network/http_server/requests/get_params.c

extern bool led_value;

gos_result_t get_params_request(const gos_hs_request_t *request, const char *arg)

{

gos_result_t result;

char buffer[256];

bool value;

const gos_hs_param_t *msg_param = gos_hs_request_get_param(request, "msg");

const gos_hs_param_t *light_param = gos_hs_request_get_param(request, "light");

const gos_hs_param_t *reval_param = gos_hs_request_get_param(request, "retval");

if (msg_param == NULL)

{

return return_error(request, "'msg' variable not found");

}

if (light_param == NULL)

{

return return_error(request, "'light' variable not found");

}

if (reval_param == NULL)

{

return return_error(request, "'retval' variable not found");

}

if (str_parse_bool(light_param->value, &value) != GOS_SUCCESS)

{

snprintf(buffer, sizeof(buffer), "<h1>Bad Request</h1>Bad 'light' value: %s", light_param->value);

return return_error(request, buffer);

}

led_value = value;

gos_gpio_set(PLATFORM_STD_LED, led_value ? PLATFORM_LED_ACTIVE_STATE : !PLATFORM_LED_ACTIVE_STATE);

GOS_LOG("New LED value: %d", led_value);

GOS_LOG("Message: %s", msg_param->value);

int len = sprintf(buffer, "<h3>LED value: %d</h3>Retval: %s", led_value, reval_param->value);

if (GOS_FAILED(result, gos_hs_write_reply_header(request, "text/html", len, GOS_HS_RESPONSE_FLAG_NONE)))

{

}

else if (GOS_FAILED(result, gos_hs_write_data(request, buffer, len, true)))

{

}

return result;

}

static gos_result_t return_error(const gos_hs_request_t *request, const char *msg)

{

char buffer[512];

char *ptr = buffer;

ptr += sprintf(ptr, "<h1>Bad Request</h1><h3>");

ptr += sprintf(ptr, msg);

ptr += sprintf(ptr, "</h3>URL must be of the form:<br />http://[domain]/get_params?msg=[msg_str]&light=[on/off]&retval=[retval_str]<br /><br />");

ptr += sprintf(ptr, "For example, copy and paste the following into your internet browser:<br />");

ptr += sprintf(ptr, "<pre>http://%s/get_params?msg=Heres-a-message&light=on&retval=Heres-a-return-value</pre>", ip_str_buffer);

return gos_hs_return_status_code(request, 400, buffer);

}