Urllib request catch timeout

Bases: exceptions. Bases: object. Bases: httplib. HTTPConnectionobject. Based on httplib. HTTPConnection but provides an extra constructor backwards-compatibility layer between older and newer Pythons. Additional keyword parameters are used to configure attributes of the connection. Accepted parameters include:. Or you may want to disable the defaults by passing an empty list e. In addition, some servers may not expect to receive the trailing dot when provided. Alternative to the common request method, which sends the body with chunked encoding and not as one block.

Bases: urllib3. ConnectionPoolurllib3. Check if the given url is a member of the same host as this connection pool. Get a connection from the pool and perform an HTTP request. Configure the number of retries to allow before raising a MaxRetryError exception. Pass None to retry until you receive a response. Pass a Retry object for fine-grained control over different types of retries.

Pass an integer number to retry connection errors that many times, but no other types of errors. Pass zero to never retry. If Falsethen retries are disabled and any exception is raised immediately.

Also, instead of raising a MaxRetryError on redirects, the redirect response will be returned. Given a url, return an ConnectionPool instance of its host. This is a shortcut for not having to parse out the scheme, host, and port of the url before creating an ConnectionPool instance.

Body should be httplib. HTTPErrorhttplib.

Python3 urllib.request.urlopen Example

IncompleteRead to allow int value for partial to avoid creating large objects on streamed reads. ValueErrorurllib3. ConnectTimeoutErrorurllib3. AssertionErrorexceptions. TimeoutErrorurllib3. ProtocolErrorexceptions. A RequestField factory from old-style tuple parameters. For example:.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. Fixes Cleaned up version of Looks like there are tests failures and coverage. Could you investigate this if you have the time? I added url to conform to the ReadTimeoutError constructor. I agree it is very ugly.

I partially put this pull request up to get your feedback on ways to do it better. Let's make the url None for now, rather than add another param to the constructor.

Perhaps we'll find a better place for it later. Kinda tempted to pull out some of the meat of read The outer try block is for properly returning the connection to the pool. I considered setting the url to None because probably the caller will have access to the url they request for. The exception's constructor is just wrong then though.

I feel that this flakeyness has been recent. We managed to get the tests to a very stable state until the last month or two. You can see that when the timeout was a very low number close to the triggering value it failed on the 2 newest python's.

Then when I raised the timeout ridiculously high it failed on one of them and succeeded on the other while an unrelated test failed on a different one. We really should pull the timeout magic values into a constant somewhere. Hah a different test fails on every push. Even 2. I switched to using the Event primitive and it seems to have cleared those issues up.

I wonder if there are other places that suffer a similar fate. Good idea. Event is vastly preferred over sleeping. Wish we could port more of the tests to that. I switched the code so the url isn't being passed into the response object. If that is what we want to do for now then I think this is good to go.

Or I can do it after merging. Btw, if you have a chance, could you add me as a contributor to your fork? This will let me make small inline edits in the PR.

I wonder if the error message could be a little better. This and are the only places in the code base remaining where httplib exceptions can come from I believe. What'd you have in mind for the error message?The urllib. The Requests package is recommended for a higher-level http client interface. Open the URL urlwhich can be either a string or a Request object.

21.6. urllib.request — Extensible library for opening URLs

It should be encoded to bytes before being used as the data parameter. The charset parameter in Content-Type header may be used to specify the encoding. It is advisable to use charset parameter with encoding used in Content-Type header with the Request. The optional timeout parameter specifies a timeout in seconds for blocking operations like the connection attempt if not specified, the global default timeout setting will be used.

If context is specified, it must be a ssl. More information can be found in ssl. For http and https urls, this function returns a http. For ftp, file, and data urls and requests explicitly handled by legacy URLopener and FancyURLopener classes, this function returns a urllib. Raises URLError on errors. Note that None may be returned if no handler handles the request though the default installed global OpenerDirector uses UnknownHandler to ensure this never happens.

The legacy urllib. Proxy handling, which was done by passing a dictionary parameter to urllib. Changed in version 3. New in version 3. Install an OpenerDirector instance as the default global opener. Installing an opener is only necessary if you want urlopen to use that opener; otherwise, simply call OpenerDirector. The code does not check for a real OpenerDirectorand any class with the appropriate interface will work.

Return an OpenerDirector instance, which chains the handlers in the order given. If the Python installation has SSL support i. Convert the pathname path from the local syntax for a path to the form used in the path component of a URL. This does not produce a complete URL. The return value will already be quoted using the quote function. Convert the path component path from a percent-encoded URL to the local syntax for a path.

This does not accept a complete URL. This function uses unquote to decode path. This helper function returns a dictionary of scheme to proxy server URL mappings. The final two arguments are only of interest for correct handling of third-party HTTP cookies:. It defaults to http. This is the host name or IP address of the original request that was initiated by the user.

urllib request catch timeout

For example, if the request is for an image in an HTML document, this should be the request-host of the request for the page containing the image. It defaults to False. An unverifiable request is one whose URL the user did not have the option to approve.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. If you've installed bluebirdbluebird will be used. Otherwise, if you're using a node that has native v8 Promises v0. Otherwise, this library will crash the process and exit, so you might as well install bluebird as a dependency!

