415代码使用httr和RCurl,但不只是curl [英] 415 code using httr and RCurl, but not just curl

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问题描述

我想写一个函数来处理Spotify的API的一些认证。我可以让它使用一个相当简单的curl命令,但是当我尝试使用httr或RCurl,我得到 415不支持的媒体类型响应。我在这一点上有点失落。我已经得到 POST() GET()使用这个API,但这个端点不是

> response< - POST('https://accounts.spotify.com/api/token',
accept_json(),
add_headers('Authorization'= paste('Basic',base64 (client_id,':',client_secret)),sep ='')),
body = list(grant_type ='client_credentials'),
encode ='json')

我得到一个415 status_code(response)



使用 RCurl

  httpheader<  -  c '= paste('Basic',base64(paste(client_id,':',client_secret,sep ='')),sep =''))
jsonbody< - toJSON(list(grant_type ='client_credentials' ))
postForm('https://accounts.spotify.com/api/token/',
postfields = jsonbody,
#grant_type ='client_credentials',
.opts = list(httpheader = httpheader,
verbose = TRUE))

postForm输出: p>

  *在DNS缓存中找不到主机名
*尝试194.132.198.228 ...
*连接到帐户.spotify.com(194.132.198.228)port 443(#9)
*在/etc/ssl/certs/ca-certificates.crt中找到173个证书
*服务器证书验证OK
*通用名称:* .spotify.com(匹配)
*服务器证书过期日期OK
*服务器证书激活日期OK
*证书公钥:RSA
*证书版本: 3
*主题:C = SE,ST =斯德哥尔摩,L =斯德哥尔摩,O = Spotify AB,CN = *。spotify.com
*开始日期:星期二,2014年04月15日00:00:00 GMT

*过期日期:Wed,21 Jun 2017 12:00:00 GMT

*发行商:C = US,O = DigiCert Inc,CN = DigiCert SHA2安全服务器CA
* compression:NULL
* cipher:AES-256-CBC
* MAC:SHA256
> POST / api / token / HTTP / 1.1
Host:accounts.spotify.com
接受:* / *
授权:Basic ZWE ... zE =
Content-Length: 182
预期:100-continue
Content-Type:multipart / form-data; boundary = ------------------------ 95ce917e6abd21b1

< HTTP / 1.1 100继续
< HTTP / 1.1 415不支持的媒体类型
*服务器nginx未列入黑名单
<服务器:nginx
<日期:Wed,21 Oct 2015 01:38:39 GMT
< Content-Length:990
<连接:keep-alive
< Keep-Alive:timeout = 10
*发送结束之前的HTTP错误,停止发送
<
*关闭连接9
错误:不支持的媒体类型



< curl 通过系统调用(或从命令行)实际工作:

 code> system(
paste('curl https://accounts.spotify.com/api/token -HAuthorization:Basic',
base64(paste(client_id,':') client_secret,sep ='')),
'-d grant_type = client_credentials',
sep =''),
intern = TRUE)






不确定这在此时是否有用。

 > devtools :: session_info()
会话信息-------------------------------------- -------------------------------------------------- ---------------
设置值
版本R版本3.2.2(2015-08-14)
系统x86_64,linux-gnu
ui RStudio(0.99.441)
language en_US
collat​​e en_US.UTF-8
tz< NA>
date 2015-10-20

