Insert line in InfluxDB using CURL

Question

I have the following POST request which is done from C#:

POST http://192.168.123.27:8086/write?db=HWDB HTTP/1.1
Content-Type: text/plain; charset=utf-8
Host:         


        

Answer 1

Regarding the data.txt file, Windows is the key factor here. It is almost certainly introducing a CRLF rather than just a linefeed at the end of the lines. See the InfluxDB docs for more.

As for the direct example at the top of your post:

curl -i -XPOST http://192.168.123.27:8086/write?db=HWDB --data-binary "HARDWARE,CPU="1" value=91, CPU="2" value=92 1422568543702900257"

the content is not valid line protocol format and can never work. Each point must be on a new line, and values cannot be shared between points. Stripping out the curl syntax, this is the attempted write:

HARDWARE,CPU="1" value=91, CPU="2" value=92 1422568543702900257

And this is the actual valid syntax:

HARDWARE,CPU="1" value=91 1422568543702900257
HARDWARE,CPU="2" value=92 1422568543702900257

Answer 2

https://docs.influxdata.com/influxdb/v1.6/write_protocols/line_protocol_reference/

<measurement>[,<tag_key>=<tag_value>[,<tag_key>=<tag_value>]] <field_key>=<field_value>[,<field_key>=<field_value>] [<timestamp>]