了解包含多个 Content-Type headers 的 curl POST 请求命令

Question

以下 curl 命令：

curl -v -F 'json={"method":"update_video","params":{"video":{"id":"582984001","itemState":"INACTIVE"},"token":"jCoXH5OAMYQtXm1sg62KAF3ysG90YLagEECDAdlhg.."}}' https://api.somewebservice.com/services/post

产生这个输出：

{"method":"update_video","params":{"video":{"id":"55269001","itemState":"INACTIVE"},"token":"jCoXH1sg62KAF3ysG90YLagEECTP16uOUSg_fDAdlhg.."}}' https://api.somewebservice.com/services/post
*   Trying 64.74.101.65...
* Connected to api.somewebservice.com (64.74.101.65) port 443 (#0)
* TLSv1.0, TLS handshake, Client hello (1):
* TLSv1.0, TLS handshake, Server hello (2):
* TLSv1.0, TLS handshake, CERT (11):
* TLSv1.0, TLS handshake, Server key exchange (12):
* TLSv1.0, TLS handshake, Server finished (14):
* TLSv1.0, TLS handshake, Client key exchange (16):
* TLSv1.0, TLS change cipher, Client hello (1):
* TLSv1.0, TLS handshake, Finished (20):
* TLSv1.0, TLS change cipher, Client hello (1):
* TLSv1.0, TLS handshake, Finished (20):
* SSL connection using TLSv1.0 / DHE-RSA-AES256-SHA
* Server certificate:
*    subject: OU=Domain Control Validated; OU=Issued through Somewebservice Inc. E-PKI Manager; OU=COMODO SSL; CN=api.brightcove.com
*    start date: 2015-09-02 00:00:00 GMT
*    expire date: 2016-10-09 23:59:59 GMT
*    subjectAltName: api.somewebservice.com matched
*    issuer: C=GB; ST=Greater Manchester; L=Salford; O=COMODO CA Limited; CN=COMODO RSA Domain Validation Secure Server CA
*    SSL certificate verify ok.
> POST /services/post HTTP/1.1
> User-Agent: curl/7.41.0
> Host: api.somewebservice.com
> Accept: */*
> Content-Length: 294
> Expect: 100-continue
> Content-Type: multipart/form-data; boundary=------------------------5106835c8f9f70f9
>
< HTTP/1.1 100 Continue
< HTTP/1.1 200 OK
< Content-Type: application/json;charset=UTF-8
< Content-Length: 943
< Date: Sun, 10 Apr 2016 22:29:23 GMT
< Server: somewebservice
<
* Connection #0 to host api.somewebservice.com left intact
{"result": {"id":55225001,"name":"Taxpayers pay to cover tattoos","adKeys":null,"shortDescription":"Opening statements are set to begin in the trial.","longDescription":null,"creationDate":"1260220396","publishedDate":"12603101609","lastModifiedDate":"1460352526","linkURL":null,"linkText":null,"tags":["Crime","national","wtsp","neo-nazi","court","taxpayers","News","David","john"],"videoStillURL":"http:\/\/bcdownload.net\/wtsp\/35134001\/3508134001_55110080001_59001.jpg?pubId=35134001","thumbnailURL":"http:\/\/bcdownload.edgesuite.net\/wtsp\/87134001\/350134001_55110081001_th-55100159001.jpg?pubId=35084001","referenceId":"7cf007503e2ee37a","length":112106,"economics":"AD_SUPPORTED","playsTotal":248,"playsTrailingWeek":0}, "error": null, "id": null}

上面输出中有两个'Content-Type'objects：

> Content-Type: multipart/form-data;

和

< Content-Type: application/json;charset=UTF-8

根据 docs，使用 -F 允许 curl 以 multi-part 形式发送数据，但是 json= 是我在文档。我假设它正在转换 dictionary/string:

{"method":"update_video","params":{"video":{"id":"582984001","itemState":"INACTIVE"},"token":"jCoXH5OAMYQtXm1sg62KAF3ysG90YLagEECDAdlhg.."}}

到JSON？或者更准确地说，它是将 'Content-Type': 'application/json' header 添加到 POST 请求中？那么这本质上是一个具有两个不同 header 的 POST 请求吗？

Answer 1

第一个Content-Typeheader是客户端请求header的一部分，第二个是服务器[=13]的一部分=]回应header。请求和响应由 2 个 CRLF 分隔。请求和响应各有自己的 Content-Types.

了解包含多个 Content-Type headers 的 curl POST 请求命令

Understanding curl POST request command that contains multiple Content-Type headers

post

json

curl

http-headers