HTTP网络通讯类SoupMessage

      在GLib下的libsoup库为HTTP网路通讯提供了支持。网路通讯一般包含两方面的内容，即HTTP信息的发送和接收。

 

作为客户端，我们可以使用soup_message_new() 或者soup_message_new_from_uri() 函数来获取信息。

SoupMessage *       soup_message_new                    (const char *method,
                                                         const char *uri_string);

 

对于服务端，SoupServer 会自动的为传进来的request请求建立SoupMessage .

 

我们来看一下SoupMessage的结构体，包括：请求类型，返回状态，服务器返回值，request信息，response信息

 

typedef struct {
	const char         *method;

	guint               status_code;
	char               *reason_phrase;

	SoupMessageBody    *request_body;
	SoupMessageHeaders *request_headers;

	SoupMessageBody    *response_body;
	SoupMessageHeaders *response_headers;
} SoupMessage;

 

服务端建立服务：

  SoupSession *session;
  SoupServer *server;

  session = soup_session_async_new ();

  server = soup_server_new (NULL);
  soup_server_add_handler (server, NULL, server_callback, NULL, NULL);
  soup_server_run_async (server);

  char *url = g_strdup_printf ("http://localhost:%d/", soup_server_get_port (server));

 

设置服务处理函数：

static void
server_callback (SoupServer *server, SoupMessage *msg,
                 const char *path, GHashTable *query,
                 SoupClientContext *client, gpointer user_data)
{
  if (g_str_equal (path, "/ping")) {
    soup_message_set_status (msg, SOUP_STATUS_OK);
  }
  else if (g_str_equal (path, "/echo")) {
    const char *value;

    value = g_hash_table_lookup (query, "value");
    soup_message_set_response (msg, "text/plain", SOUP_MEMORY_COPY,
                               value, strlen (value));
    soup_message_set_status (msg, SOUP_STATUS_OK);
  }
  else if (g_str_equal (path, "/reverse")) {
    char *value;

    value = g_strdup (g_hash_table_lookup (query, "value"));
    g_strreverse (value);

    soup_message_set_response (msg, "text/plain", SOUP_MEMORY_TAKE,
                               value, strlen (value));
    soup_message_set_status (msg, SOUP_STATUS_OK);
  }
  else if (g_str_equal (path, "/status")) {
    const char *value;
    int status;

    value = g_hash_table_lookup (query, "status");
    if (value) {
      status = atoi (value);
      soup_message_set_status (msg, status ?: SOUP_STATUS_INTERNAL_SERVER_ERROR);
    }
  }
  else if (g_str_equal (path, "/useragent/none")) {
    if (soup_message_headers_get (msg->request_headers, "User-Agent") == NULL) {
      soup_message_set_status (msg, SOUP_STATUS_OK);
    } else {
      soup_message_set_status (msg, SOUP_STATUS_EXPECTATION_FAILED);
    }
  }
  else if (g_str_equal (path, "/useragent/testsuite")) {
    const char *value;
    value = soup_message_headers_get (msg->request_headers, "User-Agent");
    if (g_strcmp0 (value, "TestSuite-1.0") == 0) {
      soup_message_set_status (msg, SOUP_STATUS_OK);
    } else {
      soup_message_set_status (msg, SOUP_STATUS_EXPECTATION_FAILED);
    }
  }
}

 

客户端发送请求：

url = g_strdup ("%s/%s", url, "echo");
gchar *method = g_strdup ("GET");

SoupMessage *message = soup_message_new (method, url);

  if (message->status_code >= 200 && message->status_code < 300)
  {
    g_message ("message call success, value is %s\n",message->response_body->data);
    return TRUE;
  }else{    
    g_message ("message call failed\n");
    return FALSE;
 }