How to post in Google+ wall

Question

I want to share some information in Google+ wall from my application. For that I go through the Google+ API. In that API they are mentioning how to get access token of a particular user, but they do not mention how to post in users wall using the access token.

Answer 1

Well, Google+ doesn't have a "wall," it has "Streams." The proper term might help you find better search results. Either way, unless you're a Google partner, the news isn't good:

The API is currently limited to read-only access. From the API website:

Note: The Google+ API currently provides read-only access to public data. All API calls require either an OAuth 2.0 token or an API key.

Because it's read-only, you will not be able to update or post any information anywhere through the API -- you can only use it to pull basic information like profile and activity details.

Given that access to the API may change over time, I'll try to keep this answer up to date with information about news or changes related to write access.

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News & Updates

2015-04-28: Google+ Domains API was announced way back in August 2013, but somehow I missed its relevance to Google+.

The Google+ Domains API allows Google Apps customers and ISVs to take advantage of enhanced Google+ APIs to build tools and services that can be used in a variety of ways.

No, it does not provide full write access to a user's Google+ profile, but it does give you minor advantages over the Google+ API v1, at least within a domain. This one's mainly for mobile app developers.

2015-01-21: I have revisited many of the sources linked in this answer and searched for news regarding API changes, but Google has been quiet.

2014-03-12: Various discussion threads on Google+ about write access (or lack thereof):

• Discussion thread by Jeff Dwyer
• In-depth discussion of the topic by Thor Mitchell (the Google+ team member mentioned in Update 6)

2013-12-03: The issue thread from UPDATE 1 has finally been responded to by a Google+ project member. Additional discussion regarding write-access to Streams is taking place intermittently on the Developing with Google+ community page.

2013-07-05: A developer named Eric Leroy has built an "unofficial" JavaScript library that provides read/write extension to the Google+ API.

• via Google+ XHR Hack = w+ (Add/Post)

2013-05-14: A "social media management company" can gain additional API access by attempting to become a Google+ Pages API Partner.

• Google+ Pages API Partner Application Form
• More third party tools to help manage your Google+ page - An announcement from Eduardo Thuler
• Original Google announcement of third party management tools

Here's an excerpt from the Partner Application Form:

The Google+ pages API allows social media management companies to add Google+ page management features into their tool. Access to this API is available through a whitelist, and access is granted to partners on a company by company basis dependent on fit with this API.

Other articles explaining the lack of a write API:

• http://mashable.com/2012/08/02/google-to-developers-wont-screw-you/

2013-01-04: Google just announced Google+ History. You can use it to write "moments" (which are private by default) but can then be made public by sharing them directly to your stream and/or your profile. One of the moment types is CommentActivity.

2012-10-08: There's now a duplicate bug post with only a few comments, but you can check there for future updates as well.

2012-06-25: I came across the issue tracker post for Google+ Write Access. The enhancement request status is "New" and priority is "Medium" as of June 25^th, 2012. There are some links of interest in the comments.

Answer 2

This might help: I have made this bookmarklet to post links to pages that I liked to my stream:

javascript:location='https://plusone.google.com/_/+1/confirm?hl=en&url='+location 

The URL is self-explanatory. If your post content can be served via URL then you can post it like that. The only difficulty is to automate the posting callback from Google but I do not need it, should not be too hard.