Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Couldn't you check the http response code using httplib. If it was 200 then the page is valid, if it is anything else (like 404) or an error then it is invalid. </p> <p>See this question: <a href="https://stackoverflow.com/questions/1140661/python-get-http-response-code-from-a-url">What’s the best way to get an HTTP response code from a URL?</a></p> <h2>Update:</h2> <p>Based on your comment it looks like your issue is how you are handling the error. You are only handling IOError issues. In your case you can either handle all errors singularly by switching to: </p> <pre><code>except: return index() </code></pre> <p>You could also build your own exception handler by overriding http_default_error. See <a href="https://stackoverflow.com/questions/1308542/how-to-catch-404-error-in-urllib-urlretrieve">How to catch 404 error in urllib.urlretrieve</a> for more information.</p> <p>Or you can switch to urllib2 which has specific errors, You can then handle the specific errors that urllib2 throws like this:</p> <pre><code>from urllib2 import Request, urlopen, URLError req = Request('http://jfvbhsjdfvbs.com') try: response = urlopen(req) except URLError, e: if hasattr(e, 'reason'): print 'We failed to reach a server.' print 'Reason: ', e.reason elif hasattr(e, 'code'): print 'The server couldn\'t fulfill the request.' print 'Error code: ', e.code else: print 'URL is good!' </code></pre> <p>The above code with that will return:</p> <pre><code>We failed to reach a server. Reason: [Errno 61] Connection refused </code></pre> <p>The specifics of each exception class is contained in the urllib.error api documentation.</p> <p>I am not exactly sure how to slot this into your code, because I am not sure exactly what you are trying to do, but IOError is not going to handle the exceptions thrown by urllib.</p>
    singulars
    1. This table or related slice is empty.
    1. POweb2py url validator
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USCommunity
    1. USBigHandsome
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POweb2py url validator
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COjust tell me plz what is this error occurs in my code?
      singulars
      1. PO
      1. USHojat Taheri
    2. COdef md5(): url = request.vars.url conn = httplib.HTTPConnection(url) try: conn.request("HEAD", "/") return dict(rand_url = ''.join(random.choice(string.ascii_uppercase + string.digits + string.ascii_lowercase) for x in range(6)), input_url=url) except StandardError: print "invalid URL" . . . . gaierror: (11004, 'getaddrinfo failed')
      singulars
      1. PO
      1. USHojat Taheri
    3. COthanks, but the problem is web2py is full compatible with python 2.5, and i heard that python 2.5 only has urllib, is it possible to use urllib2 in python 2.5?
      singulars
      1. PO
      1. USHojat Taheri
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload