有没有办法将文件的内容传递给 curl？

Question

我想从命令行执行一个具有多部分/混合边界的相当复杂的 HTTP 请求。

POST /batch HTTP/1.1
Host: www.googleapis.com
Content-length: 592
Content-type: multipart/mixed; boundary=batch_0123456789
Authorization: Bearer authorization_token

--batch_0123456789
Content-Type: application/http
Content-ID: <item1:user@example.com>
Content-Transfer-Encoding: binary


POST /drive/v2/files/fileId/permissions
Content-Type: application/json
Content-Length: 71


{
  "role": "reader",
  "type": "user",
  "value": "user@example.com"
} 


--batch_0123456789
Content-Type: application/http
Content-ID: <item2:user@example.com>
Content-Transfer-Encoding: binary


POST /drive/v2/files/fileId/permissions
Content-Type: application/json
Content-Length: 71


{
  "role": "reader",
  "type": "user",
  "value": "user@example.com"
}


--batch_0123456789--

理想情况下，我想将此请求放入一个文件中，然后简单地调用 curl 来执行该 HTTP 请求。

curl myrequest.txt

有什么简单直接的方法吗？我知道有些客户端库有其惯用的处理方式，但我很想知道是否有办法从命令行执行此操作。

Answer 1

您可以使用--config 选项（有关详细信息，请参阅manual 的“配置文件”部分）：

curl --config myrequest.txt

我认为没有一种干净的方法可以在配置文件中嵌入多行 POST 正文。您可以用 \r\n 替换每个换行符（多部分请求需要 CRLF 换行符）：

url = "http://www.googleapis.com/batch"
header = "Content-length: 592"
header = "Content-type: multipart/mixed; boundary=batch_0123456789"
header = "Authorization: Bearer authorization_token"
data-binary = "--batch_0123456789\r\nContent-Type: application/http\r\nContent-ID: <item1:user@example.com>\r\nContent-Transfer-Encoding: binary\r\n\r\n..."

但这不是很容易阅读。

或者，您可以将 POST 正文放在单独的文件中。例如：

myrequest.txt

url = "http://www.googleapis.com/batch"
header = "Content-length: 592"
header = "Content-type: multipart/mixed; boundary=batch_0123456789"
header = "Authorization: Bearer authorization_token"
data-binary = "@myrequestbody.txt"

myrequestbody.txt

--batch_0123456789
Content-Type: application/http
Content-ID: <item1:user@example.com>
Content-Transfer-Encoding: binary


POST /drive/v2/files/fileId/permissions
Content-Type: application/json
Content-Length: 71

...