Contents
This sample demonstrates how to use the StreamBase HTTP Reader Adapter.
Note
The adapter uses the libpcap (Linux) and WinPcap (Windows) libraries to tap into the IP packet stream. Before
using this adapter with realtime data, you must install and configure these libraries
on the system that will host the IRC Reader adapter. Locate libpcap at http://www.tcpdump.org/ and
WinPcap at http://www.winpcap.org.
In StreamBase Studio, import this sample with the following steps:
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From the top menu, click → .
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Select this sample from the Embedded Input Adapters list.
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Click OK.
StreamBase Studio creates a single project containing the sample files.
By default, the sample files are installed in:
- On Windows
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C:\Program Files\StreamBase Systems\StreamBase.n.m\sample\adapter\embedded\ip\httpreader\ - On UNIX
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/opt/streambase/sample/adapter/embedded/ip/httpreader/
When you load the sample into StreamBase Studio, Studio copies the
sample project's files to your Studio workspace. StreamBase Systems
recommends that you use the workspace copy of the sample, especially on UNIX, where
you may not have write access to /opt/streambase. In
the default installation, the path to this sample in your Studio workspace is:
UNIX: ~/streambase-studio-n.m-workspace/sample_adapter_embedded_ip_httpreader Windows XP: C:\Documents and Settings\username\My Documents\StreamBase Studion.mWorkspace\ sample_adapter_embedded_ip_httpreader Windows Vista: C:\Users\username\Documents\StreamBase Studion.mWorkspace\ sample_adapter_embedded_ip_httpreader
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In the Package Explorer, double-click to open the
httpReader.sbappapplication. Make sure the application is the currently active tab in the EventFlow Editor. -
Click the
Run
StreamBase Application (Default Launch) button. (Not the Run button.) This opens the SB Test/Debug perspective and
starts the application.
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Use a web browser to generate traffic on HTTP port 80.
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In the Application Output view, observe that one or more tuples is emitted through the HTTPReaderOutput stream.
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When done, press F9 or click the
Stop Running Application button.
This section describes how to run the sample in UNIX terminal windows or Windows command prompt windows. On Windows, be sure to use the StreamBase Command Prompt from the Start menu as described in the Test/Debug Guide, not the default command prompt.
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Open two terminal windows on UNIX, or two StreamBase Command Prompts on Windows. In each window, navigate to the directory where the sample is installed, or to your workspace copy of the sample, as described above.
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In window 1, type:
sbd httpReader.sbapp. -
In window 2, start a dequeuer by typing:
sbc dequeue HTTPReaderOutput. -
Use a web browser to generate traffic on HTTP port 80.
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One or more tuples representing the HTTP request and response messages appear in the dequeuer terminal.
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In window 2, type: Ctrl-C to exit the sbc session.
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In window 2, type the following command to terminate the server:
sbadmin shutdown
