使用 rvest 提交表单时出错（error in enc2utf8(url)）

Question

我正在尝试抓取“https://www.vndirect.com.vn/portal/thong-ke-thi-truong-chung-khoan/ket-qua-giao-dich.shtml”中的数据。我正在使用 R 中的 rvest 包提交表单并不断收到此错误：

url <- "https://www.vndirect.com.vn/portal/thong-ke-thi-truong-chung-khoan/ket-qua-giao-dich.shtml" 

page_session <- html_session(url)                 
pgform <- html_form(page_session) %>% .[[1]]

filled_form <- set_values(form = pgform,
                          searchMarketStatisticsView.market = "HOSE",
                          strTradingDate = "06/08/2020")

来自控制台的结果：

Submitting with 'NULL'
Error in enc2utf8(url) : argument is not a character vector

当我对“https://www.vndirect.com.vn/portal/thong-ke-thi-truong-chung-khoan/lich-su-gia.shtml 执行相同操作时，这不是错误。我究竟做错了什么？谢谢大家

Answer 1

我试图找出为什么您的代码不起作用但失败了。这是有效的解决方案：

library(rvest)
url <- "https://www.vndirect.com.vn/portal/thong-ke-thi-truong-chung-khoan/ket-qua-giao-dich.shtml" 

page_session <- html_session(url)                 

page_session <- rvest:::request_POST(page_session, 
                                     "https://www.vndirect.com.vn/portal/thong-ke-thi-truong-chung-khoan/ket-qua-giao-dich.shtml",
                                     body = list(model.downloadType = "",
                                                 pagingInfo.indexPage = "1", #change to page number
                                                 searchMarketStatisticsView.market = "HOSE",
                                                 strTradingDate = "03/06/2020"))

使用 rvest 提交表单时出错（error in enc2utf8(url)）

Error when submit form with rvest (Error in enc2utf8(url))

r

web-scraping

rvest