[英]Attach a knitted tempfile to email in R shiny
我有一個工作閃亮的應用程序,使用Mailgun
在單擊按鈕時發送電子郵件,並在單擊另一個按鈕時生成rmarkdown報告。
這是工作代碼,顯然沒有工作電子郵件身份驗證:
ui.R
library(shiny)
# Define UI for application that draws a histogram
shinyUI(fluidPage(
sliderInput("slider", "Slider", 1, 100, 50),
downloadButton("report", "Generate report"),
actionButton("mail", "send email"),
textOutput('mailo')
)
)
server.R
library(shiny)
sendEmail <- function(email = "xxx@you.org",
mail_message = "Hello"){
url <- "https://api.mailgun.net/v3/sandboxxxxxxxxx.mailgun.org/messages"
## username:password so api_key is all after the api:
api_key <- "key-0xxxxxxxxxxxx"
the_body <-
list(
from="Mailgun Sandbox <postmaster@sandboxxxxxxxxxxxxxxxx.mailgun.org>",
to=email,
subject="Mailgun from R test",
text=mail_message
)
req <- httr::POST(url,
httr::authenticate("api", api_key),
encode = "form",
body = the_body)
httr::stop_for_status(req)
TRUE
}
# Define server logic required to draw a histogram
shinyServer(function(input, output) {
event <- observeEvent(input$mail,{
sendEmail()
}, ignoreInit = TRUE)
output$mailo <- renderText({print("EMAIL SENT!")})
output$report <- downloadHandler(
# For PDF output, change this to "report.pdf"
filename = "report.html",
content = function(file) {
# Copy the report file to a temporary directory before processing it, in
# case we don't have write permissions to the current working dir (which
# can happen when deployed).
tempReport <- file.path(tempdir(), "report.Rmd")
file.copy("report.Rmd", tempReport, overwrite = TRUE)
# Set up parameters to pass to Rmd document
params <- list(n = input$slider)
# Knit the document, passing in the `params` list, and eval it in a
# child of the global environment (this isolates the code in the document
# from the code in this app).
rmarkdown::render(tempReport,
output_file = file,
params = params,
envir = new.env(parent = globalenv())
)
}
)
})
我想一步到位做兩件事。 也就是說,生成報告,將其附加到電子郵件並將其發送到給定地址。 我只是不確定在引用文件時如何處理tempfile()
。
我目前也在Shinyapps.io上部署了應用程序,因此保存到文件然后檢索將無法正常工作。
有任何想法嗎?
這是您需要的代碼。 我測試了它並且它工作了,雖然我的gmail確實給了我巨大的黃色警告,電子郵件包含一個可能是危險的未經驗證的文件。 我還簡化了應用程序並刪除了一些不必要的代碼。
library(shiny)
ui <- fluidPage(
sliderInput("slider", "Slider", 1, 100, 50),
actionButton("mail", "send email")
)
sendEmail <- function(email = "RECIPIENT@gmail.com",
mail_message = "Hello",
file = NULL) {
url <- "https://api.mailgun.net/v3/sandboxxxxxxxxxxxxxxxxxxxxxxxx.mailgun.org/messages"
## username:password so api_key is all after the api:
api_key <- "XXXXXXXXXXXXXXXXXX-XXXXXXXXX-XXXXX"
the_body <-
list(
from = "Mailgun Sandbox <postmaster@sandboxXXXXXXXXXXXXXXXXXXX.mailgun.org>",
to = email,
subject = "Mailgun from R test",
text = mail_message
)
if (!is.null(file)) {
the_body$attachment = httr::upload_file(file)
}
req <- httr::POST(url,
httr::authenticate("api", api_key),
encode = "multipart",
body = the_body)
httr::stop_for_status(req)
TRUE
}
server <- function(input, output, session) {
observeEvent(input$mail, {
# Copy the report file to a temporary directory before processing it, in
# case we don't have write permissions to the current working dir (which
# can happen when deployed).
tempReport <- file.path(tempdir(), "report.Rmd")
file.copy("report.Rmd", tempReport, overwrite = TRUE)
# Set up parameters to pass to Rmd document
params <- list(n = input$slider)
# Knit the document, passing in the `params` list, and eval it in a
# child of the global environment (this isolates the code in the document
# from the code in this app).
file <- rmarkdown::render(tempReport,
output_file = file.path(tempdir(), "report.html"),
params = params,
envir = new.env(parent = globalenv())
)
sendEmail(file = file)
})
}
shinyApp(ui, server)
順便說一下,如果你感興趣的話,還有一個IMmailgun
軟件包,但它實際上完成了你對這段代碼的處理。
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