Database.com Chatter REST API Developer's Guide - Salesforce.com

Introducing Chatter REST API
Using Chatter API Inputs
--0HWq8x4y4DSQ4fqjXt6MinVMyqbf1r
Content-Disposition: form-data; name="xml"
Content-Type: application/xml; charset=UTF-8
High priority content
Text
important
Hashtag
Please review this as soon as possible
Text
Quarterly review 2012 Q1
2012_q1
--0HWq8x4y4DSQ4fqjXt6MinVMyqbf1r
Content-Disposition: form-data; name="feedItemFileUpload"; filename="foo"
Content-Type: application/octet-stream; charset=ISO-8859-1
This is the content of the file.
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The following example posts a comment to a feed item and uploads a binary attachment:
POST /services/data/v27.0/chatter/feed-items/0D5x00000000RryCAE/comments HTTP/1.1
Authorization: OAuth 00DD0000000Jhd2!AQIAQC.lh4qTQcBhOPm4TZom5IaOOZLVPVK4wI_rPYJvmE8r2VW8XA.
OZ7S29JEM_7Ctq1lst2dzoV.owisJc0KacUbDxyae
Accept: application/json
User-Agent: Jakarta Commons-HttpClient/3.0.1
Host: instance_name
Content-Length: 978
Content-Type: multipart/form-data; boundary=F9jBDELnfBLAVmLNbnLIYibT5Icp0h3VJ7mkI
--F9jBDELnfBLAVmLNbnLIYibT5Icp0h3VJ7mkI
Content-Disposition: form-data; name="json"
Content-Type: application/json; charset=UTF-8
{ "body":
{
"messageSegments" : [
{
"type" : "Text",
"text" : "Here's another file for review."
}, {
"type" : "Hashtag",
"tag" : "important"
}, {
"type" : "Text",
"text" : "Again, please review this as soon as possible."
}
]
},
"attachment":
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