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authorAndy Williams <andy@andywilliams.me>2017-11-22 11:41:55 +0000
committerAndy Williams <andy@andywilliams.me>2017-11-22 11:41:55 +0000
commit8035919a325199a17cda669ca2630a8239051b48 (patch)
tree5924d76c4cf467efc1263d99f35789cc0b78083f /reference
parentcore: Add mising summary (diff)
downloadexamples-8035919a325199a17cda669ca2630a8239051b48.tar.gz
net: Add a simple net_io example simulating an HTTP client
We connect to a remote host and execute a HEAD request and print the response
Diffstat (limited to 'reference')
-rw-r--r--reference/c/net/meson.build12
-rw-r--r--reference/c/net/src/meson.build9
-rw-r--r--reference/c/net/src/net_io.c258
3 files changed, 279 insertions, 0 deletions
diff --git a/reference/c/net/meson.build b/reference/c/net/meson.build
new file mode 100644
index 00000000..fb6533aa
--- /dev/null
+++ b/reference/c/net/meson.build
@@ -0,0 +1,12 @@
+project(
+ 'efl-reference-net', 'c',
+ version : '0.0.1',
+ default_options: [ 'c_std=gnu99', 'warning_level=2' ],
+ meson_version : '>= 0.38.0')
+
+eina = dependency('eina', version : '>=1.20.99')
+efl = dependency('efl-net', version : '>=1.20.99')
+
+inc = include_directories('.')
+subdir('src')
+
diff --git a/reference/c/net/src/meson.build b/reference/c/net/src/meson.build
new file mode 100644
index 00000000..203a1cd2
--- /dev/null
+++ b/reference/c/net/src/meson.build
@@ -0,0 +1,9 @@
+deps = [eina, efl]
+
+executable('efl_reference_net_io',
+ files(['net_io.c']),
+ dependencies : deps,
+ include_directories : inc,
+ install : true
+)
+
diff --git a/reference/c/net/src/net_io.c b/reference/c/net/src/net_io.c
new file mode 100644
index 00000000..bfab3536
--- /dev/null
+++ b/reference/c/net/src/net_io.c
@@ -0,0 +1,258 @@
+#define EFL_EO_API_SUPPORT 1
+#define EFL_BETA_API_SUPPORT 1
+
+#include <stdio.h>
+
+#include <Eina.h>
+#include <Efl_Net.h>
+
+/*
+ * Efl.IO Networked examples.
+ *
+ * This example builds on the core_io example by connecting to a remote server
+ * using a dialler and a command queue.The response is printed to stdout.
+ */
+
+static Eina_List *_waiting = NULL;
+static Eina_List *_commands = NULL;
+static Eina_Slice _delimiter;
+static Eo *_dialer = NULL, *_sender = NULL, *_receiver = NULL;
+
+static void
+_command_next(void)
+{
+ Eina_Slice slice;
+ char *cmd;
+ Eo *send_queue;
+
+ send_queue = efl_io_copier_source_get(_sender);
+ if (!_commands)
+ {
+ efl_io_queue_eos_mark(send_queue);
+ return;
+ }
+
+ cmd = _commands->data;
+ _commands = eina_list_remove_list(_commands, _commands);
+
+ slice = (Eina_Slice)EINA_SLICE_STR(cmd);
+ efl_io_writer_write(send_queue, &slice, NULL);
+ fprintf(stderr, "INFO: sent '" EINA_SLICE_STR_FMT "'\n",
+ EINA_SLICE_STR_PRINT(slice));
+
+ /* don't use _delimiter directly, 'len' may be changed! */
+ slice = _delimiter;
+ efl_io_writer_write(send_queue, &slice, NULL);
+}
+
+static void
+_receiver_data(void *data EINA_UNUSED, const Efl_Event *event)
+{
+ Eina_Slice slice = efl_io_queue_slice_get(event->object);
+
+ // Can be caused when we issue efl_io_queue_clear()
+ if (slice.len == 0) return;
+
+ /*
+ * If the server didn't send us the line terminator and closed the
+ * connection (ie: efl_io_reader_eos_get() == true) or if the buffer
+ * limit was reached then we may have a line without a trailing delimiter.
