我想通过 HTTPS 读取一些数据OData http://www.odata.org/连接和数据源需要Basic认证方案。我很熟悉平常的curl http://curl.haxx.se//RCurl http://cran.r-project.org/web/packages/RCurl/index.html选项（例如username, userpwd and cainfo），但我不确定如何传递身份验证方案信息。
这是来自为另一个应用程序工作的同事的一些 C# 代码：
var bind = new HttpsTransportBindingElement();
bind.AuthenticationScheme = System.Net.AuthenticationSchemes.Basic;
所以我想我需要找出 RCurl 的等效项.NET value System.Net.AuthenticationSchemes.Basic会在 R/curl 世界中吗？
这是我到目前为止想到的：
忽略任何身份验证信息
web_page = getURL(
url = "https://xxxx.sapbydesign.com/sap/byd/odata/cc_home_analytics.svc/path/to/ressource",
username = "<username>",
userpwd = "*****",
cainfo = "inst/ssl/ca-bundle.pem"
)
这是我得到的答案（通过 Google Chrome 从德语翻译）：
<DOCTYPE html PUBLIC "- / / W3C / / DTD XHTML 1.0 Strict / / EN"
"Http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<Meta name = "generator" content =
"HTML Tidy for Linux/x86 (vers 25 March 2009), see www.w3.org" />
<title> Logon Error Message </ title>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii" />
<style type="text/css">
/ * <! [CDATA [* /
body {font-family: tahoma, helvetica, sans-serif; color: # 333333; background-color: # FFFFFF; } Td {font-family: tahoma, helvetica, sans-serif; font-size: 70%; color: # 333333; {H1} H2 {} } P {font-family: tahoma, helvetica, sans-serif; color: # 333333; margin-top: 4px; margin-bottom: 4px; Ul {} Li} {font-family: tahoma, helvetica, sans-serif; color: # 33333; margin-top: 4px; Emphasize} {color: # 333333; background-color:. # C8E3FF; padding: 5px;} note {color: # CC6600;. } A {font-family: tahoma, helvetica, sans-serif; text-decoration: underline; color: # 336699; } A: visited {color: # 001166; } A: hover {text-decoration: none; }
/ *]]> * /
</ Style>
</ Head>
<body>
<table cellpadding="0" cellspacing="0" border="0" width="100%">
<tr>
<td>
<h1> Login Failed </ h1> <br />
<h2> What happened? </ h2>
<p> Calling the URL
https://my310094.sapbydesign.com/sap/byd/odata/cc_home_analytics.svc/RPCRMQUFU_Q0001QueryResults
was aborted due to incorrect credentials. </ p>
</ Td>
</ Tr>
<tr>
<td> </ td>
</ Tr>
<tr>
<td class="emphasize">
<strong> Note </ strong> <br />
<ul>
<li> The application was running in the system KHN. </ li>
<li> The application was for the client 015 and the user and the
Performed language. </ Li>
</ Ul>
</ Td>
</ Tr>
<tr>
<td> </ td>
</ Tr>
<tr>
<td>
</ p>
<h2> What can you do? </ h2>
<ul>
<li> Check the indication of the clients, users and
the password for typos. </ li>
<li> If you do not have a user ID, contact
your system administrator. </ li>
</ Ul> <br />
<p class="note"> error code:
ICF-LE-https-c:015-l:-u:-a:1-c:015-l:-r:0-T:1-C:1-U:8-P:-L:6-X:00163E0746C81EE484C92B972817350C_00163E0746C81EE484C92B969D80750C_1-x:00163E0746C81EE484C92B972817550C</p><br />
<p> HTTP 401 - Unauthorized <br /> </ p>
<p> Your SAP Internet Communication Framework Team </ p>
</ Td>
</ Tr>
</ Table>
</ Body>
</ Html>
指定httpauth
基于这个帖子 https://stackoverflow.com/questions/11173677/how-do-i-disable-the-curlopt-httpauth-option-in-php，我尝试了以下方法：
web_page = getURL(
url = "https://xxxx.sapbydesign.com/sap/byd/odata/cc_home_analytics.svc/path/to/ressource",
username = "<username>",
userpwd = "*****",
cainfo = "inst/ssl/ca-bundle.pem",
httpauth = "CURLAUTH_BASIC"
)
这次，答案看起来有所不同（（通过 Google Chrome 翻译自德语）：
<DOCTYPE html PUBLIC "- / / W3C / / DTD XHTML 1.0 Strict / / EN"
"Http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<Meta name = "generator" content =
"HTML Tidy for Linux/x86 (vers 25 March 2009), see www.w3.org" />
<title> Logon Error Message </ title>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii" />
<style type="text/css">
/ * <! [CDATA [* /
body {font-family: tahoma, helvetica, sans-serif; color: # 333333; background-color: # FFFFFF; } Td {font-family: tahoma, helvetica, sans-serif; font-size: 70%; color: # 333333; {H1} H2 {} } P {font-family: tahoma, helvetica, sans-serif; color: # 333333; margin-top: 4px; margin-bottom: 4px; Ul {} Li} {font-family: tahoma, helvetica, sans-serif; color: # 33333; margin-top: 4px; Emphasize} {color: # 333333; background-color:. # C8E3FF; padding: 5px;} note {color: # CC6600;. } A {font-family: tahoma, helvetica, sans-serif; text-decoration: underline; color: # 336699; } A: visited {color: # 001166; } A: hover {text-decoration: none; }
/ *]]> * /
</ Style>
</ Head>
<body>
<table cellpadding="0" cellspacing="0" border="0" width="100%">
<tr>
<td>
<h1> Login Failed </ h1> <br />
<h2> What happened? </ h2>
<p> Calling the URL
https://my310094.sapbydesign.com/sap/byd/odata/cc_home_analytics.svc was
aborted due to incorrect credentials. </ p>
</ Td>
</ Tr>
<tr>
<td> </ td>
</ Tr>
<tr>
<td class="emphasize"> <strong> Note </ strong> <br />
The application was running in the system KHN. Here were no
Credentials provided. </ Td>
</ Tr>
<tr>
<td> </ td>
</ Tr>
<tr>
<td>
</ p>
<h2> What can you do? </ h2>
<ul>
<li> If you do not have a user ID, contact
your system administrator. </ li>
</ Ul> <br />
<p class="note"> error code:
ICF-LE-https-c:015-l:-u:-a:0-c:015-l:-r:99-T:-C:1-U:-P:-L:6-X:00163E0746C81EE484CA0C65DC12398A_00163E0746C81EE484CA0C65D826798A_1-x:00163E0746C81EE484CA0C65DC12598A</p><br />
<p> HTTP 401 - Unauthorized <br /> </ p>
<p> Your SAP Internet Communication Framework Team </ p>
</ Td>
</ Tr>
</ Table>
</ Body>
</ Html>
