How can I post big chuck of data to Contiki Server running on a microcontroller? #138
Comments
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Hi,
why do you explicitly use parse_blockwise? Please take a look at
https://github.com/Tanganelli/CoAPthon3/blob/master/coverage_test.py line
number 434 for a working block tranfert.
Il giorno gio 14 feb 2019 alle ore 18:36 anesh1992 <[email protected]>
ha scritto:
… This is my post handler in contiki;
#define MAX_PLUGFEST_BODY 2048
#define MAX_PLUGFEST_PAYLOAD 64 + 1 /* +1 for the terminating zero, which is not transmitted */
static int32_t large_update_size = 0;
static uint8_t large_update_store[MAX_PLUGFEST_BODY] = { 0 };
static unsigned int large_update_ct = TEXT_PLAIN;
EVENT_RESOURCE(res_configuration,
"title=\"ELEMENT TYPE\"; obs",
NULL,
res_post_put_handler_configuration,
res_post_put_handler_configuration,
NULL,
NULL
);
static void
res_post_put_handler_configuration(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
coap_packet_t *const coap_req = (coap_packet_t *)request;
uint8_t *incoming = NULL;
size_t len = 0;
unsigned int ct = -1;
REST.get_header_content_type(request, &ct);
// if(!REST.get_header_content_type(request, &ct)) {
// REST.set_response_status(response, REST.status.BAD_REQUEST);
// const char *error_msg = "NoContentType";
// REST.set_response_payload(response, error_msg, strlen(error_msg));
// return;
// }
if((len = REST.get_request_payload(request, (const uint8_t **)&incoming))) {
if(coap_req->block1_num * coap_req->block1_size + len <= sizeof(large_update_store)) {
memcpy(large_update_store + coap_req->block1_num * coap_req->block1_size, incoming, len);
large_update_size = coap_req->block1_num * coap_req->block1_size + len;
large_update_ct = ct;
REST.set_response_status(response, REST.status.CREATED);
coap_set_header_block1(response, coap_req->block1_num, 0,
coap_req->block1_size);
} else {
REST.set_response_status(response, REST.status.REQUEST_ENTITY_TOO_LARGE);
REST.set_response_payload(
response,
buffer,
snprintf((char *)buffer, MAX_PLUGFEST_PAYLOAD, "%uB max.",
sizeof(large_update_store)));
return;
}
} else {
REST.set_response_status(response, REST.status.BAD_REQUEST);
const char *error_msg = "NoPayload";
REST.set_response_payload(response, error_msg, strlen(error_msg));
return;
}
}
Python code;
from coapthon.client.helperclient import HelperClient
import socket, struct, time
import json
from coapthon import defines
import time
from coapthon.resources.resource import Resource
from coapthon.utils import parse_blockwise
conductor_host = "fd00::XXXX:XXXX:XXXX:XXXX"
port = 5683
path ="configure/res_configuration"
client = HelperClient(server=(conductor_host, port))
length = len("{\"CONDUCTOR\":\"0\",\"Device Name\":\"BOH\", \"IPV6\":\"XXXX::XXXX:XXXX:XXXX:XXXX\", \"Element Type ID\":\"17\"}")
value = parse_blockwise(length)
print(value)
response = client.post(path = path, \
payload = "{\"CONDUCTOR\":\"0\",\"Device Name\":\"BOH\", \"IPV6\":\"fd00::fd00:fd00:49bf:fd00\", \"Element Type ID\":\"17\"}", \
accept = defines.Content_types["text/plain"], \
block1= value)
print (response.pretty_print())
The problem is, complete string is not reaching to microcontroller board
running post handler, I am not sure if problem is in microcontroller code
or python code. Can somebody please hint me where is the problem? At least,
if python test code is correct or not? Thanks!
-Anesh
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Is client.post () is taking care of big data? Or do I need to pass any argument to tell post() method that it's a long string? Microcontroller running post handler resource, not recieving NUM, M and SZX as it should. |
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I did something like this and ity's working. But, It seems to me that, this is not a correct way of blockwise transfer. I made M always 1 that means server knows that more data is coming from client, when in last block when no payload is there, i am not changing M to 0, that is why getting bad request (but that is okay for me know). |
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@Tanganelli In the above code if I will not use |
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@Tanganelli I am really stuck with this block-wise transfer, With code here #138 (comment) I posted, able to send data and sometimes not, can you please provide example code for block-wise transfer?
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This is my post handler in contiki;
Python code;
The problem is, complete string is not reaching to microcontroller board running post handler, I am not sure if problem is in microcontroller code or python code. Can somebody please hint me where is the problem? At least, if python test code is correct or not? Thanks!
-Anesh
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