If you are using co or koa :. ClientRequest - The request. For GET request, data will be stringify to query string, e. If the underlaying connection was terminated before response.

HttpClient2 is a new instance for future. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. JavaScript TypeScript. JavaScript Branch: master. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again.

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Sep 26, Oct 23, Dec 9, Jul 31, Oct 15, May 6, Mar 21, Release 2. Feb 28, By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. First off, my problem is quite similar to this one. I would like a timeout of urllib.

There was a major change from in Python 3 when they re-organised the urllib and urllib2 modules into urllib. Is it possible that there was a change then that causes this? The previous answer does not correctly intercept timeout errors. Timeout errors are raised as URLErrorso if we want to specifically catch them, we need to write:.

Note that ValueError can independently be raised, i. Learn more. How to handle urllib's timeout in Python 3? Ask Question. Asked 8 years, 3 months ago. Active 1 year, 1 month ago. Viewed 45k times. Doesn't this fall under URLError? An easy way to discover exception types is to except Exception as e: print type e.

Assuming you can reproduce your exceptions, that is. Active Oldest Votes.To make a request use request :. You can use request to make requests using any HTTP verb:. The Request data section covers sending other kinds of requests data, including JSON, files, and binary data. JSON content can be loaded by decoding and deserializing the data attribute of the request:. The data attribute of the response is always set to a byte string representing the response content:.

Sometimes you want to use io. By default HTTP responses are closed after reading all bytes, this disables that behavior:. You can specify headers as a dictionary in the headers argument in request :.

You can send a JSON request by specifying the encoded data as the body argument and setting the Content-Type header when calling request :. For sending raw binary data simply specify the body argument. Unless otherwise specified urllib3 will try to load the default system certificate stores. You can also install certifi along with urllib3 by using the secure extra:.

See the section below for more details. Once you have certificates, you can create a PoolManager that verifies certificates when making requests:. You can use OS-provided certificates if desired. Other operating systems can be difficult. Older versions of Python 2 are built with an ssl module that lacks SNI support and can lag behind security updates.

If you install urllib3 with the secure extra, all required packages for certificate verification on Python 2 will be installed:. If you want to install the packages manually, you will need pyOpenSSLcryptographyidnaand certifi. If you are not using macOS or Windows, note that cryptography requires additional system packages to compile. See building cryptography on Linux for the list of packages required.

Once installed, you can tell urllib3 to use pyOpenSSL by using urllib3.

urllib request catch timeout

Finally, you can create a PoolManager that verifies certificates when performing requests:. If you do not wish to use pyOpenSSL, you can simply omit the call to urllib3. You may experience several warnings when doing this. If you do not use pyOpenSSL, Python must be compiled with ssl support for certificate verification to work.

It is uncommon, but it is possible to compile Python without SSL support. See this Stackoverflow thread for more details. Timeouts allow you to control how long in seconds requests are allowed to run before being aborted.

In simple cases, you can specify a timeout as a float to request :. For more granular control you can use a Timeout instance which lets you specify separate connect and read timeouts:.The urllib. Open the URL urlwhich can be either a string or a Request object.

See Request for details. The optional timeout parameter specifies a timeout in seconds for blocking operations like the connection attempt if not specified, the global default timeout setting will be used. If context is specified, it must be a ssl. More information can be found in ssl. This function always returns an object which can work as a context manager and has methods such as. HTTPResponse object slightly modified.

In addition to the three new methods above, the msg attribute contains the same information as the reason attribute — the reason phrase returned by server — instead of the response headers as it is specified in the documentation for HTTPResponse.

Raises URLError on protocol errors. Note that None may be returned if no handler handles the request though the default installed global OpenerDirector uses UnknownHandler to ensure this never happens. The legacy urllib.

urllib request catch timeout

Proxy handling, which was done by passing a dictionary parameter to urllib. The default opener raises an auditing event urllib. Request with arguments fullurldataheadersmethod taken from the request object. Changed in version 3. New in version 3. Deprecated since version 3. Please use ssl.

Install an OpenerDirector instance as the default global opener. Installing an opener is only necessary if you want urlopen to use that opener; otherwise, simply call OpenerDirector. The code does not check for a real OpenerDirectorand any class with the appropriate interface will work. Return an OpenerDirector instance, which chains the handlers in the order given.

If the Python installation has SSL support i. Convert the pathname path from the local syntax for a path to the form used in the path component of a URL. This does not produce a complete URL.

urllib request catch timeout

The return value will already be quoted using the quote function. Convert the path component path from a percent-encoded URL to the local syntax for a path. This does not accept a complete URL. This function uses unquote to decode path. This helper function returns a dictionary of scheme to proxy server URL mappings. If both lowercase and uppercase environment variables exist and disagreelowercase is preferred. Currently HTTP requests are the only ones that use data. The supported object types include bytes, file-like objects, and iterables of bytes-like objects.

It should be encoded to bytes before being used as the data parameter. An appropriate Content-Type header should be included if the data argument is present. It defaults to http. This is the host name or IP address of the original request that was initiated by the user. For example, if the request is for an image in an HTML document, this should be the request-host of the request for the page containing the image.


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