymmdd is a date (and may optionally use underscores such as yyyy_mm_dd)
            • aa is a 2-3 character Meeting Type code
            • bbb is an optional Agenda Item
            • ccccc is a freeform variable length description of the file (alphanumeric only)

            Example filenames:

            ...

            ANSWER

            Answered 2021-Jun-15 at 17:46

            The optional identifier ? is for the last thing, either a characters or group. So the expression ([a-z0-9]{1,3})_? makes the underscore optional, but not the preceding group. The solution is to move the underscore into the parenthesis.

            Source https://stackoverflow.com/questions/67990467

            QUESTION

            PHP download file didn't download the expected file
            Asked 2021-Jun-15 at 16:08

            I am trying to download a file that i have uploaded in the my uploads folder. The directory is like this:

            ...

            ANSWER

            Answered 2021-Jun-15 at 16:08

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install Seen

            You can download it from GitHub.
            You can use Seen 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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