流cURL响应到另一个发布结果的cURL命令 [英] Stream cURL response to another cURL command posting the result

问题描述

有一个公开的流媒体Meetup API，用于流JSON事件： http://stream.meetup.com/ 2 / rsvps

There's a public streaming Meetup API that streams JSON events: http://stream.meetup.com/2/rsvps

在命令行的一行中，我希望能够重定向该流，以便将每个JSON对象发布到另一个API。

In a single line from the command line, I'd like to be able to redirect that stream such that each JSON object is POSTed to another API.

我已经尝试了很多cURL的排列，但到目前为止还无法使其正常工作。我当前的尝试类似于：

I've tried lots of permutations of cURL but thus far have been unable to make it work. My current attempt looks something like:

curl -s http://stream.meetup.com/2/rsvps | curl -H "Content-Type: application/json" -X POST -d @- 'http://my-api-url-here'

据我所知，这什么也没有产生。请求不会流式传输到目标API，并且没有任何内容发送到标准输出。另外，我希望看到标准输出，但核心要求是将JSON记录流式传输到目标API。

This produces nothing as far as I can see. The requests are not streamed to the destination API and nothing is sent to standard out. As a bonus, I'd like to see the standard output but the core requirement is streaming the JSON records to the target API.

如果我尝试将流重定向到a像这样的文件：

If I try redirecting the stream to a file like:

curl -s http://stream.meetup.com/2/rsvps > output.txt

这可以按预期工作。挑战似乎是将初始cURL流的输出作为数据传递到POST。

This works as expected. The challenge seems to be getting the output from the initial cURL stream to POST as data to the second.

推荐答案

假设，一次10个事件

curl -H Content-Type：application / json -X POST -d [$（ curl -s http://stream.meetup.com/2/rsvps | sed -n'1 {p;：loop n; p; 10q; b loop}'| sed -re'1,9 s / [}] $ /}，/'）]'http：// my-api-url-here'

如会议文档，可以使用since_count和since_mtime限制事件的数量。

As suggested by meetup docs, the number of events may be limited using since_count and since_mtime.

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