使用 rvest 从 R 中的 crickbuzz 中抓取匹配分数

Question

我正在抓取页面 Crickbuzz scores 以获取比赛详情。我正在使用选择器小工具获取 css 标签。到目前为止我所做的事情是：

crickbuzz <- read_html(httr::GET("http://www.cricbuzz.com/cricket-match/live-scores"))
matches_dates <- crickbuzz %>%
html_nodes(".schedule-date:nth-child(1)") %>%
html_text()

我已获取比赛、比分和场地，但难以获取日期。我得到的结果低于上面的代码

> matches_dates
     "   -     " "   -     " "   "       "   "       "   "       "   "   "  "      
    "   "       "   "       "   "       "   -     " "   -     " "   -     "

表示获取21个元素，也就是当前有21个匹配项，但没有获取文本。

然后我看到了 html_nodes() 中的内容它给出了 :

{xml_nodeset (21)}
 1 <span class="schedule-date" timestamp="1452132000000" format="MMM dd'">    
   </span>
2 <span class="schedule-date" timestamp="1452132000000" format="MMM dd'">    
   </span>
3 <span class="schedule-date" timestamp="1452132000000" format="MMM dd'">    
   </span> and so on....

这意味着我没有从标签中获取文本。怎么做？

Answer 1

您需要使用时间戳属性提取它：

library(rvest)
crickbuzz <- read_html(httr::GET("http://www.cricbuzz.com/cricket-match/live-scores"))
matches_dates <- crickbuzz %>%
    html_nodes(".schedule-date:nth-child(1)")%>%
   html_attr("timestamp")

matches_dates
 [1] "1452268800000" "1452132000000" "1452247200000" "1452242400000" "1452327000000" "1452290400000" "1452310200000" "1452310200000" "1452310200000"
[10] "1452310200000" "1452324600000" "1452324600000" "1452324600000" "1452324600000" "1452324600000" "1452150000000" "1452153600000" "1452153600000"

# this is the unix time and so if you need to convert to date-time format, follow the answer
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使用 rvest 从 R 中的 crickbuzz 中抓取匹配分数

using rvest to scrape match scores from crickbuzz in R

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