Question

我正在尝试制作一篇http帖子，并使用RCurl检索标题信息，我看到了一些奇怪的行为。

会话信息：

> curlVersion()$version
[1] "7.24.0"
> sessionInfo()
R version 3.0.1 (2013-05-16)
Platform: x86_64-apple-darwin10.8.0 (64-bit)

locale:
[1] en_CA.UTF-8/en_CA.UTF-8/en_CA.UTF-8/C/en_CA.UTF-8/en_CA.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] RCurl_1.95-4.1 bitops_1.0-6

我第一次看到奇怪的行为向我的工作api发帖，但是为了确保我尝试了另一个网站，它给了我相同的行为。这很好用：

> response <- postForm("http://posttestserver.com/post.php", stuff="Other stuff")
> response
[1] "Successfully dumped 1 post variables.\nView it at http://www.posttestserver.com/data/2013/10/04/{REDACTED}\nPost body was 0 chars long."
attr(,"Content-Type")

"text/html"

但我也想抓住标题信息，这里是乐趣开始的地方。

> h <- basicHeaderGatherer()
> response <- postForm("http://posttestserver.com/post.php", stuff="Other stuff", .opts=curlOptions(headerfunction=h$update))
Successfully dumped 1 post variables.
View it at http://www.posttestserver.com/data/2013/10/04/{REDACTED}
Post body was 0 chars long.> 
> response
NULL
> h$value()
                           Date                          Server     Access-Control-Allow-Origin                            Vary                  Content-Length                    Content-Type                          status 
"Fri, 04 Oct 2013 18:50:14 GMT"                        "Apache"                             "*"               "Accept-Encoding"                           "140"                     "text/html"                           "200" 
              statusMessage 
                       "OK"

响应的颜色（“Sucessfully dumped 1 ... etc”）现在是灰色的，当我没有要求时输出，同时输入V形纹也是如此。响应变量为NULL，但标题看起来很好。然后有这一行（添加verbose = TRUE）：

response <- postForm("http://posttestserver.com/post.php", stuff="Other stuff", .opts=curlOptions(headerfunction=h$update, verbose=TRUE))

让R挂起。

我一点也不知道发生了什么，任何帮助或指导方向都会受到高度赞赏。

R：来自RCurl标题问题的postForm

0 个答案: