# httpGet **URL:** \ **Category:** Ignition\ **Created:** [February 19, 2010, 2:08pm UTC](https://forum.inductiveautomation.com/t/httpget/1553 "2010-02-19T14:08:07Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![david\_mccutchen](https://avatars.discourse-cdn.com/v4/letter/d/919ad9/32.png) [@david\_mccutchen](https://forum.inductiveautomation.com/u/david_mccutchen)\ **Post date:** [February 19, 2010, 2:08pm UTC](https://forum.inductiveautomation.com/t/httpget/1553/1 "2010-02-19T14:08:07Z")
In FPMI I have the following code which works well. It gives an I/O error in Ignition. [code]#screen scrape from the gateway to get a list of the FactoryPMI datasources if event.propertyName == “ListInit”: address = system.util.getGatewayAddress() source = system.net.httpGet(“http://%s/gateway/Gateway?tab=datasources” % address) findStr = “Datasource '`” endFindStr = “`’” ``` Headers = ["DataSource"] Names = [] pos = source.find(findStr) while pos != -1: pos2 = source.find(endFindStr) #save it to a dataset print source[pos+18:pos2] Names.append([source[pos+18:pos2]]) source = source[pos2+8:] pos = source.find(findStr) event.source.data = system.dataset.toDataSet(Headers, Names)[/code] ``` Error: [code]Traceback (innermost last): File “event:propertyChange”, line 4, in ? IOError: http ``` at org.python.core.Py.IOError(Py.java) at com.inductiveautomation.ignition.common.script.builtin.AbstractNetUtilities.httpGet(AbstractNetUtilities.java:157) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.python.core.PyReflectedFunction. __call__ (PyReflectedFunction.java) at com.inductiveautomation.ignition.common.script.ScriptManager$ReflectedInstanceFunction. __call__ (ScriptManager.java:286) at org.python.core.PyObject. __call__ (PyObject.java) at org.python.core.PyObject.invoke(PyObject.java) at org.python.pycode._pyx61.f$0(:4) at org.python.pycode._pyx61.call_function() at org.python.core.PyTableCode.call(PyTableCode.java) at org.python.core.PyCode.call(PyCode.java) at org.python.core.Py.runCode(Py.java) at com.inductiveautomation.ignition.common.script.ScriptManager.runCode(ScriptManager.java:367) at com.inductiveautomation.factorypmi.application.binding.action.ActionAdapter.runActions(ActionAdapter.java:138) at com.inductiveautomation.factorypmi.application.binding.action.ActionAdapter.invoke(ActionAdapter.java:280) at com.inductiveautomation.factorypmi.application.binding.action.RelayInvocationHandler.invoke(RelayInvocationHandler.java:55) at $Proxy1.propertyChange(Unknown Source) at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source) at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source) at java.awt.Component.firePropertyChange(Unknown Source) at com.inductiveautomation.factorypmi.application.components.PMIComboBox.fireDynChange(PMIComboBox.java:872) at com.inductiveautomation.factorypmi.application.binding.util.DynamicPropertyUtil.setPropertyValue(DynamicPropertyUtil.java:217) at com.inductiveautomation.factorypmi.application.components.PMIComboBox.setPropertyValue(PMIComboBox.java:860) at com.inductiveautomation.factorypmi.application.binding.AbstractPropertyAdapter.updateTarget(AbstractPropertyAdapter.java:111) at com.inductiveautomation.factorypmi.application.binding.SQLPropertyAdapter.propertyChange(SQLPropertyAdapter.java:208) at com.inductiveautomation.factorypmi.application.gateway.QueryManager$PropertyChangeUpdater.run(QueryManager.java:501) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) ``` Ignition v7.0.2 (b4482) Java: Sun Microsystems Inc. 1.6.0\_18 [/code] ---
**Author:** ![Carl.Gould](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/carl.gould/32/7262_2.png) [@Carl.Gould](https://forum.inductiveautomation.com/u/Carl.Gould)\ **Post date:** [February 19, 2010, 6:23pm UTC](https://forum.inductiveautomation.com/t/httpget/1553/2 "2010-02-19T18:23:02Z")
Looks like you’re porting over a Click-to-chart setup. There are a few things going on here. None of them have to do with the httpGet function. 1. system.util.getGatewayAddress() returns a different format than in FactoryPMI. Notably, it returns the “http://” directly, so the address you’re feeding httpGet is like “[http://http](http://http)://192.168…(etc)” 2. Even after you fixed that, it wouldn’t work. This method is “screen-scraping” the gateway webpage to get a list of all datasources. The Gateway’s web interface has changed a bit (to put it mildly) from FactoryPMI to Ignition - this will no longer work. 3. Because of exactly this problem, 7.0.3 which is coming out later today has a system.db.getConnections() function. ---
**Author:** ![david\_mccutchen](https://avatars.discourse-cdn.com/v4/letter/d/919ad9/32.png) [@david\_mccutchen](https://forum.inductiveautomation.com/u/david_mccutchen)\ **Post date:** [February 22, 2010, 12:35pm UTC](https://forum.inductiveautomation.com/t/httpget/1553/3 "2010-02-22T12:35:47Z")
I went ahead and change this to a query to get the info I needed. ---
**Author:** ![Carl.Gould](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/carl.gould/32/7262_2.png) [@Carl.Gould](https://forum.inductiveautomation.com/u/Carl.Gould)\ **Post date:** [February 22, 2010, 7:11pm UTC](https://forum.inductiveautomation.com/t/httpget/1553/4 "2010-02-22T19:11:33Z")
Ok, you might want to change it to use the getConnections() call, because we don’t guarantee screen-scraping backwards compatibility.