+ */
+ if (eina_slice_endswith(slice, _delimiter))
+ slice.len -= _delimiter.len;
+
+ fprintf(stderr, "INFO: received '" EINA_SLICE_STR_FMT "'\n",
+ EINA_SLICE_STR_PRINT(slice));
+
+ efl_io_queue_clear(event->object);
+ _command_next();
+}
+
+static void
+_dialer_connected(void *data EINA_UNUSED, const Efl_Event *event)
+{
+ fprintf(stderr, "INFO: connected to %s (%s)\n",
+ efl_net_dialer_address_dial_get(event->object),
+ efl_net_socket_address_remote_get(event->object));
+
+ _command_next();
+}
+
+static void
+_copier_done(void *data EINA_UNUSED, const Efl_Event *event)
+{
+ fprintf(stderr, "INFO: %s done\n", efl_name_get(event->object));
+
+ _waiting = eina_list_remove(_waiting, event->object);
+ if (!_waiting)
+ efl_exit(EXIT_SUCCESS);
+}
+
+static void
+_copier_error(void *data EINA_UNUSED, const Efl_Event *event)
+{
+ const Eina_Error *perr = event->info;
+
+ fprintf(stderr, "INFO: %s error: #%d '%s'\n",
+ efl_name_get(event->object), *perr, eina_error_msg_get(*perr));
+
+ efl_exit(EXIT_FAILURE);
+}
+
+EFL_CALLBACKS_ARRAY_DEFINE(copier_cbs,
+ { EFL_IO_COPIER_EVENT_DONE, _copier_done },
+ { EFL_IO_COPIER_EVENT_ERROR, _copier_error });
+
+EAPI void
+efl_pause(void *data EINA_UNUSED, const Efl_Event *ev EINA_UNUSED)
+{
+}
+
+EAPI void
+efl_resume(void *data EINA_UNUSED, const Efl_Event *ev EINA_UNUSED)
+{
+}
+
+EAPI void
+efl_terminate(void *data EINA_UNUSED, const Efl_Event *ev EINA_UNUSED)
+{
+ if (_waiting)
+ {
+ fprintf(stderr, "ERROR: %d operations were waiting!\n",
+ eina_list_count(_waiting));
+ eina_list_free(_waiting);
+ _waiting = NULL;
+ }
+
+ if (_receiver)
+ {
+ efl_io_closer_close(_receiver);
+ efl_del(efl_io_copier_destination_get(_receiver));
+ efl_del(_receiver);
+ }
+
+ if (_sender)
+ {
+ efl_io_closer_close(_sender);
+ efl_del(efl_io_copier_source_get(_sender));
+ efl_del(_sender);
+ }
+
+ if (_dialer)
+ efl_del(_dialer);
+}
+
+EAPI_MAIN void
+efl_main(void *data EINA_UNUSED, const Efl_Event *ev EINA_UNUSED)
+{
+ char *address = "example.com:80";
+ unsigned long buffer_limit = 128;
+ Eina_Error err;
+ Eo *loop, *send_queue, *receive_queue;
+
+ _commands = eina_list_append(_commands, "HEAD / HTTP/1.1\r\nHost: example.com\r\nConnection: close\r\n\r\n");
+ _delimiter = (Eina_Slice)EINA_SLICE_STR("\r\n");
+
+ /*
+ * Without a send_queue we'd have to manually implement an
+ * Efl_Io_Reader object that would provide partial data when
+ * Efl_Io_Reader.read() is called by Efl_Io_Copier. This is
+ * cumbersome... we just want to write a full command and have the
+ * queue to handle that for us.
+ *
+ * Our example's usage is to write each command at once followed by
+ * the line_delimiter, then wait for a reply from the server, then
+ * write another.
