Personal code snippets of @tmasjc


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Trigger Dingtalk Robot from R

Nov 10, 2019 #httr #webhooks

Dingtalk is the official comm tool in our work. They provide an interface which allow users to add robot to a group. A robot is merely a webhook that receives POST requests. More details can be found on docs.

Here I use the signature method to provide extra security. For this method to work, we need 3 piece of information. Token (1) and secret (2) can be obtained from the webhook setting. Signing (3) process is demonstrated below.



# you need to obtain these from webhook setting
url    = ""
token  = "some-token"
secret = "some-secret"
ts     = round(as.numeric(Sys.time()) * 1000)

# obtain signature 
str  <- paste(ts, secret, sep = "\n")
hmc  <- digest::hmac(secret, str, algo = "sha256", raw = TRUE)
sign <- hmc %>% base64Encode() %>% URLencode(reserved = TRUE)
endp <- glue("{url}?access_token={token}&timestamp={ts}&sign={sign}")

# there are other types of body, RTD
body <- list(
    msgtype = "text",
    text = list(content = "周末写代码的愉悦大于一切")

# send to webhook 
POST(url = endp, body = body, encode = "json", verbose())