我正在使用此应用程序作为我想要做的事情的基础。 https://github.com/sgshawnblanchard/CanvasNodeJS
我遇到的问题是，我认为我不太明白为了能够通过Canvas应用程序发布到Chatter摘要需要发生什么。我有一切正常，但在此页面上：https://github.com/sgshawnblanchard/CanvasNodeJS/blob/master/public/index.html
你会看到他正在发布一个“已签名的请求”，这里是我感到困惑的地方。我知道我需要发帖，这个价值会让salesforce知道我有权发布到Feed，但是我如何获得这个价值？在您看到的示例中。
<form action="canvas" method="post">
<input id="signed_request" name="signed_request" type="text" value="Pxy%2FPFsGb%2FfH1ORo%2B0vqdJjCi97Bypek0hzST8UIGzY%3D.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%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%3D%3D" />
<input type="submit" value="submit"/>
</form>
我知道这个值包含在2个内容中，在http://www.salesforce.com/us/developer/docs/platform_connect/Content/canvas_app_signed_req_authentication.htm
中找到签名请求是以下连接的元素的字符串：
使用HMAC SHA-256算法加密的画布应用消费者密码A句点（“。”）
在Base64中编码的上下文和授权令牌JSON
签名的请求看起来与此类似，尽管它会很多 更长： 9Rpl6rE7R2bSNjoSfYdERk8nffmgtKQNhr5U / 5eSJPI = .eyJjb250ZXh0Ijp7InVzZXIiOnsibGFuZ3V ....
我知道如何从SalesForce设置中获取我的秘密，但是我不知道“在Base64中编码的上下文和授权令牌JSON”是什么意思
我认为我需要获取这些静态值并创建一个长字符串，就像开发人员在示例中所做的那样并将其发布，以及我想要发送给Chatter的任何消息，我是否正确？或者我错过了什么？
这是我观看过的另一个视频，不过这个家伙已经没时间了，也没有显示它是如何运作的https://www.youtube.com/watch?v=kcNBwOqj2qA
答案 0 :(得分：0)
原来是我没有正确完成的权限设置。不确定哪一个让我的应用程序失败，但是我只是在Salesforce应用程序预览沙箱上创建了一个Heroku应用程序，然后对它们开箱即用的设置进行了1比1的比较。这就行了。