system.net.httpGet

This function is used in Python Scripting.

Description

Retrieves the document at the given URL using the HTTP GET protocol. The document is returned as a string. For example, if you use the URL of a website, you'll get the same thing you'd get by going to that website in a browser and using the browser's "View Source" function.

Keep in mind that JRE proxy settings will influence how these functions conduct their network activities.

Client Permission Restrictions

This scripting function has no Client Permission restrictions.

Syntax

system.net.httpGet(url, connectTimeout, readTimeout, username, password, headerValues, bypassCertValidation, useCaches, throwOnError)

Parameters

Type	Parameter	Description
String	url	The URL to retrieve.
Integer	connectTimeout	The timeout for connecting to the URL. In milliseconds. Default is 10,000. [optional]
Integer	readTimeout	The read timeout for the get operation. In milliseconds. Default is 60,000. [optional]
String	username	If specified, the call will attempt to authenticate with basic HTTP authentication. [optional]
String	password	The password used for basic HTTP authentication, if the username parameter is also present. [optional]
Dictionary[String, String]	headerValues	A dictionary of name/value pairs that will be set in the HTTP header. [optional]
Boolean	bypassCertValidation	If the target address is an HTTPS address, and this parameter is true, the system will bypass all SSL certificate validation. This is not recommended, though is sometimes necessary for self-signed certificates. [optional]
Boolean	useCaches	Will cache the information returned by the httpGet call. If using this for something that constantly updates like an RSS feed, it would be better to set this to False. Default is True. [optional]
Boolean	throwOnError	Set to False if you wish to get the error body rather than a Python exception if the GET request returns an error code (non-200 responsive). Default is True. [optional]

Returns

String - The content found at the given URL.

Scope

Gateway, Vision Client, Perspective Session

Code Examples

If you are using JSON, check out the system.util.jsonEncode and system.util.jsonDecode.

Example #1

# This code would return the source for Google's homepage
source = system.net.httpGet("http://www.google.com")
print source

Example #2 - Getting Weather Information

# This code would query Yahoo Weather for the temperature in Sacramento, CA
# and then find the current temperature using a regular expression
  
response = system.net.httpGet("https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20weather.forecast%20where%20woeid%3D2489314")
  
# import Python's regular expression library
import re
  
# NOTE - if you've never seen regular expressions before, don't worry, they look
# confusing even to people who use them frequently.
pattern = re.compile('.*?<yweather:condition (.*?)/>', re.DOTALL)
match = pattern.match(response)
if match:
   subText = match.group(1)
   condition = re.compile('.*?text="(.*?)"').match(subText).group(1)
   temp = re.compile('.*?temp="(.*?)"').match(subText).group(1)
   print "Condition: ", condition
   print "Temperature (F): ", temp
else:
   print 'Weather service format changed'