包------------------------------- -------------------------------------------------- --------------------------
package *版本日期源
bitops 1.0-6 2013-08-17 CRAN( R 3.2.1)
caTools 1.17.1 2014-09-10 CRAN(R 3.2.1)
colorpace 1.2-6 2015-03-11 CRAN(R 3.2.1)
curl 0.9.3 2015-08-25 CRAN(R 3.2.2)
DBI 0.3.1 2014-09-24 CRAN(R 3.2.1)
devtools * 1.9.1.9000 2015-10-21 Github (hadley / devtools @ 0295d20)
digest 0.6.8 2014-12-31 CRAN(R 3.2.1)
git2r 0.11.0 2015-08-12 CRAN(R 3.2.2)
httr * 1.0.0.9000 2015-10-21 github(hadley / httr @ f7593b7)
jsonlite * 0.9.17 2015-09-06 CRAN(R 3.2.2)
knitr 1.11 2015-08- 14 CRAN(R 3.2.2)
magrittr 1.5 2014-11-22 CRAN(R 3.2.1)
memoise 0.2.1 2014-04-22 CRAN(R 3.2.1)
R6 2.1.1 2015-08-19 CRAN(R 3.2.2)
Rcpp 0.12.1 2015-09-10 CRAN(R 3.2.2)
RCurl * 1.96-0 2015-07-27本地
RJSONIO * 1.3-0 2014-07-28 CRAN(R 3.2.2)
roxygen2 4.1.1 2015-04-15 CRAN(R 3.2.1)
RSelenium * 1.3。 5 2014-10-26 CRAN(R 3.2.2)
rstudioapi 0.3.1 2015-04-07 CRAN(R 3.2.1)
stringi 0.5-5 2015-06-29 CRAN(R 3.2 .2)
stringr * 1.0.0 2015-04-30 CRAN(R 3.2.2)
XML * 3.98-1.3 2015-06-30 CRAN(R 3.2.2)


解决方案

特定的Spotify端点正在寻找 Content- :application / x-www-form-urlencoded 与JSON相同。这应该工作(它为我做):

  library(httr)

response< POST('https://accounts.spotify.com/api/token',
accept_json(),
authenticate(Sys.getenv(SPOTIFY_CLIENT_ID),Sys.getenv(SPOTIFY_CLIENT_SECRET)) ,
body = list(grant_type ='client_credentials'),
encode ='form',
verbose())

(您可以移除生产中的 verbose()



注意 encode ='form',但也要注意,你可以使用 authenticate() auth头(我存储env变量中的所有键,因此使用 Sys.getenv()


I'm trying to write a function that handles some of the authentication for Spotify's API. I can get it to work with a fairly simple curl command, but when I try to use httr or RCurl, I get 415 Unsupported Media Type responses. I'm somewhat at a loss at this point. I've gotten POST(), and GET() to work with this API already, but this endpoint is not working.

Using httr:

response <- POST('https://accounts.spotify.com/api/token',
                 accept_json(),
                 add_headers('Authorization'=paste('Basic',base64(paste(client_id,':',client_secret)),sep=' ')),
                 body=list(grant_type='client_credentials'),
                 encode='json')

I get a 415 status_code(response)

Using RCurl:

httpheader <- c('Authorization'=paste('Basic ',base64(paste(client_id,':',client_secret,sep='')),sep=''))
jsonbody <- toJSON(list(grant_type='client_credentials'))
postForm('https://accounts.spotify.com/api/token/',
         postfields=jsonbody,
         # grant_type='client_credentials',
         .opts = list(httpheader=httpheader,
                      verbose=TRUE))

postForm output:

* Hostname was NOT found in DNS cache
*   Trying 194.132.198.228...
* Connected to accounts.spotify.com (194.132.198.228) port 443 (#9)
* found 173 certificates in /etc/ssl/certs/ca-certificates.crt
*    server certificate verification OK
*    common name: *.spotify.com (matched)
*    server certificate expiration date OK
*    server certificate activation date OK
*    certificate public key: RSA
*    certificate version: #3
*    subject: C=SE,ST=Stockholm,L=Stockholm,O=Spotify AB,CN=*.spotify.com
*    start date: Tue, 15 Apr 2014 00:00:00 GMT

*    expire date: Wed, 21 Jun 2017 12:00:00 GMT

*    issuer: C=US,O=DigiCert Inc,CN=DigiCert SHA2 Secure Server CA
*    compression: NULL
*    cipher: AES-256-CBC
*    MAC: SHA256
> POST /api/token/ HTTP/1.1
Host: accounts.spotify.com
Accept: */*
Authorization: Basic ZWE...zE=
Content-Length: 182
Expect: 100-continue
Content-Type: multipart/form-data; boundary=------------------------95ce917e6abd21b1

