通过RCurl包将curl代码转换为R？

Question

我如何使用R和RCurl包编写以下curl POST方法？

curl -k -u myusername:mypassword -d '{"text":"Hello World!","level":"Noob"}' -H "Content-Type: application/json" -H "Accept: application/json" "http://api.website/v1/access?"

Answer 1

最终编辑:通过电子邮件发送伟大的Duncan Temple Lang后,我有一个解决方案:

library(RCurl)
library(RJSONIO)
postForm("http://api.website/v1/access?",
         .opts = list(postfields = toJSON(list(text = "Hello World!", level = "Noob")),
                      httpheader = c('Content-Type' = 'application/json', Accept = 'application/json'),
                      userpwd = "Username:Password",
                      ssl.verifypeer = FALSE))

我之前的帖子在下面,但现在已经被上面的编辑取代了(我已经离开了以下内容供参考):

我想知道这个问题的答案.即使看着TARehman的回答,我仍然无法弄清楚如何做到这一点(我缺乏理解无疑是根本).

如果您从其网站下载curl(我使用了泛型二进制版本),那么这里是通过'system'命令在R中执行此操作的一种方法,就像使用窗口的命令行窗口但是从R:

output <- system('C:/+/curl-7.27.0-rtmp-ssh2-ssl-sspi-zlib-idn-static-bin-w32/curl  -k -u "username:password" -d "{\\"text\\":\\"Hello World!\\",\\"level\\":\\"Noob\\"}" -H "Content-Type: application/json" -H "Accept: application/json" "http://api.website/v1/access?"', intern = TRUE))

以上工作与我使用的API之一.然后你可以使用

我真的希望你找到答案,因为对我来说也是有用的.

编辑:我通过@TARehman的例子尝试使用RCurl的实际API:

这是卷曲代码,工作正常:

x = system('C:/+/curl-7.27.0-rtmp-ssh2-ssl-sspi-zlib-idn-static-bin-w32/curl  -k -u "USERNAME:PASSWORD" -d "{\\"text\\":\\"Have a nice day!\\"}" -H "Content-Type: application/json" -H "Accept: application/json" "http://api.theysay.io:60000/v1/sentiment?"', intern = TRUE)

以下是我在RCurl中重写它的方法:

curl.opts <- list(userpwd = "username:password", 
                  httpheader = "Content-Type: application/json",
                  httpheader = "Accept: application/json",
                  timeout = 20, 
                  connecttimeout = 20, 
                  verbose = TRUE, 
                  useragent = "RCurl",
                  cainfo = system.file("CurlSSL", "cacert.pem", package = "RCurl"))

postForm("http://api.theysay.io:60000/v1/sentiment?", .params = c(data = '{\\"text\\":\\"Have a nice day!\\"}'), .opts = curl.opts)

然而,这不起作用并产生以下结果(显然我没有正确理解):

* About to connect() to api.theysay.io port 60000 (#0)
*   Trying 163.1.94.100... * connected
* Connected to api.theysay.io (163.1.94.100) port 60000 (#0)
> POST /v1/sentiment? HTTP/1.1
User-Agent: RCurl
Host: api.theysay.io:60000
Accept: application/json
Content-Length: 193
Expect: 100-continue
Content-Type: multipart/form-data; boundary=----------------------------7620b19c7a5d

< HTTP/1.1 100 Continue
< HTTP/1.1 401 Unauthorized
< WWW-Authenticate: Basic realm="Secured Resource"
< Content-Type: text/plain
< Server: spray-can/1.0-M2.1
< Date: Wed, 12 Sep 2012 12:26:06 GMT
< Content-Length: 77
< 
* Ignoring the response-body
* Connection #0 to host api.theysay.io left intact
* Issue another request to this URL: 'http://api.theysay.io:60000/v1/sentiment?'
* Re-using existing connection! (#0) with host api.theysay.io
* Connected to api.theysay.io (163.1.94.100) port 60000 (#0)
* Server auth using Basic with user '[USERNAME]'
> POST /v1/sentiment? HTTP/1.1
Authorization: Basic [KEY]==
User-Agent: RCurl
Host: api.theysay.io:60000
Accept: application/json
Content-Length: 193
Expect: 100-continue
Content-Type: multipart/form-data; boundary=----------------------------949d191bdaeb

< HTTP/1.1 100 Continue
< HTTP/1.1 415 Unsupported Media Type
< Content-Type: text/plain
< Server: spray-can/1.0-M2.1
< Date: Wed, 12 Sep 2012 12:26:06 GMT
< Content-Length: 93
< 
* Connection #0 to host api.theysay.io left intact
[1] "There was a problem with the requests Content-Type:\nExpected 'text/xml' or 'application/json'"
attr(,"Content-Type")

"text/plain"