解决方案

在此特定用例中-与画布API -请求的标头中需要其他信息。

Solution

In this particular use case—working with the Canvas API—additional information is required in the header of the request.

使用 httr R包中的code> GET 函数，使用 add_header 参数提供参数，包括您的oauth2键。

Using the GET function from the httr R package, use the add_header parameter to supply the argument including your oauth2 key.

如果您不想将密钥硬编码到请求中，请使用选项1（推荐）。或者，使用选项2并将密钥作为字符串插入。但是在两种情况下，键都是 Bearer。

Use Option 1 if you don't want to hard code your key into the request (recommended). Or, use Option 2 and insert the key as a string. But in both cases, "Bearer " precedes the key.

# Set Up
url = "https://canvas.{institution}.edu/api/v1/courses"
key = "{secret_key}"

# OPTION 1
GET(url, add_headers(Authorization = paste("Bearer", key, sep = " ")))

# OPTION 2
courses.request = GET(url, add_headers(Authorization = "Bearer {secretkey}"))

进一步的解释

• 授权标头
的说明

• Rationale为什么持票人 必须在密钥之前。


• OAuth圣经对于理解请求的组成部分很有用



Further Explanations

• Explanation of Authorization Header
• Rationale for why "Bearer " must go before the key.
• The OAuth Bible is useful for understanding components of a request

其他任何人都可以解释其他原因吗？ ns为什么OP的示例没有起作用？

Can anyone else explain other reasons why the OP's examples didn't work?