< HTTP/1.1 100 Continue
< HTTP/1.1 415 Unsupported Media Type
* Server nginx is not blacklisted
< Server: nginx
< Date: Wed, 21 Oct 2015 01:38:39 GMT
< Content-Length: 990
< Connection: keep-alive
< Keep-Alive: timeout=10
* HTTP error before end of send, stop sending
< 
* Closing connection 9
Error: Unsupported Media Type

using curl through a system call (or from command line) actually works:

system(
  paste('curl https://accounts.spotify.com/api/token -H "Authorization: Basic ',
        base64(paste(client_id,':',client_secret,sep='')),
        '" -d grant_type=client_credentials ',
        sep=''),
  intern=TRUE)


Not sure if this is useful at this point.

> devtools::session_info()
Session info -------------------------------------------------------------------------------------------------------
 setting  value                       
 version  R version 3.2.2 (2015-08-14)
 system   x86_64, linux-gnu           
 ui       RStudio (0.99.441)          
 language en_US                       
 collate  en_US.UTF-8                 
 tz       <NA>                        
 date     2015-10-20                  

Packages -----------------------------------------------------------------------------------------------------------
 package    * version    date       source                          
 bitops       1.0-6      2013-08-17 CRAN (R 3.2.1)                  
 caTools      1.17.1     2014-09-10 CRAN (R 3.2.1)                  
 colorspace   1.2-6      2015-03-11 CRAN (R 3.2.1)                  
 curl         0.9.3      2015-08-25 CRAN (R 3.2.2)                  
 DBI          0.3.1      2014-09-24 CRAN (R 3.2.1)                  
 devtools   * 1.9.1.9000 2015-10-21 Github (hadley/devtools@0295d20)
 digest       0.6.8      2014-12-31 CRAN (R 3.2.1)                  
 git2r        0.11.0     2015-08-12 CRAN (R 3.2.2)                  
 httr       * 1.0.0.9000 2015-10-21 Github (hadley/httr@f7593b7)    
 jsonlite   * 0.9.17     2015-09-06 CRAN (R 3.2.2)                  
 knitr        1.11       2015-08-14 CRAN (R 3.2.2)                  
 magrittr     1.5        2014-11-22 CRAN (R 3.2.1)                  
 memoise      0.2.1      2014-04-22 CRAN (R 3.2.1)                  
 R6           2.1.1      2015-08-19 CRAN (R 3.2.2)                  
 Rcpp         0.12.1     2015-09-10 CRAN (R 3.2.2)                  
 RCurl      * 1.96-0     2015-07-27 local                           
 RJSONIO    * 1.3-0      2014-07-28 CRAN (R 3.2.2)                  
 roxygen2     4.1.1      2015-04-15 CRAN (R 3.2.1)                  
 RSelenium  * 1.3.5      2014-10-26 CRAN (R 3.2.2)                  
 rstudioapi   0.3.1      2015-04-07 CRAN (R 3.2.1)                  
 stringi      0.5-5      2015-06-29 CRAN (R 3.2.2)                  
 stringr    * 1.0.0      2015-04-30 CRAN (R 3.2.2)                  
 XML        * 3.98-1.3   2015-06-30 CRAN (R 3.2.2)        

解决方案

That particular Spotify endpoint is looking for Content-Type: application/x-www-form-urlencoded vs JSON as you have it. This should work (it did for me):

library(httr)

response <- POST('https://accounts.spotify.com/api/token',
                 accept_json(),
                 authenticate(Sys.getenv("SPOTIFY_CLIENT_ID"), Sys.getenv("SPOTIFY_CLIENT_SECRET")),
                 body=list(grant_type='client_credentials'),
                 encode='form',
                 verbose())

(You can remove the verbose() in production)

Note the encode='form' but also note that you can use authenticate() vs build your own basic auth header (I store all keys in env variables, hence the use of Sys.getenv().

这篇关于415代码使用httr和RCurl,但不只是curl的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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