r - 通过 RCurl 包将 curl 代码转换为 R？

Question

我将如何使用 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:在给伟大的 Duncan Temple Lang 发电子邮件后，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，但现在都被上面的编辑所取代(我留下了下面的内容以供引用):

我自己也想知道这个问题的答案。即使看着 TARehman 的回答，我仍然不知道该怎么做(我的缺乏理解无疑是根源)。

如果您从其网站下载 curl(我使用的是 generic-win 二进制版本)，那么这里有一种通过“system”命令在 R 中执行此操作的方法，类似于使用窗口的命令行窗口，但来自 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))

以上适用于我使用的 API 之一。然后你可以使用

我真的希望你能找到答案，因为知道它对我也很有用。

编辑:我尝试通过@TARehman 的示例使用带有 RCurl 的实际 API:

这是工作正常的 curl 代码:

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)

这是我在 RCurl 中重写它的方式:

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，这不起作用并导致以下结果(显然我没有正确理解某些东西):

* 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"