149 lines
4.9 KiB
ReStructuredText
149 lines
4.9 KiB
ReStructuredText
.. _http-client-sample:
|
|
|
|
HTTP Client
|
|
###########
|
|
|
|
Overview
|
|
********
|
|
|
|
This sample application shows how to create HTTP 1.1 requests to
|
|
an HTTP server and how to parse the incoming responses.
|
|
Supported HTTP 1.1 methods are: GET, HEAD and POST.
|
|
|
|
The source code for this sample application can be found at:
|
|
:file:`samples/net/http_client`.
|
|
|
|
Requirements
|
|
************
|
|
|
|
- :ref:`networking_with_qemu`
|
|
- Terminal emulator software
|
|
- HTTP Server
|
|
- DNS server (optional)
|
|
|
|
|
|
Building and Running
|
|
********************
|
|
|
|
Open the project configuration file for your platform, for example:
|
|
:file:`prj_qemu_x86.conf` is the configuration file for QEMU.
|
|
|
|
To use QEMU for testing, follow the :ref:`networking_with_qemu` guide.
|
|
|
|
For IPv4 networks, set the following variables:
|
|
|
|
.. code-block:: console
|
|
|
|
CONFIG_NET_IPV4=y
|
|
CONFIG_NET_IPV6=n
|
|
|
|
IPv6 is the preferred routing technology for this sample application,
|
|
if CONFIG_NET_IPV6=y is set, the value of CONFIG_NET_IPV4=y is ignored.
|
|
|
|
In this sample application, both static IP addresses and DHCPv4 are supported.
|
|
Static IP addresses are specified in the project configuration file,
|
|
for example:
|
|
|
|
.. code-block:: console
|
|
|
|
CONFIG_NET_APP_MY_IPV6_ADDR="2001:db8::1"
|
|
CONFIG_NET_APP_PEER_IPV6_ADDR="2001:db8::2"
|
|
|
|
are the IPv6 addresses for the HTTP client running Zephyr and the
|
|
HTTP server, respectively. The application also supports DNS resolving so the
|
|
peer address is resolved automatically if host name is given, so you
|
|
can also write the HTTP server name like this:
|
|
|
|
.. code-block:: console
|
|
|
|
CONFIG_NET_APP_MY_IPV6_ADDR="2001:db8::1"
|
|
CONFIG_NET_APP_PEER_IPV6_ADDR="6.zephyr.test"
|
|
|
|
Open the :file:`src/config.h` file and set the server port
|
|
to match the HTTP server setup, for example:
|
|
|
|
.. code-block:: c
|
|
|
|
#define SERVER_PORT 8000
|
|
|
|
assumes that the HTTP server is listening at the TCP port 8000.
|
|
|
|
HTTP Server
|
|
===========
|
|
|
|
Sample code for a very simple HTTP server can be downloaded from the
|
|
zephyrproject-rtos/net-tools project area:
|
|
https://github.com/zephyrproject-rtos/net-tools
|
|
|
|
Open a terminal window and type:
|
|
|
|
.. code-block:: console
|
|
|
|
$ cd net-tools
|
|
$ ./http-server.sh
|
|
|
|
|
|
DNS setup
|
|
=========
|
|
|
|
The net-tools project provides a simple DNS resolver. You can activate
|
|
it like this if you want to test the DNS resolving with HTTP client.
|
|
|
|
Open a terminal window and type:
|
|
|
|
.. code-block:: console
|
|
|
|
$ cd net-tools
|
|
$ ./dnsmasq.sh
|
|
|
|
|
|
Sample Output
|
|
=============
|
|
|
|
This sample application loops a specified number of times doing several
|
|
HTTP 1.1 requests and printing some output. The requests are:
|
|
|
|
- GET "/index.html"
|
|
- HEAD "/"
|
|
- POST "/post_test.php"
|
|
- GET "/big-file.html"
|
|
|
|
The terminal window where QEMU is running will show something similar
|
|
to the following:
|
|
|
|
.. code-block:: console
|
|
|
|
[http-client] [INF] do_sync_http_req: [19] Send /index.html
|
|
[http-client] [INF] do_sync_http_req: HTTP server response status: OK
|
|
[http-client] [INF] do_sync_http_req: HTTP body: 170 bytes, expected: 170 bytes
|
|
[http-client] [INF] do_sync_http_req: [19] Send /
|
|
[http-client] [INF] do_sync_http_req: HTTP server response status: OK
|
|
[http-client] [INF] do_sync_http_req: [19] Send /post_test.php
|
|
[http-client] [INF] do_sync_http_req: HTTP server response status: OK
|
|
[http-client] [INF] do_sync_http_req: HTTP body: 24 bytes, expected: 24 bytes
|
|
[http-client] [INF] do_sync_http_req: [20] Send /index.html
|
|
[http-client] [INF] do_sync_http_req: HTTP server response status: OK
|
|
[http-client] [INF] do_sync_http_req: HTTP body: 170 bytes, expected: 170 bytes
|
|
[http-client] [INF] do_sync_http_req: [20] Send /
|
|
[http-client] [INF] do_sync_http_req: HTTP server response status: OK
|
|
[http-client] [INF] do_sync_http_req: [20] Send /post_test.php
|
|
[http-client] [INF] do_sync_http_req: HTTP server response status: OK
|
|
[http-client] [INF] do_sync_http_req: HTTP body: 24 bytes, expected: 24 bytes
|
|
[http-client] [INF] main: --------Sending 20 async request--------
|
|
[http-client] [INF] do_async_http_req: [1] Send /index.html
|
|
[http-client] [INF] response: Received 356 bytes piece of data
|
|
[http-client] [INF] response: HTTP server response status: OK
|
|
[http-client] [INF] response: HTTP body: 170 bytes, expected: 170 bytes
|
|
[http-client] [INF] do_async_http_req: [1] Send /
|
|
[http-client] [INF] response: HTTP server response status: OK
|
|
[http-client] [INF] do_async_http_req: [1] Send /post_test.php
|
|
[http-client] [INF] response: Received 163 bytes piece of data
|
|
[http-client] [INF] response: HTTP server response status: OK
|
|
[http-client] [INF] response: HTTP body: 24 bytes, expected: 24 bytes
|
|
[http-client] [INF] do_async_http_req: [1] Send /big-file.html
|
|
[http-client] [INF] response: Received 657 bytes piece of data
|
|
[http-client] [INF] response: Received 640 bytes piece of data
|
|
[http-client] [INF] response: Received 418 bytes piece of data
|
|
[http-client] [INF] response: HTTP server response status: OK
|
|
[http-client] [INF] response: HTTP body: 1528 bytes, expected: 1528 bytes
|