需求：drupal7通过配置方式（不编码）提供restful service接口，手机app上传邮箱、头像等信息用于更改个人信息。
现状：通过配置drupal7，http头如下：
GET /userapi/user/12.json HTTP/1.1
Host: 192.168.64.178:8083
Accept: application/json
Cache-Control: no-cache
，可以获取用户的个人信息：
{
"uid": "12",
"name": "test1",
"mail": "abc@163.com",
"theme": "",
"signature": "",
"signature_format": "filtered_html",
"created": "1459846017",
"access": "1461028487",
"login": "1460973388",
"status": "1",
"timezone": "Asia/Shanghai",
"language": "",
"picture": {
"fid": "12",
"uid": "1",
"filename": "picture-12-1460985953.jpg",
"uri": "public://pictures/picture-12-1460985953.jpg",
"filemime": "image/jpeg",
"filesize": "100982",
"status": "1",
"timestamp": "1460985953",
"rdf_mapping": [],
"url": "http://192.168.64.178:8083/sites/default/files/pictures/picture-12-1460985953.jpg"
},
"init": "dongdong20111989@163.com",
"data": false,
"roles": {
"2": "authenticated user"
},
}
。更改邮箱信息时，http头：
PUT /userapi/user/12 HTTP/1.1
Host: 192.168.64.178:8083
X-CSRF-TOKEN: iJTSIkT3kLSiMl2qJycHwkUdXFQnFnv3cJsnascuqxo
Accept: application/json
Cache-Control: no-cache
Content-Type: application/x-www-form-urlencoded
mail=kkk%40163.com¤t_pass=123456
，可以成功修改mail信息,返回修改结果：
{
"mail": "kkk@163.com",
"current_pass": "123456",
"uid": "12",
"roles": {
"2": "authenticated user"
}
}
，但是我想修改其中的头像picture信息，通过Content-Type: multipart/form-data方式,http头：
PUT /userapi/user/12 HTTP/1.1
Host: 192.168.64.178:8083
X-CSRF-TOKEN: iJTSIkT3kLSiMl2qJycHwkUdXFQnFnv3cJsnascuqxo
Accept: application/json
Cache-Control: no-cache
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW
----WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="mail"
lll@163.com
----WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="current_pass"
123456
----WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="op"
Save
----WebKitFormBoundary7MA4YWxkTrZu0gW
，上传图片但是修改不成功。跟这个问题类似http://drupal.stackexchange.com/questions/58611/how-to-save-images-using-services-3，谢谢。