Socket Dumb HTTP Server¶
The sockets/dumb_http_server sample application for Zephyr implements a skeleton HTTP server using a BSD Sockets compatible API. The purpose of this sample is to show how it’s possible to develop a sockets application portable to both POSIX and Zephyr. As such, this HTTP server example is kept very minimal and does not really parse an incoming HTTP request, just reads and discards it, and always serve a single static page. Even with such simplification, it is useful as an example of a socket application which can be accessed via a conventional web browser, or to perform performance/regression testing using existing HTTP diagnostic tools.
The source code for this sample application can be found at: samples/net/sockets/dumb_http_server.
Building and Running¶
Build the Zephyr version of the sockets/echo application like this:
# On Linux/macOS cd $ZEPHYR_BASE/samples/net/sockets/dumb_http_server mkdir build && cd build # On Windows cd %ZEPHYR_BASE%\samples\net\sockets\dumb_http_server mkdir build & cd build cmake -GNinja -DBOARD=<board_to_use> .. ninja
board_to_use defaults to
qemu_x86. In this case, you can run the
application in QEMU using
make run. If you used another BOARD, you
will need to consult its documentation for application deployment
instructions. You can read about Zephyr support for specific boards in
the documentation at Supported Boards.
After the sample starts, it expects connections at 192.0.2.1, port 8080.
The easiest way to connect is by opening a following URL in a web
browser: http://192.0.2.1:8080/ . You should see a page with a sample
content about Zephyr (captured at a particular time from Zephyr’s web
site, note that it may differ from the content on the live Zephyr site).
Alternatively, a tool like
curl can be used:
$ curl http://192.0.2.1:8080/
Finally, you can run an HTTP profiling/load tool like Apache Bench
ab) against the server:
$ ab -n10 http://192.0.2.1:8080/
-n parameter specifies the number of HTTP requests to issue against
Running application on POSIX Host¶
The same application source code can be built for a POSIX system, e.g. Linux. (Note: if you look at the source, you will see that the code is the same except the header files are different for Zephyr vs POSIX.)
To build for a host POSIX OS:
$ make -f Makefile.posix
To test, connect to http://127.0.0.1:8080/ , and follow the steps in the previous section.
As can be seen, the behavior of the application is the same as the Zephyr version.