+ */
+ send_queue = efl_add(EFL_IO_QUEUE_CLASS, NULL,
+ efl_name_set(efl_added, "send_queue"),
+ efl_io_queue_limit_set(efl_added, buffer_limit));
+ if (!send_queue)
+ {
+ fprintf(stderr, "ERROR: could not create Efl_Io_Queue (send)\n");
+ efl_exit(EXIT_FAILURE);
+ }
+
+ /*
+ * Without a receive_queue we'd have to manually implement an
+ * Efl_Io_Writer object that would handle write of partial data
+ * with Efl_Io_Writer.write() is called by Efl_Io_Copier.
+ *
+ * For output we could have another solution as well: use NULL
+ * destination and handle "line" or "data" events manually,
+ * stealing the buffer so it doesn't grow.
+ *
+ * Our example's usage is to peek its data with slice_get() then
+ * clear().
+ */
+ receive_queue = efl_add(EFL_IO_QUEUE_CLASS, NULL,
+ efl_name_set(efl_added, "receive_queue"),
+ efl_io_queue_limit_set(efl_added, buffer_limit),
+ efl_event_callback_add(efl_added, EFL_IO_QUEUE_EVENT_SLICE_CHANGED, _receiver_data, NULL));
+ if (!receive_queue)
+ {
+ fprintf(stderr, "ERROR: could not create Efl_Io_Queue (receive)\n");
+ efl_exit(EXIT_FAILURE);
+ }
+
+ /*
+ * From here on it's mostly the same all Efl_Io_Copier would do,
+ * check efl_io_copier_simple_example.c and efl_io_copier_example.c
+ */
+
+ /*
+ * some objects such as the Efl.Io.Copier and Efl.Net.Dialer.Tcp
+ * depend on main loop, thus their parent must be a loop
+ * provider. We use the loop itself.
+ */
+ loop = ecore_main_loop_get();
+
+ /* The TCP client to use to send/receive network data */
+ _dialer = efl_add(EFL_NET_DIALER_TCP_CLASS, loop,
+ efl_name_set(efl_added, "dialer"),
+ efl_event_callback_add(efl_added, EFL_NET_DIALER_EVENT_CONNECTED, _dialer_connected, NULL));
+ if (!_dialer)
+ {
+ fprintf(stderr, "ERROR: could not create Efl_Net_Dialer_Tcp\n");
+ efl_exit(EXIT_FAILURE);
+ }
+
+ /* sender: send_queue->network */
+ _sender = efl_add(EFL_IO_COPIER_CLASS, loop,
+ efl_name_set(efl_added, "sender"),
+ efl_io_copier_line_delimiter_set(efl_added, _delimiter),
+ efl_io_copier_source_set(efl_added, send_queue),
+ efl_io_copier_destination_set(efl_added, _dialer),
+ efl_event_callback_array_add(efl_added, copier_cbs(), NULL));
+ if (!_sender)
+ {
+ fprintf(stderr, "ERROR: could not create Efl_Io_Copier (sender)\n");
+ efl_exit(EXIT_FAILURE);
+ }
+
+ /* receiver: network->receive_queue */
+ _receiver = efl_add(EFL_IO_COPIER_CLASS, loop,
+ efl_name_set(efl_added, "receiver"),
+ efl_io_copier_line_delimiter_set(efl_added, _delimiter),
+ efl_io_copier_source_set(efl_added, _dialer),
+ efl_io_copier_destination_set(efl_added, receive_queue),
+ efl_event_callback_array_add(efl_added, copier_cbs(), NULL));
+ if (!_receiver)
+ {
+ fprintf(stderr, "ERROR: could not create Efl_Io_Copier (receiver)\n");
+ efl_exit(EXIT_FAILURE);
+ }
+
+ err = efl_net_dialer_dial(_dialer, address);
+ if (err)
+ {
+ fprintf(stderr, "ERROR: could not dial %s: %s\n",
+ address, eina_error_msg_get(err));
+ efl_exit(EXIT_FAILURE);
+ }
+
+ _waiting = eina_list_append(_waiting, _sender);
+ _waiting = eina_list_append(_waiting, _receiver);
+}
+EFL_MAIN_EX()
+