在rstudio OpenCPU中启动OnAttach失败

Question

我正在尝试获得一个简单的OpenCPU应用程序(从https://www.opencpu.org/download.html)。

由于我是在AWS上的Ubuntu，所以我遵循Ubuntu的说明：

# Requires Ubuntu 14.04 (Trusty) or 16.04 (Xenial)
sudo add-apt-repository -y ppa:opencpu/opencpu-1.6
sudo apt-get update 
sudo apt-get upgrade

# Installs OpenCPU server
sudo apt-get install -y opencpu
# Done! Open http://yourhost/ocpu in your browser

# Optional: installs rstudio in http://yourhost/rstudio
sudo apt-get install -y rstudio-server 

过得很好。

接下来，我尝试在Rstudio中安装这个包：

install.packages("opencpu")
Installing package into ‘/home/ruser/R/x86_64-pc-linux-gnu-library/3.3’
(as ‘lib’ is unspecified)
trying URL 'https://cran.rstudio.com/src/contrib/opencpu_1.6.1.tar.gz'
Content type 'unknown' length 563159 bytes (549 KB)
==================================================
downloaded 549 KB

* installing *source* package ‘opencpu’ ...
** package ‘opencpu’ successfully unpacked and MD5 sums checked
** R
** inst
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** installing vignettes
** testing if installed package can be loaded
* DONE (opencpu)

The downloaded source packages are in
    ‘/tmp/RtmpON3Ujv/downloaded_packages’
> library(opencpu)
Initiating OpenCPU server...
Using config: /home/ruser/.opencpu.conf
OpenCPU started.
[httpuv] http://myserver/rstudio/p/1529/ocpu
Error : .onAttach failed in attachNamespace() for 'opencpu', details:
  call: rhttpd$init()
  error: could not find function "startDynamicHelp"
Error: package or namespace load failed for ‘opencpu’

这就是我得到错误的地方。试着搜索错误但是没有运气。

Answer 1

@gaurav是正确的。关于opencpu的说明非常具有误导性，因为它们似乎显示了一组指令，但实际上，R命令是用于在交互式R会话中运行opencpu，而不是使用您新安装的opencpu云服务器。

要在新的云服务器上运行示例应用程序(我假设您正在尝试这样做)，您需要遵循云服务器的说明。

下面是对我有帮助的云服务器文档的链接：

https://cran.r-project.org/web/packages/opencpu/vignettes/opencpu-server.pdf

具体来说，要运行示例应用程序，您需要以root用户身份启动R会话，并安装包：

sudo -i
R

#then from r session
library(devtools)
install_github("opencpu/gitstats")
install_github("opencpu/stocks")

#then quit
quit()

exit

然后重新启动opencpu服务：

sudo service opencpu restart

然后，您可以使用opencpu导航到包。在web浏览器中，转到：

http://localhost/ocpu/library/gitstats/www/

你看-