我正在尝试从中自动提取电力报价 site .一旦我设置了邮政编码(即:300)，我就可以(手动)下载pdf文件
我正在使用 httr 包:
library(httr)
qr<- POST("http://www.qenergy.com.au/What-Are-Your-Options",
query=list(postcode=3000))
res <- htmlParse(content(qr))
问题是文件 URL 不在查询响应中。请提供任何帮助。
最佳答案
试试这个
library(httr)
qr<- POST("http://www.qenergy.com.au/What-Are-Your-Options",
encode="form",
body=list(postcode=3000))
res <- content(qr)
pdfs <- as(res['//a[contains(@href, "pdf")]/@href'], "character")
head(pdfs)
# [1] "flux-content/qenergy/pdf/VIC price fact sheet jemena distribution zone business/Jemena-Freedom-Biz-5-Day-Time-of-Use-A210.pdf"
# [2] "flux-content/qenergy/pdf/VIC price fact sheet jemena distribution zone business/Jemena-Freedom-Biz-7-Day-Time-of-Use-A250.pdf"
# [3] "flux-content/qenergy/pdf/VIC price fact sheet jemena distribution zone business/Jemena-Freedom-Biz-Single-Rate-CL.pdf"
# [4] "flux-content/qenergy/pdf/VIC price fact sheet jemena distribution zone business/Jemena-Freedom-Biz-Single-Rate.pdf"
# [5] "flux-content/qenergy/pdf/VIC price fact sheet united energy distribution zone business/United-Freedom-Biz-5-Day-Time-of-Use.pdf"
# [6] "flux-content/qenergy/pdf/VIC price fact sheet united energy distribution zone business/United-Freedom-Biz-7-Day-Time-of-Use.pdf"
关于r - Post查询后提取结果，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35779770/